Annotation of prex-old/usr/bin/touch/touch.c, Revision 1.1
1.1 ! nbrk 1: /*
! 2: * Copyright (c) 2005-2007, Kohsuke Ohtani
! 3: * All rights reserved.
! 4: *
! 5: * Redistribution and use in source and binary forms, with or without
! 6: * modification, are permitted provided that the following conditions
! 7: * are met:
! 8: * 1. Redistributions of source code must retain the above copyright
! 9: * notice, this list of conditions and the following disclaimer.
! 10: * 2. Redistributions in binary form must reproduce the above copyright
! 11: * notice, this list of conditions and the following disclaimer in the
! 12: * documentation and/or other materials provided with the distribution.
! 13: * 3. Neither the name of the author nor the names of any co-contributors
! 14: * may be used to endorse or promote products derived from this software
! 15: * without specific prior written permission.
! 16: *
! 17: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
! 18: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 19: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 20: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
! 21: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 22: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 23: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 24: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 25: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 26: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 27: * SUCH DAMAGE.
! 28: */
! 29:
! 30: #include <sys/mount.h>
! 31: #include <sys/stat.h>
! 32: #include <sys/fcntl.h>
! 33:
! 34: #include <unistd.h>
! 35: #include <err.h>
! 36: #include <errno.h>
! 37: #include <string.h>
! 38: #include <stdlib.h>
! 39: #include <limits.h>
! 40: #include <stdio.h>
! 41:
! 42: #ifdef CMDBOX
! 43: #define main(argc, argv) touch_main(argc, argv)
! 44: #endif
! 45:
! 46: /* Flags */
! 47: #define TF_NOCREAT 0x01 /* Do not create file */
! 48:
! 49: static void usage(void);
! 50: static int do_touch(char *, unsigned int);
! 51:
! 52: int
! 53: main(int argc, char *argv[])
! 54: {
! 55: unsigned int flags;
! 56: int ch;
! 57:
! 58: flags = 0;
! 59: while ((ch = getopt(argc, argv, "")) != -1)
! 60: switch(ch) {
! 61: case 'c':
! 62: flags |= TF_NOCREAT;
! 63: break;
! 64: case '?':
! 65: default:
! 66: usage();
! 67: }
! 68: argc -= optind;
! 69: argv += optind;
! 70:
! 71: if (argc == 0)
! 72: usage();
! 73:
! 74: do {
! 75: if (do_touch(*argv, flags))
! 76: err(1, NULL);
! 77: ++argv;
! 78: } while (*argv);
! 79: exit(1);
! 80: }
! 81:
! 82: static void
! 83: usage(void)
! 84: {
! 85: fprintf(stderr, "usage: touch [-c] file...\n");
! 86: exit(1);
! 87: }
! 88:
! 89: static int
! 90: do_touch(char *file, unsigned int flags)
! 91: {
! 92: struct stat st;
! 93: int fd;
! 94:
! 95: if (stat(file, &st) < 0) {
! 96: if (!(flags & TF_NOCREAT)) {
! 97: if ((fd = creat(file, 0666)) < 0)
! 98: return -1;
! 99: close(fd);
! 100: }
! 101: return 0;
! 102: }
! 103: if ((fd = open(file, 2)) < 0)
! 104: return -1;
! 105: /* utime(file, NULL) */
! 106: close(fd);
! 107: return 0;
! 108: }
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