source: MondoRescue/trunk/mindi-busybox/coreutils/touch.c@ 954

/* vi: set sw=4 ts=4: */
/*
 * Mini touch implementation for busybox
 *
 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
 *
 * 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
 *
 */

/* BB_AUDIT SUSv3 _NOT_ compliant -- options -a, -m, -r, -t not supported. */
/* http://www.opengroup.org/onlinepubs/007904975/utilities/touch.html */

/* Mar 16, 2003      Manuel Novoa III   (mjn3@codepoet.org)
 *
 * Previous version called open() and then utime().  While this will be
 * be necessary to implement -r and -t, it currently only makes things bigger.
 * Also, exiting on a failure was a bug.  All args should be processed.
 */

#include <stdio.h>
#include <sys/types.h>
#include <fcntl.h>
#include <utime.h>
#include <errno.h>
#include <unistd.h>
#include <stdlib.h>
#include "busybox.h"

int touch_main(int argc, char **argv)
{
    int fd;
    int flags;
    int status = EXIT_SUCCESS;

    flags = bb_getopt_ulflags(argc, argv, "c");

    argv += optind;

    if (!*argv) {
        bb_show_usage();
    }

    do {
        if (utime(*argv, NULL)) {
            if (errno == ENOENT) {  /* no such file*/
                if (flags & 1) {    /* Creation is disabled, so ignore. */
                    continue;
                }
                /* Try to create the file. */
                fd = open(*argv, O_RDWR | O_CREAT,
                          S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH
                          );
                if ((fd >= 0) && !close(fd)) {
                    continue;
                }
            }
            status = EXIT_FAILURE;
            bb_perror_msg("%s", *argv);
        }
    } while (*++argv);

    return status;
}