scoutos / prex-0.9.0 / usr / bin / touch / touch.c @ 03e9c04a
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/*
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* Copyright (c) 2005-2007, Kohsuke Ohtani
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/mount.h> |
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#include <sys/stat.h> |
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#include <sys/fcntl.h> |
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#include <unistd.h> |
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#include <err.h> |
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#include <errno.h> |
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#include <string.h> |
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#include <stdlib.h> |
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#include <limits.h> |
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#include <stdio.h> |
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#ifdef CMDBOX
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#define main(argc, argv) touch_main(argc, argv)
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#endif
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/* Flags */
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#define TF_NOCREAT 0x01 /* Do not create file */ |
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static void usage(void); |
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static int do_touch(char *, unsigned int); |
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int
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main(int argc, char *argv[]) |
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{ |
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unsigned int flags; |
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int ch;
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flags = 0;
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while ((ch = getopt(argc, argv, "")) != -1) |
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switch(ch) {
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case 'c': |
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flags |= TF_NOCREAT; |
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break;
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case '?': |
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default:
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usage(); |
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} |
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argc -= optind; |
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argv += optind; |
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if (argc == 0) |
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usage(); |
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do {
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if (do_touch(*argv, flags))
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err(1, NULL); |
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++argv; |
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} while (*argv);
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exit(1);
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} |
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static void |
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usage(void)
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{ |
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fprintf(stderr, "usage: touch [-c] file...\n");
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exit(1);
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} |
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static int |
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do_touch(char *file, unsigned int flags) |
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{ |
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struct stat st;
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int fd;
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if (stat(file, &st) < 0) { |
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if (!(flags & TF_NOCREAT)) {
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if ((fd = creat(file, 0666)) < 0) |
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return -1; |
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close(fd); |
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} |
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return 0; |
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} |
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if ((fd = open(file, 2)) < 0) |
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return -1; |
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/* utime(file, NULL) */
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close(fd); |
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return 0; |
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} |