busybox/coreutils/touch.c

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/* vi: set sw=4 ts=4: */
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/*
* Mini touch implementation for busybox
*
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*
* Copyright (C) 1999,2000 by Lineo, inc.
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* Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
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*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
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#include "internal.h"
#include <stdio.h>
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#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
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#include <utime.h>
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#include <errno.h>
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static const char touch_usage[] = "touch [-c] file [file ...]\n\n"
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"Update the last-modified date on the given file[s].\n";
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extern int touch_main(int argc, char **argv)
{
int fd;
int create = TRUE;
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if (argc < 2) {
usage(touch_usage);
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}
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argc--;
argv++;
/* Parse options */
while (**argv == '-') {
while (*++(*argv))
switch (**argv) {
case 'c':
create = FALSE;
break;
default:
usage(touch_usage);
exit(FALSE);
}
argc--;
argv++;
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}
fd = open(*argv, (create == FALSE) ? O_RDWR : O_RDWR | O_CREAT, 0644);
if (fd < 0) {
if (create == FALSE && errno == ENOENT)
exit(TRUE);
else {
perror("touch");
exit(FALSE);
}
}
close(fd);
if (utime(*argv, NULL)) {
perror("touch");
exit(FALSE);
} else
exit(TRUE);
}