blob: e79092fc1cf9bf2c35dbec55b72f14b7ed0ebb1d [file] [log] [blame]
Erik Andersene49d5ec2000-02-08 19:58:47 +00001/* vi: set sw=4 ts=4: */
Eric Andersen596e5461999-10-07 08:30:23 +00002/*
3 * Mini touch implementation for busybox
4 *
Eric Andersenc7bda1c2004-03-15 08:29:22 +00005 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
Eric Andersen596e5461999-10-07 08:30:23 +00006 *
"Robert P. J. Day"801ab142006-07-12 07:56:04 +00007 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
Eric Andersen596e5461999-10-07 08:30:23 +00008 */
Eric Andersencc8ed391999-10-05 16:24:54 +00009
Manuel Novoa III cad53642003-03-19 09:13:01 +000010/* BB_AUDIT SUSv3 _NOT_ compliant -- options -a, -m, -r, -t not supported. */
11/* http://www.opengroup.org/onlinepubs/007904975/utilities/touch.html */
12
13/* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
14 *
15 * Previous version called open() and then utime(). While this will be
16 * be necessary to implement -r and -t, it currently only makes things bigger.
17 * Also, exiting on a failure was a bug. All args should be processed.
18 */
19
Denis Vlasenkob6adbf12007-05-26 19:00:18 +000020#include "libbb.h"
Eric Andersen596e5461999-10-07 08:30:23 +000021
Denis Vlasenko3f3aa2a2007-04-09 21:35:07 +000022/* This is a NOFORK applet. Be very careful! */
23
Denis Vlasenkoed90bda2008-06-28 01:18:09 +000024/* coreutils implements:
25 * -a change only the access time
26 * -c, --no-create
27 * do not create any files
28 * -d, --date=STRING
29 * parse STRING and use it instead of current time
30 * -f (ignored, BSD compat)
31 * -m change only the modification time
32 * -r, --reference=FILE
33 * use this file's times instead of current time
34 * -t STAMP
35 * use [[CC]YY]MMDDhhmm[.ss] instead of current time
36 * --time=WORD
37 * change the specified time: WORD is access, atime, or use
38 */
39
Denis Vlasenko9b49a5e2007-10-11 10:05:36 +000040int touch_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
Denis Vlasenkoa60f84e2008-07-05 09:18:54 +000041int touch_main(int argc UNUSED_PARAM, char **argv)
Eric Andersencc8ed391999-10-05 16:24:54 +000042{
Denis Vlasenkoed90bda2008-06-28 01:18:09 +000043#if ENABLE_DESKTOP
Denys Vlasenko7aca89a2009-07-18 03:41:29 +020044# if ENABLE_LONG_OPTS
45 static const char touch_longopts[] ALIGN1 =
Denis Vlasenko7241e6d2009-03-15 01:28:30 +000046 /* name, has_arg, val */
47 "no-create\0" No_argument "c"
48 "reference\0" Required_argument "r"
Denys Vlasenko7aca89a2009-07-18 03:41:29 +020049 "date\0" Required_argument "d"
Denis Vlasenko7241e6d2009-03-15 01:28:30 +000050 ;
Denys Vlasenko7aca89a2009-07-18 03:41:29 +020051# endif
Denis Vlasenkoed90bda2008-06-28 01:18:09 +000052 struct utimbuf timebuf;
53 char *reference_file = NULL;
Denys Vlasenko7aca89a2009-07-18 03:41:29 +020054 char *date_str = NULL;
Denis Vlasenkoed90bda2008-06-28 01:18:09 +000055#else
Denys Vlasenko7aca89a2009-07-18 03:41:29 +020056# define reference_file NULL
57# define date_str NULL
58# define timebuf (*(struct utimbuf*)NULL)
Denis Vlasenkoed90bda2008-06-28 01:18:09 +000059#endif
Erik Andersene49d5ec2000-02-08 19:58:47 +000060 int fd;
Manuel Novoa III cad53642003-03-19 09:13:01 +000061 int status = EXIT_SUCCESS;
Denis Vlasenko7241e6d2009-03-15 01:28:30 +000062 int opts;
63
Denys Vlasenko7aca89a2009-07-18 03:41:29 +020064#if ENABLE_DESKTOP && ENABLE_LONG_OPTS
65 applet_long_options = touch_longopts;
Denis Vlasenko7241e6d2009-03-15 01:28:30 +000066#endif
Denys Vlasenko38dd8aa2009-07-18 04:49:20 +020067 /* -d and -t both set time. In coreutils,
68 * accepted data format differs a bit between -d and -t.
69 * We accept the same formats for both */
70 opts = getopt32(argv, "c" IF_DESKTOP("r:d:t:")
Denis Vlasenkoed90bda2008-06-28 01:18:09 +000071 /*ignored:*/ "fma"
Denys Vlasenko7aca89a2009-07-18 03:41:29 +020072 IF_DESKTOP(, &reference_file)
73 IF_DESKTOP(, &date_str)
Denys Vlasenko38dd8aa2009-07-18 04:49:20 +020074 IF_DESKTOP(, &date_str)
Denys Vlasenko7aca89a2009-07-18 03:41:29 +020075 );
Manuel Novoa III cad53642003-03-19 09:13:01 +000076
Denis Vlasenko7241e6d2009-03-15 01:28:30 +000077 opts &= 1; /* only -c bit is left */
Manuel Novoa III cad53642003-03-19 09:13:01 +000078 argv += optind;
Manuel Novoa III cad53642003-03-19 09:13:01 +000079 if (!*argv) {
80 bb_show_usage();
Eric Andersen5a0a2aa2000-06-02 23:26:44 +000081 }
82
Denis Vlasenkoed90bda2008-06-28 01:18:09 +000083 if (reference_file) {
84 struct stat stbuf;
85 xstat(reference_file, &stbuf);
86 timebuf.actime = stbuf.st_atime;
87 timebuf.modtime = stbuf.st_mtime;
88 }
89
Denys Vlasenko7aca89a2009-07-18 03:41:29 +020090 if (date_str) {
91 struct tm tm_time;
92 time_t t;
93
94 //time(&t);
95 //localtime_r(&t, &tm_time);
96 memset(&tm_time, 0, sizeof(tm_time));
97 parse_datestr(date_str, &tm_time);
98
99 /* Correct any day of week and day of year etc. fields */
100 tm_time.tm_isdst = -1; /* Be sure to recheck dst */
101 t = validate_tm_time(date_str, &tm_time);
102
103 timebuf.actime = t;
104 timebuf.modtime = t;
105 }
106
Manuel Novoa III cad53642003-03-19 09:13:01 +0000107 do {
Denis Vlasenkoed90bda2008-06-28 01:18:09 +0000108 if (utime(*argv, reference_file ? &timebuf : NULL)) {
109 if (errno == ENOENT) { /* no such file */
Denis Vlasenko7241e6d2009-03-15 01:28:30 +0000110 if (opts) { /* creation is disabled, so ignore */
Manuel Novoa III cad53642003-03-19 09:13:01 +0000111 continue;
112 }
113 /* Try to create the file. */
114 fd = open(*argv, O_RDWR | O_CREAT,
115 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH
116 );
117 if ((fd >= 0) && !close(fd)) {
Denis Vlasenkoed90bda2008-06-28 01:18:09 +0000118 if (reference_file)
119 utime(*argv, &timebuf);
Manuel Novoa III cad53642003-03-19 09:13:01 +0000120 continue;
121 }
122 }
123 status = EXIT_FAILURE;
Denis Vlasenko0c97c9d2007-10-01 11:58:38 +0000124 bb_simple_perror_msg(*argv);
Eric Andersen5a0a2aa2000-06-02 23:26:44 +0000125 }
Manuel Novoa III cad53642003-03-19 09:13:01 +0000126 } while (*++argv);
Erik Andersene49d5ec2000-02-08 19:58:47 +0000127
Manuel Novoa III cad53642003-03-19 09:13:01 +0000128 return status;
Eric Andersencc8ed391999-10-05 16:24:54 +0000129}