Contents of /tags/mkinitrd-6_5_2/busybox/coreutils/touch.c
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Wed Sep 7 18:40:16 2011 UTC (13 years ago) by niro
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Wed Sep 7 18:40:16 2011 UTC (13 years ago) by niro
File MIME type: text/plain
File size: 3427 byte(s)
tagged 'mkinitrd-6_5_2'
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 tarball for details. |
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 | } |