/*
* tclWinFCmd.c
*
* This file implements the Windows specific portion of file manipulation
* subcommands of the "file" command.
*
* Copyright (c) 1996-1998 Sun Microsystems, Inc.
*
* See the file "license.terms" for information on usage and redistribution
* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
*
* RCS: @(#) $Id: tclWinFCmd.c,v 1.8 2000/05/22 23:55:09 hobbs Exp $
*/
#include "tclWinInt.h"
/*
* The following constants specify the type of callback when
* TraverseWinTree() calls the traverseProc()
*/
#define DOTREE_PRED 1 /* pre-order directory */
#define DOTREE_POSTD 2 /* post-order directory */
#define DOTREE_F 3 /* regular file */
/*
* Callbacks for file attributes code.
*/
static int GetWinFileAttributes _ANSI_ARGS_((Tcl_Interp *interp,
int objIndex, CONST char *fileName,
Tcl_Obj **attributePtrPtr));
static int GetWinFileLongName _ANSI_ARGS_((Tcl_Interp *interp,
int objIndex, CONST char *fileName,
Tcl_Obj **attributePtrPtr));
static int GetWinFileShortName _ANSI_ARGS_((Tcl_Interp *interp,
int objIndex, CONST char *fileName,
Tcl_Obj **attributePtrPtr));
static int SetWinFileAttributes _ANSI_ARGS_((Tcl_Interp *interp,
int objIndex, CONST char *fileName,
Tcl_Obj *attributePtr));
static int CannotSetAttribute _ANSI_ARGS_((Tcl_Interp *interp,
int objIndex, CONST char *fileName,
Tcl_Obj *attributePtr));
/*
* Constants and variables necessary for file attributes subcommand.
*/
enum {
WIN_ARCHIVE_ATTRIBUTE,
WIN_HIDDEN_ATTRIBUTE,
WIN_LONGNAME_ATTRIBUTE,
WIN_READONLY_ATTRIBUTE,
WIN_SHORTNAME_ATTRIBUTE,
WIN_SYSTEM_ATTRIBUTE
};
static int attributeArray[] = {FILE_ATTRIBUTE_ARCHIVE, FILE_ATTRIBUTE_HIDDEN,
0, FILE_ATTRIBUTE_READONLY, 0, FILE_ATTRIBUTE_SYSTEM};
char *tclpFileAttrStrings[] = {
"-archive", "-hidden", "-longname", "-readonly",
"-shortname", "-system", (char *) NULL
};
const TclFileAttrProcs tclpFileAttrProcs[] = {
{GetWinFileAttributes, SetWinFileAttributes},
{GetWinFileAttributes, SetWinFileAttributes},
{GetWinFileLongName, CannotSetAttribute},
{GetWinFileAttributes, SetWinFileAttributes},
{GetWinFileShortName, CannotSetAttribute},
{GetWinFileAttributes, SetWinFileAttributes}};
/*
* Prototype for the TraverseWinTree callback function.
*/
typedef int (TraversalProc)(Tcl_DString *srcPtr, Tcl_DString *dstPtr,
int type, Tcl_DString *errorPtr);
/*
* Declarations for local procedures defined in this file:
*/
static void StatError(Tcl_Interp *interp, CONST char *fileName);
static int ConvertFileNameFormat(Tcl_Interp *interp,
int objIndex, CONST char *fileName, int longShort,
Tcl_Obj **attributePtrPtr);
static int DoCopyFile(Tcl_DString *srcPtr, Tcl_DString *dstPtr);
static int DoCreateDirectory(Tcl_DString *pathPtr);
static int DoDeleteFile(Tcl_DString *pathPtr);
static int DoRemoveDirectory(Tcl_DString *pathPtr, int recursive,
Tcl_DString *errorPtr);
static int DoRenameFile(const TCHAR *nativeSrc, Tcl_DString *dstPtr);
static int TraversalCopy(Tcl_DString *srcPtr, Tcl_DString *dstPtr,
int type, Tcl_DString *errorPtr);
static int TraversalDelete(Tcl_DString *srcPtr, Tcl_DString *dstPtr,
int type, Tcl_DString *errorPtr);
static int TraverseWinTree(TraversalProc *traverseProc,
Tcl_DString *sourcePtr, Tcl_DString *dstPtr,
Tcl_DString *errorPtr);
/*
*---------------------------------------------------------------------------
*
* TclpRenameFile, DoRenameFile --
*
* Changes the name of an existing file or directory, from src to dst.
* If src and dst refer to the same file or directory, does nothing
* and returns success. Otherwise if dst already exists, it will be
* deleted and replaced by src subject to the following conditions:
* If src is a directory, dst may be an empty directory.
* If src is a file, dst may be a file.
* In any other situation where dst already exists, the rename will
* fail.
*
* Results:
* If the file or directory was successfully renamed, returns TCL_OK.
* Otherwise the return value is TCL_ERROR and errno is set to
* indicate the error. Some possible values for errno are:
*
* ENAMETOOLONG: src or dst names are too long.
* EACCES: src or dst parent directory can't be read and/or written.
* EEXIST: dst is a non-empty directory.
* EINVAL: src is a root directory or dst is a subdirectory of src.
* EISDIR: dst is a directory, but src is not.
* ENOENT: src doesn't exist. src or dst is "".
* ENOTDIR: src is a directory, but dst is not.
* EXDEV: src and dst are on different filesystems.
*
* EACCES: exists an open file already referring to src or dst.
* EACCES: src or dst specify the current working directory (NT).
* EACCES: src specifies a char device (nul:, com1:, etc.)
* EEXIST: dst specifies a char device (nul:, com1:, etc.) (NT)
* EACCES: dst specifies a char device (nul:, com1:, etc.) (95)
*
* Side effects:
* The implementation supports cross-filesystem renames of files,
* but the caller should be prepared to emulate cross-filesystem
* renames of directories if errno is EXDEV.
*
*---------------------------------------------------------------------------
*/
int
TclpRenameFile(
CONST char *src, /* Pathname of file or dir to be renamed
* (UTF-8). */
CONST char *dst) /* New pathname of file or directory
* (UTF-8). */
{
int result;
TCHAR *nativeSrc;
Tcl_DString srcString, dstString;
nativeSrc = Tcl_WinUtfToTChar(src, -1, &srcString);
Tcl_WinUtfToTChar(dst, -1, &dstString);
result = DoRenameFile(nativeSrc, &dstString);
Tcl_DStringFree(&srcString);
Tcl_DStringFree(&dstString);
return result;
}
static int
DoRenameFile(
CONST TCHAR *nativeSrc, /* Pathname of file or dir to be renamed
* (native). */
Tcl_DString *dstPtr) /* New pathname for file or directory
* (native). */
{
const TCHAR *nativeDst;
DWORD srcAttr, dstAttr;
nativeDst = (TCHAR *) Tcl_DStringValue(dstPtr);
/*
* Would throw an exception under NT if one of the arguments is a
* char block device.
*/
__try {
if ((*tclWinProcs->moveFileProc)(nativeSrc, nativeDst) != FALSE) {
return TCL_OK;
}
} __except (-1) {}
TclWinConvertError(GetLastError());
srcAttr = (*tclWinProcs->getFileAttributesProc)(nativeSrc);
dstAttr = (*tclWinProcs->getFileAttributesProc)(nativeDst);
if (srcAttr == 0xffffffff) {
if ((*tclWinProcs->getFullPathNameProc)(nativeSrc, 0, NULL, NULL) >= MAX_PATH) {
errno = ENAMETOOLONG;
return TCL_ERROR;
}
srcAttr = 0;
}
if (dstAttr == 0xffffffff) {
if ((*tclWinProcs->getFullPathNameProc)(nativeDst, 0, NULL, NULL) >= MAX_PATH) {
errno = ENAMETOOLONG;
return TCL_ERROR;
}
dstAttr = 0;
}
if (errno == EBADF) {
errno = EACCES;
return TCL_ERROR;
}
if (errno == EACCES) {
decode:
if (srcAttr & FILE_ATTRIBUTE_DIRECTORY) {
TCHAR *nativeSrcRest, *nativeDstRest;
char **srcArgv, **dstArgv;
int size, srcArgc, dstArgc;
WCHAR nativeSrcPath[MAX_PATH];
WCHAR nativeDstPath[MAX_PATH];
Tcl_DString srcString, dstString;
CONST char *src, *dst;
size = (*tclWinProcs->getFullPathNameProc)(nativeSrc, MAX_PATH,
nativeSrcPath, &nativeSrcRest);
if ((size == 0) || (size > MAX_PATH)) {
return TCL_ERROR;
}
size = (*tclWinProcs->getFullPathNameProc)(nativeDst, MAX_PATH,
nativeDstPath, &nativeDstRest);
if ((size == 0) || (size > MAX_PATH)) {
return TCL_ERROR;
}
(*tclWinProcs->charLowerProc)((TCHAR *) nativeSrcPath);
(*tclWinProcs->charLowerProc)((TCHAR *) nativeDstPath);
src = Tcl_WinTCharToUtf((TCHAR *) nativeSrcPath, -1, &srcString);
dst = Tcl_WinTCharToUtf((TCHAR *) nativeDstPath, -1, &dstString);
if (strncmp(src, dst, (size_t) Tcl_DStringLength(&srcString)) == 0) {
/*
* Trying to move a directory into itself.
*/
errno = EINVAL;
Tcl_DStringFree(&srcString);
Tcl_DStringFree(&dstString);
return TCL_ERROR;
}
Tcl_SplitPath(src, &srcArgc, &srcArgv);
Tcl_SplitPath(dst, &dstArgc, &dstArgv);
Tcl_DStringFree(&srcString);
Tcl_DStringFree(&dstString);
if (srcArgc == 1) {
/*
* They are trying to move a root directory. Whether
* or not it is across filesystems, this cannot be
* done.
*/
Tcl_SetErrno(EINVAL);
} else if ((srcArgc > 0) && (dstArgc > 0) &&
(strcmp(srcArgv[0], dstArgv[0]) != 0)) {
/*
* If src is a directory and dst filesystem != src
* filesystem, errno should be EXDEV. It is very
* important to get this behavior, so that the caller
* can respond to a cross filesystem rename by
* simulating it with copy and delete. The MoveFile
* system call already handles the case of moving a
* file between filesystems.
*/
Tcl_SetErrno(EXDEV);
}
ckfree((char *) srcArgv);
ckfree((char *) dstArgv);
}
/*
* Other types of access failure is that dst is a read-only
* filesystem, that an open file referred to src or dest, or that
* src or dest specified the current working directory on the
* current filesystem. EACCES is returned for those cases.
*/
} else if (Tcl_GetErrno() == EEXIST) {
/*
* Reports EEXIST any time the target already exists. If it makes
* sense, remove the old file and try renaming again.
*/
if (srcAttr & FILE_ATTRIBUTE_DIRECTORY) {
if (dstAttr & FILE_ATTRIBUTE_DIRECTORY) {
/*
* Overwrite empty dst directory with src directory. The
* following call will remove an empty directory. If it
* fails, it's because it wasn't empty.
*/
if (DoRemoveDirectory(dstPtr, 0, NULL) == TCL_OK) {
/*
* Now that that empty directory is gone, we can try
* renaming again. If that fails, we'll put this empty
* directory back, for completeness.
*/
if ((*tclWinProcs->moveFileProc)(nativeSrc, nativeDst) != FALSE) {
return TCL_OK;
}
/*
* Some new error has occurred. Don't know what it
* could be, but report this one.
*/
TclWinConvertError(GetLastError());
(*tclWinProcs->createDirectoryProc)(nativeDst, NULL);
(*tclWinProcs->setFileAttributesProc)(nativeDst, dstAttr);
if (Tcl_GetErrno() == EACCES) {
/*
* Decode the EACCES to a more meaningful error.
*/
goto decode;
}
}
} else { /* (dstAttr & FILE_ATTRIBUTE_DIRECTORY) == 0 */
Tcl_SetErrno(ENOTDIR);
}
} else { /* (srcAttr & FILE_ATTRIBUTE_DIRECTORY) == 0 */
if (dstAttr & FILE_ATTRIBUTE_DIRECTORY) {
Tcl_SetErrno(EISDIR);
} else {
/*
* Overwrite existing file by:
*
* 1. Rename existing file to temp name.
* 2. Rename old file to new name.
* 3. If success, delete temp file. If failure,
* put temp file back to old name.
*/
TCHAR *nativeRest, *nativeTmp, *nativePrefix;
int result, size;
WCHAR tempBuf[MAX_PATH];
size = (*tclWinProcs->getFullPathNameProc)(nativeDst, MAX_PATH,
tempBuf, &nativeRest);
if ((size == 0) || (size > MAX_PATH) || (nativeRest == NULL)) {
return TCL_ERROR;
}
nativeTmp = (TCHAR *) tempBuf;
((char *) nativeRest)[0] = '\0';
((char *) nativeRest)[1] = '\0'; /* In case it's Unicode. */
result = TCL_ERROR;
nativePrefix = (tclWinProcs->useWide)
? (TCHAR *) L"tclr" : (TCHAR *) "tclr";
if ((*tclWinProcs->getTempFileNameProc)(nativeTmp,
nativePrefix, 0, tempBuf) != 0) {
/*
* Strictly speaking, need the following DeleteFile and
* MoveFile to be joined as an atomic operation so no
* other app comes along in the meantime and creates the
* same temp file.
*/
nativeTmp = (TCHAR *) tempBuf;
(*tclWinProcs->deleteFileProc)(nativeTmp);
if ((*tclWinProcs->moveFileProc)(nativeDst, nativeTmp) != FALSE) {
if ((*tclWinProcs->moveFileProc)(nativeSrc, nativeDst) != FALSE) {
(*tclWinProcs->setFileAttributesProc)(nativeTmp,
FILE_ATTRIBUTE_NORMAL);
(*tclWinProcs->deleteFileProc)(nativeTmp);
return TCL_OK;
} else {
(*tclWinProcs->deleteFileProc)(nativeDst);
(*tclWinProcs->moveFileProc)(nativeTmp, nativeDst);
}
}
/*
* Can't backup dst file or move src file. Return that
* error. Could happen if an open file refers to dst.
*/
TclWinConvertError(GetLastError());
if (Tcl_GetErrno() == EACCES) {
/*
* Decode the EACCES to a more meaningful error.
*/
goto decode;
}
}
return result;
}
}
}
return TCL_ERROR;
}
/*
*---------------------------------------------------------------------------
*
* TclpCopyFile, DoCopyFile --
*
* Copy a single file (not a directory). If dst already exists and
* is not a directory, it is removed.
*
* Results:
* If the file was successfully copied, returns TCL_OK. Otherwise
* the return value is TCL_ERROR and errno is set to indicate the
* error. Some possible values for errno are:
*
* EACCES: src or dst parent directory can't be read and/or written.
* EISDIR: src or dst is a directory.
* ENOENT: src doesn't exist. src or dst is "".
*
* EACCES: exists an open file already referring to dst (95).
* EACCES: src specifies a char device (nul:, com1:, etc.) (NT)
* ENOENT: src specifies a char device (nul:, com1:, etc.) (95)
*
* Side effects:
* It is not an error to copy to a char device.
*
*---------------------------------------------------------------------------
*/
int
TclpCopyFile(
CONST char *src, /* Pathname of file to be copied (UTF-8). */
CONST char *dst) /* Pathname of file to copy to (UTF-8). */
{
int result;
Tcl_DString srcString, dstString;
Tcl_WinUtfToTChar(src, -1, &srcString);
Tcl_WinUtfToTChar(dst, -1, &dstString);
result = DoCopyFile(&srcString, &dstString);
Tcl_DStringFree(&srcString);
Tcl_DStringFree(&dstString);
return result;
}
static int
DoCopyFile(
Tcl_DString *srcPtr, /* Pathname of file to be copied (native). */
Tcl_DString *dstPtr) /* Pathname of file to copy to (native). */
{
CONST TCHAR *nativeSrc, *nativeDst;
nativeSrc = (TCHAR *) Tcl_DStringValue(srcPtr);
nativeDst = (TCHAR *) Tcl_DStringValue(dstPtr);
/*
* Would throw an exception under NT if one of the arguments is a char
* block device.
*/
__try {
if ((*tclWinProcs->copyFileProc)(nativeSrc, nativeDst, 0) != FALSE) {
return TCL_OK;
}
} __except (-1) {}
TclWinConvertError(GetLastError());
if (Tcl_GetErrno() == EBADF) {
Tcl_SetErrno(EACCES);
return TCL_ERROR;
}
if (Tcl_GetErrno() == EACCES) {
DWORD srcAttr, dstAttr;
srcAttr = (*tclWinProcs->getFileAttributesProc)(nativeSrc);
dstAttr = (*tclWinProcs->getFileAttributesProc)(nativeDst);
if (srcAttr != 0xffffffff) {
if (dstAttr == 0xffffffff) {
dstAttr = 0;
}
if ((srcAttr & FILE_ATTRIBUTE_DIRECTORY) ||
(dstAttr & FILE_ATTRIBUTE_DIRECTORY)) {
Tcl_SetErrno(EISDIR);
}
if (dstAttr & FILE_ATTRIBUTE_READONLY) {
(*tclWinProcs->setFileAttributesProc)(nativeDst,
dstAttr & ~FILE_ATTRIBUTE_READONLY);
if ((*tclWinProcs->copyFileProc)(nativeSrc, nativeDst, 0) != FALSE) {
return TCL_OK;
}
/*
* Still can't copy onto dst. Return that error, and
* restore attributes of dst.
*/
TclWinConvertError(GetLastError());
(*tclWinProcs->setFileAttributesProc)(nativeDst, dstAttr);
}
}
}
return TCL_ERROR;
}
/*
*---------------------------------------------------------------------------
*
* TclpDeleteFile, DoDeleteFile --
*
* Removes a single file (not a directory).
*
* Results:
* If the file was successfully deleted, returns TCL_OK. Otherwise
* the return value is TCL_ERROR and errno is set to indicate the
* error. Some possible values for errno are:
*
* EACCES: a parent directory can't be read and/or written.
* EISDIR: path is a directory.
* ENOENT: path doesn't exist or is "".
*
* EACCES: exists an open file already referring to path.
* EACCES: path is a char device (nul:, com1:, etc.)
*
* Side effects:
* The file is deleted, even if it is read-only.
*
*---------------------------------------------------------------------------
*/
int
TclpDeleteFile(
CONST char *path) /* Pathname of file to be removed (UTF-8). */
{
int result;
Tcl_DString pathString;
Tcl_WinUtfToTChar(path, -1, &pathString);
result = DoDeleteFile(&pathString);
Tcl_DStringFree(&pathString);
return result;
}
static int
DoDeleteFile(
Tcl_DString *pathPtr) /* Pathname of file to be removed (native). */
{
DWORD attr;
CONST TCHAR *nativePath;
nativePath = (TCHAR *) Tcl_DStringValue(pathPtr);
if ((*tclWinProcs->deleteFileProc)(nativePath) != FALSE) {
return TCL_OK;
}
TclWinConvertError(GetLastError());
/*
* Win32s thinks that "" is the same as "." and then reports EISDIR
* instead of ENOENT.
*/
if (tclWinProcs->useWide) {
if (((WCHAR *) nativePath)[0] == '\0') {
Tcl_SetErrno(ENOENT);
return TCL_ERROR;
}
} else {
if (((char *) nativePath)[0] == '\0') {
Tcl_SetErrno(ENOENT);
return TCL_ERROR;
}
}
if (Tcl_GetErrno() == EACCES) {
attr = (*tclWinProcs->getFileAttributesProc)(nativePath);
if (attr != 0xffffffff) {
if (attr & FILE_ATTRIBUTE_DIRECTORY) {
/*
* Windows NT reports removing a directory as EACCES instead
* of EISDIR.
*/
Tcl_SetErrno(EISDIR);
} else if (attr & FILE_ATTRIBUTE_READONLY) {
(*tclWinProcs->setFileAttributesProc)(nativePath,
attr & ~FILE_ATTRIBUTE_READONLY);
if ((*tclWinProcs->deleteFileProc)(nativePath) != FALSE) {
return TCL_OK;
}
TclWinConvertError(GetLastError());
(*tclWinProcs->setFileAttributesProc)(nativePath, attr);
}
}
} else if (Tcl_GetErrno() == ENOENT) {
attr = (*tclWinProcs->getFileAttributesProc)(nativePath);
if (attr != 0xffffffff) {
if (attr & FILE_ATTRIBUTE_DIRECTORY) {
/*
* Windows 95 reports removing a directory as ENOENT instead
* of EISDIR.
*/
Tcl_SetErrno(EISDIR);
}
}
} else if (Tcl_GetErrno() == EINVAL) {
/*
* Windows NT reports removing a char device as EINVAL instead of
* EACCES.
*/
Tcl_SetErrno(EACCES);
}
return TCL_ERROR;
}
/*
*---------------------------------------------------------------------------
*
* TclpCreateDirectory --
*
* Creates the specified directory. All parent directories of the
* specified directory must already exist. The directory is
* automatically created with permissions so that user can access
* the new directory and create new files or subdirectories in it.
*
* Results:
* If the directory was successfully created, returns TCL_OK.
* Otherwise the return value is TCL_ERROR and errno is set to
* indicate the error. Some possible values for errno are:
*
* EACCES: a parent directory can't be read and/or written.
* EEXIST: path already exists.
* ENOENT: a parent directory doesn't exist.
*
* Side effects:
* A directory is created.
*
*---------------------------------------------------------------------------
*/
int
TclpCreateDirectory(
CONST char *path) /* Pathname of directory to create (UTF-8). */
{
int result;
Tcl_DString pathString;
Tcl_WinUtfToTChar(path, -1, &pathString);
result = DoCreateDirectory(&pathString);
Tcl_DStringFree(&pathString);
return result;
}
static int
DoCreateDirectory(
Tcl_DString *pathPtr) /* Pathname of directory to create (native). */
{
DWORD error;
CONST TCHAR *nativePath;
nativePath = (TCHAR *) Tcl_DStringValue(pathPtr);
if ((*tclWinProcs->createDirectoryProc)(nativePath, NULL) == 0) {
error = GetLastError();
TclWinConvertError(error);
return TCL_ERROR;
}
return TCL_OK;
}
/*
*---------------------------------------------------------------------------
*
* TclpCopyDirectory --
*
* Recursively copies a directory. The target directory dst must
* not already exist. Note that this function does not merge two
* directory hierarchies, even if the target directory is an an
* empty directory.
*
* Results:
* If the directory was successfully copied, returns TCL_OK.
* Otherwise the return value is TCL_ERROR, errno is set to indicate
* the error, and the pathname of the file that caused the error
* is stored in errorPtr. See TclpCreateDirectory and TclpCopyFile
* for a description of possible values for errno.
*
* Side effects:
* An exact copy of the directory hierarchy src will be created
* with the name dst. If an error occurs, the error will
* be returned immediately, and remaining files will not be
* processed.
*
*---------------------------------------------------------------------------
*/
int
TclpCopyDirectory(
CONST char *src, /* Pathname of directory to be copied
* (UTF-8). */
CONST char *dst, /* Pathname of target directory (UTF-8). */
Tcl_DString *errorPtr) /* If non-NULL, uninitialized or free
* DString filled with UTF-8 name of file
* causing error. */
{
int result;
Tcl_DString srcString, dstString;
Tcl_WinUtfToTChar(src, -1, &srcString);
Tcl_WinUtfToTChar(dst, -1, &dstString);
result = TraverseWinTree(TraversalCopy, &srcString, &dstString, errorPtr);
Tcl_DStringFree(&srcString);
Tcl_DStringFree(&dstString);
return result;
}
/*
*----------------------------------------------------------------------
*
* TclpRemoveDirectory, DoRemoveDirectory --
*
* Removes directory (and its contents, if the recursive flag is set).
*
* Results:
* If the directory was successfully removed, returns TCL_OK.
* Otherwise the return value is TCL_ERROR, errno is set to indicate
* the error, and the pathname of the file that caused the error
* is stored in errorPtr. Some possible values for errno are:
*
* EACCES: path directory can't be read and/or written.
* EEXIST: path is a non-empty directory.
* EINVAL: path is root directory or current directory.
* ENOENT: path doesn't exist or is "".
* ENOTDIR: path is not a directory.
*
* EACCES: path is a char device (nul:, com1:, etc.) (95)
* EINVAL: path is a char device (nul:, com1:, etc.) (NT)
*
* Side effects:
* Directory removed. If an error occurs, the error will be returned
* immediately, and remaining files will not be deleted.
*
*----------------------------------------------------------------------
*/
int
TclpRemoveDirectory(
CONST char *path, /* Pathname of directory to be removed
* (UTF-8). */
int recursive, /* If non-zero, removes directories that
* are nonempty. Otherwise, will only remove
* empty directories. */
Tcl_DString *errorPtr) /* If non-NULL, uninitialized or free
* DString filled with UTF-8 name of file
* causing error. */
{
int result;
Tcl_DString pathString;
Tcl_WinUtfToTChar(path, -1, &pathString);
result = DoRemoveDirectory(&pathString, recursive, errorPtr);
Tcl_DStringFree(&pathString);
return result;
}
static int
DoRemoveDirectory(
Tcl_DString *pathPtr, /* Pathname of directory to be removed
* (native). */
int recursive, /* If non-zero, removes directories that
* are nonempty. Otherwise, will only remove
* empty directories. */
Tcl_DString *errorPtr) /* If non-NULL, uninitialized or free
* DString filled with UTF-8 name of file
* causing error. */
{
CONST TCHAR *nativePath;
DWORD attr;
nativePath = (TCHAR *) Tcl_DStringValue(pathPtr);
if ((*tclWinProcs->removeDirectoryProc)(nativePath) != FALSE) {
return TCL_OK;
}
TclWinConvertError(GetLastError());
/*
* Win32s thinks that "" is the same as "." and then reports EACCES
* instead of ENOENT.
*/
if (tclWinProcs->useWide) {
if (((WCHAR *) nativePath)[0] == '\0') {
Tcl_SetErrno(ENOENT);
return TCL_ERROR;
}
} else {
if (((char *) nativePath)[0] == '\0') {
Tcl_SetErrno(ENOENT);
return TCL_ERROR;
}
}
if (Tcl_GetErrno() == EACCES) {
attr = (*tclWinProcs->getFileAttributesProc)(nativePath);
if (attr != 0xffffffff) {
if ((attr & FILE_ATTRIBUTE_DIRECTORY) == 0) {
/*
* Windows 95 reports calling RemoveDirectory on a file as an
* EACCES, not an ENOTDIR.
*/
Tcl_SetErrno(ENOTDIR);
goto end;
}
if (attr & FILE_ATTRIBUTE_READONLY) {
attr &= ~FILE_ATTRIBUTE_READONLY;
if ((*tclWinProcs->setFileAttributesProc)(nativePath, attr) == FALSE) {
goto end;
}
if ((*tclWinProcs->removeDirectoryProc)(nativePath) != FALSE) {
return TCL_OK;
}
TclWinConvertError(GetLastError());
(*tclWinProcs->setFileAttributesProc)(nativePath,
attr | FILE_ATTRIBUTE_READONLY);
}
/*
* Windows 95 and Win32s report removing a non-empty directory
* as EACCES, not EEXIST. If the directory is not empty,
* change errno so caller knows what's going on.
*/
if (TclWinGetPlatformId() != VER_PLATFORM_WIN32_NT) {
char *path, *find;
HANDLE handle;
WIN32_FIND_DATAA data;
Tcl_DString buffer;
int len;
path = (char *) nativePath;
Tcl_DStringInit(&buffer);
len = strlen(path);
find = Tcl_DStringAppend(&buffer, path, len);
if ((len > 0) && (find[len - 1] != '\\')) {
Tcl_DStringAppend(&buffer, "\\", 1);
}
find = Tcl_DStringAppend(&buffer, "*.*", 3);
handle = FindFirstFileA(find, &data);
if (handle != INVALID_HANDLE_VALUE) {
while (1) {
if ((strcmp(data.cFileName, ".") != 0)
&& (strcmp(data.cFileName, "..") != 0)) {
/*
* Found something in this directory.
*/
Tcl_SetErrno(EEXIST);
break;
}
if (FindNextFileA(handle, &data) == FALSE) {
break;
}
}
FindClose(handle);
}
Tcl_DStringFree(&buffer);
}
}
}
if (Tcl_GetErrno() == ENOTEMPTY) {
/*
* The caller depends on EEXIST to signify that the directory is
* not empty, not ENOTEMPTY.
*/
Tcl_SetErrno(EEXIST);
}
if ((recursive != 0) && (Tcl_GetErrno() == EEXIST)) {
/*
* The directory is nonempty, but the recursive flag has been
* specified, so we recursively remove all the files in the directory.
*/
return TraverseWinTree(TraversalDelete, pathPtr, NULL, errorPtr);
}
end:
if (errorPtr != NULL) {
Tcl_WinTCharToUtf(nativePath, -1, errorPtr);
}
return TCL_ERROR;
}
/*
*---------------------------------------------------------------------------
*
* TraverseWinTree --
*
* Traverse directory tree specified by sourcePtr, calling the function
* traverseProc for each file and directory encountered. If destPtr
* is non-null, each of name in the sourcePtr directory is appended to
* the directory specified by destPtr and passed as the second argument
* to traverseProc() .
*
* Results:
* Standard Tcl result.
*
* Side effects:
* None caused by TraverseWinTree, however the user specified
* traverseProc() may change state. If an error occurs, the error will
* be returned immediately, and remaining files will not be processed.
*
*---------------------------------------------------------------------------
*/
static int
TraverseWinTree(
TraversalProc *traverseProc,/* Function to call for every file and
* directory in source hierarchy. */
Tcl_DString *sourcePtr, /* Pathname of source directory to be
* traversed (native). */
Tcl_DString *targetPtr, /* Pathname of directory to traverse in
* parallel with source directory (native). */
Tcl_DString *errorPtr) /* If non-NULL, uninitialized or free
* DString filled with UTF-8 name of file
* causing error. */
{
DWORD sourceAttr;
TCHAR *nativeSource, *nativeErrfile;
int result, found, sourceLen, targetLen, oldSourceLen, oldTargetLen;
HANDLE handle;
WIN32_FIND_DATAT data;
nativeErrfile = NULL;
result = TCL_OK;
oldTargetLen = 0; /* lint. */
nativeSource = (TCHAR *) Tcl_DStringValue(sourcePtr);
oldSourceLen = Tcl_DStringLength(sourcePtr);
sourceAttr = (*tclWinProcs->getFileAttributesProc)(nativeSource);
if (sourceAttr == 0xffffffff) {
nativeErrfile = nativeSource;
goto end;
}
if ((sourceAttr & FILE_ATTRIBUTE_DIRECTORY) == 0) {
/*
* Process the regular file
*/
return (*traverseProc)(sourcePtr, targetPtr, DOTREE_F, errorPtr);
}
if (tclWinProcs->useWide) {
Tcl_DStringAppend(sourcePtr, (char *) L"\\*.*", 4 * sizeof(WCHAR) + 1);
Tcl_DStringSetLength(sourcePtr, Tcl_DStringLength(sourcePtr) - 1);
} else {
Tcl_DStringAppend(sourcePtr, "\\*.*", 4);
}
nativeSource = (TCHAR *) Tcl_DStringValue(sourcePtr);
handle = (*tclWinProcs->findFirstFileProc)(nativeSource, &data);
if (handle == INVALID_HANDLE_VALUE) {
/*
* Can't read directory
*/
TclWinConvertError(GetLastError());
nativeErrfile = nativeSource;
goto end;
}
nativeSource[oldSourceLen + 1] = '\0';
Tcl_DStringSetLength(sourcePtr, oldSourceLen);
result = (*traverseProc)(sourcePtr, targetPtr, DOTREE_PRED, errorPtr);
if (result != TCL_OK) {
FindClose(handle);
return result;
}
sourceLen = oldSourceLen;
if (tclWinProcs->useWide) {
sourceLen += sizeof(WCHAR);
Tcl_DStringAppend(sourcePtr, (char *) L"\\", sizeof(WCHAR) + 1);
Tcl_DStringSetLength(sourcePtr, sourceLen);
} else {
sourceLen += 1;
Tcl_DStringAppend(sourcePtr, "\\", 1);
}
if (targetPtr != NULL) {
oldTargetLen = Tcl_DStringLength(targetPtr);
targetLen = oldTargetLen;
if (tclWinProcs->useWide) {
targetLen += sizeof(WCHAR);
Tcl_DStringAppend(targetPtr, (char *) L"\\", sizeof(WCHAR) + 1);
Tcl_DStringSetLength(targetPtr, targetLen);
} else {
targetLen += 1;
Tcl_DStringAppend(targetPtr, "\\", 1);
}
}
found = 1;
for ( ; found; found = (*tclWinProcs->findNextFileProc)(handle, &data)) {
TCHAR *nativeName;
int len;
if (tclWinProcs->useWide) {
WCHAR *wp;
wp = data.w.cFileName;
if (*wp == '.') {
wp++;
if (*wp == '.') {
wp++;
}
if (*wp == '\0') {
continue;
}
}
nativeName = (TCHAR *) data.w.cFileName;
len = Tcl_UniCharLen(data.w.cFileName) * sizeof(WCHAR);
} else {
if ((strcmp(data.a.cFileName, ".") == 0)
|| (strcmp(data.a.cFileName, "..") == 0)) {
continue;
}
nativeName = (TCHAR *) data.a.cFileName;
len = strlen(data.a.cFileName);
}
/*
* Append name after slash, and recurse on the file.
*/
Tcl_DStringAppend(sourcePtr, (char *) nativeName, len + 1);
Tcl_DStringSetLength(sourcePtr, Tcl_DStringLength(sourcePtr) - 1);
if (targetPtr != NULL) {
Tcl_DStringAppend(targetPtr, (char *) nativeName, len + 1);
Tcl_DStringSetLength(targetPtr, Tcl_DStringLength(targetPtr) - 1);
}
result = TraverseWinTree(traverseProc, sourcePtr, targetPtr,
errorPtr);
if (result != TCL_OK) {
break;
}
/*
* Remove name after slash.
*/
Tcl_DStringSetLength(sourcePtr, sourceLen);
if (targetPtr != NULL) {
Tcl_DStringSetLength(targetPtr, targetLen);
}
}
FindClose(handle);
/*
* Strip off the trailing slash we added
*/
Tcl_DStringSetLength(sourcePtr, oldSourceLen + 1);
Tcl_DStringSetLength(sourcePtr, oldSourceLen);
if (targetPtr != NULL) {
Tcl_DStringSetLength(targetPtr, oldTargetLen + 1);
Tcl_DStringSetLength(targetPtr, oldTargetLen);
}
if (result == TCL_OK) {
/*
* Call traverseProc() on a directory after visiting all the
* files in that directory.
*/
result = (*traverseProc)(sourcePtr, targetPtr, DOTREE_POSTD,
errorPtr);
}
end:
if (nativeErrfile != NULL) {
TclWinConvertError(GetLastError());
if (errorPtr != NULL) {
Tcl_WinTCharToUtf(nativeErrfile, -1, errorPtr);
}
result = TCL_ERROR;
}
return result;
}
/*
*----------------------------------------------------------------------
*
* TraversalCopy
*
* Called from TraverseUnixTree in order to execute a recursive
* copy of a directory.
*
* Results:
* Standard Tcl result.
*
* Side effects:
* Depending on the value of type, src may be copied to dst.
*
*----------------------------------------------------------------------
*/
static int
TraversalCopy(
Tcl_DString *srcPtr, /* Source pathname to copy. */
Tcl_DString *dstPtr, /* Destination pathname of copy. */
int type, /* Reason for call - see TraverseWinTree() */
Tcl_DString *errorPtr) /* If non-NULL, initialized DString filled
* with UTF-8 name of file causing error. */
{
TCHAR *nativeDst, *nativeSrc;
DWORD attr;
switch (type) {
case DOTREE_F: {
if (DoCopyFile(srcPtr, dstPtr) == TCL_OK) {
return TCL_OK;
}
break;
}
case DOTREE_PRED: {
if (DoCreateDirectory(dstPtr) == TCL_OK) {
nativeSrc = (TCHAR *) Tcl_DStringValue(srcPtr);
nativeDst = (TCHAR *) Tcl_DStringValue(dstPtr);
attr = (*tclWinProcs->getFileAttributesProc)(nativeSrc);
if ((*tclWinProcs->setFileAttributesProc)(nativeDst, attr) != FALSE) {
return TCL_OK;
}
TclWinConvertError(GetLastError());
}
break;
}
case DOTREE_POSTD: {
return TCL_OK;
}
}
/*
* There shouldn't be a problem with src, because we already
* checked it to get here.
*/
if (errorPtr != NULL) {
nativeDst = (TCHAR *) Tcl_DStringValue(dstPtr);
Tcl_WinTCharToUtf(nativeDst, -1, errorPtr);
}
return TCL_ERROR;
}
/*
*----------------------------------------------------------------------
*
* TraversalDelete --
*
* Called by procedure TraverseWinTree for every file and
* directory that it encounters in a directory hierarchy. This
* procedure unlinks files, and removes directories after all the
* containing files have been processed.
*
* Results:
* Standard Tcl result.
*
* Side effects:
* Files or directory specified by src will be deleted. If an
* error occurs, the windows error is converted to a Posix error
* and errno is set accordingly.
*
*----------------------------------------------------------------------
*/
static int
TraversalDelete(
Tcl_DString *srcPtr, /* Source pathname to delete. */
Tcl_DString *dstPtr, /* Not used. */
int type, /* Reason for call - see TraverseWinTree() */
Tcl_DString *errorPtr) /* If non-NULL, initialized DString filled
* with UTF-8 name of file causing error. */
{
TCHAR *nativeSrc;
switch (type) {
case DOTREE_F: {
if (DoDeleteFile(srcPtr) == TCL_OK) {
return TCL_OK;
}
break;
}
case DOTREE_PRED: {
return TCL_OK;
}
case DOTREE_POSTD: {
if (DoRemoveDirectory(srcPtr, 0, NULL) == TCL_OK) {
return TCL_OK;
}
break;
}
}
if (errorPtr != NULL) {
nativeSrc = (TCHAR *) Tcl_DStringValue(srcPtr);
Tcl_WinTCharToUtf(nativeSrc, -1, errorPtr);
}
return TCL_ERROR;
}
/*
*----------------------------------------------------------------------
*
* StatError --
*
* Sets the object result with the appropriate error.
*
* Results:
* None.
*
* Side effects:
* The interp's object result is set with an error message
* based on the objIndex, fileName and errno.
*
*----------------------------------------------------------------------
*/
static void
StatError(
Tcl_Interp *interp, /* The interp that has the error */
CONST char *fileName) /* The name of the file which caused the
* error. */
{
TclWinConvertError(GetLastError());
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
"could not read \"", fileName, "\": ", Tcl_PosixError(interp),
(char *) NULL);
}
/*
*----------------------------------------------------------------------
*
* GetWinFileAttributes --
*
* Returns a Tcl_Obj containing the value of a file attribute.
* This routine gets the -hidden, -readonly or -system attribute.
*
* Results:
* Standard Tcl result and a Tcl_Obj in attributePtrPtr. The object
* will have ref count 0. If the return value is not TCL_OK,
* attributePtrPtr is not touched.
*
* Side effects:
* A new object is allocated if the file is valid.
*
*----------------------------------------------------------------------
*/
static int
GetWinFileAttributes(
Tcl_Interp *interp, /* The interp we are using for errors. */
int objIndex, /* The index of the attribute. */
CONST char *fileName, /* The name of the file. */
Tcl_Obj **attributePtrPtr) /* A pointer to return the object with. */
{
DWORD result;
Tcl_DString ds;
TCHAR *nativeName;
nativeName = Tcl_WinUtfToTChar(fileName, -1, &ds);
result = (*tclWinProcs->getFileAttributesProc)(nativeName);
Tcl_DStringFree(&ds);
if (result == 0xffffffff) {
StatError(interp, fileName);
return TCL_ERROR;
}
*attributePtrPtr = Tcl_NewBooleanObj((int) (result & attributeArray[objIndex]));
return TCL_OK;
}
/*
*----------------------------------------------------------------------
*
* ConvertFileNameFormat --
*
* Returns a Tcl_Obj containing either the long or short version of the
* file name.
*
* Results:
* Standard Tcl result and a Tcl_Obj in attributePtrPtr. The object
* will have ref count 0. If the return value is not TCL_OK,
* attributePtrPtr is not touched.
*
* Side effects:
* A new object is allocated if the file is valid.
*
*----------------------------------------------------------------------
*/
static int
ConvertFileNameFormat(
Tcl_Interp *interp, /* The interp we are using for errors. */
int objIndex, /* The index of the attribute. */
CONST char *fileName, /* The name of the file. */
int longShort, /* 0 to short name, 1 to long name. */
Tcl_Obj **attributePtrPtr) /* A pointer to return the object with. */
{
int pathc, i;
char **pathv, **newv;
char *resultStr;
Tcl_DString resultDString;
int result = TCL_OK;
Tcl_SplitPath(fileName, &pathc, &pathv);
newv = (char **) ckalloc(pathc * sizeof(char *));
if (pathc == 0) {
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
"could not read \"", fileName,
"\": no such file or directory",
(char *) NULL);
result = TCL_ERROR;
goto cleanup;
}
for (i = 0; i < pathc; i++) {
if ((pathv[i][0] == '/')
|| ((strlen(pathv[i]) == 3) && (pathv[i][1] == ':'))
|| (strcmp(pathv[i], ".") == 0)
|| (strcmp(pathv[i], "..") == 0)) {
/*
* Handle "/", "//machine/export", "c:/", "." or ".." by just
* copying the string literally. Uppercase the drive letter,
* just because it looks better under Windows to do so.
*/
simple:
pathv[i][0] = (char) Tcl_UniCharToUpper(UCHAR(pathv[i][0]));
newv[i] = (char *) ckalloc(strlen(pathv[i]) + 1);
lstrcpyA(newv[i], pathv[i]);
} else {
char *str;
TCHAR *nativeName;
Tcl_DString ds;
WIN32_FIND_DATAT data;
HANDLE handle;
DWORD attr;
Tcl_DStringInit(&resultDString);
str = Tcl_JoinPath(i + 1, pathv, &resultDString);
nativeName = Tcl_WinUtfToTChar(str, -1, &ds);
handle = (*tclWinProcs->findFirstFileProc)(nativeName, &data);
if (handle == INVALID_HANDLE_VALUE) {
/*
* FindFirstFile() doesn't like root directories. We
* would only get a root directory here if the caller
* specified "c:" or "c:." and the current directory on the
* drive was the root directory
*/
attr = (*tclWinProcs->getFileAttributesProc)(nativeName);
if ((attr != 0xFFFFFFFF) && (attr & FILE_ATTRIBUTE_DIRECTORY)) {
Tcl_DStringFree(&ds);
Tcl_DStringFree(&resultDString);
goto simple;
}
}
Tcl_DStringFree(&ds);
Tcl_DStringFree(&resultDString);
if (handle == INVALID_HANDLE_VALUE) {
pathc = i - 1;
StatError(interp, fileName);
result = TCL_ERROR;
goto cleanup;
}
if (tclWinProcs->useWide) {
nativeName = (TCHAR *) data.w.cAlternateFileName;
if (longShort) {
if (data.w.cFileName[0] != '\0') {
nativeName = (TCHAR *) data.w.cFileName;
}
} else {
if (data.w.cAlternateFileName[0] == '\0') {
nativeName = (TCHAR *) data.w.cFileName;
}
}
} else {
nativeName = (TCHAR *) data.a.cAlternateFileName;
if (longShort) {
if (data.a.cFileName[0] != '\0') {
nativeName = (TCHAR *) data.a.cFileName;
}
} else {
if (data.a.cAlternateFileName[0] == '\0') {
nativeName = (TCHAR *) data.a.cFileName;
}
}
}
/*
* Purify reports a extraneous UMR in Tcl_WinTCharToUtf() trying
* to dereference nativeName as a Unicode string. I have proven
* to myself that purify is wrong by running the following
* example when nativeName == data.w.cAlternateFileName and
* noting that purify doesn't complain about the first line,
* but does complain about the second.
*
* fprintf(stderr, "%d\n", data.w.cAlternateFileName[0]);
* fprintf(stderr, "%d\n", ((WCHAR *) nativeName)[0]);
*/
Tcl_WinTCharToUtf(nativeName, -1, &ds);
newv[i] = ckalloc((unsigned int) (Tcl_DStringLength(&ds) + 1));
lstrcpyA(newv[i], Tcl_DStringValue(&ds));
Tcl_DStringFree(&ds);
FindClose(handle);
}
}
Tcl_DStringInit(&resultDString);
resultStr = Tcl_JoinPath(pathc, newv, &resultDString);
*attributePtrPtr = Tcl_NewStringObj(resultStr,
Tcl_DStringLength(&resultDString));
Tcl_DStringFree(&resultDString);
cleanup:
for (i = 0; i < pathc; i++) {
ckfree(newv[i]);
}
ckfree((char *) newv);
ckfree((char *) pathv);
return result;
}
/*
*----------------------------------------------------------------------
*
* GetWinFileLongName --
*
* Returns a Tcl_Obj containing the short version of the file
* name.
*
* Results:
* Standard Tcl result and a Tcl_Obj in attributePtrPtr. The object
* will have ref count 0. If the return value is not TCL_OK,
* attributePtrPtr is not touched.
*
* Side effects:
* A new object is allocated if the file is valid.
*
*----------------------------------------------------------------------
*/
static int
GetWinFileLongName(
Tcl_Interp *interp, /* The interp we are using for errors. */
int objIndex, /* The index of the attribute. */
CONST char *fileName, /* The name of the file. */
Tcl_Obj **attributePtrPtr) /* A pointer to return the object with. */
{
return ConvertFileNameFormat(interp, objIndex, fileName, 1, attributePtrPtr);
}
/*
*----------------------------------------------------------------------
*
* GetWinFileShortName --
*
* Returns a Tcl_Obj containing the short version of the file
* name.
*
* Results:
* Standard Tcl result and a Tcl_Obj in attributePtrPtr. The object
* will have ref count 0. If the return value is not TCL_OK,
* attributePtrPtr is not touched.
*
* Side effects:
* A new object is allocated if the file is valid.
*
*----------------------------------------------------------------------
*/
static int
GetWinFileShortName(
Tcl_Interp *interp, /* The interp we are using for errors. */
int objIndex, /* The index of the attribute. */
CONST char *fileName, /* The name of the file. */
Tcl_Obj **attributePtrPtr) /* A pointer to return the object with. */
{
return ConvertFileNameFormat(interp, objIndex, fileName, 0, attributePtrPtr);
}
/*
*----------------------------------------------------------------------
*
* SetWinFileAttributes --
*
* Set the file attributes to the value given by attributePtr.
* This routine sets the -hidden, -readonly, or -system attributes.
*
* Results:
* Standard TCL error.
*
* Side effects:
* The file's attribute is set.
*
*----------------------------------------------------------------------
*/
static int
SetWinFileAttributes(
Tcl_Interp *interp, /* The interp we are using for errors. */
int objIndex, /* The index of the attribute. */
CONST char *fileName, /* The name of the file. */
Tcl_Obj *attributePtr) /* The new value of the attribute. */
{
DWORD fileAttributes;
int yesNo;
int result;
Tcl_DString ds;
TCHAR *nativeName;
nativeName = Tcl_WinUtfToTChar(fileName, -1, &ds);
fileAttributes = (*tclWinProcs->getFileAttributesProc)(nativeName);
if (fileAttributes == 0xffffffff) {
StatError(interp, fileName);
result = TCL_ERROR;
goto end;
}
result = Tcl_GetBooleanFromObj(interp, attributePtr, &yesNo);
if (result != TCL_OK) {
goto end;
}
if (yesNo) {
fileAttributes |= (attributeArray[objIndex]);
} else {
fileAttributes &= ~(attributeArray[objIndex]);
}
if (!(*tclWinProcs->setFileAttributesProc)(nativeName, fileAttributes)) {
StatError(interp, fileName);
result = TCL_ERROR;
goto end;
}
end:
Tcl_DStringFree(&ds);
return result;
}
/*
*----------------------------------------------------------------------
*
* SetWinFileLongName --
*
* The attribute in question is a readonly attribute and cannot
* be set.
*
* Results:
* TCL_ERROR
*
* Side effects:
* The object result is set to a pertinant error message.
*
*----------------------------------------------------------------------
*/
static int
CannotSetAttribute(
Tcl_Interp *interp, /* The interp we are using for errors. */
int objIndex, /* The index of the attribute. */
CONST char *fileName, /* The name of the file. */
Tcl_Obj *attributePtr) /* The new value of the attribute. */
{
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
"cannot set attribute \"", tclpFileAttrStrings[objIndex],
"\" for file \"", fileName, "\": attribute is readonly",
(char *) NULL);
return TCL_ERROR;
}
/*
*---------------------------------------------------------------------------
*
* TclpListVolumes --
*
* Lists the currently mounted volumes
*
* Results:
* A standard Tcl result. Will always be TCL_OK, since there is no way
* that this command can fail. Also, the interpreter's result is set to
* the list of volumes.
*
* Side effects:
* None
*
*---------------------------------------------------------------------------
*/
int
TclpListVolumes(
Tcl_Interp *interp) /* Interpreter for returning volume list. */
{
Tcl_Obj *resultPtr, *elemPtr;
char buf[40 * 4]; /* There couldn't be more than 30 drives??? */
int i;
char *p;
resultPtr = Tcl_GetObjResult(interp);
/*
* On Win32s:
* GetLogicalDriveStrings() isn't implemented.
* GetLogicalDrives() returns incorrect information.
*/
if (GetLogicalDriveStringsA(sizeof(buf), buf) == 0) {
/*
* GetVolumeInformation() will detects all drives, but causes
* chattering on empty floppy drives. We only do this if
* GetLogicalDriveStrings() didn't work. It has also been reported
* that on some laptops it takes a while for GetVolumeInformation()
* to return when pinging an empty floppy drive, another reason to
* try to avoid calling it.
*/
buf[1] = ':';
buf[2] = '/';
buf[3] = '\0';
for (i = 0; i < 26; i++) {
buf[0] = (char) ('a' + i);
if (GetVolumeInformationA(buf, NULL, 0, NULL, NULL, NULL, NULL, 0)
|| (GetLastError() == ERROR_NOT_READY)) {
elemPtr = Tcl_NewStringObj(buf, -1);
Tcl_ListObjAppendElement(NULL, resultPtr, elemPtr);
}
}
} else {
for (p = buf; *p != '\0'; p += 4) {
p[2] = '/';
elemPtr = Tcl_NewStringObj(p, -1);
Tcl_ListObjAppendElement(NULL, resultPtr, elemPtr);
}
}
return TCL_OK;
}