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- /*
- * Copyright (c) 1988 Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
- #ifndef lint
- char copyright[] =
- "@(#) Copyright (c) 1988 Regents of the University of California.\n\
- All rights reserved.\n";
- #endif /* not lint */
-
- #ifndef lint
- static char sccsid[] = "@(#)touch.c 4.8 (Berkeley) 6/1/90";
- #endif /* not lint */
-
- /*
- * Attempt to set the modify date of a file to the current date. If the
- * file exists, read and write its first character. If the file doesn't
- * exist, create it, unless -c option prevents it. If the file is read-only,
- * -f forces chmod'ing and touch'ing.
- */
- #include <sys/types.h>
- #ifdef _POSIX_SOURCE
- #include <stdlib.h>
- #include <fcntl.h>
- #include <unistd.h>
- #else
- #include <sys/file.h>
- #endif
- #include <sys/stat.h>
- #include <stdio.h>
- #if WIN_NT
- #include <sys/cdefs.h>
- #include <misc.h>
- #include <bsdlib.h>
-
- extern int globulate __P((int, int, char **));
- extern void deglobulate __P((void));
- extern int globulated_argc;
- extern char **globulated_argv;
- pid_t ppid;
- int globulation;
- #endif
-
- static int dontcreate; /* set if -c option */
- static int force; /* set if -f option */
-
- int touch __P((char *));
- int readwrite __P((char *, off_t));
- void usage __P((void));
-
- int
- #if __STDC__
- main (int argc, char **argv)
- #else
- main(argc, argv)
- int argc;
- char **argv;
- #endif
- {
- extern int optind;
- int ch, retval;
-
-
- #if WIN_NT
- ppid = getppid();
- if (ppid == (pid_t) 1) /* if parent is CMD.EXE */
- {
- globulation = globulate(1, argc, argv);
- if (globulation == 0)
- {
- argc = globulated_argc;
- argv = globulated_argv;
- }
- }
- #endif
- dontcreate = force = retval = 0;
- while ((ch = getopt(argc, argv, "cf")) != EOF)
- switch((char)ch) {
- case 'c':
- dontcreate = 1;
- break;
- case 'f':
- force = 1;
- break;
- case '?':
- default:
- usage();
- }
- if (!*(argv += optind))
- usage();
- do {
- retval |= touch(*argv);
- } while (*++argv);
- #if WIN_NT
- if (ppid == (pid_t) 1 && globulation == 0)
- deglobulate();
- #endif
- return retval;
- }
-
- int
- #if __STDC__
- touch (char *filename)
- #else
- touch(filename)
- char *filename;
- #endif
- {
- struct stat statbuffer;
-
- if (stat(filename, &statbuffer) == -1) {
- if (!dontcreate)
- return(readwrite(filename, 0L));
- /*
- Marked off for option 'c' to work according
- to BSD man pages
- */
- #if 0
- fprintf(stderr, "touch: %s: does not exist\n", filename);
- #endif
- return(EXIT_FAILURE);
- }
- if ((statbuffer.st_mode & S_IFMT) != S_IFREG) {
- fprintf(stderr, "touch: %s: can only touch regular files\n",
- filename);
- return(EXIT_FAILURE);
- }
- if (!access(filename, R_OK | W_OK)) {
- return(readwrite(filename,statbuffer.st_size));
- }
-
- if (force) {
- int retval;
-
- if (chmod(filename, S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)) {
- fprintf(stderr, "touch: %s: couldn't chmod: ",
- filename);
- perror((char *)NULL);
- return(EXIT_FAILURE);
- }
- retval = readwrite(filename, statbuffer.st_size);
- if (chmod(filename, statbuffer.st_mode)) {
- fprintf(stderr, "touch: %s: couldn't chmod back: ",
- filename);
- perror((char *)NULL);
- return(EXIT_FAILURE);
- }
- return(retval);
- }
- fprintf(stderr, "touch: %s: cannot touch\n", filename);
- return(EXIT_FAILURE);
- }
-
- int
- #if __STDC__
- readwrite (char *filename, off_t size)
- #else
- readwrite(filename, size)
- char *filename;
- off_t size;
- #endif
- {
- int filedescriptor;
- char first;
- #if !_POSIX_SOURCE
- off_t lseek();
- #endif
-
- if (size) {
- filedescriptor = open(filename, O_RDWR, 0);
- if (filedescriptor == -1) {
- error: fprintf(stderr, "touch: %s: ", filename);
- perror((char *)NULL);
- return(EXIT_FAILURE);
- }
- if (read(filedescriptor, &first, 1) != 1)
- goto error;
- #ifdef _POSIX_SOURCE
- if (lseek(filedescriptor, (off_t) 0, SEEK_SET) == (off_t) -1)
- #else
- if (lseek(filedescriptor, 0L, 0) == -1)
- #endif
- goto error;
- if (write(filedescriptor, &first, 1) != 1)
- goto error;
- } else {
- filedescriptor = creat(filename, 0666);
- if (filedescriptor == -1)
- goto error;
- }
- if (close(filedescriptor) == -1)
- goto error;
- return(EXIT_SUCCESS);
- }
-
- void
- #if __STDC__
- usage (void)
- #else
- usage()
- #endif
- {
- fprintf(stderr, "usage: touch [-cf] file ...\n");
- #if WIN_NT
- if (ppid == (pid_t) 1 && globulation == 0)
- deglobulate();
- #endif
- exit(EXIT_FAILURE);
- }
-