1 | /* vi: set sw=4 ts=4: */
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2 | /*
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3 | * Mini touch implementation for busybox
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4 | *
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5 | * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
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6 | *
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7 | * This program is free software; you can redistribute it and/or modify
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8 | * it under the terms of the GNU General Public License as published by
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9 | * the Free Software Foundation; either version 2 of the License, or
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10 | * (at your option) any later version.
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11 | *
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12 | * This program is distributed in the hope that it will be useful,
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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15 | * General Public License for more details.
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16 | *
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17 | * You should have received a copy of the GNU General Public License
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18 | * along with this program; if not, write to the Free Software
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19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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20 | *
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21 | */
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22 |
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23 | /* BB_AUDIT SUSv3 _NOT_ compliant -- options -a, -m, -r, -t not supported. */
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24 | /* http://www.opengroup.org/onlinepubs/007904975/utilities/touch.html */
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25 |
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26 | /* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
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27 | *
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28 | * Previous version called open() and then utime(). While this will be
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29 | * be necessary to implement -r and -t, it currently only makes things bigger.
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30 | * Also, exiting on a failure was a bug. All args should be processed.
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31 | */
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32 |
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33 | #include <stdio.h>
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34 | #include <sys/types.h>
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35 | #include <fcntl.h>
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36 | #include <utime.h>
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37 | #include <errno.h>
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38 | #include <unistd.h>
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39 | #include <stdlib.h>
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40 | #include "busybox.h"
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41 |
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42 | int touch_main(int argc, char **argv)
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43 | {
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44 | int fd;
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45 | int flags;
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46 | int status = EXIT_SUCCESS;
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47 |
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48 | flags = bb_getopt_ulflags(argc, argv, "c");
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49 |
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50 | argv += optind;
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51 |
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52 | if (!*argv) {
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53 | bb_show_usage();
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54 | }
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55 |
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56 | do {
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57 | if (utime(*argv, NULL)) {
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58 | if (errno == ENOENT) { /* no such file*/
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59 | if (flags & 1) { /* Creation is disabled, so ignore. */
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60 | continue;
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61 | }
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62 | /* Try to create the file. */
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63 | fd = open(*argv, O_RDWR | O_CREAT,
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64 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH
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65 | );
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66 | if ((fd >= 0) && !close(fd)) {
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67 | continue;
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68 | }
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69 | }
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70 | status = EXIT_FAILURE;
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71 | bb_perror_msg("%s", *argv);
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72 | }
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73 | } while (*++argv);
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74 |
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75 | return status;
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76 | }
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