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Diffstat (limited to 'generic/tclZipfs.c')
| -rw-r--r-- | generic/tclZipfs.c | 5346 |
1 files changed, 5346 insertions, 0 deletions
diff --git a/generic/tclZipfs.c b/generic/tclZipfs.c new file mode 100644 index 0000000..b8a772b --- /dev/null +++ b/generic/tclZipfs.c @@ -0,0 +1,5346 @@ +/* + * tclZipfs.c -- + * + * Implementation of the ZIP filesystem used in TIP 430 + * Adapted from the implementation for AndroWish. + * + * Copyright © 2016-2017 Sean Woods <yoda@etoyoc.com> + * Copyright © 2013-2015 Christian Werner <chw@ch-werner.de> + * + * See the file "license.terms" for information on usage and redistribution of + * this file, and for a DISCLAIMER OF ALL WARRANTIES. + * + * This file is distributed in two ways: + * generic/tclZipfs.c file in the TIP430-enabled Tcl cores. + * compat/tclZipfs.c file in the tclconfig (TEA) file system, for pre-tip430 + * projects. + */ + +#include "tclInt.h" +#include "tclFileSystem.h" + +#ifndef _WIN32 +#include <sys/mman.h> +#endif /* _WIN32*/ + +#ifndef MAP_FILE +#define MAP_FILE 0 +#endif /* !MAP_FILE */ +#define NOBYFOUR +#define crc32tab crc_table[0] +#ifndef TBLS +#define TBLS 1 +#endif + +#ifdef HAVE_ZLIB +#include "zlib.h" +#include "crypt.h" +#include "zutil.h" +#include "crc32.h" + +/* +** We are compiling as part of the core. +** TIP430 style zipfs prefix +*/ + +#define ZIPFS_VOLUME "//zipfs:/" +#define ZIPFS_VOLUME_LEN 9 +#define ZIPFS_APP_MOUNT "//zipfs:/app" +#define ZIPFS_ZIP_MOUNT "//zipfs:/lib/tcl" + +/* + * Various constants and offsets found in ZIP archive files + */ + +#define ZIP_SIG_LEN 4 + +/* + * Local header of ZIP archive member (at very beginning of each member). + */ + +#define ZIP_LOCAL_HEADER_SIG 0x04034b50 +#define ZIP_LOCAL_HEADER_LEN 30 +#define ZIP_LOCAL_SIG_OFFS 0 +#define ZIP_LOCAL_VERSION_OFFS 4 +#define ZIP_LOCAL_FLAGS_OFFS 6 +#define ZIP_LOCAL_COMPMETH_OFFS 8 +#define ZIP_LOCAL_MTIME_OFFS 10 +#define ZIP_LOCAL_MDATE_OFFS 12 +#define ZIP_LOCAL_CRC32_OFFS 14 +#define ZIP_LOCAL_COMPLEN_OFFS 18 +#define ZIP_LOCAL_UNCOMPLEN_OFFS 22 +#define ZIP_LOCAL_PATHLEN_OFFS 26 +#define ZIP_LOCAL_EXTRALEN_OFFS 28 + +/* + * Central header of ZIP archive member at end of ZIP file. + */ + +#define ZIP_CENTRAL_HEADER_SIG 0x02014b50 +#define ZIP_CENTRAL_HEADER_LEN 46 +#define ZIP_CENTRAL_SIG_OFFS 0 +#define ZIP_CENTRAL_VERSIONMADE_OFFS 4 +#define ZIP_CENTRAL_VERSION_OFFS 6 +#define ZIP_CENTRAL_FLAGS_OFFS 8 +#define ZIP_CENTRAL_COMPMETH_OFFS 10 +#define ZIP_CENTRAL_MTIME_OFFS 12 +#define ZIP_CENTRAL_MDATE_OFFS 14 +#define ZIP_CENTRAL_CRC32_OFFS 16 +#define ZIP_CENTRAL_COMPLEN_OFFS 20 +#define ZIP_CENTRAL_UNCOMPLEN_OFFS 24 +#define ZIP_CENTRAL_PATHLEN_OFFS 28 +#define ZIP_CENTRAL_EXTRALEN_OFFS 30 +#define ZIP_CENTRAL_FCOMMENTLEN_OFFS 32 +#define ZIP_CENTRAL_DISKFILE_OFFS 34 +#define ZIP_CENTRAL_IATTR_OFFS 36 +#define ZIP_CENTRAL_EATTR_OFFS 38 +#define ZIP_CENTRAL_LOCALHDR_OFFS 42 + +/* + * Central end signature at very end of ZIP file. + */ + +#define ZIP_CENTRAL_END_SIG 0x06054b50 +#define ZIP_CENTRAL_END_LEN 22 +#define ZIP_CENTRAL_END_SIG_OFFS 0 +#define ZIP_CENTRAL_DISKNO_OFFS 4 +#define ZIP_CENTRAL_DISKDIR_OFFS 6 +#define ZIP_CENTRAL_ENTS_OFFS 8 +#define ZIP_CENTRAL_TOTALENTS_OFFS 10 +#define ZIP_CENTRAL_DIRSIZE_OFFS 12 +#define ZIP_CENTRAL_DIRSTART_OFFS 16 +#define ZIP_CENTRAL_COMMENTLEN_OFFS 20 + +#define ZIP_MIN_VERSION 20 +#define ZIP_COMPMETH_STORED 0 +#define ZIP_COMPMETH_DEFLATED 8 + +#define ZIP_PASSWORD_END_SIG 0x5a5a4b50 + +#define DEFAULT_WRITE_MAX_SIZE (2 * 1024 * 1024) + +/* + * Macros to report errors only if an interp is present. + */ + +#define ZIPFS_ERROR(interp,errstr) \ + do { \ + if (interp) { \ + Tcl_SetObjResult(interp, Tcl_NewStringObj(errstr, -1)); \ + } \ + } while (0) +#define ZIPFS_POSIX_ERROR(interp,errstr) \ + do { \ + if (interp) { \ + Tcl_SetObjResult(interp, Tcl_ObjPrintf( \ + "%s: %s", errstr, Tcl_PosixError(interp))); \ + } \ + } while (0) + +/* + * Macros to read and write little-endial 16 and 32 bit integers from/to ZIP + * archives. + */ + +#define ZipReadInt(p) \ + ((p)[0] | ((p)[1] << 8) | ((p)[2] << 16) | ((p)[3] << 24)) +#define ZipReadShort(p) \ + ((p)[0] | ((p)[1] << 8)) + +#define ZipWriteInt(p, v) \ + do { \ + (p)[0] = (v) & 0xff; \ + (p)[1] = ((v) >> 8) & 0xff; \ + (p)[2] = ((v) >> 16) & 0xff; \ + (p)[3] = ((v) >> 24) & 0xff; \ + } while (0) +#define ZipWriteShort(p, v) \ + do { \ + (p)[0] = (v) & 0xff; \ + (p)[1] = ((v) >> 8) & 0xff; \ + } while (0) + +/* + * Windows drive letters. + */ + +#ifdef _WIN32 +static const char drvletters[] = + "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"; +#endif /* _WIN32 */ + +/* + * Mutex to protect localtime(3) when no reentrant version available. + */ + +#if !defined(_WIN32) && !defined(HAVE_LOCALTIME_R) && TCL_THREADS +TCL_DECLARE_MUTEX(localtimeMutex) +#endif /* !_WIN32 && !HAVE_LOCALTIME_R && TCL_THREADS */ + +/* + * In-core description of mounted ZIP archive file. + */ + +typedef struct ZipFile { + char *name; /* Archive name */ + size_t nameLength; /* Length of archive name */ + char isMemBuffer; /* When true, not a file but a memory buffer */ + Tcl_Channel chan; /* Channel handle or NULL */ + unsigned char *data; /* Memory mapped or malloc'ed file */ + size_t length; /* Length of memory mapped file */ + void *ptrToFree; /* Non-NULL if malloc'ed file */ + size_t numFiles; /* Number of files in archive */ + size_t baseOffset; /* Archive start */ + size_t passOffset; /* Password start */ + size_t directoryOffset; /* Archive directory start */ + unsigned char passBuf[264]; /* Password buffer */ + size_t numOpen; /* Number of open files on archive */ + struct ZipEntry *entries; /* List of files in archive */ + struct ZipEntry *topEnts; /* List of top-level dirs in archive */ + char *mountPoint; /* Mount point name */ + size_t mountPointLen; /* Length of mount point name */ +#ifdef _WIN32 + HANDLE mountHandle; /* Handle used for direct file access. */ +#endif /* _WIN32 */ +} ZipFile; + +/* + * In-core description of file contained in mounted ZIP archive. + */ + +typedef struct ZipEntry { + char *name; /* The full pathname of the virtual file */ + ZipFile *zipFilePtr; /* The ZIP file holding this virtual file */ + size_t offset; /* Data offset into memory mapped ZIP file */ + int numBytes; /* Uncompressed size of the virtual file */ + int numCompressedBytes; /* Compressed size of the virtual file */ + int compressMethod; /* Compress method */ + int isDirectory; /* Set to 1 if directory, or -1 if root */ + int depth; /* Number of slashes in path. */ + int crc32; /* CRC-32 */ + int timestamp; /* Modification time */ + int isEncrypted; /* True if data is encrypted */ + unsigned char *data; /* File data if written */ + struct ZipEntry *next; /* Next file in the same archive */ + struct ZipEntry *tnext; /* Next top-level dir in archive */ +} ZipEntry; + +/* + * File channel for file contained in mounted ZIP archive. + */ + +typedef struct ZipChannel { + ZipFile *zipFilePtr; /* The ZIP file holding this channel */ + ZipEntry *zipEntryPtr; /* Pointer back to virtual file */ + size_t maxWrite; /* Maximum size for write */ + size_t numBytes; /* Number of bytes of uncompressed data */ + size_t numRead; /* Position of next byte to be read from the + * channel */ + unsigned char *ubuf; /* Pointer to the uncompressed data */ + int iscompr; /* True if data is compressed */ + int isDirectory; /* Set to 1 if directory, or -1 if root */ + int isEncrypted; /* True if data is encrypted */ + int isWriting; /* True if open for writing */ + unsigned long keys[3]; /* Key for decryption */ +} ZipChannel; + +/* + * Global variables. + * + * Most are kept in single ZipFS struct. When build with threading support + * this struct is protected by the ZipFSMutex (see below). + * + * The "fileHash" component is the process wide global table of all known ZIP + * archive members in all mounted ZIP archives. + * + * The "zipHash" components is the process wide global table of all mounted + * ZIP archive files. + */ + +static struct { + int initialized; /* True when initialized */ + int lock; /* RW lock, see below */ + int waiters; /* RW lock, see below */ + int wrmax; /* Maximum write size of a file */ + int idCount; /* Counter for channel names */ + Tcl_HashTable fileHash; /* File name to ZipEntry mapping */ + Tcl_HashTable zipHash; /* Mount to ZipFile mapping */ +} ZipFS = { + 0, 0, 0, DEFAULT_WRITE_MAX_SIZE, 0, + {0,{0,0,0,0},0,0,0,0,0,0,0,0,0}, + {0,{0,0,0,0},0,0,0,0,0,0,0,0,0} +}; + +/* + * For password rotation. + */ + +static const char pwrot[17] = + "\x00\x80\x40\xC0\x20\xA0\x60\xE0" + "\x10\x90\x50\xD0\x30\xB0\x70\xF0"; + +static const char *zipfs_literal_tcl_library = NULL; + +/* Function prototypes */ + +static int CopyImageFile(Tcl_Interp *interp, const char *imgName, + Tcl_Channel out); +static inline int DescribeMounted(Tcl_Interp *interp, + const char *mountPoint); +static inline int ListMountPoints(Tcl_Interp *interp); +static void SerializeCentralDirectoryEntry(char *buf, ZipEntry *z, + size_t nameLength, long long dataStartOffset); +static void SerializeCentralDirectorySuffix(char *buf, + int entryCount, long long dataStartOffset, + long long directoryStartOffset, + long long suffixStartOffset); +static void SerializeLocalEntryHeader(char *buf, ZipEntry *z, + int nameLength, int align); +#if !defined(STATIC_BUILD) +static int ZipfsAppHookFindTclInit(const char *archive); +#endif +static int ZipFSPathInFilesystemProc(Tcl_Obj *pathPtr, + void **clientDataPtr); +static Tcl_Obj * ZipFSFilesystemPathTypeProc(Tcl_Obj *pathPtr); +static Tcl_Obj * ZipFSFilesystemSeparatorProc(Tcl_Obj *pathPtr); +static int ZipFSStatProc(Tcl_Obj *pathPtr, Tcl_StatBuf *buf); +static int ZipFSAccessProc(Tcl_Obj *pathPtr, int mode); +static Tcl_Channel ZipFSOpenFileChannelProc(Tcl_Interp *interp, + Tcl_Obj *pathPtr, int mode, int permissions); +static int ZipFSMatchInDirectoryProc(Tcl_Interp *interp, + Tcl_Obj *result, Tcl_Obj *pathPtr, + const char *pattern, Tcl_GlobTypeData *types); +static Tcl_Obj * ZipFSListVolumesProc(void); +static const char *const *ZipFSFileAttrStringsProc(Tcl_Obj *pathPtr, + Tcl_Obj **objPtrRef); +static int ZipFSFileAttrsGetProc(Tcl_Interp *interp, int index, + Tcl_Obj *pathPtr, Tcl_Obj **objPtrRef); +static int ZipFSFileAttrsSetProc(Tcl_Interp *interp, int index, + Tcl_Obj *pathPtr, Tcl_Obj *objPtr); +static int ZipFSLoadFile(Tcl_Interp *interp, Tcl_Obj *path, + Tcl_LoadHandle *loadHandle, + Tcl_FSUnloadFileProc **unloadProcPtr, int flags); +static int ZipMapArchive(Tcl_Interp *interp, ZipFile *zf, + void *handle); +static void ZipfsExitHandler(ClientData clientData); +static void ZipfsSetup(void); +static int ZipChannelClose(void *instanceData, + Tcl_Interp *interp, int flags); +static Tcl_DriverGetHandleProc ZipChannelGetFile; +static int ZipChannelRead(void *instanceData, char *buf, + int toRead, int *errloc); +#ifndef TCL_NO_DEPRECATED +static int ZipChannelSeek(void *instanceData, long offset, + int mode, int *errloc); +#endif +static long long ZipChannelWideSeek(void *instanceData, + long long offset, int mode, int *errloc); +static void ZipChannelWatchChannel(void *instanceData, + int mask); +static int ZipChannelWrite(void *instanceData, + const char *buf, int toWrite, int *errloc); + +/* + * Define the ZIP filesystem dispatch table. + */ + +static const Tcl_Filesystem zipfsFilesystem = { + "zipfs", + sizeof(Tcl_Filesystem), + TCL_FILESYSTEM_VERSION_2, + ZipFSPathInFilesystemProc, + NULL, /* dupInternalRepProc */ + NULL, /* freeInternalRepProc */ + NULL, /* internalToNormalizedProc */ + NULL, /* createInternalRepProc */ + NULL, /* normalizePathProc */ + ZipFSFilesystemPathTypeProc, + ZipFSFilesystemSeparatorProc, + ZipFSStatProc, + ZipFSAccessProc, + ZipFSOpenFileChannelProc, + ZipFSMatchInDirectoryProc, + NULL, /* utimeProc */ + NULL, /* linkProc */ + ZipFSListVolumesProc, + ZipFSFileAttrStringsProc, + ZipFSFileAttrsGetProc, + ZipFSFileAttrsSetProc, + NULL, /* createDirectoryProc */ + NULL, /* removeDirectoryProc */ + NULL, /* deleteFileProc */ + NULL, /* copyFileProc */ + NULL, /* renameFileProc */ + NULL, /* copyDirectoryProc */ + NULL, /* lstatProc */ + (Tcl_FSLoadFileProc *) (void *) ZipFSLoadFile, + NULL, /* getCwdProc */ + NULL, /* chdirProc */ +}; + +/* + * The channel type/driver definition used for ZIP archive members. + */ + +static Tcl_ChannelType ZipChannelType = { + "zip", /* Type name. */ + TCL_CHANNEL_VERSION_5, + TCL_CLOSE2PROC, /* Close channel, clean instance data */ + ZipChannelRead, /* Handle read request */ + ZipChannelWrite, /* Handle write request */ +#ifndef TCL_NO_DEPRECATED + ZipChannelSeek, /* Move location of access point, NULL'able */ +#else + NULL, /* Move location of access point, NULL'able */ +#endif + NULL, /* Set options, NULL'able */ + NULL, /* Get options, NULL'able */ + ZipChannelWatchChannel, /* Initialize notifier */ + ZipChannelGetFile, /* Get OS handle from the channel */ + ZipChannelClose, /* 2nd version of close channel, NULL'able */ + NULL, /* Set blocking mode for raw channel, NULL'able */ + NULL, /* Function to flush channel, NULL'able */ + NULL, /* Function to handle event, NULL'able */ + ZipChannelWideSeek, /* Wide seek function, NULL'able */ + NULL, /* Thread action function, NULL'able */ + NULL, /* Truncate function, NULL'able */ +}; + +/* + * Miscellaneous constants. + */ + +#define ERROR_LENGTH ((size_t) -1) + +/* + *------------------------------------------------------------------------- + * + * ReadLock, WriteLock, Unlock -- + * + * POSIX like rwlock functions to support multiple readers and single + * writer on internal structs. + * + * Limitations: + * - a read lock cannot be promoted to a write lock + * - a write lock may not be nested + * + *------------------------------------------------------------------------- + */ + +TCL_DECLARE_MUTEX(ZipFSMutex) + +#if TCL_THREADS + +static Tcl_Condition ZipFSCond; + +static void +ReadLock(void) +{ + Tcl_MutexLock(&ZipFSMutex); + while (ZipFS.lock < 0) { + ZipFS.waiters++; + Tcl_ConditionWait(&ZipFSCond, &ZipFSMutex, NULL); + ZipFS.waiters--; + } + ZipFS.lock++; + Tcl_MutexUnlock(&ZipFSMutex); +} + +static void +WriteLock(void) +{ + Tcl_MutexLock(&ZipFSMutex); + while (ZipFS.lock != 0) { + ZipFS.waiters++; + Tcl_ConditionWait(&ZipFSCond, &ZipFSMutex, NULL); + ZipFS.waiters--; + } + ZipFS.lock = -1; + Tcl_MutexUnlock(&ZipFSMutex); +} + +static void +Unlock(void) +{ + Tcl_MutexLock(&ZipFSMutex); + if (ZipFS.lock > 0) { + --ZipFS.lock; + } else if (ZipFS.lock < 0) { + ZipFS.lock = 0; + } + if ((ZipFS.lock == 0) && (ZipFS.waiters > 0)) { + Tcl_ConditionNotify(&ZipFSCond); + } + Tcl_MutexUnlock(&ZipFSMutex); +} + +#else /* !TCL_THREADS */ +#define ReadLock() do {} while (0) +#define WriteLock() do {} while (0) +#define Unlock() do {} while (0) +#endif /* TCL_THREADS */ + +/* + *------------------------------------------------------------------------- + * + * DosTimeDate, ToDosTime, ToDosDate -- + * + * Functions to perform conversions between DOS time stamps and POSIX + * time_t. + * + *------------------------------------------------------------------------- + */ + +static time_t +DosTimeDate( + int dosDate, + int dosTime) +{ + struct tm tm; + time_t ret; + + memset(&tm, 0, sizeof(tm)); + tm.tm_isdst = -1; /* let mktime() deal with DST */ + tm.tm_year = ((dosDate & 0xfe00) >> 9) + 80; + tm.tm_mon = ((dosDate & 0x1e0) >> 5) - 1; + tm.tm_mday = dosDate & 0x1f; + tm.tm_hour = (dosTime & 0xf800) >> 11; + tm.tm_min = (dosTime & 0x7e0) >> 5; + tm.tm_sec = (dosTime & 0x1f) << 1; + ret = mktime(&tm); + if (ret == (time_t) -1) { + /* fallback to 1980-01-01T00:00:00+00:00 (DOS epoch) */ + ret = (time_t) 315532800; + } + return ret; +} + +static int +ToDosTime( + time_t when) +{ + struct tm *tmp, tm; + +#if !TCL_THREADS || defined(_WIN32) + /* Not threaded, or on Win32 which uses thread local storage */ + tmp = localtime(&when); + tm = *tmp; +#elif defined(HAVE_LOCALTIME_R) + /* Threaded, have reentrant API */ + tmp = &tm; + localtime_r(&when, tmp); +#else /* TCL_THREADS && !_WIN32 && !HAVE_LOCALTIME_R */ + /* Only using a mutex is safe. */ + Tcl_MutexLock(&localtimeMutex); + tmp = localtime(&when); + tm = *tmp; + Tcl_MutexUnlock(&localtimeMutex); +#endif + return (tm.tm_hour << 11) | (tm.tm_min << 5) | (tm.tm_sec >> 1); +} + +static int +ToDosDate( + time_t when) +{ + struct tm *tmp, tm; + +#if !TCL_THREADS || defined(_WIN32) + /* Not threaded, or on Win32 which uses thread local storage */ + tmp = localtime(&when); + tm = *tmp; +#elif /* TCL_THREADS && !_WIN32 && */ defined(HAVE_LOCALTIME_R) + /* Threaded, have reentrant API */ + tmp = &tm; + localtime_r(&when, tmp); +#else /* TCL_THREADS && !_WIN32 && !HAVE_LOCALTIME_R */ + /* Only using a mutex is safe. */ + Tcl_MutexLock(&localtimeMutex); + tmp = localtime(&when); + tm = *tmp; + Tcl_MutexUnlock(&localtimeMutex); +#endif + return ((tm.tm_year - 80) << 9) | ((tm.tm_mon + 1) << 5) | tm.tm_mday; +} + +/* + *------------------------------------------------------------------------- + * + * CountSlashes -- + * + * This function counts the number of slashes in a pathname string. + * + * Results: + * Number of slashes found in string. + * + * Side effects: + * None. + * + *------------------------------------------------------------------------- + */ + +static int +CountSlashes( + const char *string) +{ + int count = 0; + const char *p = string; + + while (*p != '\0') { + if (*p == '/') { + count++; + } + p++; + } + return count; +} + +/* + *------------------------------------------------------------------------- + * + * CanonicalPath -- + * + * This function computes the canonical path from a directory and file + * name components into the specified Tcl_DString. + * + * Results: + * Returns the pointer to the canonical path contained in the specified + * Tcl_DString. + * + * Side effects: + * Modifies the specified Tcl_DString. + * + *------------------------------------------------------------------------- + */ + +static char * +CanonicalPath( + const char *root, + const char *tail, + Tcl_DString *dsPtr, + int inZipfs) +{ + char *path; + int i, j, c, isUNC = 0, isVfs = 0, n = 0; + int haveZipfsPath = 1; + +#ifdef _WIN32 + if (tail[0] != '\0' && strchr(drvletters, tail[0]) && tail[1] == ':') { + tail += 2; + haveZipfsPath = 0; + } + /* UNC style path */ + if (tail[0] == '\\') { + root = ""; + ++tail; + haveZipfsPath = 0; + } + if (tail[0] == '\\') { + root = "/"; + ++tail; + haveZipfsPath = 0; + } +#endif /* _WIN32 */ + + if (haveZipfsPath) { + /* UNC style path */ + if (root && strncmp(root, ZIPFS_VOLUME, ZIPFS_VOLUME_LEN) == 0) { + isVfs = 1; + } else if (tail && + strncmp(tail, ZIPFS_VOLUME, ZIPFS_VOLUME_LEN) == 0) { + isVfs = 2; + } + if (isVfs != 1 && (root[0] == '/') && (root[1] == '/')) { + isUNC = 1; + } + } + + if (isVfs != 2) { + if (tail[0] == '/') { + if (isVfs != 1) { + root = ""; + } + ++tail; + isUNC = 0; + } + if (tail[0] == '/') { + if (isVfs != 1) { + root = "/"; + } + ++tail; + isUNC = 1; + } + } + i = strlen(root); + j = strlen(tail); + + switch (isVfs) { + case 1: + if (i > ZIPFS_VOLUME_LEN) { + Tcl_DStringSetLength(dsPtr, i + j + 1); + path = Tcl_DStringValue(dsPtr); + memcpy(path, root, i); + path[i++] = '/'; + memcpy(path + i, tail, j); + } else { + Tcl_DStringSetLength(dsPtr, i + j); + path = Tcl_DStringValue(dsPtr); + memcpy(path, root, i); + memcpy(path + i, tail, j); + } + break; + case 2: + Tcl_DStringSetLength(dsPtr, j); + path = Tcl_DStringValue(dsPtr); + memcpy(path, tail, j); + break; + default: + if (inZipfs) { + Tcl_DStringSetLength(dsPtr, i + j + ZIPFS_VOLUME_LEN); + path = Tcl_DStringValue(dsPtr); + memcpy(path, ZIPFS_VOLUME, ZIPFS_VOLUME_LEN); + memcpy(path + ZIPFS_VOLUME_LEN + i , tail, j); + } else { + Tcl_DStringSetLength(dsPtr, i + j + 1); + path = Tcl_DStringValue(dsPtr); + memcpy(path, root, i); + path[i++] = '/'; + memcpy(path + i, tail, j); + } + break; + } + +#ifdef _WIN32 + for (i = 0; path[i] != '\0'; i++) { + if (path[i] == '\\') { + path[i] = '/'; + } + } +#endif /* _WIN32 */ + + if (inZipfs) { + n = ZIPFS_VOLUME_LEN; + } else { + n = 0; + } + + for (i = j = n; (c = path[i]) != '\0'; i++) { + if (c == '/') { + int c2 = path[i + 1]; + + if (c2 == '\0' || c2 == '/') { + continue; + } + if (c2 == '.') { + int c3 = path[i + 2]; + + if ((c3 == '/') || (c3 == '\0')) { + i++; + continue; + } + if ((c3 == '.') + && ((path[i + 3] == '/') || (path[i + 3] == '\0'))) { + i += 2; + while ((j > 0) && (path[j - 1] != '/')) { + j--; + } + if (j > isUNC) { + --j; + while ((j > 1 + isUNC) && (path[j - 2] == '/')) { + j--; + } + } + continue; + } + } + } + path[j++] = c; + } + if (j == 0) { + path[j++] = '/'; + } + path[j] = 0; + Tcl_DStringSetLength(dsPtr, j); + return Tcl_DStringValue(dsPtr); +} + +/* + *------------------------------------------------------------------------- + * + * ZipFSLookup -- + * + * This function returns the ZIP entry struct corresponding to the ZIP + * archive member of the given file name. Caller must hold the right + * lock. + * + * Results: + * Returns the pointer to ZIP entry struct or NULL if the the given file + * name could not be found in the global list of ZIP archive members. + * + * Side effects: + * None. + * + *------------------------------------------------------------------------- + */ + +static ZipEntry * +ZipFSLookup( + char *filename) +{ + Tcl_HashEntry *hPtr; + ZipEntry *z = NULL; + + hPtr = Tcl_FindHashEntry(&ZipFS.fileHash, filename); + if (hPtr) { + z = (ZipEntry *) Tcl_GetHashValue(hPtr); + } + return z; +} + +/* + *------------------------------------------------------------------------- + * + * ZipFSLookupMount -- + * + * This function returns an indication if the given file name corresponds + * to a mounted ZIP archive file. + * + * Results: + * Returns true, if the given file name is a mounted ZIP archive file. + * + * Side effects: + * None. + * + *------------------------------------------------------------------------- + */ + +#ifdef NEVER_USED +static int +ZipFSLookupMount( + char *filename) +{ + Tcl_HashEntry *hPtr; + Tcl_HashSearch search; + + for (hPtr = Tcl_FirstHashEntry(&ZipFS.zipHash, &search); hPtr; + hPtr = Tcl_NextHashEntry(&search)) { + ZipFile *zf = Tcl_GetHashValue(hPtr); + + if (strcmp(zf->mountPoint, filename) == 0) { + return 1; + } + } + return 0; +} +#endif /* NEVER_USED */ + +/* + *------------------------------------------------------------------------- + * + * AllocateZipFile -- + * + * Allocates the memory for a ZipFile structure. Always ensures that it + * is zeroed out for safety. + * + * Returns: + * The allocated structure, or NULL if allocate fails. + * + * Side effects: + * The interpreter result may be written to on error. Which might fail in + * a low-memory situation. + * + *------------------------------------------------------------------------- + */ + +static ZipFile * +AllocateZipFile( + Tcl_Interp *interp, + size_t mountPointNameLength) +{ + size_t size = sizeof(ZipFile) + mountPointNameLength + 1; + ZipFile *zf = (ZipFile *) attemptckalloc(size); + + if (!zf) { + if (interp) { + Tcl_AppendResult(interp, "out of memory", (char *) NULL); + Tcl_SetErrorCode(interp, "TCL", "MALLOC", NULL); + } + } else { + memset(zf, 0, size); + } + return zf; +} + +/* + *------------------------------------------------------------------------- + * + * ZipFSCloseArchive -- + * + * This function closes a mounted ZIP archive file. + * + * Results: + * None. + * + * Side effects: + * A memory mapped ZIP archive is unmapped, allocated memory is released. + * The ZipFile pointer is *NOT* deallocated by this function. + * + *------------------------------------------------------------------------- + */ + +static void +ZipFSCloseArchive( + Tcl_Interp *interp, /* Current interpreter. */ + ZipFile *zf) +{ + if (zf->nameLength) { + ckfree(zf->name); + } + if (zf->isMemBuffer) { + /* Pointer to memory */ + if (zf->ptrToFree) { + ckfree(zf->ptrToFree); + zf->ptrToFree = NULL; + } + zf->data = NULL; + return; + } + + /* + * Remove the memory mapping, if we have one. + */ + +#ifdef _WIN32 + if (zf->data && !zf->ptrToFree) { + UnmapViewOfFile(zf->data); + zf->data = NULL; + } + if (zf->mountHandle != INVALID_HANDLE_VALUE) { + CloseHandle(zf->mountHandle); + } +#else /* !_WIN32 */ + if ((zf->data != MAP_FAILED) && !zf->ptrToFree) { + munmap(zf->data, zf->length); + zf->data = (unsigned char *) MAP_FAILED; + } +#endif /* _WIN32 */ + + if (zf->ptrToFree) { + ckfree(zf->ptrToFree); + zf->ptrToFree = NULL; + } + if (zf->chan) { + Tcl_Close(interp, zf->chan); + zf->chan = NULL; + } +} + +/* + *------------------------------------------------------------------------- + * + * ZipFSFindTOC -- + * + * This function takes a memory mapped zip file and indexes the contents. + * When "needZip" is zero an embedded ZIP archive in an executable file + * is accepted. Note that we do not support ZIP64. + * + * Results: + * TCL_OK on success, TCL_ERROR otherwise with an error message placed + * into the given "interp" if it is not NULL. + * + * Side effects: + * The given ZipFile struct is filled with information about the ZIP + * archive file. + * + *------------------------------------------------------------------------- + */ + +static int +ZipFSFindTOC( + Tcl_Interp *interp, /* Current interpreter. NULLable. */ + int needZip, + ZipFile *zf) +{ + size_t i; + unsigned char *p, *q; + + /* + * Scan backwards from the end of the file for the signature. This is + * necessary because ZIP archives aren't the only things that get tagged + * on the end of executables; digital signatures can also go there. + */ + + p = zf->data + zf->length - ZIP_CENTRAL_END_LEN; + while (p >= zf->data) { + if (*p == (ZIP_CENTRAL_END_SIG & 0xFF)) { + if (ZipReadInt(p) == ZIP_CENTRAL_END_SIG) { + break; + } + p -= ZIP_SIG_LEN; + } else { + --p; + } + } + if (p < zf->data) { + /* + * Didn't find it (or not enough space for a central directory!); not + * a ZIP archive. This might be OK or a problem. + */ + + if (!needZip) { + zf->baseOffset = zf->passOffset = zf->length; + return TCL_OK; + } + ZIPFS_ERROR(interp, "wrong end signature"); + if (interp) { + Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "END_SIG", NULL); + } + goto error; + } + + /* + * How many files in the archive? If that's bogus, we're done here. + */ + + zf->numFiles = ZipReadShort(p + ZIP_CENTRAL_ENTS_OFFS); + if (zf->numFiles == 0) { + if (!needZip) { + zf->baseOffset = zf->passOffset = zf->length; + return TCL_OK; + } + ZIPFS_ERROR(interp, "empty archive"); + if (interp) { + Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "EMPTY", NULL); + } + goto error; + } + + /* + * Where does the central directory start? + */ + + q = zf->data + ZipReadInt(p + ZIP_CENTRAL_DIRSTART_OFFS); + p -= ZipReadInt(p + ZIP_CENTRAL_DIRSIZE_OFFS); + if ((p < zf->data) || (p > zf->data + zf->length) + || (q < zf->data) || (q > zf->data + zf->length)) { + if (!needZip) { + zf->baseOffset = zf->passOffset = zf->length; + return TCL_OK; + } + ZIPFS_ERROR(interp, "archive directory not found"); + if (interp) { + Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "NO_DIR", NULL); + } + goto error; + } + + /* + * Read the central directory. + */ + + zf->baseOffset = zf->passOffset = p - q; + zf->directoryOffset = p - zf->data; + q = p; + for (i = 0; i < zf->numFiles; i++) { + int pathlen, comlen, extra; + + if (q + ZIP_CENTRAL_HEADER_LEN > zf->data + zf->length) { + ZIPFS_ERROR(interp, "wrong header length"); + if (interp) { + Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "HDR_LEN", NULL); + } + goto error; + } + if (ZipReadInt(q) != ZIP_CENTRAL_HEADER_SIG) { + ZIPFS_ERROR(interp, "wrong header signature"); + if (interp) { + Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "HDR_SIG", NULL); + } + goto error; + } + pathlen = ZipReadShort(q + ZIP_CENTRAL_PATHLEN_OFFS); + comlen = ZipReadShort(q + ZIP_CENTRAL_FCOMMENTLEN_OFFS); + extra = ZipReadShort(q + ZIP_CENTRAL_EXTRALEN_OFFS); + q += pathlen + comlen + extra + ZIP_CENTRAL_HEADER_LEN; + } + + /* + * If there's also an encoded password, extract that too (but don't decode + * yet). + */ + + q = zf->data + zf->baseOffset; + if ((zf->baseOffset >= 6) && (ZipReadInt(q - 4) == ZIP_PASSWORD_END_SIG)) { + i = q[-5]; + if (q - 5 - i > zf->data) { + zf->passBuf[0] = i; + memcpy(zf->passBuf + 1, q - 5 - i, i); + zf->passOffset -= i ? (5 + i) : 0; + } + } + return TCL_OK; + + error: + ZipFSCloseArchive(interp, zf); + return TCL_ERROR; +} + +/* + *------------------------------------------------------------------------- + * + * ZipFSOpenArchive -- + * + * This function opens a ZIP archive file for reading. An attempt is made + * to memory map that file. Otherwise it is read into an allocated memory + * buffer. The ZIP archive header is verified and must be valid for the + * function to succeed. When "needZip" is zero an embedded ZIP archive in + * an executable file is accepted. + * + * Results: + * TCL_OK on success, TCL_ERROR otherwise with an error message placed + * into the given "interp" if it is not NULL. + * + * Side effects: + * ZIP archive is memory mapped or read into allocated memory, the given + * ZipFile struct is filled with information about the ZIP archive file. + * + *------------------------------------------------------------------------- + */ + +static int +ZipFSOpenArchive( + Tcl_Interp *interp, /* Current interpreter. NULLable. */ + const char *zipname, /* Path to ZIP file to open. */ + int needZip, + ZipFile *zf) +{ + size_t i; + void *handle; + + zf->nameLength = 0; + zf->isMemBuffer = 0; +#ifdef _WIN32 + zf->data = NULL; + zf->mountHandle = INVALID_HANDLE_VALUE; +#else /* !_WIN32 */ + zf->data = (unsigned char *) MAP_FAILED; +#endif /* _WIN32 */ + zf->length = 0; + zf->numFiles = 0; + zf->baseOffset = zf->passOffset = 0; + zf->ptrToFree = NULL; + zf->passBuf[0] = 0; + + /* + * Actually open the file. + */ + + zf->chan = Tcl_OpenFileChannel(interp, zipname, "rb", 0); + if (!zf->chan) { + return TCL_ERROR; + } + + /* + * See if we can get the OS handle. If we can, we can use that to memory + * map the file, which is nice and efficient. However, it totally depends + * on the filename pointing to a real regular OS file. + * + * Opening real filesystem entities that are not files will lead to an + * error. + */ + + if (Tcl_GetChannelHandle(zf->chan, TCL_READABLE, &handle) == TCL_OK) { + if (ZipMapArchive(interp, zf, handle) != TCL_OK) { + goto error; + } + } else { + /* + * Not an OS file, but rather something in a Tcl VFS. Must copy into + * memory. + */ + + zf->length = Tcl_Seek(zf->chan, 0, SEEK_END); + if (zf->length == ERROR_LENGTH) { + ZIPFS_POSIX_ERROR(interp, "seek error"); + goto error; + } + if ((zf->length - ZIP_CENTRAL_END_LEN) + > (64 * 1024 * 1024 - ZIP_CENTRAL_END_LEN)) { + ZIPFS_ERROR(interp, "illegal file size"); + if (interp) { + Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "FILE_SIZE", NULL); + } + goto error; + } + if (Tcl_Seek(zf->chan, 0, SEEK_SET) == -1) { + ZIPFS_POSIX_ERROR(interp, "seek error"); + goto error; + } + zf->ptrToFree = zf->data = (unsigned char *) attemptckalloc(zf->length); + if (!zf->ptrToFree) { + ZIPFS_ERROR(interp, "out of memory"); + if (interp) { + Tcl_SetErrorCode(interp, "TCL", "MALLOC", NULL); + } + goto error; + } + i = Tcl_Read(zf->chan, (char *) zf->data, zf->length); + if (i != zf->length) { + ZIPFS_POSIX_ERROR(interp, "file read error"); + goto error; + } + Tcl_Close(interp, zf->chan); + zf->chan = NULL; + } + return ZipFSFindTOC(interp, needZip, zf); + + /* + * Handle errors by closing the archive. This includes closing the channel + * handle for the archive file. + */ + + error: + ZipFSCloseArchive(interp, zf); + return TCL_ERROR; +} + +/* + *------------------------------------------------------------------------- + * + * ZipMapArchive -- + * + * Wrapper around the platform-specific parts of mmap() (and Windows's + * equivalent) because it's not part of the standard channel API. + * + *------------------------------------------------------------------------- + */ + +static int +ZipMapArchive( + Tcl_Interp *interp, /* Interpreter for error reporting. */ + ZipFile *zf, /* The archive descriptor structure. */ + void *handle) /* The OS handle to the open archive. */ +{ +#ifdef _WIN32 + HANDLE hFile = (HANDLE) handle; + int readSuccessful; + + /* + * Determine the file size. + */ + +# ifdef _WIN64 + readSuccessful = GetFileSizeEx(hFile, (PLARGE_INTEGER) &zf->length) != 0; +# else /* !_WIN64 */ + zf->length = GetFileSize(hFile, 0); + readSuccessful = (zf->length != (size_t) INVALID_FILE_SIZE); +# endif /* _WIN64 */ + if (!readSuccessful || (zf->length < ZIP_CENTRAL_END_LEN)) { + ZIPFS_POSIX_ERROR(interp, "invalid file size"); + return TCL_ERROR; + } + + /* + * Map the file. + */ + + zf->mountHandle = CreateFileMappingW(hFile, 0, PAGE_READONLY, 0, + zf->length, 0); + if (zf->mountHandle == INVALID_HANDLE_VALUE) { + ZIPFS_POSIX_ERROR(interp, "file mapping failed"); + return TCL_ERROR; + } + zf->data = (unsigned char *) + MapViewOfFile(zf->mountHandle, FILE_MAP_READ, 0, 0, zf->length); + if (!zf->data) { + ZIPFS_POSIX_ERROR(interp, "file mapping failed"); + return TCL_ERROR; + } +#else /* !_WIN32 */ + int fd = PTR2INT(handle); + + /* + * Determine the file size. + */ + + zf->length = lseek(fd, 0, SEEK_END); + if (zf->length == ERROR_LENGTH || zf->length < ZIP_CENTRAL_END_LEN) { + ZIPFS_POSIX_ERROR(interp, "invalid file size"); + return TCL_ERROR; + } + lseek(fd, 0, SEEK_SET); + + zf->data = (unsigned char *) + mmap(0, zf->length, PROT_READ, MAP_FILE | MAP_PRIVATE, fd, 0); + if (zf->data == MAP_FAILED) { + ZIPFS_POSIX_ERROR(interp, "file mapping failed"); + return TCL_ERROR; + } +#endif /* _WIN32 */ + return TCL_OK; +} + +/* + *------------------------------------------------------------------------- + * + * ZipFSRootNode -- + * + * This function generates the root node for a ZIPFS filesystem. + * + * Results: + * TCL_OK on success, TCL_ERROR otherwise with an error message placed + * into the given "interp" if it is not NULL. + * + * Side effects: + * ... + * + *------------------------------------------------------------------------- + */ + +static int +ZipFSCatalogFilesystem( + Tcl_Interp *interp, /* Current interpreter. NULLable. */ + ZipFile *zf0, /* Temporary buffer hold archive descriptors */ + const char *mountPoint, /* Mount point path. */ + const char *passwd, /* Password for opening the ZIP, or NULL if + * the ZIP is unprotected. */ + const char *zipname) /* Path to ZIP file to build a catalog of. */ +{ + int pwlen, isNew; + size_t i; + ZipFile *zf; + ZipEntry *z; + Tcl_HashEntry *hPtr; + Tcl_DString ds, dsm, fpBuf; + unsigned char *q; + + /* + * Basic verification of the password for sanity. + */ + + pwlen = 0; + if (passwd) { + pwlen = strlen(passwd); + if ((pwlen > 255) || strchr(passwd, 0xff)) { + if (interp) { + Tcl_SetObjResult(interp, + Tcl_NewStringObj("illegal password", -1)); + Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "BAD_PASS", NULL); + } + return TCL_ERROR; + } + } + + /* + * Validate the TOC data. If that's bad, things fall apart. + */ + + if (zf0->baseOffset < 0 || zf0->baseOffset >= zf0->length || + zf0->passOffset < 0 || zf0->passOffset >= zf0->length || + zf0->directoryOffset < 0 || zf0->directoryOffset >= zf0->length) { + if (interp) { + Tcl_SetObjResult(interp, Tcl_NewStringObj("bad zip data", -1)); + Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "BAD_ZIP", NULL); + } + return TCL_ERROR; + } + + WriteLock(); + + /* + * Mount point sometimes is a relative or otherwise denormalized path. + * But an absolute name is needed as mount point here. + */ + + Tcl_DStringInit(&ds); + Tcl_DStringInit(&dsm); + if (strcmp(mountPoint, "/") == 0) { + mountPoint = ""; + } else { + mountPoint = CanonicalPath("", mountPoint, &dsm, 1); + } + hPtr = Tcl_CreateHashEntry(&ZipFS.zipHash, mountPoint, &isNew); + if (!isNew) { + if (interp) { + zf = (ZipFile *) Tcl_GetHashValue(hPtr); + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "%s is already mounted on %s", zf->name, mountPoint)); + Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "MOUNTED", NULL); + } + Unlock(); + ZipFSCloseArchive(interp, zf0); + return TCL_ERROR; + } + zf = AllocateZipFile(interp, strlen(mountPoint)); + if (!zf) { + Unlock(); + ZipFSCloseArchive(interp, zf0); + return TCL_ERROR; + } + Unlock(); + + /* + * Convert to a real archive descriptor. + */ + + *zf = *zf0; + zf->mountPoint = (char *) Tcl_GetHashKey(&ZipFS.zipHash, hPtr); + Tcl_CreateExitHandler(ZipfsExitHandler, zf); + zf->mountPointLen = strlen(zf->mountPoint); + zf->nameLength = strlen(zipname); + zf->name = (char *) ckalloc(zf->nameLength + 1); + memcpy(zf->name, zipname, zf->nameLength + 1); + zf->entries = NULL; + zf->topEnts = NULL; + zf->numOpen = 0; + Tcl_SetHashValue(hPtr, zf); + if ((zf->passBuf[0] == 0) && pwlen) { + int k = 0; + + zf->passBuf[k++] = pwlen; + for (i = pwlen; i-- > 0 ;) { + zf->passBuf[k++] = (passwd[i] & 0x0f) + | pwrot[(passwd[i] >> 4) & 0x0f]; + } + zf->passBuf[k] = '\0'; + } + if (mountPoint[0] != '\0') { + hPtr = Tcl_CreateHashEntry(&ZipFS.fileHash, mountPoint, &isNew); + if (isNew) { + z = (ZipEntry *) ckalloc(sizeof(ZipEntry)); + Tcl_SetHashValue(hPtr, z); + + z->tnext = NULL; + z->depth = CountSlashes(mountPoint); + z->zipFilePtr = zf; + z->isDirectory = (zf->baseOffset == 0) ? 1 : -1; /* root marker */ + z->isEncrypted = 0; + z->offset = zf->baseOffset; + z->crc32 = 0; + z->timestamp = 0; + z->numBytes = z->numCompressedBytes = 0; + z->compressMethod = ZIP_COMPMETH_STORED; + z->data = NULL; + z->name = (char *) Tcl_GetHashKey(&ZipFS.fileHash, hPtr); + z->next = zf->entries; + zf->entries = z; + } + } + q = zf->data + zf->directoryOffset; + Tcl_DStringInit(&fpBuf); + for (i = 0; i < zf->numFiles; i++) { + int extra, isdir = 0, dosTime, dosDate, nbcompr; + size_t offs, pathlen, comlen; + unsigned char *lq, *gq = NULL; + char *fullpath, *path; + + pathlen = ZipReadShort(q + ZIP_CENTRAL_PATHLEN_OFFS); + comlen = ZipReadShort(q + ZIP_CENTRAL_FCOMMENTLEN_OFFS); + extra = ZipReadShort(q + ZIP_CENTRAL_EXTRALEN_OFFS); + Tcl_DStringSetLength(&ds, 0); + Tcl_DStringAppend(&ds, (char *) q + ZIP_CENTRAL_HEADER_LEN, pathlen); + path = Tcl_DStringValue(&ds); + if ((pathlen > 0) && (path[pathlen - 1] == '/')) { + Tcl_DStringSetLength(&ds, pathlen - 1); + path = Tcl_DStringValue(&ds); + isdir = 1; + } + if ((strcmp(path, ".") == 0) || (strcmp(path, "..") == 0)) { + goto nextent; + } + lq = zf->data + zf->baseOffset + + ZipReadInt(q + ZIP_CENTRAL_LOCALHDR_OFFS); + if ((lq < zf->data) || (lq > zf->data + zf->length)) { + goto nextent; + } + nbcompr = ZipReadInt(lq + ZIP_LOCAL_COMPLEN_OFFS); + if (!isdir && (nbcompr == 0) + && (ZipReadInt(lq + ZIP_LOCAL_UNCOMPLEN_OFFS) == 0) + && (ZipReadInt(lq + ZIP_LOCAL_CRC32_OFFS) == 0)) { + gq = q; + nbcompr = ZipReadInt(gq + ZIP_CENTRAL_COMPLEN_OFFS); + } + offs = (lq - zf->data) + + ZIP_LOCAL_HEADER_LEN + + ZipReadShort(lq + ZIP_LOCAL_PATHLEN_OFFS) + + ZipReadShort(lq + ZIP_LOCAL_EXTRALEN_OFFS); + if (offs + nbcompr > zf->length) { + goto nextent; + } + if (!isdir && (mountPoint[0] == '\0') && !CountSlashes(path)) { +#ifdef ANDROID + /* + * When mounting the ZIP archive on the root directory try to + * remap top level regular files of the archive to + * /assets/.root/... since this directory should not be in a valid + * APK due to the leading dot in the file name component. This + * trick should make the files AndroidManifest.xml, + * resources.arsc, and classes.dex visible to Tcl. + */ + Tcl_DString ds2; + + Tcl_DStringInit(&ds2); + Tcl_DStringAppend(&ds2, "assets/.root/", -1); + Tcl_DStringAppend(&ds2, path, -1); + hPtr = Tcl_FindHashEntry(&ZipFS.fileHash, Tcl_DStringValue(&ds2)); + if (hPtr) { + /* should not happen but skip it anyway */ + Tcl_DStringFree(&ds2); + goto nextent; + } + Tcl_DStringSetLength(&ds, 0); + Tcl_DStringAppend(&ds, Tcl_DStringValue(&ds2), + Tcl_DStringLength(&ds2)); + path = Tcl_DStringValue(&ds); + Tcl_DStringFree(&ds2); +#else /* !ANDROID */ + /* + * Regular files skipped when mounting on root. + */ + goto nextent; +#endif /* ANDROID */ + } + Tcl_DStringSetLength(&fpBuf, 0); + fullpath = CanonicalPath(mountPoint, path, &fpBuf, 1); + z = (ZipEntry *) ckalloc(sizeof(ZipEntry)); + z->name = NULL; + z->tnext = NULL; + z->depth = CountSlashes(fullpath); + z->zipFilePtr = zf; + z->isDirectory = isdir; + z->isEncrypted = (ZipReadShort(lq + ZIP_LOCAL_FLAGS_OFFS) & 1) + && (nbcompr > 12); + z->offset = offs; + if (gq) { + z->crc32 = ZipReadInt(gq + ZIP_CENTRAL_CRC32_OFFS); + dosDate = ZipReadShort(gq + ZIP_CENTRAL_MDATE_OFFS); + dosTime = ZipReadShort(gq + ZIP_CENTRAL_MTIME_OFFS); + z->timestamp = DosTimeDate(dosDate, dosTime); + z->numBytes = ZipReadInt(gq + ZIP_CENTRAL_UNCOMPLEN_OFFS); + z->compressMethod = ZipReadShort(gq + ZIP_CENTRAL_COMPMETH_OFFS); + } else { + z->crc32 = ZipReadInt(lq + ZIP_LOCAL_CRC32_OFFS); + dosDate = ZipReadShort(lq + ZIP_LOCAL_MDATE_OFFS); + dosTime = ZipReadShort(lq + ZIP_LOCAL_MTIME_OFFS); + z->timestamp = DosTimeDate(dosDate, dosTime); + z->numBytes = ZipReadInt(lq + ZIP_LOCAL_UNCOMPLEN_OFFS); + z->compressMethod = ZipReadShort(lq + ZIP_LOCAL_COMPMETH_OFFS); + } + z->numCompressedBytes = nbcompr; + z->data = NULL; + hPtr = Tcl_CreateHashEntry(&ZipFS.fileHash, fullpath, &isNew); + if (!isNew) { + /* should not happen but skip it anyway */ + ckfree(z); + } else { + Tcl_SetHashValue(hPtr, z); + z->name = (char *) Tcl_GetHashKey(&ZipFS.fileHash, hPtr); + z->next = zf->entries; + zf->entries = z; + if (isdir && (mountPoint[0] == '\0') && (z->depth == 1)) { + z->tnext = zf->topEnts; + zf->topEnts = z; + } + if (!z->isDirectory && (z->depth > 1)) { + char *dir, *end; + ZipEntry *zd; + + Tcl_DStringSetLength(&ds, strlen(z->name) + 8); + Tcl_DStringSetLength(&ds, 0); + Tcl_DStringAppend(&ds, z->name, -1); + dir = Tcl_DStringValue(&ds); + for (end = strrchr(dir, '/'); end && (end != dir); + end = strrchr(dir, '/')) { + Tcl_DStringSetLength(&ds, end - dir); + hPtr = Tcl_CreateHashEntry(&ZipFS.fileHash, dir, &isNew); + if (!isNew) { + break; + } + zd = (ZipEntry *) ckalloc(sizeof(ZipEntry)); + zd->name = NULL; + zd->tnext = NULL; + zd->depth = CountSlashes(dir); + zd->zipFilePtr = zf; + zd->isDirectory = 1; + zd->isEncrypted = 0; + zd->offset = z->offset; + zd->crc32 = 0; + zd->timestamp = z->timestamp; + zd->numBytes = zd->numCompressedBytes = 0; + zd->compressMethod = ZIP_COMPMETH_STORED; + zd->data = NULL; + Tcl_SetHashValue(hPtr, zd); + zd->name = (char *) Tcl_GetHashKey(&ZipFS.fileHash, hPtr); + zd->next = zf->entries; + zf->entries = zd; + if ((mountPoint[0] == '\0') && (zd->depth == 1)) { + zd->tnext = zf->topEnts; + zf->topEnts = zd; + } + } + } + } + nextent: + q += pathlen + comlen + extra + ZIP_CENTRAL_HEADER_LEN; + } + Tcl_DStringFree(&fpBuf); + Tcl_DStringFree(&ds); + Tcl_FSMountsChanged(NULL); + Unlock(); + return TCL_OK; +} + +/* + *------------------------------------------------------------------------- + * + * ZipfsSetup -- + * + * Common initialisation code. ZipFS.initialized must *not* be set prior + * to the call. + * + *------------------------------------------------------------------------- + */ + +static void +ZipfsSetup(void) +{ +#if TCL_THREADS + static const Tcl_Time t = { 0, 0 }; + + /* + * Inflate condition variable. + */ + + Tcl_MutexLock(&ZipFSMutex); + Tcl_ConditionWait(&ZipFSCond, &ZipFSMutex, &t); + Tcl_MutexUnlock(&ZipFSMutex); +#endif /* TCL_THREADS */ + + Tcl_FSRegister(NULL, &zipfsFilesystem); + Tcl_InitHashTable(&ZipFS.fileHash, TCL_STRING_KEYS); + Tcl_InitHashTable(&ZipFS.zipHash, TCL_STRING_KEYS); + ZipFS.idCount = 1; + ZipFS.wrmax = DEFAULT_WRITE_MAX_SIZE; + ZipFS.initialized = 1; +} + +/* + *------------------------------------------------------------------------- + * + * ListMountPoints -- + * + * This procedure lists the mount points and what's mounted there, or + * reports whether there are any mounts (if there's no interpreter). The + * read lock must be held by the caller. + * + * Results: + * A standard Tcl result. TCL_OK (or TCL_BREAK if no mounts and no + * interpreter). + * + * Side effects: + * Interpreter result may be updated. + * + *------------------------------------------------------------------------- + */ + +static inline int +ListMountPoints( + Tcl_Interp *interp) +{ + Tcl_HashEntry *hPtr; + Tcl_HashSearch search; + ZipFile *zf; + + for (hPtr = Tcl_FirstHashEntry(&ZipFS.zipHash, &search); hPtr; + hPtr = Tcl_NextHashEntry(&search)) { + if (!interp) { + return TCL_OK; + } + zf = (ZipFile *) Tcl_GetHashValue(hPtr); + Tcl_AppendElement(interp, zf->mountPoint); + Tcl_AppendElement(interp, zf->name); + } + return (interp ? TCL_OK : TCL_BREAK); +} + +/* + *------------------------------------------------------------------------- + * + * DescribeMounted -- + * + * This procedure describes what is mounted at the given the mount point. + * The interpreter result is not updated if there is nothing mounted at + * the given point. The read lock must be held by the caller. + * + * Results: + * A standard Tcl result. TCL_OK (or TCL_BREAK if nothing mounted there + * and no interpreter). + * + * Side effects: + * Interpreter result may be updated. + * + *------------------------------------------------------------------------- + */ + +static inline int +DescribeMounted( + Tcl_Interp *interp, + const char *mountPoint) +{ + Tcl_HashEntry *hPtr; + ZipFile *zf; + + if (interp) { + hPtr = Tcl_FindHashEntry(&ZipFS.zipHash, mountPoint); + if (hPtr) { + zf = (ZipFile *) Tcl_GetHashValue(hPtr); + Tcl_SetObjResult(interp, Tcl_NewStringObj(zf->name, -1)); + return TCL_OK; + } + } + return (interp ? TCL_OK : TCL_BREAK); +} + +/* + *------------------------------------------------------------------------- + * + * TclZipfs_Mount -- + * + * This procedure is invoked to mount a given ZIP archive file on a given + * mountpoint with optional ZIP password. + * + * Results: + * A standard Tcl result. + * + * Side effects: + * A ZIP archive file is read, analyzed and mounted, resources are + * allocated. + * + *------------------------------------------------------------------------- + */ + +int +TclZipfs_Mount( + Tcl_Interp *interp, /* Current interpreter. NULLable. */ + const char *mountPoint, /* Mount point path. */ + const char *zipname, /* Path to ZIP file to mount; should be + * normalized. */ + const char *passwd) /* Password for opening the ZIP, or NULL if + * the ZIP is unprotected. */ +{ + ZipFile *zf; + + ReadLock(); + if (!ZipFS.initialized) { + ZipfsSetup(); + } + + /* + * No mount point, so list all mount points and what is mounted there. + */ + + if (!mountPoint) { + int ret = ListMountPoints(interp); + Unlock(); + return ret; + } + + /* + * Mount point but no file, so describe what is mounted at that mount + * point. + */ + + if (!zipname) { + DescribeMounted(interp, mountPoint); + Unlock(); + return TCL_OK; + } + Unlock(); + + /* + * Have both a mount point and a file (name) to mount there. + */ + + if (passwd) { + if ((strlen(passwd) > 255) || strchr(passwd, 0xff)) { + if (interp) { + Tcl_SetObjResult(interp, + Tcl_NewStringObj("illegal password", -1)); + Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "BAD_PASS", NULL); + } + return TCL_ERROR; + } + } + zf = AllocateZipFile(interp, strlen(mountPoint)); + if (!zf) { + return TCL_ERROR; + } + if (ZipFSOpenArchive(interp, zipname, 1, zf) != TCL_OK) { + ckfree(zf); + return TCL_ERROR; + } + if (ZipFSCatalogFilesystem(interp, zf, mountPoint, passwd, zipname) + != TCL_OK) { + ckfree(zf); + return TCL_ERROR; + } + ckfree(zf); + return TCL_OK; +} + +/* + *------------------------------------------------------------------------- + * + * TclZipfs_MountBuffer -- + * + * This procedure is invoked to mount a given ZIP archive file on a given + * mountpoint with optional ZIP password. + * + * Results: + * A standard Tcl result. + * + * Side effects: + * A ZIP archive file is read, analyzed and mounted, resources are + * allocated. + * + *------------------------------------------------------------------------- + */ + +int +TclZipfs_MountBuffer( + Tcl_Interp *interp, /* Current interpreter. NULLable. */ + const char *mountPoint, /* Mount point path. */ + unsigned char *data, + size_t datalen, + int copy) +{ + ZipFile *zf; + int result; + + ReadLock(); + if (!ZipFS.initialized) { + ZipfsSetup(); + } + + /* + * No mount point, so list all mount points and what is mounted there. + */ + + if (!mountPoint) { + int ret = ListMountPoints(interp); + Unlock(); + return ret; + } + + /* + * Mount point but no data, so describe what is mounted at that mount + * point. + */ + + if (!data) { + DescribeMounted(interp, mountPoint); + Unlock(); + return TCL_OK; + } + Unlock(); + + /* + * Have both a mount point and data to mount there. + */ + + zf = AllocateZipFile(interp, strlen(mountPoint)); + if (!zf) { + return TCL_ERROR; + } + zf->isMemBuffer = 1; + zf->length = datalen; + if (copy) { + zf->data = (unsigned char *) attemptckalloc(datalen); + if (!zf->data) { + if (interp) { + Tcl_AppendResult(interp, "out of memory", (char *) NULL); + Tcl_SetErrorCode(interp, "TCL", "MALLOC", NULL); + } + return TCL_ERROR; + } + memcpy(zf->data, data, datalen); + zf->ptrToFree = zf->data; + } else { + zf->data = data; + zf->ptrToFree = NULL; + } + zf->passBuf[0] = 0; /* stop valgrind cries */ + if (ZipFSFindTOC(interp, 0, zf) != TCL_OK) { + return TCL_ERROR; + } + result = ZipFSCatalogFilesystem(interp, zf, mountPoint, NULL, + "Memory Buffer"); + ckfree(zf); + return result; +} + +/* + *------------------------------------------------------------------------- + * + * TclZipfs_Unmount -- + * + * This procedure is invoked to unmount a given ZIP archive. + * + * Results: + * A standard Tcl result. + * + * Side effects: + * A mounted ZIP archive file is unmounted, resources are free'd. + * + *------------------------------------------------------------------------- + */ + +int +TclZipfs_Unmount( + Tcl_Interp *interp, /* Current interpreter. NULLable. */ + const char *mountPoint) /* Mount point path. */ +{ + ZipFile *zf; + ZipEntry *z, *znext; + Tcl_HashEntry *hPtr; + Tcl_DString dsm; + int ret = TCL_OK, unmounted = 0; + + WriteLock(); + if (!ZipFS.initialized) { + goto done; + } + + /* + * Mount point sometimes is a relative or otherwise denormalized path. + * But an absolute name is needed as mount point here. + */ + + Tcl_DStringInit(&dsm); + mountPoint = CanonicalPath("", mountPoint, &dsm, 1); + + hPtr = Tcl_FindHashEntry(&ZipFS.zipHash, mountPoint); + /* don't report no-such-mount as an error */ + if (!hPtr) { + goto done; + } + + zf = (ZipFile *) Tcl_GetHashValue(hPtr); + if (zf->numOpen > 0) { + ZIPFS_ERROR(interp, "filesystem is busy"); + ret = TCL_ERROR; + goto done; + } + Tcl_DeleteHashEntry(hPtr); + for (z = zf->entries; z; z = znext) { + znext = z->next; + hPtr = Tcl_FindHashEntry(&ZipFS.fileHash, z->name); + if (hPtr) { + Tcl_DeleteHashEntry(hPtr); + } + if (z->data) { + ckfree(z->data); + } + ckfree(z); + } + ZipFSCloseArchive(interp, zf); + Tcl_DeleteExitHandler(ZipfsExitHandler, zf); + ckfree(zf); + unmounted = 1; + done: + Unlock(); + if (unmounted) { + Tcl_FSMountsChanged(NULL); + } + return ret; +} + +/* + *------------------------------------------------------------------------- + * + * ZipFSMountObjCmd -- + * + * This procedure is invoked to process the [zipfs mount] command. + * + * Results: + * A standard Tcl result. + * + * Side effects: + * A ZIP archive file is mounted, resources are allocated. + * + *------------------------------------------------------------------------- + */ + +static int +ZipFSMountObjCmd( + TCL_UNUSED(ClientData), + Tcl_Interp *interp, /* Current interpreter. */ + int objc, /* Number of arguments. */ + Tcl_Obj *const objv[]) /* Argument objects. */ +{ + const char *mountPoint = NULL, *zipFile = NULL, *password = NULL; + Tcl_Obj *zipFileObj = NULL; + int result; + + if (objc > 4) { + Tcl_WrongNumArgs(interp, 1, objv, + "?mountpoint? ?zipfile? ?password?"); + return TCL_ERROR; + } + if (objc > 1) { + mountPoint = Tcl_GetString(objv[1]); + } + if (objc > 2) { + zipFileObj = Tcl_FSGetNormalizedPath(interp, objv[2]); + if (!zipFileObj) { + Tcl_SetObjResult(interp, Tcl_NewStringObj( + "could not normalize zip filename", -1)); + Tcl_SetErrorCode(interp, "TCL", "OPERATION", "NORMALIZE", NULL); + return TCL_ERROR; + } + Tcl_IncrRefCount(zipFileObj); + zipFile = Tcl_GetString(zipFileObj); + } + if (objc > 3) { + password = Tcl_GetString(objv[3]); + } + + result = TclZipfs_Mount(interp, mountPoint, zipFile, password); + if (zipFileObj != NULL) { + Tcl_DecrRefCount(zipFileObj); + } + return result; +} + +/* + *------------------------------------------------------------------------- + * + * ZipFSMountBufferObjCmd -- + * + * This procedure is invoked to process the [zipfs mount_data] command. + * + * Results: + * A standard Tcl result. + * + * Side effects: + * A ZIP archive file is mounted, resources are allocated. + * + *------------------------------------------------------------------------- + */ + +static int +ZipFSMountBufferObjCmd( + TCL_UNUSED(ClientData), + Tcl_Interp *interp, /* Current interpreter. */ + int objc, /* Number of arguments. */ + Tcl_Obj *const objv[]) /* Argument objects. */ +{ + const char *mountPoint; /* Mount point path. */ + unsigned char *data; + int length; + + if (objc > 3) { + Tcl_WrongNumArgs(interp, 1, objv, "?mountpoint? ?data?"); + return TCL_ERROR; + } + if (objc < 2) { + int ret; + + ReadLock(); + ret = ListMountPoints(interp); + Unlock(); + return ret; + } + + mountPoint = Tcl_GetString(objv[1]); + if (objc < 3) { + ReadLock(); + DescribeMounted(interp, mountPoint); + Unlock(); + return TCL_OK; + } + + data = TclGetBytesFromObj(interp, objv[2], &length); + if (data == NULL) { + return TCL_ERROR; + } + return TclZipfs_MountBuffer(interp, mountPoint, data, length, 1); +} + +/* + *------------------------------------------------------------------------- + * + * ZipFSRootObjCmd -- + * + * This procedure is invoked to process the [zipfs root] command. It + * returns the root that all zipfs file systems are mounted under. + * + * Results: + * A standard Tcl result. + * + * Side effects: + * + *------------------------------------------------------------------------- + */ + +static int +ZipFSRootObjCmd( + TCL_UNUSED(ClientData), + Tcl_Interp *interp, /* Current interpreter. */ + TCL_UNUSED(int) /*objc*/, + TCL_UNUSED(Tcl_Obj *const *)) /*objv*/ +{ + Tcl_SetObjResult(interp, Tcl_NewStringObj(ZIPFS_VOLUME, -1)); + return TCL_OK; +} + +/* + *------------------------------------------------------------------------- + * + * ZipFSUnmountObjCmd -- + * + * This procedure is invoked to process the [zipfs unmount] command. + * + * Results: + * A standard Tcl result. + * + * Side effects: + * A mounted ZIP archive file is unmounted, resources are free'd. + * + *------------------------------------------------------------------------- + */ + +static int +ZipFSUnmountObjCmd( + TCL_UNUSED(ClientData), + Tcl_Interp *interp, /* Current interpreter. */ + int objc, /* Number of arguments. */ + Tcl_Obj *const objv[]) /* Argument objects. */ +{ + + if (objc != 2) { + Tcl_WrongNumArgs(interp, 1, objv, "zipfile"); + return TCL_ERROR; + } + return TclZipfs_Unmount(interp, Tcl_GetString(objv[1])); +} + +/* + *------------------------------------------------------------------------- + * + * ZipFSMkKeyObjCmd -- + * + * This procedure is invoked to process the [zipfs mkkey] command. It + * produces a rotated password to be embedded into an image file. + * + * Results: + * A standard Tcl result. + * + * Side effects: + * None. + * + *------------------------------------------------------------------------- + */ + +static int +ZipFSMkKeyObjCmd( + TCL_UNUSED(ClientData), + Tcl_Interp *interp, /* Current interpreter. */ + int objc, /* Number of arguments. */ + Tcl_Obj *const objv[]) /* Argument objects. */ +{ + int len, i = 0; + char *pw, passBuf[264]; + + if (objc != 2) { + Tcl_WrongNumArgs(interp, 1, objv, "password"); + return TCL_ERROR; + } + pw = Tcl_GetString(objv[1]); + len = strlen(pw); + if (len == 0) { + return TCL_OK; + } + if ((len > 255) || strchr(pw, 0xff)) { + Tcl_SetObjResult(interp, Tcl_NewStringObj("illegal password", -1)); + return TCL_ERROR; + } + while (len > 0) { + int ch = pw[len - 1]; + + passBuf[i] = (ch & 0x0f) | pwrot[(ch >> 4) & 0x0f]; + i++; + len--; + } + passBuf[i] = i; + ++i; + passBuf[i++] = (char) ZIP_PASSWORD_END_SIG; + passBuf[i++] = (char) (ZIP_PASSWORD_END_SIG >> 8); + passBuf[i++] = (char) (ZIP_PASSWORD_END_SIG >> 16); + passBuf[i++] = (char) (ZIP_PASSWORD_END_SIG >> 24); + passBuf[i] = '\0'; + Tcl_AppendResult(interp, passBuf, (char *) NULL); + return TCL_OK; +} + +/* + *------------------------------------------------------------------------- + * + * ZipAddFile -- + * + * This procedure is used by ZipFSMkZipOrImgCmd() to add a single file to + * the output ZIP archive file being written. A ZipEntry struct about the + * input file is added to the given fileHash table for later creation of + * the central ZIP directory. + * + * Results: + * A standard Tcl result. + * + * Side effects: + * Input file is read and (compressed and) written to the output ZIP + * archive file. + * + *------------------------------------------------------------------------- + */ + +static int +ZipAddFile( + Tcl_Interp *interp, /* Current interpreter. */ + const char *path, + const char *name, + Tcl_Channel out, + const char *passwd, /* Password for encoding the file, or NULL if + * the file is to be unprotected. */ + char *buf, + int bufsize, + Tcl_HashTable *fileHash) +{ + Tcl_Channel in; + Tcl_HashEntry *hPtr; + ZipEntry *z; + z_stream stream; + const char *zpath; + int crc, flush, zpathlen; + size_t nbyte, nbytecompr, len, olen, align = 0; + long long headerStartOffset, dataStartOffset, dataEndOffset; + int mtime = 0, isNew, compMeth; + unsigned long keys[3], keys0[3]; + char obuf[4096]; + + /* + * Trim leading '/' characters. If this results in an empty string, we've + * nothing to do. + */ + + zpath = name; + while (zpath && zpath[0] == '/') { + zpath++; + } + if (!zpath || (zpath[0] == '\0')) { + return TCL_OK; + } + + zpathlen = strlen(zpath); + if (zpathlen + ZIP_CENTRAL_HEADER_LEN > bufsize) { + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "path too long for \"%s\"", path)); + Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "PATH_LEN", NULL); + return TCL_ERROR; + } + in = Tcl_OpenFileChannel(interp, path, "rb", 0); + if (!in) { +#ifdef _WIN32 + /* hopefully a directory */ + if (strcmp("permission denied", Tcl_PosixError(interp)) == 0) { + Tcl_Close(interp, in); + return TCL_OK; + } +#endif /* _WIN32 */ + Tcl_Close(interp, in); + return TCL_ERROR; + } else { + Tcl_Obj *pathObj = Tcl_NewStringObj(path, -1); + Tcl_StatBuf statBuf; + + Tcl_IncrRefCount(pathObj); + if (Tcl_FSStat(pathObj, &statBuf) != -1) { + mtime = statBuf.st_mtime; + } + Tcl_DecrRefCount(pathObj); + } + Tcl_ResetResult(interp); + crc = 0; + nbyte = nbytecompr = 0; + while (1) { + len = Tcl_Read(in, buf, bufsize); + if (len == ERROR_LENGTH) { + if (nbyte == 0 && errno == EISDIR) { + Tcl_Close(interp, in); + return TCL_OK; + } + Tcl_SetObjResult(interp, Tcl_ObjPrintf("read error on \"%s\": %s", + path, Tcl_PosixError(interp))); + Tcl_Close(interp, in); + return TCL_ERROR; + } + if (len == 0) { + break; + } + crc = crc32(crc, (unsigned char *) buf, len); + nbyte += len; + } + if (Tcl_Seek(in, 0, SEEK_SET) == -1) { + Tcl_SetObjResult(interp, Tcl_ObjPrintf("seek error on \"%s\": %s", + path, Tcl_PosixError(interp))); + Tcl_Close(interp, in); + return TCL_ERROR; + } + headerStartOffset = Tcl_Tell(out); + memset(buf, '\0', ZIP_LOCAL_HEADER_LEN); + memcpy(buf + ZIP_LOCAL_HEADER_LEN, zpath, zpathlen); + len = zpathlen + ZIP_LOCAL_HEADER_LEN; + if ((size_t) Tcl_Write(out, buf, len) != len) { + wrerr: + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "write error on %s: %s", path, Tcl_PosixError(interp))); + Tcl_Close(interp, in); + return TCL_ERROR; + } + if ((len + headerStartOffset) & 3) { + unsigned char abuf[8]; + + /* + * Align payload to next 4-byte boundary using a dummy extra entry + * similar to the zipalign tool from Android's SDK. + */ + + align = 4 + ((len + headerStartOffset) & 3); + ZipWriteShort(abuf, 0xffff); + ZipWriteShort(abuf + 2, align - 4); + ZipWriteInt(abuf + 4, 0x03020100); + if ((size_t) Tcl_Write(out, (const char *) abuf, align) != align) { + goto wrerr; + } + } + if (passwd) { + int i, ch, tmp; + unsigned char kvbuf[24]; + Tcl_Obj *ret; + + init_keys(passwd, keys, crc32tab); + for (i = 0; i < 12 - 2; i++) { + double r; + + if (Tcl_EvalEx(interp, "::tcl::mathfunc::rand", -1, 0) != TCL_OK) { + Tcl_Obj *eiPtr = Tcl_ObjPrintf( + "\n (evaluating PRNG step %d for password encoding)", + i); + + Tcl_AppendObjToErrorInfo(interp, eiPtr); + Tcl_Close(interp, in); + return TCL_ERROR; + } + ret = Tcl_GetObjResult(interp); + if (Tcl_GetDoubleFromObj(interp, ret, &r) != TCL_OK) { + Tcl_Obj *eiPtr = Tcl_ObjPrintf( + "\n (evaluating PRNG step %d for password encoding)", + i); + + Tcl_AppendObjToErrorInfo(interp, eiPtr); + Tcl_Close(interp, in); + return TCL_ERROR; + } + ch = (int) (r * 256); + kvbuf[i + 12] = UCHAR(zencode(keys, crc32tab, ch, tmp)); + } + Tcl_ResetResult(interp); + init_keys(passwd, keys, crc32tab); + for (i = 0; i < 12 - 2; i++) { + kvbuf[i] = UCHAR(zencode(keys, crc32tab, kvbuf[i + 12], tmp)); + } + kvbuf[i++] = UCHAR(zencode(keys, crc32tab, crc >> 16, tmp)); + kvbuf[i++] = UCHAR(zencode(keys, crc32tab, crc >> 24, tmp)); + len = Tcl_Write(out, (char *) kvbuf, 12); + memset(kvbuf, 0, 24); + if (len != 12) { + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "write error on %s: %s", path, Tcl_PosixError(interp))); + Tcl_Close(interp, in); + return TCL_ERROR; + } + memcpy(keys0, keys, sizeof(keys0)); + nbytecompr += 12; + } + Tcl_Flush(out); + dataStartOffset = Tcl_Tell(out); + compMeth = ZIP_COMPMETH_DEFLATED; + memset(&stream, 0, sizeof(z_stream)); + stream.zalloc = Z_NULL; + stream.zfree = Z_NULL; + stream.opaque = Z_NULL; + if (deflateInit2(&stream, 9, Z_DEFLATED, -15, 8, + Z_DEFAULT_STRATEGY) != Z_OK) { + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "compression init error on \"%s\"", path)); + Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "DEFLATE_INIT", NULL); + Tcl_Close(interp, in); + return TCL_ERROR; + } + do { + len = Tcl_Read(in, buf, bufsize); + if (len == ERROR_LENGTH) { + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "read error on %s: %s", path, Tcl_PosixError(interp))); + deflateEnd(&stream); + Tcl_Close(interp, in); + return TCL_ERROR; + } + stream.avail_in = len; + stream.next_in = (unsigned char *) buf; + flush = Tcl_Eof(in) ? Z_FINISH : Z_NO_FLUSH; + do { + stream.avail_out = sizeof(obuf); + stream.next_out = (unsigned char *) obuf; + len = deflate(&stream, flush); + if (len == (size_t) Z_STREAM_ERROR) { + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "deflate error on %s", path)); + Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "DEFLATE", NULL); + deflateEnd(&stream); + Tcl_Close(interp, in); + return TCL_ERROR; + } + olen = sizeof(obuf) - stream.avail_out; + if (passwd) { + size_t i; + int tmp; + + for (i = 0; i < olen; i++) { + obuf[i] = (char) zencode(keys, crc32tab, obuf[i], tmp); + } + } + if (olen && ((size_t) Tcl_Write(out, obuf, olen) != olen)) { + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "write error: %s", Tcl_PosixError(interp))); + deflateEnd(&stream); + Tcl_Close(interp, in); + return TCL_ERROR; + } + nbytecompr += olen; + } while (stream.avail_out == 0); + } while (flush != Z_FINISH); + deflateEnd(&stream); + Tcl_Flush(out); + dataEndOffset = Tcl_Tell(out); + if (nbyte - nbytecompr <= 0) { + /* + * Compressed file larger than input, write it again uncompressed. + */ + + if (Tcl_Seek(in, 0, SEEK_SET) != 0) { + goto seekErr; + } + if (Tcl_Seek(out, dataStartOffset, SEEK_SET) != dataStartOffset) { + seekErr: + Tcl_Close(interp, in); + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "seek error: %s", Tcl_PosixError(interp))); + return TCL_ERROR; + } + nbytecompr = (passwd ? 12 : 0); + while (1) { + len = Tcl_Read(in, buf, bufsize); + if (len == ERROR_LENGTH) { + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "read error on \"%s\": %s", + path, Tcl_PosixError(interp))); + Tcl_Close(interp, in); + return TCL_ERROR; + } else if (len == 0) { + break; + } + if (passwd) { + size_t i; + int tmp; + + for (i = 0; i < len; i++) { + buf[i] = (char) zencode(keys0, crc32tab, buf[i], tmp); + } + } + if ((size_t) Tcl_Write(out, buf, len) != len) { + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "write error: %s", Tcl_PosixError(interp))); + Tcl_Close(interp, in); + return TCL_ERROR; + } + nbytecompr += len; + } + compMeth = ZIP_COMPMETH_STORED; + Tcl_Flush(out); + dataEndOffset = Tcl_Tell(out); + Tcl_TruncateChannel(out, dataEndOffset); + } + Tcl_Close(interp, in); + + hPtr = Tcl_CreateHashEntry(fileHash, zpath, &isNew); + if (!isNew) { + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "non-unique path name \"%s\"", path)); + Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "DUPLICATE_PATH", NULL); + return TCL_ERROR; + } + + z = (ZipEntry *) ckalloc(sizeof(ZipEntry)); + Tcl_SetHashValue(hPtr, z); + z->name = NULL; + z->tnext = NULL; + z->depth = 0; + z->zipFilePtr = NULL; + z->isDirectory = 0; + z->isEncrypted = (passwd ? 1 : 0); + z->offset = headerStartOffset; + z->crc32 = crc; + z->timestamp = mtime; + z->numBytes = nbyte; + z->numCompressedBytes = nbytecompr; + z->compressMethod = compMeth; + z->data = NULL; + z->name = (char *) Tcl_GetHashKey(fileHash, hPtr); + z->next = NULL; + + /* + * Write final local header information. + */ + + SerializeLocalEntryHeader(buf, z, zpathlen, align); + if (Tcl_Seek(out, headerStartOffset, SEEK_SET) != headerStartOffset) { + Tcl_DeleteHashEntry(hPtr); + ckfree(z); + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "seek error: %s", Tcl_PosixError(interp))); + return TCL_ERROR; + } + if (Tcl_Write(out, buf, ZIP_LOCAL_HEADER_LEN) != ZIP_LOCAL_HEADER_LEN) { + Tcl_DeleteHashEntry(hPtr); + ckfree(z); + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "write error: %s", Tcl_PosixError(interp))); + return TCL_ERROR; + } + Tcl_Flush(out); + if (Tcl_Seek(out, dataEndOffset, SEEK_SET) != dataEndOffset) { + Tcl_DeleteHashEntry(hPtr); + ckfree(z); + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "seek error: %s", Tcl_PosixError(interp))); + return TCL_ERROR; + } + return TCL_OK; +} + +/* + *------------------------------------------------------------------------- + * + * ZipFSMkZipOrImgObjCmd -- + * + * This procedure is creates a new ZIP archive file or image file given + * output filename, input directory of files to be archived, optional + * password, and optional image to be prepended to the output ZIP archive + * file. + * + * Results: + * A standard Tcl result. + * + * Side effects: + * A new ZIP archive file or image file is written. + * + *------------------------------------------------------------------------- + */ + +static int +ZipFSMkZipOrImgObjCmd( + Tcl_Interp *interp, /* Current interpreter. */ + int isImg, + Tcl_Obj *targetFile, + Tcl_Obj *dirRoot, + Tcl_Obj *mappingList, + Tcl_Obj *originFile, + Tcl_Obj *stripPrefix, + Tcl_Obj *passwordObj) +{ + Tcl_Channel out; + int pwlen = 0, slen = 0, count, ret = TCL_ERROR, lobjc; + size_t len, i = 0; + long long dataStartOffset; /* The overall file offset of the start of the + * data section of the file. */ + long long directoryStartOffset; + /* The overall file offset of the start of the + * central directory. */ + long long suffixStartOffset;/* The overall file offset of the start of the + * suffix of the central directory (i.e., + * where this data will be written). */ + Tcl_Obj **lobjv, *list = mappingList; + ZipEntry *z; + Tcl_HashEntry *hPtr; + Tcl_HashSearch search; + Tcl_HashTable fileHash; + char *strip = NULL, *pw = NULL, passBuf[264], buf[4096]; + + /* + * Caller has verified that the number of arguments is correct. + */ + + passBuf[0] = 0; + if (passwordObj != NULL) { + pw = Tcl_GetStringFromObj(passwordObj, &pwlen); + if ((pwlen > 255) || strchr(pw, 0xff)) { + Tcl_SetObjResult(interp, + Tcl_NewStringObj("illegal password", -1)); + Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "BAD_PASS", NULL); + return TCL_ERROR; + } + } + if (dirRoot != NULL) { + Tcl_Obj *cmd[2]; + int result; + + /* + * Discover the list of files to add. + */ + + cmd[0] = Tcl_NewStringObj("::tcl::zipfs::find", -1); + cmd[1] = dirRoot; + Tcl_IncrRefCount(cmd[0]); + result = Tcl_EvalObjv(interp, 2, cmd, 0); + Tcl_DecrRefCount(cmd[0]); + if (result != TCL_OK) { + return TCL_ERROR; + } + list = Tcl_GetObjResult(interp); + } + Tcl_IncrRefCount(list); + if (Tcl_ListObjGetElements(interp, list, &lobjc, &lobjv) != TCL_OK) { + Tcl_DecrRefCount(list); + return TCL_ERROR; + } + if (mappingList && (lobjc % 2)) { + Tcl_DecrRefCount(list); + Tcl_SetObjResult(interp, + Tcl_NewStringObj("need even number of elements", -1)); + Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "LIST_LENGTH", NULL); + return TCL_ERROR; + } + if (lobjc == 0) { + Tcl_DecrRefCount(list); + Tcl_SetObjResult(interp, Tcl_NewStringObj("empty archive", -1)); + Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "EMPTY", NULL); + return TCL_ERROR; + } + out = Tcl_OpenFileChannel(interp, Tcl_GetString(targetFile), "wb", 0755); + if (out == NULL) { + Tcl_DecrRefCount(list); + return TCL_ERROR; + } + if (pwlen <= 0) { + pw = NULL; + pwlen = 0; + } + + /* + * Copy the existing contents from the image if it is an executable image. + * Care must be taken because this might include an existing ZIP, which + * needs to be stripped. + */ + + if (isImg) { + ZipFile *zf, zf0; + int isMounted = 0; + const char *imgName; + + // TODO: normalize the origin file name + imgName = (originFile != NULL) ? Tcl_GetString(originFile) : + Tcl_GetNameOfExecutable(); + if (pwlen) { + i = 0; + for (len = pwlen; len-- > 0;) { + int ch = pw[len]; + + passBuf[i] = (ch & 0x0f) | pwrot[(ch >> 4) & 0x0f]; + i++; + } + passBuf[i] = i; + ++i; + passBuf[i++] = (char) ZIP_PASSWORD_END_SIG; + passBuf[i++] = (char) (ZIP_PASSWORD_END_SIG >> 8); + passBuf[i++] = (char) (ZIP_PASSWORD_END_SIG >> 16); + passBuf[i++] = (char) (ZIP_PASSWORD_END_SIG >> 24); + passBuf[i] = '\0'; + } + + /* + * Check for mounted image. + */ + + WriteLock(); + for (hPtr = Tcl_FirstHashEntry(&ZipFS.zipHash, &search); hPtr; + hPtr = Tcl_NextHashEntry(&search)) { + zf = (ZipFile *) Tcl_GetHashValue(hPtr); + if (strcmp(zf->name, imgName) == 0) { + isMounted = 1; + zf->numOpen++; + break; + } + } + Unlock(); + + if (!isMounted) { + zf = &zf0; + } + if (isMounted || ZipFSOpenArchive(interp, imgName, 0, zf) == TCL_OK) { + /* + * Copy everything up to the ZIP-related suffix. + */ + + if ((size_t) Tcl_Write(out, (char *) zf->data, + zf->passOffset) != zf->passOffset) { + memset(passBuf, 0, sizeof(passBuf)); + Tcl_DecrRefCount(list); + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "write error: %s", Tcl_PosixError(interp))); + Tcl_Close(interp, out); + if (zf == &zf0) { + ZipFSCloseArchive(interp, zf); + } else { + WriteLock(); + zf->numOpen--; + Unlock(); + } + return TCL_ERROR; + } + if (zf == &zf0) { + ZipFSCloseArchive(interp, zf); + } else { + WriteLock(); + zf->numOpen--; + Unlock(); + } + } else { + /* + * Fall back to read it as plain file which hopefully is a static + * tclsh or wish binary with proper zipfs infrastructure built in. + */ + + if (CopyImageFile(interp, imgName, out) != TCL_OK) { + memset(passBuf, 0, sizeof(passBuf)); + Tcl_DecrRefCount(list); + Tcl_Close(interp, out); + return TCL_ERROR; + } + } + + /* + * Store the password so that the automounter can find it. + */ + + len = strlen(passBuf); + if (len > 0) { + i = Tcl_Write(out, passBuf, len); + if (i != len) { + Tcl_DecrRefCount(list); + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "write error: %s", Tcl_PosixError(interp))); + Tcl_Close(interp, out); + return TCL_ERROR; + } + } + memset(passBuf, 0, sizeof(passBuf)); + Tcl_Flush(out); + } + + /* + * Prepare the contents of the ZIP archive. + */ + + Tcl_InitHashTable(&fileHash, TCL_STRING_KEYS); + dataStartOffset = Tcl_Tell(out); + if (mappingList == NULL && stripPrefix != NULL) { + strip = Tcl_GetStringFromObj(stripPrefix, &slen); + } + for (i = 0; i < (size_t) lobjc; i += (mappingList ? 2 : 1)) { + const char *path, *name; + + path = Tcl_GetString(lobjv[i]); + if (mappingList) { + name = Tcl_GetString(lobjv[i + 1]); + } else { + name = path; + if (slen > 0) { + len = strlen(name); + if ((len <= (size_t) slen) || + (strncmp(strip, name, slen) != 0)) { + continue; + } + name += slen; + } + } + while (name[0] == '/') { + ++name; + } + if (name[0] == '\0') { + continue; + } + if (ZipAddFile(interp, path, name, out, pw, buf, sizeof(buf), + &fileHash) != TCL_OK) { + goto done; + } + } + + /* + * Construct the contents of the ZIP central directory. + */ + + directoryStartOffset = Tcl_Tell(out); + count = 0; + for (i = 0; i < (size_t) lobjc; i += (mappingList ? 2 : 1)) { + const char *path, *name; + + path = Tcl_GetString(lobjv[i]); + if (mappingList) { + name = Tcl_GetString(lobjv[i + 1]); + } else { + name = path; + if (slen > 0) { + len = strlen(name); + if ((len <= (size_t) slen) || + (strncmp(strip, name, slen) != 0)) { + continue; + } + name += slen; + } + } + while (name[0] == '/') { + ++name; + } + if (name[0] == '\0') { + continue; + } + hPtr = Tcl_FindHashEntry(&fileHash, name); + if (!hPtr) { + continue; + } + z = (ZipEntry *) Tcl_GetHashValue(hPtr); + len = strlen(z->name); + SerializeCentralDirectoryEntry(buf, z, len, dataStartOffset); + if ((Tcl_Write(out, buf, ZIP_CENTRAL_HEADER_LEN) + != ZIP_CENTRAL_HEADER_LEN) + || ((size_t) Tcl_Write(out, z->name, len) != len)) { + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "write error: %s", Tcl_PosixError(interp))); + goto done; + } + count++; + } + + /* + * Finalize the central directory. + */ + + Tcl_Flush(out); + suffixStartOffset = Tcl_Tell(out); + SerializeCentralDirectorySuffix(buf, count, dataStartOffset, + directoryStartOffset, suffixStartOffset); + if (Tcl_Write(out, buf, ZIP_CENTRAL_END_LEN) != ZIP_CENTRAL_END_LEN) { + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "write error: %s", Tcl_PosixError(interp))); + goto done; + } + Tcl_Flush(out); + ret = TCL_OK; + + done: + if (ret == TCL_OK) { + ret = Tcl_Close(interp, out); + } else { + Tcl_Close(interp, out); + } + Tcl_DecrRefCount(list); + for (hPtr = Tcl_FirstHashEntry(&fileHash, &search); hPtr; + hPtr = Tcl_NextHashEntry(&search)) { + z = (ZipEntry *) Tcl_GetHashValue(hPtr); + ckfree(z); + Tcl_DeleteHashEntry(hPtr); + } + Tcl_DeleteHashTable(&fileHash); + return ret; +} + +/* + * --------------------------------------------------------------------- + * + * CopyImageFile -- + * + * A simple file copy function that is used (by ZipFSMkZipOrImgObjCmd) + * for anything that is not an image with a ZIP appended. + * + * Returns: + * A Tcl result code. + * + * Side effects: + * Writes to an output channel. + * + * --------------------------------------------------------------------- + */ + +static int +CopyImageFile( + Tcl_Interp *interp, /* For error reporting. */ + const char *imgName, /* Where to copy from. */ + Tcl_Channel out) /* Where to copy to; already open for writing + * binary data. */ +{ + size_t i, k; + int m, n; + Tcl_Channel in; + char buf[4096]; + const char *errMsg; + + Tcl_ResetResult(interp); + in = Tcl_OpenFileChannel(interp, imgName, "rb", 0644); + if (!in) { + return TCL_ERROR; + } + + /* + * Get the length of the file (and exclude non-files). + */ + + i = Tcl_Seek(in, 0, SEEK_END); + if (i == ERROR_LENGTH) { + errMsg = "seek error"; + goto copyError; + } + Tcl_Seek(in, 0, SEEK_SET); + + /* + * Copy the whole file, 8 blocks at a time (reasonably efficient). Note + * that this totally ignores things like Windows's Alternate File Streams. + */ + + for (k = 0; k < i; k += m) { + m = i - k; + if (m > (int) sizeof(buf)) { + m = (int) sizeof(buf); + } + n = Tcl_Read(in, buf, m); + if (n == -1) { + errMsg = "read error"; + goto copyError; + } else if (n == 0) { + break; + } + m = Tcl_Write(out, buf, n); + if (m != n) { + errMsg = "write error"; + goto copyError; + } + } + Tcl_Close(interp, in); + return TCL_OK; + + copyError: + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "%s: %s", errMsg, Tcl_PosixError(interp))); + Tcl_Close(interp, in); + return TCL_ERROR; +} + +/* + * --------------------------------------------------------------------- + * + * SerializeLocalEntryHeader, SerializeCentralDirectoryEntry, + * SerializeCentralDirectorySuffix -- + * + * Create serialized forms of the structures that make up the ZIP + * metadata. Note that the both the local entry and the central directory + * entry need to have the name of the entry written directly afterwards. + * + * We could write these as structs except we need to guarantee that we + * are writing these out as little-endian values. + * + * Side effects: + * Both update their buffer arguments, but otherwise change nothing. + * + * --------------------------------------------------------------------- + */ + +static void +SerializeLocalEntryHeader( + char *buf, /* Where to serialize to */ + ZipEntry *z, /* The description of what to serialize. */ + int nameLength, /* The length of the name. */ + int align) /* The number of alignment bytes. */ +{ + ZipWriteInt(buf + ZIP_LOCAL_SIG_OFFS, ZIP_LOCAL_HEADER_SIG); + ZipWriteShort(buf + ZIP_LOCAL_VERSION_OFFS, ZIP_MIN_VERSION); + ZipWriteShort(buf + ZIP_LOCAL_FLAGS_OFFS, z->isEncrypted); + ZipWriteShort(buf + ZIP_LOCAL_COMPMETH_OFFS, z->compressMethod); + ZipWriteShort(buf + ZIP_LOCAL_MTIME_OFFS, ToDosTime(z->timestamp)); + ZipWriteShort(buf + ZIP_LOCAL_MDATE_OFFS, ToDosDate(z->timestamp)); + ZipWriteInt(buf + ZIP_LOCAL_CRC32_OFFS, z->crc32); + ZipWriteInt(buf + ZIP_LOCAL_COMPLEN_OFFS, z->numCompressedBytes); + ZipWriteInt(buf + ZIP_LOCAL_UNCOMPLEN_OFFS, z->numBytes); + ZipWriteShort(buf + ZIP_LOCAL_PATHLEN_OFFS, nameLength); + ZipWriteShort(buf + ZIP_LOCAL_EXTRALEN_OFFS, align); +} + +static void +SerializeCentralDirectoryEntry( + char *buf, /* Where to serialize to */ + ZipEntry *z, /* The description of what to serialize. */ + size_t nameLength, /* The length of the name. */ + long long dataStartOffset) /* The overall file offset of the start of the + * data section of the file. */ +{ + ZipWriteInt(buf + ZIP_CENTRAL_SIG_OFFS, ZIP_CENTRAL_HEADER_SIG); + ZipWriteShort(buf + ZIP_CENTRAL_VERSIONMADE_OFFS, ZIP_MIN_VERSION); + ZipWriteShort(buf + ZIP_CENTRAL_VERSION_OFFS, ZIP_MIN_VERSION); + ZipWriteShort(buf + ZIP_CENTRAL_FLAGS_OFFS, z->isEncrypted); + ZipWriteShort(buf + ZIP_CENTRAL_COMPMETH_OFFS, z->compressMethod); + ZipWriteShort(buf + ZIP_CENTRAL_MTIME_OFFS, ToDosTime(z->timestamp)); + ZipWriteShort(buf + ZIP_CENTRAL_MDATE_OFFS, ToDosDate(z->timestamp)); + ZipWriteInt(buf + ZIP_CENTRAL_CRC32_OFFS, z->crc32); + ZipWriteInt(buf + ZIP_CENTRAL_COMPLEN_OFFS, z->numCompressedBytes); + ZipWriteInt(buf + ZIP_CENTRAL_UNCOMPLEN_OFFS, z->numBytes); + ZipWriteShort(buf + ZIP_CENTRAL_PATHLEN_OFFS, nameLength); + ZipWriteShort(buf + ZIP_CENTRAL_EXTRALEN_OFFS, 0); + ZipWriteShort(buf + ZIP_CENTRAL_FCOMMENTLEN_OFFS, 0); + ZipWriteShort(buf + ZIP_CENTRAL_DISKFILE_OFFS, 0); + ZipWriteShort(buf + ZIP_CENTRAL_IATTR_OFFS, 0); + ZipWriteInt(buf + ZIP_CENTRAL_EATTR_OFFS, 0); + ZipWriteInt(buf + ZIP_CENTRAL_LOCALHDR_OFFS, z->offset - dataStartOffset); +} + +static void +SerializeCentralDirectorySuffix( + char *buf, /* Where to serialize to */ + int entryCount, /* The number of entries in the directory */ + long long dataStartOffset, /* The overall file offset of the start of the + * data section of the file. */ + long long directoryStartOffset, + /* The overall file offset of the start of the + * central directory. */ + long long suffixStartOffset)/* The overall file offset of the start of the + * suffix of the central directory (i.e., + * where this data will be written). */ +{ + ZipWriteInt(buf + ZIP_CENTRAL_END_SIG_OFFS, ZIP_CENTRAL_END_SIG); + ZipWriteShort(buf + ZIP_CENTRAL_DISKNO_OFFS, 0); + ZipWriteShort(buf + ZIP_CENTRAL_DISKDIR_OFFS, 0); + ZipWriteShort(buf + ZIP_CENTRAL_ENTS_OFFS, entryCount); + ZipWriteShort(buf + ZIP_CENTRAL_TOTALENTS_OFFS, entryCount); + ZipWriteInt(buf + ZIP_CENTRAL_DIRSIZE_OFFS, + suffixStartOffset - directoryStartOffset); + ZipWriteInt(buf + ZIP_CENTRAL_DIRSTART_OFFS, + directoryStartOffset - dataStartOffset); + ZipWriteShort(buf + ZIP_CENTRAL_COMMENTLEN_OFFS, 0); +} + +/* + *------------------------------------------------------------------------- + * + * ZipFSMkZipObjCmd, ZipFSLMkZipObjCmd -- + * + * These procedures are invoked to process the [zipfs mkzip] and [zipfs + * lmkzip] commands. See description of ZipFSMkZipOrImgCmd(). + * + * Results: + * A standard Tcl result. + * + * Side effects: + * See description of ZipFSMkZipOrImgCmd(). + * + *------------------------------------------------------------------------- + */ + +static int +ZipFSMkZipObjCmd( + TCL_UNUSED(ClientData), + Tcl_Interp *interp, /* Current interpreter. */ + int objc, /* Number of arguments. */ + Tcl_Obj *const objv[]) /* Argument objects. */ +{ + Tcl_Obj *stripPrefix, *password; + + if (objc < 3 || objc > 5) { + Tcl_WrongNumArgs(interp, 1, objv, "outfile indir ?strip? ?password?"); + return TCL_ERROR; + } + if (Tcl_IsSafe(interp)) { + Tcl_SetObjResult(interp, Tcl_NewStringObj( + "operation not permitted in a safe interpreter", -1)); + Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "SAFE_INTERP", NULL); + return TCL_ERROR; + } + + stripPrefix = (objc > 3 ? objv[3] : NULL); + password = (objc > 4 ? objv[4] : NULL); + return ZipFSMkZipOrImgObjCmd(interp, 0, objv[1], objv[2], NULL, NULL, + stripPrefix, password); +} + +static int +ZipFSLMkZipObjCmd( + TCL_UNUSED(ClientData), + Tcl_Interp *interp, /* Current interpreter. */ + int objc, /* Number of arguments. */ + Tcl_Obj *const objv[]) /* Argument objects. */ +{ + Tcl_Obj *password; + + if (objc < 3 || objc > 4) { + Tcl_WrongNumArgs(interp, 1, objv, "outfile inlist ?password?"); + return TCL_ERROR; + } + if (Tcl_IsSafe(interp)) { + Tcl_SetObjResult(interp, Tcl_NewStringObj( + "operation not permitted in a safe interpreter", -1)); + Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "SAFE_INTERP", NULL); + return TCL_ERROR; + } + + password = (objc > 3 ? objv[3] : NULL); + return ZipFSMkZipOrImgObjCmd(interp, 0, objv[1], NULL, objv[2], NULL, + NULL, password); +} + +/* + *------------------------------------------------------------------------- + * + * ZipFSMkImgObjCmd, ZipFSLMkImgObjCmd -- + * + * These procedures are invoked to process the [zipfs mkimg] and [zipfs + * lmkimg] commands. See description of ZipFSMkZipOrImgCmd(). + * + * Results: + * A standard Tcl result. + * + * Side effects: + * See description of ZipFSMkZipOrImgCmd(). + * + *------------------------------------------------------------------------- + */ + +static int +ZipFSMkImgObjCmd( + TCL_UNUSED(ClientData), + Tcl_Interp *interp, /* Current interpreter. */ + int objc, /* Number of arguments. */ + Tcl_Obj *const objv[]) /* Argument objects. */ +{ + Tcl_Obj *originFile, *stripPrefix, *password; + + if (objc < 3 || objc > 6) { + Tcl_WrongNumArgs(interp, 1, objv, + "outfile indir ?strip? ?password? ?infile?"); + return TCL_ERROR; + } + if (Tcl_IsSafe(interp)) { + Tcl_SetObjResult(interp, Tcl_NewStringObj( + "operation not permitted in a safe interpreter", -1)); + Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "SAFE_INTERP", NULL); + return TCL_ERROR; + } + + originFile = (objc > 5 ? objv[5] : NULL); + stripPrefix = (objc > 3 ? objv[3] : NULL); + password = (objc > 4 ? objv[4] : NULL); + return ZipFSMkZipOrImgObjCmd(interp, 1, objv[1], objv[2], NULL, + originFile, stripPrefix, password); +} + +static int +ZipFSLMkImgObjCmd( + TCL_UNUSED(ClientData), + Tcl_Interp *interp, /* Current interpreter. */ + int objc, /* Number of arguments. */ + Tcl_Obj *const objv[]) /* Argument objects. */ +{ + Tcl_Obj *originFile, *password; + + if (objc < 3 || objc > 5) { + Tcl_WrongNumArgs(interp, 1, objv, "outfile inlist ?password infile?"); + return TCL_ERROR; + } + if (Tcl_IsSafe(interp)) { + Tcl_SetObjResult(interp, Tcl_NewStringObj( + "operation not permitted in a safe interpreter", -1)); + Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "SAFE_INTERP", NULL); + return TCL_ERROR; + } + + originFile = (objc > 4 ? objv[4] : NULL); + password = (objc > 3 ? objv[3] : NULL); + return ZipFSMkZipOrImgObjCmd(interp, 1, objv[1], NULL, objv[2], + originFile, NULL, password); +} + +/* + *------------------------------------------------------------------------- + * + * ZipFSCanonicalObjCmd -- + * + * This procedure is invoked to process the [zipfs canonical] command. + * It returns the canonical name for a file within zipfs + * + * Results: + * Always TCL_OK provided the right number of arguments are supplied. + * + * Side effects: + * None. + * + *------------------------------------------------------------------------- + */ + +static int +ZipFSCanonicalObjCmd( + TCL_UNUSED(ClientData), + Tcl_Interp *interp, /* Current interpreter. */ + int objc, /* Number of arguments. */ + Tcl_Obj *const objv[]) /* Argument objects. */ +{ + char *mntpoint = NULL; + char *filename = NULL; + char *result; + Tcl_DString dPath; + + if (objc < 2 || objc > 4) { + Tcl_WrongNumArgs(interp, 1, objv, "?mountpoint? filename ?inZipfs?"); + return TCL_ERROR; + } + Tcl_DStringInit(&dPath); + if (objc == 2) { + filename = Tcl_GetString(objv[1]); + result = CanonicalPath("", filename, &dPath, 1); + } else if (objc == 3) { + mntpoint = Tcl_GetString(objv[1]); + filename = Tcl_GetString(objv[2]); + result = CanonicalPath(mntpoint, filename, &dPath, 1); + } else { + int zipfs = 0; + + if (Tcl_GetBooleanFromObj(interp, objv[3], &zipfs)) { + return TCL_ERROR; + } + mntpoint = Tcl_GetString(objv[1]); + filename = Tcl_GetString(objv[2]); + result = CanonicalPath(mntpoint, filename, &dPath, zipfs); + } + Tcl_SetObjResult(interp, Tcl_NewStringObj(result, -1)); + return TCL_OK; +} + +/* + *------------------------------------------------------------------------- + * + * ZipFSExistsObjCmd -- + * + * This procedure is invoked to process the [zipfs exists] command. It + * tests for the existence of a file in the ZIP filesystem and places a + * boolean into the interp's result. + * + * Results: + * Always TCL_OK provided the right number of arguments are supplied. + * + * Side effects: + * None. + * + *------------------------------------------------------------------------- + */ + +static int +ZipFSExistsObjCmd( + TCL_UNUSED(ClientData), + Tcl_Interp *interp, /* Current interpreter. */ + int objc, /* Number of arguments. */ + Tcl_Obj *const objv[]) /* Argument objects. */ +{ + char *filename; + int exists; + Tcl_DString ds; + + if (objc != 2) { + Tcl_WrongNumArgs(interp, 1, objv, "filename"); + return TCL_ERROR; + } + + /* + * Prepend ZIPFS_VOLUME to filename, eliding the final / + */ + + filename = Tcl_GetString(objv[1]); + Tcl_DStringInit(&ds); + Tcl_DStringAppend(&ds, ZIPFS_VOLUME, ZIPFS_VOLUME_LEN - 1); + Tcl_DStringAppend(&ds, filename, -1); + filename = Tcl_DStringValue(&ds); + + ReadLock(); + exists = ZipFSLookup(filename) != NULL; + Unlock(); + + Tcl_SetObjResult(interp, Tcl_NewBooleanObj(exists)); + return TCL_OK; +} + +/* + *------------------------------------------------------------------------- + * + * ZipFSInfoObjCmd -- + * + * This procedure is invoked to process the [zipfs info] command. On + * success, it returns a Tcl list made up of name of ZIP archive file, + * size uncompressed, size compressed, and archive offset of a file in + * the ZIP filesystem. + * + * Results: + * A standard Tcl result. + * + * Side effects: + * None. + * + *------------------------------------------------------------------------- + */ + +static int +ZipFSInfoObjCmd( + TCL_UNUSED(ClientData), + Tcl_Interp *interp, /* Current interpreter. */ + int objc, /* Number of arguments. */ + Tcl_Obj *const objv[]) /* Argument objects. */ +{ + char *filename; + ZipEntry *z; + + if (objc != 2) { + Tcl_WrongNumArgs(interp, 1, objv, "filename"); + return TCL_ERROR; + } + filename = Tcl_GetString(objv[1]); + ReadLock(); + z = ZipFSLookup(filename); + if (z) { + Tcl_Obj *result = Tcl_GetObjResult(interp); + + Tcl_ListObjAppendElement(interp, result, + Tcl_NewStringObj(z->zipFilePtr->name, -1)); + Tcl_ListObjAppendElement(interp, result, + Tcl_NewWideIntObj(z->numBytes)); + Tcl_ListObjAppendElement(interp, result, + Tcl_NewWideIntObj(z->numCompressedBytes)); + Tcl_ListObjAppendElement(interp, result, Tcl_NewWideIntObj(z->offset)); + } + Unlock(); + return TCL_OK; +} + +/* + *------------------------------------------------------------------------- + * + * ZipFSListObjCmd -- + * + * This procedure is invoked to process the [zipfs list] command. On + * success, it returns a Tcl list of files of the ZIP filesystem which + * match a search pattern (glob or regexp). + * + * Results: + * A standard Tcl result. + * + * Side effects: + * None. + * + *------------------------------------------------------------------------- + */ + +static int +ZipFSListObjCmd( + TCL_UNUSED(ClientData), + Tcl_Interp *interp, /* Current interpreter. */ + int objc, /* Number of arguments. */ + Tcl_Obj *const objv[]) /* Argument objects. */ +{ + char *pattern = NULL; + Tcl_RegExp regexp = NULL; + Tcl_HashEntry *hPtr; + Tcl_HashSearch search; + Tcl_Obj *result = Tcl_GetObjResult(interp); + + if (objc > 3) { + Tcl_WrongNumArgs(interp, 1, objv, "?(-glob|-regexp)? ?pattern?"); + return TCL_ERROR; + } + if (objc == 3) { + int n; + char *what = Tcl_GetStringFromObj(objv[1], &n); + + if ((n >= 2) && (strncmp(what, "-glob", n) == 0)) { + pattern = Tcl_GetString(objv[2]); + } else if ((n >= 2) && (strncmp(what, "-regexp", n) == 0)) { + regexp = Tcl_RegExpCompile(interp, Tcl_GetString(objv[2])); + if (!regexp) { + return TCL_ERROR; + } + } else { + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "unknown option \"%s\"", what)); + Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "BAD_OPT", NULL); + return TCL_ERROR; + } + } else if (objc == 2) { + pattern = Tcl_GetString(objv[1]); + } + ReadLock(); + if (pattern) { + for (hPtr = Tcl_FirstHashEntry(&ZipFS.fileHash, &search); + hPtr != NULL; hPtr = Tcl_NextHashEntry(&search)) { + ZipEntry *z = (ZipEntry *) Tcl_GetHashValue(hPtr); + + if (Tcl_StringMatch(z->name, pattern)) { + Tcl_ListObjAppendElement(interp, result, + Tcl_NewStringObj(z->name, -1)); + } + } + } else if (regexp) { + for (hPtr = Tcl_FirstHashEntry(&ZipFS.fileHash, &search); + hPtr; hPtr = Tcl_NextHashEntry(&search)) { + ZipEntry *z = (ZipEntry *) Tcl_GetHashValue(hPtr); + + if (Tcl_RegExpExec(interp, regexp, z->name, z->name)) { + Tcl_ListObjAppendElement(interp, result, + Tcl_NewStringObj(z->name, -1)); + } + } + } else { + for (hPtr = Tcl_FirstHashEntry(&ZipFS.fileHash, &search); + hPtr; hPtr = Tcl_NextHashEntry(&search)) { + ZipEntry *z = (ZipEntry *) Tcl_GetHashValue(hPtr); + + Tcl_ListObjAppendElement(interp, result, + Tcl_NewStringObj(z->name, -1)); + } + } + Unlock(); + return TCL_OK; +} + +/* + *------------------------------------------------------------------------- + * + * TclZipfs_TclLibrary -- + * + * This procedure gets (and possibly finds) the root that Tcl's library + * files are mounted under. + * + * Results: + * A Tcl object holding the location (with zero refcount), or NULL if no + * Tcl library can be found. + * + * Side effects: + * May initialise the cache of where such library files are to be found. + * This cache is never cleared. + * + *------------------------------------------------------------------------- + */ + +Tcl_Obj * +TclZipfs_TclLibrary(void) +{ + Tcl_Obj *vfsInitScript; + int found; +#if (defined(_WIN32) || defined(__CYGWIN__)) && !defined(STATIC_BUILD) +# define LIBRARY_SIZE 64 + HMODULE hModule; + WCHAR wName[MAX_PATH + LIBRARY_SIZE]; + char dllName[(MAX_PATH + LIBRARY_SIZE) * 3]; +#endif /* _WIN32 */ + + /* + * Use the cached value if that has been set; we don't want to repeat the + * searching and mounting. + */ + + if (zipfs_literal_tcl_library) { + return Tcl_NewStringObj(zipfs_literal_tcl_library, -1); + } + + /* + * Look for the library file system within the executable. + */ + + vfsInitScript = Tcl_NewStringObj(ZIPFS_APP_MOUNT "/tcl_library/init.tcl", + -1); + Tcl_IncrRefCount(vfsInitScript); + found = Tcl_FSAccess(vfsInitScript, F_OK); + Tcl_DecrRefCount(vfsInitScript); + if (found == TCL_OK) { + zipfs_literal_tcl_library = ZIPFS_APP_MOUNT "/tcl_library"; + return Tcl_NewStringObj(zipfs_literal_tcl_library, -1); + } + + /* + * Look for the library file system within the DLL/shared library. Note + * that we must mount the zip file and dll before releasing to search. + */ + +#if !defined(STATIC_BUILD) +#if defined(_WIN32) || defined(__CYGWIN__) + hModule = TclWinGetTclInstance(); + GetModuleFileNameW(hModule, wName, MAX_PATH); +#ifdef __CYGWIN__ + cygwin_conv_path(3, wName, dllName, sizeof(dllName)); +#else + WideCharToMultiByte(CP_UTF8, 0, wName, -1, dllName, sizeof(dllName), NULL, NULL); +#endif + + if (ZipfsAppHookFindTclInit(dllName) == TCL_OK) { + return Tcl_NewStringObj(zipfs_literal_tcl_library, -1); + } +#else + if (ZipfsAppHookFindTclInit(CFG_RUNTIME_LIBDIR "/" CFG_RUNTIME_DLLFILE) == TCL_OK) { + return Tcl_NewStringObj(zipfs_literal_tcl_library, -1); + } +#endif /* _WIN32 */ +#endif /* !defined(STATIC_BUILD) */ + + /* + * If anything set the cache (but subsequently failed) go with that + * anyway. + */ + + if (zipfs_literal_tcl_library) { + return Tcl_NewStringObj(zipfs_literal_tcl_library, -1); + } + return NULL; +} + +/* + *------------------------------------------------------------------------- + * + * ZipFSTclLibraryObjCmd -- + * + * This procedure is invoked to process the + * [::tcl::zipfs::tcl_library_init] command, usually called during the + * execution of Tcl's interpreter startup. It returns the root that Tcl's + * library files are mounted under. + * + * Results: + * A standard Tcl result. + * + * Side effects: + * May initialise the cache of where such library files are to be found. + * This cache is never cleared. + * + *------------------------------------------------------------------------- + */ + +static int +ZipFSTclLibraryObjCmd( + TCL_UNUSED(ClientData), + Tcl_Interp *interp, /* Current interpreter. */ + TCL_UNUSED(int) /*objc*/, + TCL_UNUSED(Tcl_Obj *const *)) /*objv*/ +{ + if (!Tcl_IsSafe(interp)) { + Tcl_Obj *pResult = TclZipfs_TclLibrary(); + + if (!pResult) { + TclNewObj(pResult); + } + Tcl_SetObjResult(interp, pResult); + } + return TCL_OK; +} + +/* + *------------------------------------------------------------------------- + * + * ZipChannelClose -- + * + * This function is called to close a channel. + * + * Results: + * Always TCL_OK. + * + * Side effects: + * Resources are free'd. + * + *------------------------------------------------------------------------- + */ + +static int +ZipChannelClose( + void *instanceData, + TCL_UNUSED(Tcl_Interp *), + int flags) +{ + ZipChannel *info = (ZipChannel *) instanceData; + + if ((flags & (TCL_CLOSE_READ | TCL_CLOSE_WRITE)) != 0) { + return EINVAL; + } + + if (info->iscompr && info->ubuf) { + ckfree(info->ubuf); + info->ubuf = NULL; + } + if (info->isEncrypted) { + info->isEncrypted = 0; + memset(info->keys, 0, sizeof(info->keys)); + } + if (info->isWriting) { + ZipEntry *z = info->zipEntryPtr; + unsigned char *newdata = (unsigned char *) + attemptckrealloc(info->ubuf, info->numRead); + + if (newdata) { + if (z->data) { + ckfree(z->data); + } + z->data = newdata; + z->numBytes = z->numCompressedBytes = info->numBytes; + z->compressMethod = ZIP_COMPMETH_STORED; + z->timestamp = time(NULL); + z->isDirectory = 0; + z->isEncrypted = 0; + z->offset = 0; + z->crc32 = 0; + } else { + ckfree(info->ubuf); + } + } + WriteLock(); + info->zipFilePtr->numOpen--; + Unlock(); + ckfree(info); + return TCL_OK; +} + +/* + *------------------------------------------------------------------------- + * + * ZipChannelRead -- + * + * This function is called to read data from channel. + * + * Results: + * Number of bytes read or -1 on error with error number set. + * + * Side effects: + * Data is read and file pointer is advanced. + * + *------------------------------------------------------------------------- + */ + +static int +ZipChannelRead( + void *instanceData, + char *buf, + int toRead, + int *errloc) +{ + ZipChannel *info = (ZipChannel *) instanceData; + unsigned long nextpos; + + if (info->isDirectory < 0) { + /* + * Special case: when executable combined with ZIP archive file read + * data in front of ZIP, i.e. the executable itself. + */ + + nextpos = info->numRead + toRead; + if (nextpos > info->zipFilePtr->baseOffset) { + toRead = info->zipFilePtr->baseOffset - info->numRead; + nextpos = info->zipFilePtr->baseOffset; + } + if (toRead == 0) { + return 0; + } + memcpy(buf, info->zipFilePtr->data, toRead); + info->numRead = nextpos; + *errloc = 0; + return toRead; + } + if (info->isDirectory) { + *errloc = EISDIR; + return -1; + } + nextpos = info->numRead + toRead; + if (nextpos > info->numBytes) { + toRead = info->numBytes - info->numRead; + nextpos = info->numBytes; + } + if (toRead == 0) { + return 0; + } + if (info->isEncrypted) { + int i; + + for (i = 0; i < toRead; i++) { + int ch = info->ubuf[i + info->numRead]; + + buf[i] = zdecode(info->keys, crc32tab, ch); + } + } else { + memcpy(buf, info->ubuf + info->numRead, toRead); + } + info->numRead = nextpos; + *errloc = 0; + return toRead; +} + +/* + *------------------------------------------------------------------------- + * + * ZipChannelWrite -- + * + * This function is called to write data into channel. + * + * Results: + * Number of bytes written or -1 on error with error number set. + * + * Side effects: + * Data is written and file pointer is advanced. + * + *------------------------------------------------------------------------- + */ + +static int +ZipChannelWrite( + void *instanceData, + const char *buf, + int toWrite, + int *errloc) +{ + ZipChannel *info = (ZipChannel *) instanceData; + unsigned long nextpos; + + if (!info->isWriting) { + *errloc = EINVAL; + return -1; + } + nextpos = info->numRead + toWrite; + if (nextpos > info->maxWrite) { + toWrite = info->maxWrite - info->numRead; + nextpos = info->maxWrite; + } + if (toWrite == 0) { + return 0; + } + memcpy(info->ubuf + info->numRead, buf, toWrite); + info->numRead = nextpos; + if (info->numRead > info->numBytes) { + info->numBytes = info->numRead; + } + *errloc = 0; + return toWrite; +} + +/* + *------------------------------------------------------------------------- + * + * ZipChannelSeek/ZipChannelWideSeek -- + * + * This function is called to position file pointer of channel. + * + * Results: + * New file position or -1 on error with error number set. + * + * Side effects: + * File pointer is repositioned according to offset and mode. + * + *------------------------------------------------------------------------- + */ + +static long long +ZipChannelWideSeek( + void *instanceData, + long long offset, + int mode, + int *errloc) +{ + ZipChannel *info = (ZipChannel *) instanceData; + size_t end; + + if (!info->isWriting && (info->isDirectory < 0)) { + /* + * Special case: when executable combined with ZIP archive file, seek + * within front of ZIP, i.e. the executable itself. + */ + end = info->zipFilePtr->baseOffset; + } else if (info->isDirectory) { + *errloc = EINVAL; + return -1; + } else { + end = info->numBytes; + } + switch (mode) { + case SEEK_CUR: + offset += info->numRead; + break; + case SEEK_END: + offset += end; + break; + case SEEK_SET: + break; + default: + *errloc = EINVAL; + return -1; + } + if (offset < 0) { + *errloc = EINVAL; + return -1; + } + if (info->isWriting) { + if ((size_t) offset > info->maxWrite) { + *errloc = EINVAL; + return -1; + } + if ((size_t) offset > info->numBytes) { + info->numBytes = offset; + } + } else if ((size_t) offset > end) { + *errloc = EINVAL; + return -1; + } + info->numRead = (size_t) offset; + return info->numRead; +} + +#ifndef TCL_NO_DEPRECATED +static int +ZipChannelSeek( + void *instanceData, + long offset, + int mode, + int *errloc) +{ + return ZipChannelWideSeek(instanceData, offset, mode, errloc); +} +#endif + +/* + *------------------------------------------------------------------------- + * + * ZipChannelWatchChannel -- + * + * This function is called for event notifications on channel. Does + * nothing. + * + * Results: + * None. + * + * Side effects: + * None. + * + *------------------------------------------------------------------------- + */ + +static void +ZipChannelWatchChannel( + TCL_UNUSED(ClientData), + TCL_UNUSED(int) /*mask*/) +{ + return; +} + +/* + *------------------------------------------------------------------------- + * + * ZipChannelGetFile -- + * + * This function is called to retrieve OS handle for channel. + * + * Results: + * Always TCL_ERROR since there's never an OS handle for a file within a + * ZIP archive. + * + * Side effects: + * None. + * + *------------------------------------------------------------------------- + */ + +static int +ZipChannelGetFile( + TCL_UNUSED(ClientData), + TCL_UNUSED(int) /*direction*/, + TCL_UNUSED(ClientData *) /*handlePtr*/) +{ + return TCL_ERROR; +} + +/* + *------------------------------------------------------------------------- + * + * ZipChannelOpen -- + * + * This function opens a Tcl_Channel on a file from a mounted ZIP archive + * according to given open mode. + * + * Results: + * Tcl_Channel on success, or NULL on error. + * + * Side effects: + * Memory is allocated, the file from the ZIP archive is uncompressed. + * + *------------------------------------------------------------------------- + */ + +static Tcl_Channel +ZipChannelOpen( + Tcl_Interp *interp, /* Current interpreter. */ + char *filename, + int mode, + TCL_UNUSED(int) /*permissions*/) +{ + ZipEntry *z; + ZipChannel *info; + int i, ch, trunc, wr, flags = 0; + char cname[128]; + + if ((mode & O_APPEND) + || ((ZipFS.wrmax <= 0) && (mode & (O_WRONLY | O_RDWR)))) { + if (interp) { + Tcl_SetObjResult(interp, + Tcl_NewStringObj("unsupported open mode", -1)); + Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "BAD_MODE", NULL); + } + return NULL; + } + WriteLock(); + z = ZipFSLookup(filename); + if (!z) { + Tcl_SetErrno(ENOENT); + if (interp) { + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "file not found \"%s\": %s", filename, + Tcl_PosixError(interp))); + } + goto error; + } + trunc = (mode & O_TRUNC) != 0; + wr = (mode & (O_WRONLY | O_RDWR)) != 0; + if ((z->compressMethod != ZIP_COMPMETH_STORED) + && (z->compressMethod != ZIP_COMPMETH_DEFLATED)) { + ZIPFS_ERROR(interp, "unsupported compression method"); + if (interp) { + Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "COMP_METHOD", NULL); + } + goto error; + } + if (wr && z->isDirectory) { + ZIPFS_ERROR(interp, "unsupported file type"); + if (interp) { + Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "FILE_TYPE", NULL); + } + goto error; + } + if (!trunc) { + flags |= TCL_READABLE; + if (z->isEncrypted && (z->zipFilePtr->passBuf[0] == 0)) { + ZIPFS_ERROR(interp, "decryption failed"); + if (interp) { + Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "DECRYPT", NULL); + } + goto error; + } else if (wr && !z->data && (z->numBytes > ZipFS.wrmax)) { + ZIPFS_ERROR(interp, "file too large"); + if (interp) { + Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "FILE_SIZE", NULL); + } + goto error; + } + } else { + flags = TCL_WRITABLE; + } + info = (ZipChannel *) attemptckalloc(sizeof(ZipChannel)); + if (!info) { + ZIPFS_ERROR(interp, "out of memory"); + if (interp) { + Tcl_SetErrorCode(interp, "TCL", "MALLOC", NULL); + } + goto error; + } + info->zipFilePtr = z->zipFilePtr; + info->zipEntryPtr = z; + info->numRead = 0; + if (wr) { + flags |= TCL_WRITABLE; + info->isWriting = 1; + info->isDirectory = 0; + info->maxWrite = ZipFS.wrmax; + info->iscompr = 0; + info->isEncrypted = 0; + info->ubuf = (unsigned char *) attemptckalloc(info->maxWrite); + if (!info->ubuf) { + merror0: + if (info->ubuf) { + ckfree(info->ubuf); + } + ckfree(info); + ZIPFS_ERROR(interp, "out of memory"); + if (interp) { + Tcl_SetErrorCode(interp, "TCL", "MALLOC", NULL); + } + goto error; + } + memset(info->ubuf, 0, info->maxWrite); + if (trunc) { + info->numBytes = 0; + } else if (z->data) { + unsigned int j = z->numBytes; + + if (j > info->maxWrite) { + j = info->maxWrite; + } + memcpy(info->ubuf, z->data, j); + info->numBytes = j; + } else { + unsigned char *zbuf = z->zipFilePtr->data + z->offset; + + if (z->isEncrypted) { + int len = z->zipFilePtr->passBuf[0] & 0xFF; + char passBuf[260]; + + for (i = 0; i < len; i++) { + ch = z->zipFilePtr->passBuf[len - i]; + passBuf[i] = (ch & 0x0f) | pwrot[(ch >> 4) & 0x0f]; + } + passBuf[i] = '\0'; + init_keys(passBuf, info->keys, crc32tab); + memset(passBuf, 0, sizeof(passBuf)); + for (i = 0; i < 12; i++) { + ch = info->ubuf[i]; + zdecode(info->keys, crc32tab, ch); + } + zbuf += i; + } + if (z->compressMethod == ZIP_COMPMETH_DEFLATED) { + z_stream stream; + int err; + unsigned char *cbuf = NULL; + + memset(&stream, 0, sizeof(z_stream)); + stream.zalloc = Z_NULL; + stream.zfree = Z_NULL; + stream.opaque = Z_NULL; + stream.avail_in = z->numCompressedBytes; + if (z->isEncrypted) { + unsigned int j; + + stream.avail_in -= 12; + cbuf = (unsigned char *) attemptckalloc(stream.avail_in); + if (!cbuf) { + goto merror0; + } + for (j = 0; j < stream.avail_in; j++) { + ch = info->ubuf[j]; + cbuf[j] = zdecode(info->keys, crc32tab, ch); + } + stream.next_in = cbuf; + } else { + stream.next_in = zbuf; + } + stream.next_out = info->ubuf; + stream.avail_out = info->maxWrite; + if (inflateInit2(&stream, -15) != Z_OK) { + goto cerror0; + } + err = inflate(&stream, Z_SYNC_FLUSH); + inflateEnd(&stream); + if ((err == Z_STREAM_END) + || ((err == Z_OK) && (stream.avail_in == 0))) { + if (cbuf) { + memset(info->keys, 0, sizeof(info->keys)); + ckfree(cbuf); + } + goto wrapchan; + } + cerror0: + if (cbuf) { + memset(info->keys, 0, sizeof(info->keys)); + ckfree(cbuf); + } + if (info->ubuf) { + ckfree(info->ubuf); + } + ckfree(info); + ZIPFS_ERROR(interp, "decompression error"); + if (interp) { + Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "CORRUPT", NULL); + } + goto error; + } else if (z->isEncrypted) { + for (i = 0; i < z->numBytes - 12; i++) { + ch = zbuf[i]; + info->ubuf[i] = zdecode(info->keys, crc32tab, ch); + } + } else { + memcpy(info->ubuf, zbuf, z->numBytes); + } + memset(info->keys, 0, sizeof(info->keys)); + goto wrapchan; + } + } else if (z->data) { + flags |= TCL_READABLE; + info->isWriting = 0; + info->iscompr = 0; + info->isDirectory = 0; + info->isEncrypted = 0; + info->numBytes = z->numBytes; + info->maxWrite = 0; + info->ubuf = z->data; + } else { + flags |= TCL_READABLE; + info->isWriting = 0; + info->iscompr = (z->compressMethod == ZIP_COMPMETH_DEFLATED); + info->ubuf = z->zipFilePtr->data + z->offset; + info->isDirectory = z->isDirectory; + info->isEncrypted = z->isEncrypted; + info->numBytes = z->numBytes; + info->maxWrite = 0; + if (info->isEncrypted) { + int len = z->zipFilePtr->passBuf[0] & 0xFF; + char passBuf[260]; + + for (i = 0; i < len; i++) { + ch = z->zipFilePtr->passBuf[len - i]; + passBuf[i] = (ch & 0x0f) | pwrot[(ch >> 4) & 0x0f]; + } + passBuf[i] = '\0'; + init_keys(passBuf, info->keys, crc32tab); + memset(passBuf, 0, sizeof(passBuf)); + for (i = 0; i < 12; i++) { + ch = info->ubuf[i]; + zdecode(info->keys, crc32tab, ch); + } + info->ubuf += i; + } + if (info->iscompr) { + z_stream stream; + int err; + unsigned char *ubuf = NULL; + unsigned int j; + + memset(&stream, 0, sizeof(z_stream)); + stream.zalloc = Z_NULL; + stream.zfree = Z_NULL; + stream.opaque = Z_NULL; + stream.avail_in = z->numCompressedBytes; + if (info->isEncrypted) { + stream.avail_in -= 12; + ubuf = (unsigned char *) attemptckalloc(stream.avail_in); + if (!ubuf) { + info->ubuf = NULL; + goto merror; + } + for (j = 0; j < stream.avail_in; j++) { + ch = info->ubuf[j]; + ubuf[j] = zdecode(info->keys, crc32tab, ch); + } + stream.next_in = ubuf; + } else { + stream.next_in = info->ubuf; + } + stream.next_out = info->ubuf = (unsigned char *) + attemptckalloc(info->numBytes); + if (!info->ubuf) { + merror: + if (ubuf) { + info->isEncrypted = 0; + memset(info->keys, 0, sizeof(info->keys)); + ckfree(ubuf); + } + ckfree(info); + if (interp) { + Tcl_SetObjResult(interp, + Tcl_NewStringObj("out of memory", -1)); + Tcl_SetErrorCode(interp, "TCL", "MALLOC", NULL); + } + goto error; + } + stream.avail_out = info->numBytes; + if (inflateInit2(&stream, -15) != Z_OK) { + goto cerror; + } + err = inflate(&stream, Z_SYNC_FLUSH); + inflateEnd(&stream); + if ((err == Z_STREAM_END) + || ((err == Z_OK) && (stream.avail_in == 0))) { + if (ubuf) { + info->isEncrypted = 0; + memset(info->keys, 0, sizeof(info->keys)); + ckfree(ubuf); + } + goto wrapchan; + } + cerror: + if (ubuf) { + info->isEncrypted = 0; + memset(info->keys, 0, sizeof(info->keys)); + ckfree(ubuf); + } + if (info->ubuf) { + ckfree(info->ubuf); + } + ckfree(info); + ZIPFS_ERROR(interp, "decompression error"); + if (interp) { + Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "CORRUPT", NULL); + } + goto error; + } else if (info->isEncrypted) { + unsigned char *ubuf = NULL; + unsigned int j, len; + + /* + * Decode encrypted but uncompressed file, since we support + * Tcl_Seek() on it, and it can be randomly accessed later. + */ + + len = z->numCompressedBytes - 12; + ubuf = (unsigned char *) attemptckalloc(len); + if (ubuf == NULL) { + ckfree((char *) info); + if (interp != NULL) { + Tcl_SetObjResult(interp, + Tcl_NewStringObj("out of memory", -1)); + } + goto error; + } + for (j = 0; j < len; j++) { + ch = info->ubuf[j]; + ubuf[j] = zdecode(info->keys, crc32tab, ch); + } + info->ubuf = ubuf; + info->isEncrypted = 0; + } + } + + wrapchan: + sprintf(cname, "zipfs_%" TCL_Z_MODIFIER "x_%d", z->offset, + ZipFS.idCount++); + z->zipFilePtr->numOpen++; + Unlock(); + return Tcl_CreateChannel(&ZipChannelType, cname, info, flags); + + error: + Unlock(); + return NULL; +} + +/* + *------------------------------------------------------------------------- + * + * ZipEntryStat -- + * + * This function implements the ZIP filesystem specific version of the + * library version of stat. + * + * Results: + * See stat documentation. + * + * Side effects: + * See stat documentation. + * + *------------------------------------------------------------------------- + */ + +static int +ZipEntryStat( + char *path, + Tcl_StatBuf *buf) +{ + ZipEntry *z; + int ret = -1; + + ReadLock(); + z = ZipFSLookup(path); + if (z) { + memset(buf, 0, sizeof(Tcl_StatBuf)); + if (z->isDirectory) { + buf->st_mode = S_IFDIR | 0555; + } else { + buf->st_mode = S_IFREG | 0555; + } + buf->st_size = z->numBytes; + buf->st_mtime = z->timestamp; + buf->st_ctime = z->timestamp; + buf->st_atime = z->timestamp; + ret = 0; + } + Unlock(); + return ret; +} + +/* + *------------------------------------------------------------------------- + * + * ZipEntryAccess -- + * + * This function implements the ZIP filesystem specific version of the + * library version of access. + * + * Results: + * See access documentation. + * + * Side effects: + * See access documentation. + * + *------------------------------------------------------------------------- + */ + +static int +ZipEntryAccess( + char *path, + int mode) +{ + ZipEntry *z; + + if (mode & 3) { + return -1; + } + ReadLock(); + z = ZipFSLookup(path); + Unlock(); + return (z ? 0 : -1); +} + +/* + *------------------------------------------------------------------------- + * + * ZipFSOpenFileChannelProc -- + * + * Results: + * + * Side effects: + * + *------------------------------------------------------------------------- + */ + +static Tcl_Channel +ZipFSOpenFileChannelProc( + Tcl_Interp *interp, /* Current interpreter. */ + Tcl_Obj *pathPtr, + int mode, + int permissions) +{ + int len; + + pathPtr = Tcl_FSGetNormalizedPath(NULL, pathPtr); + if (!pathPtr) { + return NULL; + } + return ZipChannelOpen(interp, Tcl_GetStringFromObj(pathPtr, &len), mode, + permissions); +} + +/* + *------------------------------------------------------------------------- + * + * ZipFSStatProc -- + * + * This function implements the ZIP filesystem specific version of the + * library version of stat. + * + * Results: + * See stat documentation. + * + * Side effects: + * See stat documentation. + * + *------------------------------------------------------------------------- + */ + +static int +ZipFSStatProc( + Tcl_Obj *pathPtr, + Tcl_StatBuf *buf) +{ + int len; + + pathPtr = Tcl_FSGetNormalizedPath(NULL, pathPtr); + if (!pathPtr) { + return -1; + } + return ZipEntryStat(Tcl_GetStringFromObj(pathPtr, &len), buf); +} + +/* + *------------------------------------------------------------------------- + * + * ZipFSAccessProc -- + * + * This function implements the ZIP filesystem specific version of the + * library version of access. + * + * Results: + * See access documentation. + * + * Side effects: + * See access documentation. + * + *------------------------------------------------------------------------- + */ + +static int +ZipFSAccessProc( + Tcl_Obj *pathPtr, + int mode) +{ + int len; + + pathPtr = Tcl_FSGetNormalizedPath(NULL, pathPtr); + if (!pathPtr) { + return -1; + } + return ZipEntryAccess(Tcl_GetStringFromObj(pathPtr, &len), mode); +} + +/* + *------------------------------------------------------------------------- + * + * ZipFSFilesystemSeparatorProc -- + * + * This function returns the separator to be used for a given path. The + * object returned should have a refCount of zero + * + * Results: + * A Tcl object, with a refCount of zero. If the caller needs to retain a + * reference to the object, it should call Tcl_IncrRefCount, and should + * otherwise free the object. + * + * Side effects: + * None. + * + *------------------------------------------------------------------------- + */ + +static Tcl_Obj * +ZipFSFilesystemSeparatorProc( + TCL_UNUSED(Tcl_Obj *) /*pathPtr*/) +{ + return Tcl_NewStringObj("/", -1); +} + +/* + *------------------------------------------------------------------------- + * + * ZipFSMatchInDirectoryProc -- + * + * This routine is used by the globbing code to search a directory for + * all files which match a given pattern. + * + * Results: + * The return value is a standard Tcl result indicating whether an error + * occurred in globbing. Errors are left in interp, good results are + * lappend'ed to resultPtr (which must be a valid object). + * + * Side effects: + * None. + * + *------------------------------------------------------------------------- + */ + +static int +ZipFSMatchInDirectoryProc( + TCL_UNUSED(Tcl_Interp *), + Tcl_Obj *result, + Tcl_Obj *pathPtr, + const char *pattern, + Tcl_GlobTypeData *types) +{ + Tcl_HashEntry *hPtr; + Tcl_HashSearch search; + Tcl_Obj *normPathPtr = Tcl_FSGetNormalizedPath(NULL, pathPtr); + int scnt, l, dirOnly = -1, prefixLen, strip = 0; + size_t len; + char *pat, *prefix, *path; + Tcl_DString dsPref; + + if (!normPathPtr) { + return -1; + } + if (types) { + dirOnly = (types->type & TCL_GLOB_TYPE_DIR) == TCL_GLOB_TYPE_DIR; + } + + /* + * The prefix that gets prepended to results. + */ + + prefix = Tcl_GetStringFromObj(pathPtr, &prefixLen); + + /* + * The (normalized) path we're searching. + */ + + path = Tcl_GetString(normPathPtr); + len = normPathPtr->length; + + Tcl_DStringInit(&dsPref); + Tcl_DStringAppend(&dsPref, prefix, prefixLen); + + if (strcmp(prefix, path) == 0) { + prefix = NULL; + } else { + strip = len + 1; + } + if (prefix) { + Tcl_DStringAppend(&dsPref, "/", 1); + prefixLen++; + prefix = Tcl_DStringValue(&dsPref); + } + ReadLock(); + if (types && (types->type == TCL_GLOB_TYPE_MOUNT)) { + l = CountSlashes(path); + if (path[len - 1] == '/') { + len--; + } else { + l++; + } + if (!pattern || (pattern[0] == '\0')) { + pattern = "*"; + } + for (hPtr = Tcl_FirstHashEntry(&ZipFS.zipHash, &search); hPtr; + hPtr = Tcl_NextHashEntry(&search)) { + ZipFile *zf = (ZipFile *) Tcl_GetHashValue(hPtr); + + if (zf->mountPointLen == 0) { + ZipEntry *z; + + for (z = zf->topEnts; z; z = z->tnext) { + size_t lenz = strlen(z->name); + + if ((lenz > len + 1) && (strncmp(z->name, path, len) == 0) + && (z->name[len] == '/') + && (CountSlashes(z->name) == l) + && Tcl_StringCaseMatch(z->name + len + 1, pattern, + 0)) { + if (prefix) { + Tcl_DStringAppend(&dsPref, z->name, lenz); + Tcl_ListObjAppendElement(NULL, result, + Tcl_NewStringObj(Tcl_DStringValue(&dsPref), + Tcl_DStringLength(&dsPref))); + Tcl_DStringSetLength(&dsPref, prefixLen); + } else { + Tcl_ListObjAppendElement(NULL, result, + Tcl_NewStringObj(z->name, lenz)); + } + } + } + } else if ((zf->mountPointLen > len + 1) + && (strncmp(zf->mountPoint, path, len) == 0) + && (zf->mountPoint[len] == '/') + && (CountSlashes(zf->mountPoint) == l) + && Tcl_StringCaseMatch(zf->mountPoint + len + 1, + pattern, 0)) { + if (prefix) { + Tcl_DStringAppend(&dsPref, zf->mountPoint, + zf->mountPointLen); + Tcl_ListObjAppendElement(NULL, result, + Tcl_NewStringObj(Tcl_DStringValue(&dsPref), + Tcl_DStringLength(&dsPref))); + Tcl_DStringSetLength(&dsPref, prefixLen); + } else { + Tcl_ListObjAppendElement(NULL, result, + Tcl_NewStringObj(zf->mountPoint, + zf->mountPointLen)); + } + } + } + goto end; + } + + if (!pattern || (pattern[0] == '\0')) { + hPtr = Tcl_FindHashEntry(&ZipFS.fileHash, path); + if (hPtr) { + ZipEntry *z = (ZipEntry *) Tcl_GetHashValue(hPtr); + + if ((dirOnly < 0) || (!dirOnly && !z->isDirectory) + || (dirOnly && z->isDirectory)) { + if (prefix) { + Tcl_DStringAppend(&dsPref, z->name, -1); + Tcl_ListObjAppendElement(NULL, result, + Tcl_NewStringObj(Tcl_DStringValue(&dsPref), + Tcl_DStringLength(&dsPref))); + Tcl_DStringSetLength(&dsPref, prefixLen); + } else { + Tcl_ListObjAppendElement(NULL, result, + Tcl_NewStringObj(z->name, -1)); + } + } + } + goto end; + } + + l = strlen(pattern); + pat = (char *) ckalloc(len + l + 2); + memcpy(pat, path, len); + while ((len > 1) && (pat[len - 1] == '/')) { + --len; + } + if ((len > 1) || (pat[0] != '/')) { + pat[len] = '/'; + ++len; + } + memcpy(pat + len, pattern, l + 1); + scnt = CountSlashes(pat); + for (hPtr = Tcl_FirstHashEntry(&ZipFS.fileHash, &search); + hPtr; hPtr = Tcl_NextHashEntry(&search)) { + ZipEntry *z = (ZipEntry *) Tcl_GetHashValue(hPtr); + + if ((dirOnly >= 0) && ((dirOnly && !z->isDirectory) + || (!dirOnly && z->isDirectory))) { + continue; + } + if ((z->depth == scnt) && Tcl_StringCaseMatch(z->name, pat, 0)) { + if (prefix) { + Tcl_DStringAppend(&dsPref, z->name + strip, -1); + Tcl_ListObjAppendElement(NULL, result, + Tcl_NewStringObj(Tcl_DStringValue(&dsPref), + Tcl_DStringLength(&dsPref))); + Tcl_DStringSetLength(&dsPref, prefixLen); + } else { + Tcl_ListObjAppendElement(NULL, result, + Tcl_NewStringObj(z->name + strip, -1)); + } + } + } + ckfree(pat); + + end: + Unlock(); + Tcl_DStringFree(&dsPref); + return TCL_OK; +} + +/* + *------------------------------------------------------------------------- + * + * ZipFSPathInFilesystemProc -- + * + * This function determines if the given path object is in the ZIP + * filesystem. + * + * Results: + * TCL_OK when the path object is in the ZIP filesystem, -1 otherwise. + * + * Side effects: + * None. + * + *------------------------------------------------------------------------- + */ + +static int +ZipFSPathInFilesystemProc( + Tcl_Obj *pathPtr, + TCL_UNUSED(ClientData *)) +{ + Tcl_HashEntry *hPtr; + Tcl_HashSearch search; + int ret = -1; + size_t len; + char *path; + + pathPtr = Tcl_FSGetNormalizedPath(NULL, pathPtr); + if (!pathPtr) { + return -1; + } + + path = Tcl_GetString(pathPtr); + if (strncmp(path, ZIPFS_VOLUME, ZIPFS_VOLUME_LEN) != 0) { + return -1; + } + + len = pathPtr->length; + + ReadLock(); + hPtr = Tcl_FindHashEntry(&ZipFS.fileHash, path); + if (hPtr) { + ret = TCL_OK; + goto endloop; + } + + for (hPtr = Tcl_FirstHashEntry(&ZipFS.zipHash, &search); hPtr; + hPtr = Tcl_NextHashEntry(&search)) { + ZipFile *zf = (ZipFile *) Tcl_GetHashValue(hPtr); + + if (zf->mountPointLen == 0) { + ZipEntry *z; + + for (z = zf->topEnts; z != NULL; z = z->tnext) { + size_t lenz = strlen(z->name); + + if ((len >= lenz) && (strncmp(path, z->name, lenz) == 0)) { + ret = TCL_OK; + goto endloop; + } + } + } else if ((len >= zf->mountPointLen) && + (strncmp(path, zf->mountPoint, zf->mountPointLen) == 0)) { + ret = TCL_OK; + break; + } + } + + endloop: + Unlock(); + return ret; +} + +/* + *------------------------------------------------------------------------- + * + * ZipFSListVolumesProc -- + * + * Lists the currently mounted ZIP filesystem volumes. + * + * Results: + * The list of volumes. + * + * Side effects: + * None + * + *------------------------------------------------------------------------- + */ + +static Tcl_Obj * +ZipFSListVolumesProc(void) +{ + return Tcl_NewStringObj(ZIPFS_VOLUME, -1); +} + +/* + *------------------------------------------------------------------------- + * + * ZipFSFileAttrStringsProc -- + * + * This function implements the ZIP filesystem dependent 'file + * attributes' subcommand, for listing the set of possible attribute + * strings. + * + * Results: + * An array of strings + * + * Side effects: + * None. + * + *------------------------------------------------------------------------- + */ + +static const char *const * +ZipFSFileAttrStringsProc( + TCL_UNUSED(Tcl_Obj *) /*pathPtr*/, + TCL_UNUSED(Tcl_Obj **) /*objPtrRef*/) +{ + static const char *const attrs[] = { + "-uncompsize", + "-compsize", + "-offset", + "-mount", + "-archive", + "-permissions", + NULL, + }; + + return attrs; +} + +/* + *------------------------------------------------------------------------- + * + * ZipFSFileAttrsGetProc -- + * + * This function implements the ZIP filesystem specific 'file attributes' + * subcommand, for 'get' operations. + * + * Results: + * Standard Tcl return code. The object placed in objPtrRef (if TCL_OK + * was returned) is likely to have a refCount of zero. Either way we must + * either store it somewhere (e.g. the Tcl result), or Incr/Decr its + * refCount to ensure it is properly freed. + * + * Side effects: + * None. + * + *------------------------------------------------------------------------- + */ + +static int +ZipFSFileAttrsGetProc( + Tcl_Interp *interp, /* Current interpreter. */ + int index, + Tcl_Obj *pathPtr, + Tcl_Obj **objPtrRef) +{ + int len, ret = TCL_OK; + char *path; + ZipEntry *z; + + pathPtr = Tcl_FSGetNormalizedPath(NULL, pathPtr); + if (!pathPtr) { + return -1; + } + path = Tcl_GetStringFromObj(pathPtr, &len); + ReadLock(); + z = ZipFSLookup(path); + if (!z) { + Tcl_SetErrno(ENOENT); + ZIPFS_POSIX_ERROR(interp, "file not found"); + ret = TCL_ERROR; + goto done; + } + switch (index) { + case 0: + TclNewIntObj(*objPtrRef, z->numBytes); + break; + case 1: + TclNewIntObj(*objPtrRef, z->numCompressedBytes); + break; + case 2: + TclNewIntObj(*objPtrRef, z->offset); + break; + case 3: + *objPtrRef = Tcl_NewStringObj(z->zipFilePtr->mountPoint, + z->zipFilePtr->mountPointLen); + break; + case 4: + *objPtrRef = Tcl_NewStringObj(z->zipFilePtr->name, -1); + break; + case 5: + *objPtrRef = Tcl_NewStringObj("0o555", -1); + break; + default: + ZIPFS_ERROR(interp, "unknown attribute"); + ret = TCL_ERROR; + } + + done: + Unlock(); + return ret; +} + +/* + *------------------------------------------------------------------------- + * + * ZipFSFileAttrsSetProc -- + * + * This function implements the ZIP filesystem specific 'file attributes' + * subcommand, for 'set' operations. + * + * Results: + * Standard Tcl return code. + * + * Side effects: + * None. + * + *------------------------------------------------------------------------- + */ + +static int +ZipFSFileAttrsSetProc( + Tcl_Interp *interp, /* Current interpreter. */ + TCL_UNUSED(int) /*index*/, + TCL_UNUSED(Tcl_Obj *) /*pathPtr*/, + TCL_UNUSED(Tcl_Obj *) /*objPtr*/) +{ + if (interp) { + Tcl_SetObjResult(interp, Tcl_NewStringObj("unsupported operation", -1)); + Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "UNSUPPORTED_OP", NULL); + } + return TCL_ERROR; +} + +/* + *------------------------------------------------------------------------- + * + * ZipFSFilesystemPathTypeProc -- + * + * Results: + * + * Side effects: + * + *------------------------------------------------------------------------- + */ + +static Tcl_Obj * +ZipFSFilesystemPathTypeProc( + TCL_UNUSED(Tcl_Obj *) /*pathPtr*/) +{ + return Tcl_NewStringObj("zip", -1); +} + +/* + *------------------------------------------------------------------------- + * + * ZipFSLoadFile -- + * + * This functions deals with loading native object code. If the given + * path object refers to a file within the ZIP filesystem, an approriate + * error code is returned to delegate loading to the caller (by copying + * the file to temp store and loading from there). As fallback when the + * file refers to the ZIP file system but is not present, it is looked up + * relative to the executable and loaded from there when available. + * + * Results: + * TCL_OK on success, TCL_ERROR otherwise with error message left. + * + * Side effects: + * Loads native code into the process address space. + * + *------------------------------------------------------------------------- + */ + +static int +ZipFSLoadFile( + Tcl_Interp *interp, /* Current interpreter. */ + Tcl_Obj *path, + Tcl_LoadHandle *loadHandle, + Tcl_FSUnloadFileProc **unloadProcPtr, + int flags) +{ + Tcl_FSLoadFileProc2 *loadFileProc; +#ifdef ANDROID + /* + * Force loadFileProc to native implementation since the package manager + * already extracted the shared libraries from the APK at install time. + */ + + loadFileProc = (Tcl_FSLoadFileProc2 *) tclNativeFilesystem.loadFileProc; + if (loadFileProc) { + return loadFileProc(interp, path, loadHandle, unloadProcPtr, flags); + } + Tcl_SetErrno(ENOENT); + ZIPFS_ERROR(interp, Tcl_PosixError(interp)); + return TCL_ERROR; +#else /* !ANDROID */ + Tcl_Obj *altPath = NULL; + int ret = TCL_ERROR; + Tcl_Obj *objs[2] = { NULL, NULL }; + + if (Tcl_FSAccess(path, R_OK) == 0) { + /* + * EXDEV should trigger loading by copying to temp store. + */ + + Tcl_SetErrno(EXDEV); + ZIPFS_ERROR(interp, Tcl_PosixError(interp)); + return ret; + } + + objs[1] = TclPathPart(interp, path, TCL_PATH_DIRNAME); + if (objs[1] && (ZipFSAccessProc(objs[1], R_OK) == 0)) { + const char *execName = Tcl_GetNameOfExecutable(); + + /* + * Shared object is not in ZIP but its path prefix is, thus try to + * load from directory where the executable came from. + */ + + TclDecrRefCount(objs[1]); + objs[1] = TclPathPart(interp, path, TCL_PATH_TAIL); + + /* + * Get directory name of executable manually to deal with cases where + * [file dirname [info nameofexecutable]] is equal to [info + * nameofexecutable] due to VFS effects. + */ + + if (execName) { + const char *p = strrchr(execName, '/'); + + if (p > execName + 1) { + --p; + objs[0] = Tcl_NewStringObj(execName, p - execName); + } + } + if (!objs[0]) { + objs[0] = TclPathPart(interp, TclGetObjNameOfExecutable(), + TCL_PATH_DIRNAME); + } + if (objs[0]) { + altPath = TclJoinPath(2, objs, 0); + if (altPath) { + Tcl_IncrRefCount(altPath); + if (Tcl_FSAccess(altPath, R_OK) == 0) { + path = altPath; + } + } + } + } + if (objs[0]) { + Tcl_DecrRefCount(objs[0]); + } + if (objs[1]) { + Tcl_DecrRefCount(objs[1]); + } + + loadFileProc = (Tcl_FSLoadFileProc2 *) (void *) + tclNativeFilesystem.loadFileProc; + if (loadFileProc) { + ret = loadFileProc(interp, path, loadHandle, unloadProcPtr, flags); + } else { + Tcl_SetErrno(ENOENT); + ZIPFS_ERROR(interp, Tcl_PosixError(interp)); + } + if (altPath) { + Tcl_DecrRefCount(altPath); + } + return ret; +#endif /* ANDROID */ +} + +#endif /* HAVE_ZLIB */ + +/* + *------------------------------------------------------------------------- + * + * TclZipfs_Init -- + * + * Perform per interpreter initialization of this module. + * + * Results: + * The return value is a standard Tcl result. + * + * Side effects: + * Initializes this module if not already initialized, and adds module + * related commands to the given interpreter. + * + *------------------------------------------------------------------------- + */ + +int +TclZipfs_Init( + Tcl_Interp *interp) /* Current interpreter. */ +{ +#ifdef HAVE_ZLIB + static const EnsembleImplMap initMap[] = { + {"mkimg", ZipFSMkImgObjCmd, NULL, NULL, NULL, 1}, + {"mkzip", ZipFSMkZipObjCmd, NULL, NULL, NULL, 1}, + {"lmkimg", ZipFSLMkImgObjCmd, NULL, NULL, NULL, 1}, + {"lmkzip", ZipFSLMkZipObjCmd, NULL, NULL, NULL, 1}, + /* The 4 entries above are not available in safe interpreters */ + {"mount", ZipFSMountObjCmd, NULL, NULL, NULL, 1}, + {"mount_data", ZipFSMountBufferObjCmd, NULL, NULL, NULL, 1}, + {"unmount", ZipFSUnmountObjCmd, NULL, NULL, NULL, 1}, + {"mkkey", ZipFSMkKeyObjCmd, NULL, NULL, NULL, 1}, + {"exists", ZipFSExistsObjCmd, NULL, NULL, NULL, 0}, + {"info", ZipFSInfoObjCmd, NULL, NULL, NULL, 0}, + {"list", ZipFSListObjCmd, NULL, NULL, NULL, 0}, + {"canonical", ZipFSCanonicalObjCmd, NULL, NULL, NULL, 0}, + {"root", ZipFSRootObjCmd, NULL, NULL, NULL, 0}, + {NULL, NULL, NULL, NULL, NULL, 0} + }; + static const char findproc[] = + "namespace eval ::tcl::zipfs {}\n" + "proc ::tcl::zipfs::Find dir {\n" + " set result {}\n" + " if {[catch {glob -directory $dir -nocomplain * .*} list]} {\n" + " return $result\n" + " }\n" + " foreach file $list {\n" + " if {[file tail $file] in {. ..}} {\n" + " continue\n" + " }\n" + " lappend result $file {*}[Find $file]\n" + " }\n" + " return $result\n" + "}\n" + "proc ::tcl::zipfs::find {directoryName} {\n" + " return [lsort [Find $directoryName]]\n" + "}\n"; + + /* + * One-time initialization. + */ + + WriteLock(); + if (!ZipFS.initialized) { + ZipfsSetup(); + } + Unlock(); + + if (interp) { + Tcl_Command ensemble; + Tcl_Obj *mapObj; + + Tcl_EvalEx(interp, findproc, -1, TCL_EVAL_GLOBAL); + Tcl_LinkVar(interp, "::tcl::zipfs::wrmax", (char *) &ZipFS.wrmax, + TCL_LINK_INT); + ensemble = TclMakeEnsemble(interp, "zipfs", + Tcl_IsSafe(interp) ? (initMap + 4) : initMap); + + /* + * Add the [zipfs find] subcommand. + */ + + Tcl_GetEnsembleMappingDict(NULL, ensemble, &mapObj); + Tcl_DictObjPut(NULL, mapObj, Tcl_NewStringObj("find", -1), + Tcl_NewStringObj("::tcl::zipfs::find", -1)); + Tcl_CreateObjCommand(interp, "::tcl::zipfs::tcl_library_init", + ZipFSTclLibraryObjCmd, NULL, NULL); + Tcl_PkgProvide(interp, "tcl::zipfs", "2.0"); + } + return TCL_OK; +#else /* !HAVE_ZLIB */ + ZIPFS_ERROR(interp, "no zlib available"); + Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "NO_ZLIB", NULL); + return TCL_ERROR; +#endif /* HAVE_ZLIB */ +} + +#if !defined(STATIC_BUILD) +static int +ZipfsAppHookFindTclInit( + const char *archive) +{ + Tcl_Obj *vfsInitScript; + int found; + + if (zipfs_literal_tcl_library) { + return TCL_ERROR; + } + if (TclZipfs_Mount(NULL, ZIPFS_ZIP_MOUNT, archive, NULL)) { + /* Either the file doesn't exist or it is not a zip archive */ + return TCL_ERROR; + } + + TclNewLiteralStringObj(vfsInitScript, ZIPFS_ZIP_MOUNT "/init.tcl"); + Tcl_IncrRefCount(vfsInitScript); + found = Tcl_FSAccess(vfsInitScript, F_OK); + Tcl_DecrRefCount(vfsInitScript); + if (found == 0) { + zipfs_literal_tcl_library = ZIPFS_ZIP_MOUNT; + return TCL_OK; + } + + TclNewLiteralStringObj(vfsInitScript, + ZIPFS_ZIP_MOUNT "/tcl_library/init.tcl"); + Tcl_IncrRefCount(vfsInitScript); + found = Tcl_FSAccess(vfsInitScript, F_OK); + Tcl_DecrRefCount(vfsInitScript); + if (found == 0) { + zipfs_literal_tcl_library = ZIPFS_ZIP_MOUNT "/tcl_library"; + return TCL_OK; + } + + return TCL_ERROR; +} +#endif + +static void +ZipfsExitHandler( + ClientData clientData) +{ + ZipFile *zf = (ZipFile *) clientData; + + if (TCL_OK != TclZipfs_Unmount(NULL, zf->mountPoint)) { + Tcl_Panic("tried to unmount busy filesystem"); + } +} + +/* + *------------------------------------------------------------------------- + * + * TclZipfs_AppHook -- + * + * Performs the argument munging for the shell + * + *------------------------------------------------------------------------- + */ + +int +TclZipfs_AppHook( +#ifdef SUPPORT_BUILTIN_ZIP_INSTALL + int *argcPtr, /* Pointer to argc */ +#else + TCL_UNUSED(int *), /*argcPtr*/ +#endif +#ifdef _WIN32 + TCL_UNUSED(WCHAR ***)) /* argvPtr */ +#else /* !_WIN32 */ + char ***argvPtr) /* Pointer to argv */ +#endif /* _WIN32 */ +{ + const char *archive; + +#ifdef _WIN32 + Tcl_FindExecutable(NULL); +#else + Tcl_FindExecutable((*argvPtr)[0]); +#endif + archive = Tcl_GetNameOfExecutable(); + TclZipfs_Init(NULL); + + /* + * Look for init.tcl in one of the locations mounted later in this + * function. + */ + + if (!TclZipfs_Mount(NULL, ZIPFS_APP_MOUNT, archive, NULL)) { + int found; + Tcl_Obj *vfsInitScript; + + TclNewLiteralStringObj(vfsInitScript, ZIPFS_APP_MOUNT "/main.tcl"); + Tcl_IncrRefCount(vfsInitScript); + if (Tcl_FSAccess(vfsInitScript, F_OK) == 0) { + /* + * Startup script should be set before calling Tcl_AppInit + */ + + Tcl_SetStartupScript(vfsInitScript, NULL); + } else { + Tcl_DecrRefCount(vfsInitScript); + } + + /* + * Set Tcl Encodings + */ + + if (!zipfs_literal_tcl_library) { + TclNewLiteralStringObj(vfsInitScript, + ZIPFS_APP_MOUNT "/tcl_library/init.tcl"); + Tcl_IncrRefCount(vfsInitScript); + found = Tcl_FSAccess(vfsInitScript, F_OK); + Tcl_DecrRefCount(vfsInitScript); + if (found == TCL_OK) { + zipfs_literal_tcl_library = ZIPFS_APP_MOUNT "/tcl_library"; + return TCL_OK; + } + } +#ifdef SUPPORT_BUILTIN_ZIP_INSTALL + } else if (*argcPtr > 1) { + /* + * If the first argument is "install", run the supplied installer + * script. + */ + +#ifdef _WIN32 + Tcl_DString ds; + + Tcl_DStringInit(&ds); + archive = Tcl_WCharToUtfDString((*argvPtr)[1], -1, &ds); +#else /* !_WIN32 */ + archive = (*argvPtr)[1]; +#endif /* _WIN32 */ + if (strcmp(archive, "install") == 0) { + Tcl_Obj *vfsInitScript; + + /* + * Run this now to ensure the file is present by the time Tcl_Main + * wants it. + */ + + TclZipfs_TclLibrary(); + TclNewLiteralStringObj(vfsInitScript, + ZIPFS_ZIP_MOUNT "/tcl_library/install.tcl"); + Tcl_IncrRefCount(vfsInitScript); + if (Tcl_FSAccess(vfsInitScript, F_OK) == 0) { + Tcl_SetStartupScript(vfsInitScript, NULL); + } + return TCL_OK; + } else if (!TclZipfs_Mount(NULL, ZIPFS_APP_MOUNT, archive, NULL)) { + int found; + Tcl_Obj *vfsInitScript; + + TclNewLiteralStringObj(vfsInitScript, ZIPFS_APP_MOUNT "/main.tcl"); + Tcl_IncrRefCount(vfsInitScript); + if (Tcl_FSAccess(vfsInitScript, F_OK) == 0) { + /* + * Startup script should be set before calling Tcl_AppInit + */ + + Tcl_SetStartupScript(vfsInitScript, NULL); + } else { + Tcl_DecrRefCount(vfsInitScript); + } + /* Set Tcl Encodings */ + TclNewLiteralStringObj(vfsInitScript, + ZIPFS_APP_MOUNT "/tcl_library/init.tcl"); + Tcl_IncrRefCount(vfsInitScript); + found = Tcl_FSAccess(vfsInitScript, F_OK); + Tcl_DecrRefCount(vfsInitScript); + if (found == TCL_OK) { + zipfs_literal_tcl_library = ZIPFS_APP_MOUNT "/tcl_library"; + return TCL_OK; + } + } +#ifdef _WIN32 + Tcl_DStringFree(&ds); +#endif /* _WIN32 */ +#endif /* SUPPORT_BUILTIN_ZIP_INSTALL */ + } + return TCL_OK; +} + +#ifndef HAVE_ZLIB + +/* + *------------------------------------------------------------------------- + * + * TclZipfs_Mount, TclZipfs_MountBuffer, TclZipfs_Unmount -- + * + * Dummy version when no ZLIB support available. + * + *------------------------------------------------------------------------- + */ + +int +TclZipfs_Mount( + Tcl_Interp *interp, /* Current interpreter. */ + const char *mountPoint, /* Mount point path. */ + const char *zipname, /* Path to ZIP file to mount. */ + const char *passwd) /* Password for opening the ZIP, or NULL if + * the ZIP is unprotected. */ +{ + ZIPFS_ERROR(interp, "no zlib available"); + if (interp) { + Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "NO_ZLIB", NULL); + } + return TCL_ERROR; +} + +int +TclZipfs_MountBuffer( + Tcl_Interp *interp, /* Current interpreter. NULLable. */ + const char *mountPoint, /* Mount point path. */ + unsigned char *data, + size_t datalen, + int copy) +{ + ZIPFS_ERROR(interp, "no zlib available"); + if (interp) { + Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "NO_ZLIB", NULL); + } + return TCL_ERROR; +} + +int +TclZipfs_Unmount( + Tcl_Interp *interp, /* Current interpreter. */ + const char *mountPoint) /* Mount point path. */ +{ + ZIPFS_ERROR(interp, "no zlib available"); + if (interp) { + Tcl_SetErrorCode(interp, "TCL", "ZIPFS", "NO_ZLIB", NULL); + } + return TCL_ERROR; +} +#endif /* !HAVE_ZLIB */ + +/* + * Local Variables: + * mode: c + * c-basic-offset: 4 + * fill-column: 78 + * End: + */ |