archie/tcl7.6/generic/tclFCmd.c
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/*
* tclFCmd.c
*
* This file implements the generic portion of file manipulation
* subcommands of the "file" command.
*
* Copyright (c) 1996 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 1.12 96/10/08 17:25:34
*/
#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);
}