Contents of /tags/mkinitrd-6_1_7/busybox/coreutils/touch.c
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Fri Oct 16 13:40:14 2009 UTC (14 years, 11 months ago) by niro
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Fri Oct 16 13:40:14 2009 UTC (14 years, 11 months ago) by niro
File MIME type: text/plain
File size: 2457 byte(s)
tagged 'mkinitrd-6_1_7'
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 | #if ENABLE_DESKTOP |
44 | struct utimbuf timebuf; |
45 | char *reference_file = NULL; |
46 | #else |
47 | #define reference_file NULL |
48 | #define timebuf (*(struct utimbuf*)NULL) |
49 | #endif |
50 | int fd; |
51 | int status = EXIT_SUCCESS; |
52 | int flags = getopt32(argv, "c" USE_DESKTOP("r:") |
53 | /*ignored:*/ "fma" |
54 | USE_DESKTOP(, &reference_file)); |
55 | |
56 | flags &= 1; /* only -c bit is left */ |
57 | argv += optind; |
58 | if (!*argv) { |
59 | bb_show_usage(); |
60 | } |
61 | |
62 | if (reference_file) { |
63 | struct stat stbuf; |
64 | xstat(reference_file, &stbuf); |
65 | timebuf.actime = stbuf.st_atime; |
66 | timebuf.modtime = stbuf.st_mtime; |
67 | } |
68 | |
69 | do { |
70 | if (utime(*argv, reference_file ? &timebuf : NULL)) { |
71 | if (errno == ENOENT) { /* no such file */ |
72 | if (flags) { /* creation is disabled, so ignore */ |
73 | continue; |
74 | } |
75 | /* Try to create the file. */ |
76 | fd = open(*argv, O_RDWR | O_CREAT, |
77 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH |
78 | ); |
79 | if ((fd >= 0) && !close(fd)) { |
80 | if (reference_file) |
81 | utime(*argv, &timebuf); |
82 | continue; |
83 | } |
84 | } |
85 | status = EXIT_FAILURE; |
86 | bb_simple_perror_msg(*argv); |
87 | } |
88 | } while (*++argv); |
89 | |
90 | return status; |
91 | } |