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Diffstat (limited to 'generic/tclFCmd.c')
| -rw-r--r-- | generic/tclFCmd.c | 815 |
1 files changed, 815 insertions, 0 deletions
diff --git a/generic/tclFCmd.c b/generic/tclFCmd.c new file mode 100644 index 0000000..ffee889 --- /dev/null +++ b/generic/tclFCmd.c @@ -0,0 +1,815 @@ +/* + * tclFCmd.c + * + * This file implements the generic portion of file manipulation + * subcommands of the "file" command. + * + * Copyright (c) 1996-1997 Sun Microsystems, Inc. + * + * See the file "license.terms" for information on usage and redistribution + * of this file, and for a DISCLAIMER OF ALL WARRANTIES. + * + * SCCS: @(#) tclFCmd.c 1.17 97/05/14 13:23:13 + */ + +#include "tclInt.h" +#include "tclPort.h" + +/* + * Declarations for local procedures defined in this file: + */ + +static int CopyRenameOneFile _ANSI_ARGS_((Tcl_Interp *interp, + char *source, char *dest, int copyFlag, + int force)); +static char * FileBasename _ANSI_ARGS_((Tcl_Interp *interp, + char *path, Tcl_DString *bufferPtr)); +static int FileCopyRename _ANSI_ARGS_((Tcl_Interp *interp, + int argc, char **argv, int copyFlag)); +static int FileForceOption _ANSI_ARGS_((Tcl_Interp *interp, + int argc, char **argv, int *forcePtr)); + +/* + *--------------------------------------------------------------------------- + * + * TclFileRenameCmd + * + * This procedure implements the "rename" subcommand of the "file" + * command. Filename arguments need to be translated to native + * format before being passed to platform-specific code that + * implements rename functionality. + * + * Results: + * A standard Tcl result. + * + * Side effects: + * See the user documentation. + * + *--------------------------------------------------------------------------- + */ + +int +TclFileRenameCmd(interp, argc, argv) + Tcl_Interp *interp; /* Interp for error reporting. */ + int argc; /* Number of arguments. */ + char **argv; /* Argument strings passed to Tcl_FileCmd. */ +{ + return FileCopyRename(interp, argc, argv, 0); +} + +/* + *--------------------------------------------------------------------------- + * + * TclFileCopyCmd + * + * This procedure implements the "copy" subcommand of the "file" + * command. Filename arguments need to be translated to native + * format before being passed to platform-specific code that + * implements copy functionality. + * + * Results: + * A standard Tcl result. + * + * Side effects: + * See the user documentation. + * + *--------------------------------------------------------------------------- + */ + +int +TclFileCopyCmd(interp, argc, argv) + Tcl_Interp *interp; /* Used for error reporting */ + int argc; /* Number of arguments. */ + char **argv; /* Argument strings passed to Tcl_FileCmd. */ +{ + return FileCopyRename(interp, argc, argv, 1); +} + +/* + *--------------------------------------------------------------------------- + * + * FileCopyRename -- + * + * Performs the work of TclFileRenameCmd and TclFileCopyCmd. + * See comments for those procedures. + * + * Results: + * See above. + * + * Side effects: + * See above. + * + *--------------------------------------------------------------------------- + */ + +static int +FileCopyRename(interp, argc, argv, copyFlag) + Tcl_Interp *interp; /* Used for error reporting. */ + int argc; /* Number of arguments. */ + char **argv; /* Argument strings passed to Tcl_FileCmd. */ + int copyFlag; /* If non-zero, copy source(s). Otherwise, + * rename them. */ +{ + int i, result, force; + struct stat statBuf; + Tcl_DString targetBuffer; + char *target; + + i = FileForceOption(interp, argc - 2, argv + 2, &force); + if (i < 0) { + return TCL_ERROR; + } + i += 2; + if ((argc - i) < 2) { + Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], + " ", argv[1], " ?options? source ?source ...? target\"", + (char *) NULL); + return TCL_ERROR; + } + + /* + * If target doesn't exist or isn't a directory, try the copy/rename. + * More than 2 arguments is only valid if the target is an existing + * directory. + */ + + target = Tcl_TranslateFileName(interp, argv[argc - 1], &targetBuffer); + if (target == NULL) { + return TCL_ERROR; + } + + result = TCL_OK; + + /* + * Call stat() so that if target is a symlink that points to a directory + * we will put the sources in that directory instead of overwriting the + * symlink. + */ + + if ((stat(target, &statBuf) != 0) || !S_ISDIR(statBuf.st_mode)) { + if ((argc - i) > 2) { + errno = ENOTDIR; + Tcl_PosixError(interp); + Tcl_AppendResult(interp, "error ", + ((copyFlag) ? "copying" : "renaming"), ": target \"", + argv[argc - 1], "\" is not a directory", (char *) NULL); + result = TCL_ERROR; + } else { + /* + * Even though already have target == translated(argv[i+1]), + * pass the original argument down, so if there's an error, the + * error message will reflect the original arguments. + */ + + result = CopyRenameOneFile(interp, argv[i], argv[i + 1], copyFlag, + force); + } + Tcl_DStringFree(&targetBuffer); + return result; + } + + /* + * Move each source file into target directory. Extract the basename + * from each source, and append it to the end of the target path. + */ + + for ( ; i < argc - 1; i++) { + char *jargv[2]; + char *source, *newFileName; + Tcl_DString sourceBuffer, newFileNameBuffer; + + source = FileBasename(interp, argv[i], &sourceBuffer); + if (source == NULL) { + result = TCL_ERROR; + break; + } + jargv[0] = argv[argc - 1]; + jargv[1] = source; + Tcl_DStringInit(&newFileNameBuffer); + newFileName = Tcl_JoinPath(2, jargv, &newFileNameBuffer); + result = CopyRenameOneFile(interp, argv[i], newFileName, copyFlag, + force); + Tcl_DStringFree(&sourceBuffer); + Tcl_DStringFree(&newFileNameBuffer); + + if (result == TCL_ERROR) { + break; + } + } + Tcl_DStringFree(&targetBuffer); + return result; +} + +/* + *--------------------------------------------------------------------------- + * + * TclFileMakeDirsCmd + * + * This procedure implements the "mkdir" subcommand of the "file" + * command. Filename arguments need to be translated to native + * format before being passed to platform-specific code that + * implements mkdir functionality. + * + * Results: + * A standard Tcl result. + * + * Side effects: + * See the user documentation. + * + *---------------------------------------------------------------------- + */ +int +TclFileMakeDirsCmd(interp, argc, argv) + Tcl_Interp *interp; /* Used for error reporting. */ + int argc; /* Number of arguments */ + char **argv; /* Argument strings passed to Tcl_FileCmd. */ +{ + Tcl_DString nameBuffer, targetBuffer; + char *errfile; + int result, i, j, pargc; + char **pargv; + struct stat statBuf; + + pargv = NULL; + errfile = NULL; + Tcl_DStringInit(&nameBuffer); + Tcl_DStringInit(&targetBuffer); + + result = TCL_OK; + for (i = 2; i < argc; i++) { + char *name = Tcl_TranslateFileName(interp, argv[i], &nameBuffer); + if (name == NULL) { + result = TCL_ERROR; + break; + } + + Tcl_SplitPath(name, &pargc, &pargv); + if (pargc == 0) { + errno = ENOENT; + errfile = argv[i]; + break; + } + for (j = 0; j < pargc; j++) { + char *target = Tcl_JoinPath(j + 1, pargv, &targetBuffer); + + /* + * Call stat() so that if target is a symlink that points to a + * directory we will create subdirectories in that directory. + */ + + if (stat(target, &statBuf) == 0) { + if (!S_ISDIR(statBuf.st_mode)) { + errno = EEXIST; + errfile = target; + goto done; + } + } else if ((errno != ENOENT) + || (TclpCreateDirectory(target) != TCL_OK)) { + errfile = target; + goto done; + } + Tcl_DStringFree(&targetBuffer); + } + ckfree((char *) pargv); + pargv = NULL; + Tcl_DStringFree(&nameBuffer); + } + + done: + if (errfile != NULL) { + Tcl_AppendResult(interp, "can't create directory \"", + errfile, "\": ", Tcl_PosixError(interp), (char *) NULL); + result = TCL_ERROR; + } + + Tcl_DStringFree(&nameBuffer); + Tcl_DStringFree(&targetBuffer); + if (pargv != NULL) { + ckfree((char *) pargv); + } + return result; +} + +/* + *---------------------------------------------------------------------- + * + * TclFileDeleteCmd + * + * This procedure implements the "delete" subcommand of the "file" + * command. + * + * Results: + * A standard Tcl result. + * + * Side effects: + * See the user documentation. + * + *---------------------------------------------------------------------- + */ + +int +TclFileDeleteCmd(interp, argc, argv) + Tcl_Interp *interp; /* Used for error reporting */ + int argc; /* Number of arguments */ + char **argv; /* Argument strings passed to Tcl_FileCmd. */ +{ + Tcl_DString nameBuffer, errorBuffer; + int i, force, result; + char *errfile; + + i = FileForceOption(interp, argc - 2, argv + 2, &force); + if (i < 0) { + return TCL_ERROR; + } + i += 2; + if ((argc - i) < 1) { + Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], + " ", argv[1], " ?options? file ?file ...?\"", (char *) NULL); + return TCL_ERROR; + } + + errfile = NULL; + result = TCL_OK; + Tcl_DStringInit(&errorBuffer); + Tcl_DStringInit(&nameBuffer); + + for ( ; i < argc; i++) { + struct stat statBuf; + char *name; + + errfile = argv[i]; + Tcl_DStringSetLength(&nameBuffer, 0); + name = Tcl_TranslateFileName(interp, argv[i], &nameBuffer); + if (name == NULL) { + result = TCL_ERROR; + goto done; + } + + /* + * Call lstat() to get info so can delete symbolic link itself. + */ + + if (lstat(name, &statBuf) != 0) { + /* + * Trying to delete a file that does not exist is not + * considered an error, just a no-op + */ + + if (errno != ENOENT) { + result = TCL_ERROR; + } + } else if (S_ISDIR(statBuf.st_mode)) { + result = TclpRemoveDirectory(name, force, &errorBuffer); + if (result != TCL_OK) { + if ((force == 0) && (errno == EEXIST)) { + Tcl_AppendResult(interp, "error deleting \"", argv[i], + "\": directory not empty", (char *) NULL); + Tcl_PosixError(interp); + goto done; + } + + /* + * If possible, use the untranslated name for the file. + */ + + errfile = Tcl_DStringValue(&errorBuffer); + if (strcmp(name, errfile) == 0) { + errfile = argv[i]; + } + } + } else { + result = TclpDeleteFile(name); + } + + if (result == TCL_ERROR) { + break; + } + } + if (result != TCL_OK) { + Tcl_AppendResult(interp, "error deleting \"", errfile, + "\": ", Tcl_PosixError(interp), (char *) NULL); + } + done: + Tcl_DStringFree(&errorBuffer); + Tcl_DStringFree(&nameBuffer); + return result; +} + +/* + *--------------------------------------------------------------------------- + * + * CopyRenameOneFile + * + * Copies or renames specified source file or directory hierarchy + * to the specified target. + * + * Results: + * A standard Tcl result. + * + * Side effects: + * Target is overwritten if the force flag is set. Attempting to + * copy/rename a file onto a directory or a directory onto a file + * will always result in an error. + * + *---------------------------------------------------------------------- + */ + +static int +CopyRenameOneFile(interp, source, target, copyFlag, force) + Tcl_Interp *interp; /* Used for error reporting. */ + char *source; /* Pathname of file to copy. May need to + * be translated. */ + char *target; /* Pathname of file to create/overwrite. + * May need to be translated. */ + int copyFlag; /* If non-zero, copy files. Otherwise, + * rename them. */ + int force; /* If non-zero, overwrite target file if it + * exists. Otherwise, error if target already + * exists. */ +{ + int result; + Tcl_DString sourcePath, targetPath, errorBuffer; + char *targetName, *sourceName, *errfile; + struct stat sourceStatBuf, targetStatBuf; + + sourceName = Tcl_TranslateFileName(interp, source, &sourcePath); + if (sourceName == NULL) { + return TCL_ERROR; + } + targetName = Tcl_TranslateFileName(interp, target, &targetPath); + if (targetName == NULL) { + Tcl_DStringFree(&sourcePath); + return TCL_ERROR; + } + + errfile = NULL; + result = TCL_ERROR; + Tcl_DStringInit(&errorBuffer); + + /* + * We want to copy/rename links and not the files they point to, so we + * use lstat(). If target is a link, we also want to replace the + * link and not the file it points to, so we also use lstat() on the + * target. + */ + + if (lstat(sourceName, &sourceStatBuf) != 0) { + errfile = source; + goto done; + } + if (lstat(targetName, &targetStatBuf) != 0) { + if (errno != ENOENT) { + errfile = target; + goto done; + } + } else { + if (force == 0) { + errno = EEXIST; + errfile = target; + goto done; + } + + /* + * Prevent copying or renaming a file onto itself. Under Windows, + * stat always returns 0 for st_ino. However, the Windows-specific + * code knows how to deal with copying or renaming a file on top of + * itself. It might be a good idea to write a stat that worked. + */ + + if ((sourceStatBuf.st_ino != 0) && (targetStatBuf.st_ino != 0)) { + if ((sourceStatBuf.st_ino == targetStatBuf.st_ino) && + (sourceStatBuf.st_dev == targetStatBuf.st_dev)) { + result = TCL_OK; + goto done; + } + } + + /* + * Prevent copying/renaming a file onto a directory and + * vice-versa. This is a policy decision based on the fact that + * existing implementations of copy and rename on all platforms + * also prevent this. + */ + + if (S_ISDIR(sourceStatBuf.st_mode) + && !S_ISDIR(targetStatBuf.st_mode)) { + errno = EISDIR; + Tcl_AppendResult(interp, "can't overwrite file \"", target, + "\" with directory \"", source, "\"", (char *) NULL); + goto done; + } + if (!S_ISDIR(sourceStatBuf.st_mode) + && S_ISDIR(targetStatBuf.st_mode)) { + errno = EISDIR; + Tcl_AppendResult(interp, "can't overwrite directory \"", target, + "\" with file \"", source, "\"", (char *) NULL); + goto done; + } + } + + if (copyFlag == 0) { + result = TclpRenameFile(sourceName, targetName); + if (result == TCL_OK) { + goto done; + } + + if (errno == EINVAL) { + Tcl_AppendResult(interp, "error renaming \"", source, "\" to \"", + target, "\": trying to rename a volume or ", + "move a directory into itself", (char *) NULL); + goto done; + } else if (errno != EXDEV) { + errfile = target; + goto done; + } + + /* + * The rename failed because the move was across file systems. + * Fall through to copy file and then remove original. Note that + * the low-level TclpRenameFile is allowed to implement + * cross-filesystem moves itself. + */ + } + + if (S_ISDIR(sourceStatBuf.st_mode)) { + result = TclpCopyDirectory(sourceName, targetName, &errorBuffer); + if (result != TCL_OK) { + errfile = Tcl_DStringValue(&errorBuffer); + if (strcmp(errfile, sourceName) == 0) { + errfile = source; + } else if (strcmp(errfile, targetName) == 0) { + errfile = target; + } + } + } else { + result = TclpCopyFile(sourceName, targetName); + if (result != TCL_OK) { + /* + * Well, there really shouldn't be a problem with source, + * because up there we checked to see if it was ok to copy it. + */ + + errfile = target; + } + } + if ((copyFlag == 0) && (result == TCL_OK)) { + if (S_ISDIR(sourceStatBuf.st_mode)) { + result = TclpRemoveDirectory(sourceName, 1, &errorBuffer); + if (result != TCL_OK) { + errfile = Tcl_DStringValue(&errorBuffer); + if (strcmp(errfile, sourceName) == 0) { + errfile = source; + } + } + } else { + result = TclpDeleteFile(sourceName); + if (result != TCL_OK) { + errfile = source; + } + } + if (result != TCL_OK) { + Tcl_AppendResult(interp, "can't unlink \"", errfile, "\": ", + Tcl_PosixError(interp), (char *) NULL); + errfile = NULL; + } + } + + done: + if (errfile != NULL) { + Tcl_AppendResult(interp, + ((copyFlag) ? "error copying \"" : "error renaming \""), + source, (char *) NULL); + if (errfile != source) { + Tcl_AppendResult(interp, "\" to \"", target, (char *) NULL); + if (errfile != target) { + Tcl_AppendResult(interp, "\": \"", errfile, (char *) NULL); + } + } + Tcl_AppendResult(interp, "\": ", Tcl_PosixError(interp), + (char *) NULL); + } + Tcl_DStringFree(&errorBuffer); + Tcl_DStringFree(&sourcePath); + Tcl_DStringFree(&targetPath); + return result; +} + +/* + *--------------------------------------------------------------------------- + * + * FileForceOption -- + * + * Helps parse command line options for file commands that take + * the "-force" and "--" options. + * + * Results: + * The return value is how many arguments from argv were consumed + * by this function, or -1 if there was an error parsing the + * options. If an error occurred, an error message is left in + * interp->result. + * + * Side effects: + * None. + * + *--------------------------------------------------------------------------- + */ + +static int +FileForceOption(interp, argc, argv, forcePtr) + Tcl_Interp *interp; /* Interp, for error return. */ + int argc; /* Number of arguments. */ + char **argv; /* Argument strings. First command line + option, if it exists, begins at */ + int *forcePtr; /* If the "-force" was specified, *forcePtr + * is filled with 1, otherwise with 0. */ +{ + int force, i; + + force = 0; + for (i = 0; i < argc; i++) { + if (argv[i][0] != '-') { + break; + } + if (strcmp(argv[i], "-force") == 0) { + force = 1; + } else if (strcmp(argv[i], "--") == 0) { + i++; + break; + } else { + Tcl_AppendResult(interp, "bad option \"", argv[i], + "\": should be -force or --", (char *)NULL); + return -1; + } + } + *forcePtr = force; + return i; +} +/* + *--------------------------------------------------------------------------- + * + * FileBasename -- + * + * Given a path in either tcl format (with / separators), or in the + * platform-specific format for the current platform, return all the + * characters in the path after the last directory separator. But, + * if path is the root directory, returns no characters. + * + * Results: + * Appends the string that represents the basename to the end of + * the specified initialized DString, returning a pointer to the + * resulting string. If there is an error, an error message is left + * in interp, NULL is returned, and the Tcl_DString is unmodified. + * + * Side effects: + * None. + * + *--------------------------------------------------------------------------- + */ + +static char * +FileBasename(interp, path, bufferPtr) + Tcl_Interp *interp; /* Interp, for error return. */ + char *path; /* Path whose basename to extract. */ + Tcl_DString *bufferPtr; /* Initialized DString that receives + * basename. */ +{ + int argc; + char **argv; + + Tcl_SplitPath(path, &argc, &argv); + if (argc == 0) { + Tcl_DStringInit(bufferPtr); + } else { + if ((argc == 1) && (*path == '~')) { + Tcl_DString buffer; + + ckfree((char *) argv); + path = Tcl_TranslateFileName(interp, path, &buffer); + if (path == NULL) { + return NULL; + } + Tcl_SplitPath(path, &argc, &argv); + Tcl_DStringFree(&buffer); + } + Tcl_DStringInit(bufferPtr); + + /* + * Return the last component, unless it is the only component, and it + * is the root of an absolute path. + */ + + if (argc > 0) { + if ((argc > 1) + || (Tcl_GetPathType(argv[0]) == TCL_PATH_RELATIVE)) { + Tcl_DStringAppend(bufferPtr, argv[argc - 1], -1); + } + } + } + ckfree((char *) argv); + return Tcl_DStringValue(bufferPtr); +} + +/* + *---------------------------------------------------------------------- + * + * TclFileAttrsCmd -- + * + * Sets or gets the platform-specific attributes of a file. The objc-objv + * points to the file name with the rest of the command line following. + * This routine uses platform-specific tables of option strings + * and callbacks. The callback to get the attributes take three + * parameters: + * Tcl_Interp *interp; The interp to report errors with. + * Since this is an object-based API, + * the object form of the result should be + * used. + * CONST char *fileName; This is extracted using + * Tcl_TranslateFileName. + * TclObj **attrObjPtrPtr; A new object to hold the attribute + * is allocated and put here. + * The first two parameters of the callback used to write out the + * attributes are the same. The third parameter is: + * CONST *attrObjPtr; A pointer to the object that has + * the new attribute. + * They both return standard TCL errors; if the routine to get + * an attribute fails, no object is allocated and *attrObjPtrPtr + * is unchanged. + * + * Results: + * Standard TCL error. + * + * Side effects: + * May set file attributes for the file name. + * + *---------------------------------------------------------------------- + */ + +int +TclFileAttrsCmd(interp, objc, objv) + Tcl_Interp *interp; /* The interpreter for error reporting. */ + int objc; /* Number of command line arguments. */ + Tcl_Obj *CONST objv[]; /* The command line objects. */ +{ + Tcl_Obj *resultPtr = Tcl_GetObjResult(interp); + char *fileName; + int length, index; + Tcl_Obj *listObjPtr; + Tcl_Obj *elementObjPtr; + Tcl_DString buffer; + + if ((objc > 2) && ((objc % 2) == 0)) { + Tcl_AppendStringsToObj(resultPtr, + "wrong # args: must be \"file attributes name ?option? ?value? ?option value? ...\"", + (char *) NULL); + return TCL_ERROR; + } + + fileName = Tcl_GetStringFromObj(objv[0], &length); + if (Tcl_TranslateFileName(interp, fileName, &buffer) == NULL) { + return TCL_ERROR; + } + fileName = Tcl_DStringValue(&buffer); + + if (objc == 1) { + listObjPtr = Tcl_NewListObj(0, (Tcl_Obj **) NULL); + + for (index = 0; tclpFileAttrStrings[index] != NULL; index++) { + elementObjPtr = Tcl_NewStringObj(tclpFileAttrStrings[index], -1); + Tcl_ListObjAppendElement(interp, listObjPtr, elementObjPtr); + if ((*tclpFileAttrProcs[index].getProc)(interp, index, fileName, + &elementObjPtr) != TCL_OK) { + Tcl_DecrRefCount(listObjPtr); + return TCL_ERROR; + } + Tcl_ListObjAppendElement(interp, listObjPtr, elementObjPtr); + } + Tcl_SetObjResult(interp, listObjPtr); + } else if (objc == 2) { + if (Tcl_GetIndexFromObj(interp, objv[1], tclpFileAttrStrings, "option", + 0, &index) != TCL_OK) { + return TCL_ERROR; + } + if ((*tclpFileAttrProcs[index].getProc)(interp, index, fileName, + &elementObjPtr) != TCL_OK) { + return TCL_ERROR; + } + Tcl_SetObjResult(interp, elementObjPtr); + } else { + int i; + + for (i = 1; i < objc ; i += 2) { + if (Tcl_GetIndexFromObj(interp, objv[i], tclpFileAttrStrings, "option", + 0, &index) != TCL_OK) { + return TCL_ERROR; + } + if ((*tclpFileAttrProcs[index].setProc)(interp, index, fileName, + objv[i + 1]) != TCL_OK) { + return TCL_ERROR; + } + } + } + + Tcl_DStringFree(&buffer); + + return TCL_OK; +} |