711 lines
19 KiB
C
711 lines
19 KiB
C
/*
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* tclFCmd.c
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*
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* This file implements the generic portion of file manipulation
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* subcommands of the "file" command.
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*
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* Copyright (c) 1996 Sun Microsystems, Inc.
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*
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* See the file "license.terms" for information on usage and redistribution
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* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
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*
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* SCCS: @(#) tclFCmd.c 1.12 96/10/08 17:25:34
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*/
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#include "tclInt.h"
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#include "tclPort.h"
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/*
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* Declarations for local procedures defined in this file:
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*/
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static int CopyRenameOneFile _ANSI_ARGS_((Tcl_Interp *interp,
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char *source, char *dest, int copyFlag,
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int force));
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static char * FileBasename _ANSI_ARGS_((Tcl_Interp *interp,
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char *path, Tcl_DString *bufferPtr));
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static int FileCopyRename _ANSI_ARGS_((Tcl_Interp *interp,
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int argc, char **argv, int copyFlag));
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static int FileForceOption _ANSI_ARGS_((Tcl_Interp *interp,
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int argc, char **argv, int *forcePtr));
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/*
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*---------------------------------------------------------------------------
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*
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* TclFileRenameCmd
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*
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* This procedure implements the "rename" subcommand of the "file"
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* command. Filename arguments need to be translated to native
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* format before being passed to platform-specific code that
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* implements rename functionality.
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*
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* Results:
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* A standard Tcl result.
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*
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* Side effects:
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* See the user documentation.
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*
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*---------------------------------------------------------------------------
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*/
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int
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TclFileRenameCmd(interp, argc, argv)
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Tcl_Interp *interp; /* Interp for error reporting. */
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int argc; /* Number of arguments. */
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char **argv; /* Argument strings passed to Tcl_FileCmd. */
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{
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return FileCopyRename(interp, argc, argv, 0);
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}
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/*
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*---------------------------------------------------------------------------
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*
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* TclFileCopyCmd
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*
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* This procedure implements the "copy" subcommand of the "file"
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* command. Filename arguments need to be translated to native
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* format before being passed to platform-specific code that
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* implements copy functionality.
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*
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* Results:
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* A standard Tcl result.
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*
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* Side effects:
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* See the user documentation.
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*
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*---------------------------------------------------------------------------
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*/
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int
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TclFileCopyCmd(interp, argc, argv)
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Tcl_Interp *interp; /* Used for error reporting */
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int argc; /* Number of arguments. */
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char **argv; /* Argument strings passed to Tcl_FileCmd. */
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{
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return FileCopyRename(interp, argc, argv, 1);
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}
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/*
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*---------------------------------------------------------------------------
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*
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* FileCopyRename --
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*
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* Performs the work of TclFileRenameCmd and TclFileCopyCmd.
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* See comments for those procedures.
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*
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* Results:
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* See above.
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*
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* Side effects:
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* See above.
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*
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*---------------------------------------------------------------------------
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*/
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static int
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FileCopyRename(interp, argc, argv, copyFlag)
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Tcl_Interp *interp; /* Used for error reporting. */
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int argc; /* Number of arguments. */
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char **argv; /* Argument strings passed to Tcl_FileCmd. */
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int copyFlag; /* If non-zero, copy source(s). Otherwise,
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* rename them. */
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{
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int i, result, force;
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struct stat statBuf;
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Tcl_DString targetBuffer;
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char *target;
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i = FileForceOption(interp, argc - 2, argv + 2, &force);
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if (i < 0) {
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return TCL_ERROR;
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}
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i += 2;
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if ((argc - i) < 2) {
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Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
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" ", argv[1], " ?options? source ?source ...? target\"",
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(char *) NULL);
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return TCL_ERROR;
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}
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/*
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* If target doesn't exist or isn't a directory, try the copy/rename.
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* More than 2 arguments is only valid if the target is an existing
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* directory.
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*/
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target = Tcl_TranslateFileName(interp, argv[argc - 1], &targetBuffer);
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if (target == NULL) {
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return TCL_ERROR;
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}
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result = TCL_OK;
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/*
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* Call stat() so that if target is a symlink that points to a directory
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* we will put the sources in that directory instead of overwriting the
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* symlink.
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*/
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if ((stat(target, &statBuf) != 0) || !S_ISDIR(statBuf.st_mode)) {
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if ((argc - i) > 2) {
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errno = ENOTDIR;
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Tcl_PosixError(interp);
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Tcl_AppendResult(interp, "error ",
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((copyFlag) ? "copying" : "renaming"), ": target \"",
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argv[argc - 1], "\" is not a directory", (char *) NULL);
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result = TCL_ERROR;
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} else {
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/*
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* Even though already have target == translated(argv[i+1]),
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* pass the original argument down, so if there's an error, the
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* error message will reflect the original arguments.
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*/
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result = CopyRenameOneFile(interp, argv[i], argv[i + 1], copyFlag,
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force);
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}
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Tcl_DStringFree(&targetBuffer);
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return result;
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}
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/*
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* Move each source file into target directory. Extract the basename
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* from each source, and append it to the end of the target path.
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*/
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for ( ; i < argc - 1; i++) {
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char *jargv[2];
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char *source, *newFileName;
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Tcl_DString sourceBuffer, newFileNameBuffer;
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source = FileBasename(interp, argv[i], &sourceBuffer);
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if (source == NULL) {
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result = TCL_ERROR;
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break;
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}
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jargv[0] = argv[argc - 1];
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jargv[1] = source;
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Tcl_DStringInit(&newFileNameBuffer);
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newFileName = Tcl_JoinPath(2, jargv, &newFileNameBuffer);
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result = CopyRenameOneFile(interp, argv[i], newFileName, copyFlag,
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force);
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Tcl_DStringFree(&sourceBuffer);
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Tcl_DStringFree(&newFileNameBuffer);
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if (result == TCL_ERROR) {
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break;
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}
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}
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Tcl_DStringFree(&targetBuffer);
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return result;
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}
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/*
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*---------------------------------------------------------------------------
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*
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* TclFileMakeDirsCmd
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*
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* This procedure implements the "mkdir" subcommand of the "file"
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* command. Filename arguments need to be translated to native
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* format before being passed to platform-specific code that
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* implements mkdir functionality.
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*
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* Results:
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* A standard Tcl result.
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*
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* Side effects:
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* See the user documentation.
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*
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*----------------------------------------------------------------------
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*/
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int
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TclFileMakeDirsCmd(interp, argc, argv)
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Tcl_Interp *interp; /* Used for error reporting. */
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int argc; /* Number of arguments */
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char **argv; /* Argument strings passed to Tcl_FileCmd. */
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{
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Tcl_DString nameBuffer, targetBuffer;
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char *errfile;
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int result, i, j, pargc;
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char **pargv;
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struct stat statBuf;
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pargv = NULL;
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errfile = NULL;
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Tcl_DStringInit(&nameBuffer);
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Tcl_DStringInit(&targetBuffer);
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result = TCL_OK;
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for (i = 2; i < argc; i++) {
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char *name = Tcl_TranslateFileName(interp, argv[i], &nameBuffer);
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if (name == NULL) {
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result = TCL_ERROR;
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break;
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}
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Tcl_SplitPath(name, &pargc, &pargv);
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if (pargc == 0) {
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errno = ENOENT;
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errfile = argv[i];
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break;
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}
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for (j = 0; j < pargc; j++) {
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char *target = Tcl_JoinPath(j + 1, pargv, &targetBuffer);
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/*
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* Call stat() so that if target is a symlink that points to a
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* directory we will create subdirectories in that directory.
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*/
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if (stat(target, &statBuf) == 0) {
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if (!S_ISDIR(statBuf.st_mode)) {
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errno = EEXIST;
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errfile = target;
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goto done;
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}
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} else if ((errno != ENOENT)
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|| (TclpCreateDirectory(target) != TCL_OK)) {
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errfile = target;
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goto done;
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}
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Tcl_DStringFree(&targetBuffer);
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}
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ckfree((char *) pargv);
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pargv = NULL;
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Tcl_DStringFree(&nameBuffer);
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}
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done:
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if (errfile != NULL) {
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Tcl_AppendResult(interp, "can't create directory \"",
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errfile, "\": ", Tcl_PosixError(interp), (char *) NULL);
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result = TCL_ERROR;
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}
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Tcl_DStringFree(&nameBuffer);
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Tcl_DStringFree(&targetBuffer);
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if (pargv != NULL) {
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ckfree((char *) pargv);
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}
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return result;
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}
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/*
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*----------------------------------------------------------------------
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*
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* TclFileDeleteCmd
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*
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* This procedure implements the "delete" subcommand of the "file"
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* command.
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*
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* Results:
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* A standard Tcl result.
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*
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* Side effects:
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* See the user documentation.
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*
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*----------------------------------------------------------------------
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*/
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int
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TclFileDeleteCmd(interp, argc, argv)
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Tcl_Interp *interp; /* Used for error reporting */
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int argc; /* Number of arguments */
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char **argv; /* Argument strings passed to Tcl_FileCmd. */
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{
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Tcl_DString nameBuffer, errorBuffer;
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int i, force, result;
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char *errfile;
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i = FileForceOption(interp, argc - 2, argv + 2, &force);
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if (i < 0) {
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return TCL_ERROR;
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}
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i += 2;
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if ((argc - i) < 1) {
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Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
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" ", argv[1], " ?options? file ?file ...?\"", (char *) NULL);
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return TCL_ERROR;
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}
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errfile = NULL;
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result = TCL_OK;
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Tcl_DStringInit(&errorBuffer);
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Tcl_DStringInit(&nameBuffer);
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for ( ; i < argc; i++) {
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struct stat statBuf;
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char *name;
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errfile = argv[i];
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Tcl_DStringSetLength(&nameBuffer, 0);
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name = Tcl_TranslateFileName(interp, argv[i], &nameBuffer);
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if (name == NULL) {
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result = TCL_ERROR;
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goto done;
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}
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/*
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* Call lstat() to get info so can delete symbolic link itself.
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*/
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if (lstat(name, &statBuf) != 0) {
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/*
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* Trying to delete a file that does not exist is not
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* considered an error, just a no-op
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*/
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if (errno != ENOENT) {
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result = TCL_ERROR;
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}
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} else if (S_ISDIR(statBuf.st_mode)) {
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result = TclpRemoveDirectory(name, force, &errorBuffer);
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if (result != TCL_OK) {
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if ((force == 0) && (errno == EEXIST)) {
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Tcl_AppendResult(interp, "error deleting \"", argv[i],
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"\": directory not empty", (char *) NULL);
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Tcl_PosixError(interp);
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goto done;
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}
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/*
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* If possible, use the untranslated name for the file.
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*/
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errfile = Tcl_DStringValue(&errorBuffer);
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if (strcmp(name, errfile) == 0) {
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errfile = argv[i];
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}
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}
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} else {
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result = TclpDeleteFile(name);
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}
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if (result == TCL_ERROR) {
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break;
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}
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}
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if (result != TCL_OK) {
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Tcl_AppendResult(interp, "error deleting \"", errfile,
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"\": ", Tcl_PosixError(interp), (char *) NULL);
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}
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done:
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Tcl_DStringFree(&errorBuffer);
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Tcl_DStringFree(&nameBuffer);
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return result;
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}
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/*
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*---------------------------------------------------------------------------
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*
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* CopyRenameOneFile
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*
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* Copies or renames specified source file or directory hierarchy
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* to the specified target.
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*
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* Results:
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* A standard Tcl result.
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*
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* Side effects:
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* Target is overwritten if the force flag is set. Attempting to
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* copy/rename a file onto a directory or a directory onto a file
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* will always result in an error.
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*
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*----------------------------------------------------------------------
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*/
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static int
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CopyRenameOneFile(interp, source, target, copyFlag, force)
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Tcl_Interp *interp; /* Used for error reporting. */
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char *source; /* Pathname of file to copy. May need to
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* be translated. */
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char *target; /* Pathname of file to create/overwrite.
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* May need to be translated. */
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int copyFlag; /* If non-zero, copy files. Otherwise,
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* rename them. */
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int force; /* If non-zero, overwrite target file if it
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* exists. Otherwise, error if target already
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* exists. */
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{
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int result;
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Tcl_DString sourcePath, targetPath, errorBuffer;
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char *targetName, *sourceName, *errfile;
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struct stat sourceStatBuf, targetStatBuf;
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sourceName = Tcl_TranslateFileName(interp, source, &sourcePath);
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if (sourceName == NULL) {
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return TCL_ERROR;
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}
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targetName = Tcl_TranslateFileName(interp, target, &targetPath);
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if (targetName == NULL) {
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Tcl_DStringFree(&sourcePath);
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return TCL_ERROR;
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}
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errfile = NULL;
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result = TCL_ERROR;
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Tcl_DStringInit(&errorBuffer);
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/*
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* We want to copy/rename links and not the files they point to, so we
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* use lstat(). If target is a link, we also want to replace the
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* link and not the file it points to, so we also use lstat() on the
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* target.
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*/
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if (lstat(sourceName, &sourceStatBuf) != 0) {
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errfile = source;
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goto done;
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}
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if (lstat(targetName, &targetStatBuf) != 0) {
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if (errno != ENOENT) {
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errfile = target;
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goto done;
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}
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} else {
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if (force == 0) {
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errno = EEXIST;
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errfile = target;
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goto done;
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}
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/*
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* Prevent copying or renaming a file onto itself. Under Windows,
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* stat always returns 0 for st_ino. However, the Windows-specific
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* code knows how to deal with copying or renaming a file on top of
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* itself. It might be a good idea to write a stat that worked.
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*/
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if ((sourceStatBuf.st_ino != 0) && (targetStatBuf.st_ino != 0)) {
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if ((sourceStatBuf.st_ino == targetStatBuf.st_ino) &&
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(sourceStatBuf.st_dev == targetStatBuf.st_dev)) {
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result = TCL_OK;
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goto done;
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}
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}
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/*
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* Prevent copying/renaming a file onto a directory and
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* vice-versa. This is a policy decision based on the fact that
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* existing implementations of copy and rename on all platforms
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* also prevent this.
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*/
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if (S_ISDIR(sourceStatBuf.st_mode)
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&& !S_ISDIR(targetStatBuf.st_mode)) {
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errno = EISDIR;
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Tcl_AppendResult(interp, "can't overwrite file \"", target,
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"\" with directory \"", source, "\"", (char *) NULL);
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goto done;
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}
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if (!S_ISDIR(sourceStatBuf.st_mode)
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&& S_ISDIR(targetStatBuf.st_mode)) {
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errno = EISDIR;
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Tcl_AppendResult(interp, "can't overwrite directory \"", target,
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"\" with file \"", source, "\"", (char *) NULL);
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goto done;
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}
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}
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if (copyFlag == 0) {
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result = TclpRenameFile(sourceName, targetName);
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if (result == TCL_OK) {
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goto done;
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}
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if (errno == EINVAL) {
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Tcl_AppendResult(interp, "error renaming \"", source, "\" to \"",
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target, "\": trying to rename a volume or ",
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"move a directory into itself", (char *) NULL);
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goto done;
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} else if (errno != EXDEV) {
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errfile = target;
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goto done;
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}
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/*
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* The rename failed because the move was across file systems.
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* Fall through to copy file and then remove original. Note that
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* the low-level TclpRenameFile is allowed to implement
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* cross-filesystem moves itself.
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*/
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}
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if (S_ISDIR(sourceStatBuf.st_mode)) {
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result = TclpCopyDirectory(sourceName, targetName, &errorBuffer);
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if (result != TCL_OK) {
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errfile = Tcl_DStringValue(&errorBuffer);
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if (strcmp(errfile, sourceName) == 0) {
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errfile = source;
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} else if (strcmp(errfile, targetName) == 0) {
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errfile = target;
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}
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}
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} else {
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result = TclpCopyFile(sourceName, targetName);
|
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if (result != TCL_OK) {
|
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/*
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* Well, there really shouldn't be a problem with source,
|
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* because up there we checked to see if it was ok to copy it.
|
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*/
|
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|
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errfile = target;
|
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}
|
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}
|
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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);
|
||
}
|