1 | /* vi: set sw=4 ts=4: */
|
---|
2 | /*
|
---|
3 | * Mini touch implementation for busybox
|
---|
4 | *
|
---|
5 | * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
|
---|
6 | *
|
---|
7 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
|
---|
8 | */
|
---|
9 |
|
---|
10 | /* 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 |
|
---|
20 | #include "libbb.h"
|
---|
21 |
|
---|
22 | /* This is a NOFORK applet. Be very careful! */
|
---|
23 |
|
---|
24 | /* 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 |
|
---|
40 | int touch_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
---|
41 | int touch_main(int argc UNUSED_PARAM, char **argv)
|
---|
42 | {
|
---|
43 | int fd;
|
---|
44 | int status = EXIT_SUCCESS;
|
---|
45 | int opts;
|
---|
46 | #if ENABLE_DESKTOP
|
---|
47 | # if ENABLE_LONG_OPTS
|
---|
48 | static const char touch_longopts[] ALIGN1 =
|
---|
49 | /* name, has_arg, val */
|
---|
50 | "no-create\0" No_argument "c"
|
---|
51 | "reference\0" Required_argument "r"
|
---|
52 | "date\0" Required_argument "d"
|
---|
53 | ;
|
---|
54 | # endif
|
---|
55 | char *reference_file = NULL;
|
---|
56 | char *date_str = NULL;
|
---|
57 | struct timeval timebuf[2];
|
---|
58 | timebuf[1].tv_usec = timebuf[0].tv_usec = 0;
|
---|
59 | #else
|
---|
60 | # define reference_file NULL
|
---|
61 | # define date_str NULL
|
---|
62 | # define timebuf ((struct timeval*)NULL)
|
---|
63 | #endif
|
---|
64 |
|
---|
65 | #if ENABLE_DESKTOP && ENABLE_LONG_OPTS
|
---|
66 | applet_long_options = touch_longopts;
|
---|
67 | #endif
|
---|
68 | /* -d and -t both set time. In coreutils,
|
---|
69 | * accepted data format differs a bit between -d and -t.
|
---|
70 | * We accept the same formats for both */
|
---|
71 | opts = getopt32(argv, "c" IF_DESKTOP("r:d:t:")
|
---|
72 | /*ignored:*/ "fma"
|
---|
73 | IF_DESKTOP(, &reference_file)
|
---|
74 | IF_DESKTOP(, &date_str)
|
---|
75 | IF_DESKTOP(, &date_str)
|
---|
76 | );
|
---|
77 |
|
---|
78 | opts &= 1; /* only -c bit is left */
|
---|
79 | argv += optind;
|
---|
80 | if (!*argv) {
|
---|
81 | bb_show_usage();
|
---|
82 | }
|
---|
83 |
|
---|
84 | if (reference_file) {
|
---|
85 | struct stat stbuf;
|
---|
86 | xstat(reference_file, &stbuf);
|
---|
87 | timebuf[1].tv_sec = timebuf[0].tv_sec = stbuf.st_mtime;
|
---|
88 | }
|
---|
89 |
|
---|
90 | 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[1].tv_sec = timebuf[0].tv_sec = t;
|
---|
104 | }
|
---|
105 |
|
---|
106 | do {
|
---|
107 | if (utimes(*argv, (reference_file || date_str) ? timebuf : NULL) != 0) {
|
---|
108 | if (errno == ENOENT) { /* no such file */
|
---|
109 | if (opts) { /* creation is disabled, so ignore */
|
---|
110 | continue;
|
---|
111 | }
|
---|
112 | /* Try to create the file */
|
---|
113 | fd = open(*argv, O_RDWR | O_CREAT, 0666);
|
---|
114 | if (fd >= 0) {
|
---|
115 | xclose(fd);
|
---|
116 | if (reference_file || date_str)
|
---|
117 | utimes(*argv, timebuf);
|
---|
118 | continue;
|
---|
119 | }
|
---|
120 | }
|
---|
121 | status = EXIT_FAILURE;
|
---|
122 | bb_simple_perror_msg(*argv);
|
---|
123 | }
|
---|
124 | } while (*++argv);
|
---|
125 |
|
---|
126 | return status;
|
---|
127 | }
|
---|