tclFCmd.c Go to the documentation of this file. /* * tclFCmd.c * * This file implements the generic 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: tclFCmd.c,v 1.43 2007/12/13 15:23:17 dgp Exp $ */ #include "tclInt.h" /* * Declarations for local functions defined in this file: */ static int CopyRenameOneFile(Tcl_Interp *interp, Tcl_Obj *srcPathPtr, Tcl_Obj *destPathPtr, int copyFlag, int force); static Tcl_Obj * FileBasename(Tcl_Interp *interp, Tcl_Obj *pathPtr); static int FileCopyRename(Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[], int copyFlag); static int FileForceOption(Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[], int *forcePtr);  /* *--------------------------------------------------------------------------- * * TclFileRenameCmd * * This function 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( Tcl_Interp *interp, /* Interp for error reporting or recursive * calls in the case of a tricky rename. */ int objc, /* Number of arguments. */ Tcl_Obj *CONST objv[]) /* Argument strings passed to Tcl_FileCmd. */ { return FileCopyRename(interp, objc, objv, 0); }  /* *--------------------------------------------------------------------------- * * TclFileCopyCmd * * This function 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( Tcl_Interp *interp, /* Used for error reporting or recursive calls * in the case of a tricky copy. */ int objc, /* Number of arguments. */ Tcl_Obj *CONST objv[]) /* Argument strings passed to Tcl_FileCmd. */ { return FileCopyRename(interp, objc, objv, 1); }  /* *--------------------------------------------------------------------------- * * FileCopyRename -- * * Performs the work of TclFileRenameCmd and TclFileCopyCmd. See * comments for those functions. * * Results: * See above. * * Side effects: * See above. * *--------------------------------------------------------------------------- */ static int FileCopyRename( Tcl_Interp *interp, /* Used for error reporting. */ int objc, /* Number of arguments. */ Tcl_Obj *CONST objv[], /* Argument strings passed to Tcl_FileCmd. */ int copyFlag) /* If non-zero, copy source(s). Otherwise, * rename them. */ { int i, result, force; Tcl_StatBuf statBuf; Tcl_Obj *target; i = FileForceOption(interp, objc - 2, objv + 2, &force); if (i < 0) { return TCL_ERROR; } i += 2; if ((objc - i) < 2) { Tcl_AppendResult(interp, "wrong # args: should be \"", TclGetString(objv[0]), " ", TclGetString(objv[1]), " ?options? source ?source ...? target\"", 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 = objv[objc - 1]; if (Tcl_FSConvertToPathType(interp, target) != TCL_OK) { return TCL_ERROR; } result = TCL_OK; /* * Call Tcl_FSStat() 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 ((Tcl_FSStat(target, &statBuf) != 0) || !S_ISDIR(statBuf.st_mode)) { if ((objc - i) > 2) { errno = ENOTDIR; Tcl_PosixError(interp); Tcl_AppendResult(interp, "error ", (copyFlag ? "copying" : "renaming"), ": target \"", TclGetString(target), "\" is not a directory", NULL); result = TCL_ERROR; } else { /* * Even though already have target == translated(objv[i+1]), pass * the original argument down, so if there's an error, the error * message will reflect the original arguments. */ result = CopyRenameOneFile(interp, objv[i], objv[i + 1], copyFlag, force); } 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<objc-1 ; i++) { Tcl_Obj *jargv[2]; Tcl_Obj *source, *newFileName; Tcl_Obj *temp; source = FileBasename(interp, objv[i]); if (source == NULL) { result = TCL_ERROR; break; } jargv[0] = objv[objc - 1]; jargv[1] = source; temp = Tcl_NewListObj(2, jargv); newFileName = Tcl_FSJoinPath(temp, -1); Tcl_IncrRefCount(newFileName); result = CopyRenameOneFile(interp, objv[i], newFileName, copyFlag, force); Tcl_DecrRefCount(newFileName); Tcl_DecrRefCount(temp); Tcl_DecrRefCount(source); if (result == TCL_ERROR) { break; } } return result; }  /* *--------------------------------------------------------------------------- * * TclFileMakeDirsCmd * * This function 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( Tcl_Interp *interp, /* Used for error reporting. */ int objc, /* Number of arguments */ Tcl_Obj *CONST objv[]) /* Argument strings passed to Tcl_FileCmd. */ { Tcl_Obj *errfile; int result, i, j, pobjc; Tcl_Obj *split = NULL; Tcl_Obj *target = NULL; Tcl_StatBuf statBuf; errfile = NULL; result = TCL_OK; for (i = 2; i < objc; i++) { if (Tcl_FSConvertToPathType(interp, objv[i]) != TCL_OK) { result = TCL_ERROR; break; } split = Tcl_FSSplitPath(objv[i],&pobjc); Tcl_IncrRefCount(split); if (pobjc == 0) { errno = ENOENT; errfile = objv[i]; break; } for (j = 0; j < pobjc; j++) { target = Tcl_FSJoinPath(split, j + 1); Tcl_IncrRefCount(target); /* * Call Tcl_FSStat() so that if target is a symlink that points to * a directory we will create subdirectories in that directory. */ if (Tcl_FSStat(target, &statBuf) == 0) { if (!S_ISDIR(statBuf.st_mode)) { errno = EEXIST; errfile = target; goto done; } } else if (errno != ENOENT) { /* * If Tcl_FSStat() failed and the error is anything other than * non-existence of the target, throw the error. */ errfile = target; goto done; } else if (Tcl_FSCreateDirectory(target) != TCL_OK) { /* * Create might have failed because of being in a race * condition with another process trying to create the same * subdirectory. */ if (errno == EEXIST) { if ((Tcl_FSStat(target, &statBuf) == 0) && S_ISDIR(statBuf.st_mode)) { /* * It is a directory that wasn't there before, so keep * going without error. */ Tcl_ResetResult(interp); } else { errfile = target; goto done; } } else { errfile = target; goto done; } } /* * Forget about this sub-path. */ Tcl_DecrRefCount(target); target = NULL; } Tcl_DecrRefCount(split); split = NULL; } done: if (errfile != NULL) { Tcl_AppendResult(interp, "can't create directory \"", TclGetString(errfile), "\": ", Tcl_PosixError(interp), NULL); result = TCL_ERROR; } if (split != NULL) { Tcl_DecrRefCount(split); } if (target != NULL) { Tcl_DecrRefCount(target); } return result; }  /* *---------------------------------------------------------------------- * * TclFileDeleteCmd * * This function implements the "delete" subcommand of the "file" * command. * * Results: * A standard Tcl result. * * Side effects: * See the user documentation. * *---------------------------------------------------------------------- */ int TclFileDeleteCmd( Tcl_Interp *interp, /* Used for error reporting */ int objc, /* Number of arguments */ Tcl_Obj *CONST objv[]) /* Argument strings passed to Tcl_FileCmd. */ { int i, force, result; Tcl_Obj *errfile; Tcl_Obj *errorBuffer = NULL; i = FileForceOption(interp, objc - 2, objv + 2, &force); if (i < 0) { return TCL_ERROR; } i += 2; if ((objc - i) < 1) { Tcl_AppendResult(interp, "wrong # args: should be \"", TclGetString(objv[0]), " ", TclGetString(objv[1]), " ?options? file ?file ...?\"", NULL); return TCL_ERROR; } errfile = NULL; result = TCL_OK; for ( ; i < objc; i++) { Tcl_StatBuf statBuf; errfile = objv[i]; if (Tcl_FSConvertToPathType(interp, objv[i]) != TCL_OK) { result = TCL_ERROR; goto done; } /* * Call lstat() to get info so can delete symbolic link itself. */ if (Tcl_FSLstat(objv[i], &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)) { /* * We own a reference count on errorBuffer, if it was set as a * result of this call. */ result = Tcl_FSRemoveDirectory(objv[i], force, &errorBuffer); if (result != TCL_OK) { if ((force == 0) && (errno == EEXIST)) { Tcl_AppendResult(interp, "error deleting \"", TclGetString(objv[i]), "\": directory not empty", NULL); Tcl_PosixError(interp); goto done; } /* * If possible, use the untranslated name for the file. */ errfile = errorBuffer; /* * FS supposed to check between translated objv and errfile. */ if (Tcl_FSEqualPaths(objv[i], errfile)) { errfile = objv[i]; } } } else { result = Tcl_FSDeleteFile(objv[i]); } if (result != TCL_OK) { result = TCL_ERROR; /* * It is important that we break on error, otherwise we might end * up owning reference counts on numerous errorBuffers. */ break; } } if (result != TCL_OK) { if (errfile == NULL) { /* * We try to accomodate poor error results from our Tcl_FS calls. */ Tcl_AppendResult(interp, "error deleting unknown file: ", Tcl_PosixError(interp), NULL); } else { Tcl_AppendResult(interp, "error deleting \"", TclGetString(errfile), "\": ", Tcl_PosixError(interp), NULL); } } done: if (errorBuffer != NULL) { Tcl_DecrRefCount(errorBuffer); } 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( Tcl_Interp *interp, /* Used for error reporting. */ Tcl_Obj *source, /* Pathname of file to copy. May need to be * translated. */ Tcl_Obj *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_Obj *errfile, *errorBuffer; Tcl_Obj *actualSource=NULL; /* If source is a link, then this is the real * file/directory. */ Tcl_StatBuf sourceStatBuf, targetStatBuf; if (Tcl_FSConvertToPathType(interp, source) != TCL_OK) { return TCL_ERROR; } if (Tcl_FSConvertToPathType(interp, target) != TCL_OK) { return TCL_ERROR; } errfile = NULL; errorBuffer = NULL; result = TCL_ERROR; /* * 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 (Tcl_FSLstat(source, &sourceStatBuf) != 0) { errfile = source; goto done; } if (Tcl_FSLstat(target, &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 \"", TclGetString(target), "\" with directory \"", TclGetString(source), "\"", NULL); goto done; } if (!S_ISDIR(sourceStatBuf.st_mode) && S_ISDIR(targetStatBuf.st_mode)) { errno = EISDIR; Tcl_AppendResult(interp, "can't overwrite directory \"", TclGetString(target), "\" with file \"", TclGetString(source), "\"", NULL); goto done; } /* * The destination exists, but appears to be ok to over-write, and * -force is given. We now try to adjust permissions to ensure the * operation succeeds. If we can't adjust permissions, we'll let the * actual copy/rename return an error later. */ { Tcl_Obj *perm; int index; TclNewLiteralStringObj(perm, "u+w"); Tcl_IncrRefCount(perm); if (TclFSFileAttrIndex(target, "-permissions", &index) == TCL_OK) { Tcl_FSFileAttrsSet(NULL, index, target, perm); } Tcl_DecrRefCount(perm); } } if (copyFlag == 0) { result = Tcl_FSRenameFile(source, target); if (result == TCL_OK) { goto done; } if (errno == EINVAL) { Tcl_AppendResult(interp, "error renaming \"", TclGetString(source), "\" to \"", TclGetString(target), "\": trying to rename a volume or " "move a directory into itself", 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 Tcl_FSRenameFileProc in the filesystem is allowed to * implement cross-filesystem moves itself, if it desires. */ } actualSource = source; Tcl_IncrRefCount(actualSource); /* * Activate the following block to copy files instead of links. However * Tcl's semantics currently say we should copy links, so any such change * should be the subject of careful study on the consequences. * * Perhaps there could be an optional flag to 'file copy' to dictate which * approach to use, with the default being _not_ to have this block * active. */ #if 0 #ifdef S_ISLNK if (copyFlag && S_ISLNK(sourceStatBuf.st_mode)) { /* * We want to copy files not links. Therefore we must follow the link. * There are two purposes to this 'stat' call here. First we want to * know if the linked-file/dir actually exists, and second, in the * block of code which follows, some 20 lines down, we want to check * if the thing is a file or directory. */ if (Tcl_FSStat(source, &sourceStatBuf) != 0) { /* * Actual file doesn't exist. */ Tcl_AppendResult(interp, "error copying \"", TclGetString(source), "\": the target of this link doesn't exist", NULL); goto done; } else { int counter = 0; while (1) { Tcl_Obj *path = Tcl_FSLink(actualSource, NULL, 0); if (path == NULL) { break; } /* * Now we want to check if this is a relative path, and if so, * to make it absolute. */ if (Tcl_FSGetPathType(path) == TCL_PATH_RELATIVE) { Tcl_Obj *abs = Tcl_FSJoinToPath(actualSource, 1, &path); if (abs == NULL) { break; } Tcl_IncrRefCount(abs); Tcl_DecrRefCount(path); path = abs; } Tcl_DecrRefCount(actualSource); actualSource = path; counter++; /* * Arbitrary limit of 20 links to follow. */ if (counter > 20) { /* * Too many links. */ Tcl_SetErrno(EMLINK); errfile = source; goto done; } } /* Now 'actualSource' is the correct file */ } } #endif /* S_ISLNK */ #endif if (S_ISDIR(sourceStatBuf.st_mode)) { result = Tcl_FSCopyDirectory(actualSource, target, &errorBuffer); if (result != TCL_OK) { if (errno == EXDEV) { /* * The copy failed because we're trying to do a * cross-filesystem copy. We do this through our Tcl library. */ Tcl_Obj *copyCommand, *cmdObj, *opObj; TclNewObj(copyCommand); TclNewLiteralStringObj(cmdObj, "::tcl::CopyDirectory"); Tcl_ListObjAppendElement(interp, copyCommand, cmdObj); if (copyFlag) { TclNewLiteralStringObj(opObj, "copying"); } else { TclNewLiteralStringObj(opObj, "renaming"); } Tcl_ListObjAppendElement(interp, copyCommand, opObj); Tcl_ListObjAppendElement(interp, copyCommand, source); Tcl_ListObjAppendElement(interp, copyCommand, target); Tcl_IncrRefCount(copyCommand); result = Tcl_EvalObjEx(interp, copyCommand, TCL_EVAL_GLOBAL | TCL_EVAL_DIRECT); Tcl_DecrRefCount(copyCommand); if (result != TCL_OK) { /* * There was an error in the Tcl-level copy. We will pass * on the Tcl error message and can ensure this by setting * errfile to NULL */ errfile = NULL; } } else { errfile = errorBuffer; if (Tcl_FSEqualPaths(errfile, source)) { errfile = source; } else if (Tcl_FSEqualPaths(errfile, target)) { errfile = target; } } } } else { result = Tcl_FSCopyFile(actualSource, target); if ((result != TCL_OK) && (errno == EXDEV)) { result = TclCrossFilesystemCopy(interp, source, target); } if (result != TCL_OK) { /* * We could examine 'errno' to double-check if the problem was * with the target, but we checked the source above, so it should * be quite clear */ errfile = target; /* * We now need to reset the result, because the above call, if it * failed, may have put an error message in place. (Ideally we * would prefer not to pass an interpreter in above, but the * channel IO code used by TclCrossFilesystemCopy currently * requires one). */ Tcl_ResetResult(interp); } } if ((copyFlag == 0) && (result == TCL_OK)) { if (S_ISDIR(sourceStatBuf.st_mode)) { result = Tcl_FSRemoveDirectory(source, 1, &errorBuffer); if (result != TCL_OK) { if (Tcl_FSEqualPaths(errfile, source) == 0) { errfile = source; } } } else { result = Tcl_FSDeleteFile(source); if (result != TCL_OK) { errfile = source; } } if (result != TCL_OK) { Tcl_AppendResult(interp, "can't unlink \"", TclGetString(errfile), "\": ", Tcl_PosixError(interp), NULL); errfile = NULL; } } done: if (errfile != NULL) { Tcl_AppendResult(interp, "error ", (copyFlag ? "copying" : "renaming"), " \"", TclGetString(source), NULL); if (errfile != source) { Tcl_AppendResult(interp, "\" to \"", TclGetString(target), NULL); if (errfile != target) { Tcl_AppendResult(interp, "\": \"", TclGetString(errfile),NULL); } } Tcl_AppendResult(interp, "\": ", Tcl_PosixError(interp), NULL); } if (errorBuffer != NULL) { Tcl_DecrRefCount(errorBuffer); } if (actualSource != NULL) { Tcl_DecrRefCount(actualSource); } 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 the interp's result. * * Side effects: * None. * *--------------------------------------------------------------------------- */ static int FileForceOption( Tcl_Interp *interp, /* Interp, for error return. */ int objc, /* Number of arguments. */ Tcl_Obj *CONST objv[], /* Argument strings. First command line * option, if it exists, begins at 0. */ int *forcePtr) /* If the "-force" was specified, *forcePtr is * filled with 1, otherwise with 0. */ { int force, i; force = 0; for (i = 0; i < objc; i++) { if (TclGetString(objv[i])[0] != '-') { break; } if (strcmp(TclGetString(objv[i]), "-force") == 0) { force = 1; } else if (strcmp(TclGetString(objv[i]), "--") == 0) { i++; break; } else { Tcl_AppendResult(interp, "bad option \"", TclGetString(objv[i]), "\": should be -force or --", 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: * Returns the string object that represents the basename. If there is an * error, an error message is left in interp, and NULL is returned. * * Side effects: * None. * *--------------------------------------------------------------------------- */ static Tcl_Obj * FileBasename( Tcl_Interp *interp, /* Interp, for error return. */ Tcl_Obj *pathPtr) /* Path whose basename to extract. */ { int objc; Tcl_Obj *splitPtr; Tcl_Obj *resultPtr = NULL; splitPtr = Tcl_FSSplitPath(pathPtr, &objc); Tcl_IncrRefCount(splitPtr); if (objc != 0) { if ((objc == 1) && (*TclGetString(pathPtr) == '~')) { Tcl_DecrRefCount(splitPtr); if (Tcl_FSConvertToPathType(interp, pathPtr) != TCL_OK) { return NULL; } splitPtr = Tcl_FSSplitPath(pathPtr, &objc); Tcl_IncrRefCount(splitPtr); } /* * Return the last component, unless it is the only component, and it * is the root of an absolute path. */ if (objc > 0) { Tcl_ListObjIndex(NULL, splitPtr, objc-1, &resultPtr); if ((objc == 1) && (Tcl_FSGetPathType(resultPtr) != TCL_PATH_RELATIVE)) { resultPtr = NULL; } } } if (resultPtr == NULL) { resultPtr = Tcl_NewObj(); } Tcl_IncrRefCount(resultPtr); Tcl_DecrRefCount(splitPtr); return resultPtr; }  /* *---------------------------------------------------------------------- * * 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( Tcl_Interp *interp, /* The interpreter for error reporting. */ int objc, /* Number of command line arguments. */ Tcl_Obj *CONST objv[]) /* The command line objects. */ { int result; CONST char ** attributeStrings; Tcl_Obj* objStrings = NULL; int numObjStrings = -1; Tcl_Obj *filePtr; if (objc < 3) { Tcl_WrongNumArgs(interp, 2, objv, "name ?option? ?value? ?option value ...?"); return TCL_ERROR; } filePtr = objv[2]; if (Tcl_FSConvertToPathType(interp, filePtr) != TCL_OK) { return TCL_ERROR; } objc -= 3; objv += 3; result = TCL_ERROR; Tcl_SetErrno(0); attributeStrings = Tcl_FSFileAttrStrings(filePtr, &objStrings); if (attributeStrings == NULL) { int index; Tcl_Obj *objPtr; if (objStrings == NULL) { if (Tcl_GetErrno() != 0) { /* * There was an error, probably that the filePtr is not * accepted by any filesystem */ Tcl_AppendResult(interp, "could not read \"", TclGetString(filePtr), "\": ", Tcl_PosixError(interp), NULL); return TCL_ERROR; } goto end; } /* * We own the object now. */ Tcl_IncrRefCount(objStrings); /* * Use objStrings as a list object. */ if (Tcl_ListObjLength(interp, objStrings, &numObjStrings) != TCL_OK) { goto end; } attributeStrings = (CONST char **) TclStackAlloc(interp, (1+numObjStrings) * sizeof(char*)); for (index = 0; index < numObjStrings; index++) { Tcl_ListObjIndex(interp, objStrings, index, &objPtr); attributeStrings[index] = TclGetString(objPtr); } attributeStrings[index] = NULL; } if (objc == 0) { /* * Get all attributes. */ int index, res = TCL_OK, nbAtts = 0; Tcl_Obj *listPtr; listPtr = Tcl_NewListObj(0, NULL); for (index = 0; attributeStrings[index] != NULL; index++) { Tcl_Obj *objPtrAttr; if (res != TCL_OK) { /* * Clear the error from the last iteration. */ Tcl_ResetResult(interp); } res = Tcl_FSFileAttrsGet(interp, index, filePtr, &objPtrAttr); if (res == TCL_OK) { Tcl_Obj *objPtr = Tcl_NewStringObj(attributeStrings[index], -1); Tcl_ListObjAppendElement(interp, listPtr, objPtr); Tcl_ListObjAppendElement(interp, listPtr, objPtrAttr); nbAtts++; } } if (index > 0 && nbAtts == 0) { /* * Error: no valid attributes found. */ Tcl_DecrRefCount(listPtr); goto end; } Tcl_SetObjResult(interp, listPtr); } else if (objc == 1) { /* * Get one attribute. */ int index; Tcl_Obj *objPtr = NULL; if (numObjStrings == 0) { Tcl_AppendResult(interp, "bad option \"", TclGetString(objv[0]), "\", there are no file attributes in this filesystem.", NULL); goto end; } if (Tcl_GetIndexFromObj(interp, objv[0], attributeStrings, "option", 0, &index) != TCL_OK) { goto end; } if (Tcl_FSFileAttrsGet(interp, index, filePtr, &objPtr) != TCL_OK) { goto end; } Tcl_SetObjResult(interp, objPtr); } else { /* * Set option/value pairs. */ int i, index; if (numObjStrings == 0) { Tcl_AppendResult(interp, "bad option \"", TclGetString(objv[0]), "\", there are no file attributes in this filesystem.", NULL); goto end; } for (i = 0; i < objc ; i += 2) { if (Tcl_GetIndexFromObj(interp, objv[i], attributeStrings, "option", 0, &index) != TCL_OK) { goto end; } if (i + 1 == objc) { Tcl_AppendResult(interp, "value for \"", TclGetString(objv[i]), "\" missing", NULL); goto end; } if (Tcl_FSFileAttrsSet(interp, index, filePtr, objv[i + 1]) != TCL_OK) { goto end; } } } result = TCL_OK; end: if (numObjStrings != -1) { /* * Free up the array we allocated. */ TclStackFree(interp, (void *)attributeStrings); /* * We don't need this object that was passed to us any more. */ if (objStrings != NULL) { Tcl_DecrRefCount(objStrings); } } return result; }  /* * Local Variables: * mode: c * c-basic-offset: 4 * fill-column: 78 * End: */

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