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0ea9ca0 @raalkml Add --verbose|-v to test-chmtime
raalkml authored
1 /*
2 * This program can either change modification time of the given
3 * file(s) or just print it. The program does not change atime nor
9517e6b @gitster Typofixes outside documentation area
gitster authored
4 * ctime (their values are explicitly preserved).
0ea9ca0 @raalkml Add --verbose|-v to test-chmtime
raalkml authored
5 *
6 * The mtime can be changed to an absolute value:
7 *
8 * test-chmtime =<seconds> file...
9 *
10 * Relative to the current time as returned by time(3):
11 *
12 * test-chmtime =+<seconds> (or =-<seconds>) file...
13 *
14 * Or relative to the current mtime of the file:
15 *
16 * test-chmtime <seconds> file...
17 * test-chmtime +<seconds> (or -<seconds>) file...
18 *
19 * Examples:
20 *
21 * To just print the mtime use --verbose and set the file mtime offset to 0:
22 *
23 * test-chmtime -v +0 file
24 *
25 * To set the mtime to current time:
26 *
27 * test-chmtime =+0 file
28 *
29 */
17e4836 Add test-chmtime: a utility to change mtime on files
Eric Wong authored
30 #include "git-compat-util.h"
31 #include <utime.h>
32
0ea9ca0 @raalkml Add --verbose|-v to test-chmtime
raalkml authored
33 static const char usage_str[] = "-v|--verbose (+|=|=+|=-|-)<seconds> <file>...";
17e4836 Add test-chmtime: a utility to change mtime on files
Eric Wong authored
34
0ea9ca0 @raalkml Add --verbose|-v to test-chmtime
raalkml authored
35 static int timespec_arg(const char *arg, long int *set_time, int *set_eq)
17e4836 Add test-chmtime: a utility to change mtime on files
Eric Wong authored
36 {
37 char *test;
0ea9ca0 @raalkml Add --verbose|-v to test-chmtime
raalkml authored
38 const char *timespec = arg;
39 *set_eq = (*timespec == '=') ? 1 : 0;
40 if (*set_eq) {
17e4836 Add test-chmtime: a utility to change mtime on files
Eric Wong authored
41 timespec++;
42 if (*timespec == '+') {
0ea9ca0 @raalkml Add --verbose|-v to test-chmtime
raalkml authored
43 *set_eq = 2; /* relative "in the future" */
17e4836 Add test-chmtime: a utility to change mtime on files
Eric Wong authored
44 timespec++;
45 }
46 }
0ea9ca0 @raalkml Add --verbose|-v to test-chmtime
raalkml authored
47 *set_time = strtol(timespec, &test, 10);
17e4836 Add test-chmtime: a utility to change mtime on files
Eric Wong authored
48 if (*test) {
0ea9ca0 @raalkml Add --verbose|-v to test-chmtime
raalkml authored
49 fprintf(stderr, "Not a base-10 integer: %s\n", arg + 1);
50 return 0;
17e4836 Add test-chmtime: a utility to change mtime on files
Eric Wong authored
51 }
0ea9ca0 @raalkml Add --verbose|-v to test-chmtime
raalkml authored
52 if ((*set_eq && *set_time < 0) || *set_eq == 2) {
17e4836 Add test-chmtime: a utility to change mtime on files
Eric Wong authored
53 time_t now = time(NULL);
0ea9ca0 @raalkml Add --verbose|-v to test-chmtime
raalkml authored
54 *set_time += now;
17e4836 Add test-chmtime: a utility to change mtime on files
Eric Wong authored
55 }
0ea9ca0 @raalkml Add --verbose|-v to test-chmtime
raalkml authored
56 return 1;
57 }
58
59 int main(int argc, const char *argv[])
60 {
61 static int verbose;
17e4836 Add test-chmtime: a utility to change mtime on files
Eric Wong authored
62
0ea9ca0 @raalkml Add --verbose|-v to test-chmtime
raalkml authored
63 int i = 1;
64 /* no mtime change by default */
65 int set_eq = 0;
66 long int set_time = 0;
67
68 if (argc < 3)
69 goto usage;
70
71 if (strcmp(argv[i], "--verbose") == 0 || strcmp(argv[i], "-v") == 0) {
72 verbose = 1;
73 ++i;
74 }
75 if (timespec_arg(argv[i], &set_time, &set_eq))
76 ++i;
77 else
78 goto usage;
79
80 for (; i < argc; i++) {
17e4836 Add test-chmtime: a utility to change mtime on files
Eric Wong authored
81 struct stat sb;
82 struct utimbuf utb;
83
84 if (stat(argv[i], &sb) < 0) {
85 fprintf(stderr, "Failed to stat %s: %s\n",
86 argv[i], strerror(errno));
87 return -1;
88 }
89
d9b2633 @dscho test-chmtime: work around Windows limitation
dscho authored
90 #ifdef WIN32
91 if (!(sb.st_mode & S_IWUSR) &&
92 chmod(argv[i], sb.st_mode | S_IWUSR)) {
93 fprintf(stderr, "Could not make user-writable %s: %s",
94 argv[i], strerror(errno));
95 return -1;
96 }
97 #endif
98
17e4836 Add test-chmtime: a utility to change mtime on files
Eric Wong authored
99 utb.actime = sb.st_atime;
100 utb.modtime = set_eq ? set_time : sb.st_mtime + set_time;
101
0ea9ca0 @raalkml Add --verbose|-v to test-chmtime
raalkml authored
102 if (verbose) {
103 uintmax_t mtime = utb.modtime < 0 ? 0: utb.modtime;
104 printf("%"PRIuMAX"\t%s\n", mtime, argv[i]);
105 }
106
107 if (utb.modtime != sb.st_mtime && utime(argv[i], &utb) < 0) {
17e4836 Add test-chmtime: a utility to change mtime on files
Eric Wong authored
108 fprintf(stderr, "Failed to modify time on %s: %s\n",
109 argv[i], strerror(errno));
110 return -1;
111 }
112 }
113
114 return 0;
115
116 usage:
117 fprintf(stderr, "Usage: %s %s\n", argv[0], usage_str);
118 return -1;
119 }
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