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0ea9ca07aa
This allows us replace perl when getting the mtime of a file because
of time zone conversions, though at the moment only one platform which
does this has been identified: Cygwin when used with ActiveState Perl
(as usual).
The output format is:
<mtime1> TAB <filename1> <LF>
<mtime2> TAB <filename2> <LF>
...
which, if only mtime is needed can be parsed with cut(1):
test-chmtime -v +0 filename1 | cut -f 1
Also, the change adds a description of programs features, with examples.
Signed-off-by: Alex Riesen <ariesen@harmanbecker.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
110 lines
2.4 KiB
C
110 lines
2.4 KiB
C
/*
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* This program can either change modification time of the given
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* file(s) or just print it. The program does not change atime nor
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* ctime (their values are explicitely preserved).
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*
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* The mtime can be changed to an absolute value:
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*
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* test-chmtime =<seconds> file...
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*
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* Relative to the current time as returned by time(3):
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*
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* test-chmtime =+<seconds> (or =-<seconds>) file...
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*
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* Or relative to the current mtime of the file:
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*
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* test-chmtime <seconds> file...
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* test-chmtime +<seconds> (or -<seconds>) file...
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*
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* Examples:
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*
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* To just print the mtime use --verbose and set the file mtime offset to 0:
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*
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* test-chmtime -v +0 file
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*
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* To set the mtime to current time:
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*
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* test-chmtime =+0 file
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*
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*/
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#include "git-compat-util.h"
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#include <utime.h>
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static const char usage_str[] = "-v|--verbose (+|=|=+|=-|-)<seconds> <file>...";
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static int timespec_arg(const char *arg, long int *set_time, int *set_eq)
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{
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char *test;
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const char *timespec = arg;
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*set_eq = (*timespec == '=') ? 1 : 0;
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if (*set_eq) {
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timespec++;
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if (*timespec == '+') {
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*set_eq = 2; /* relative "in the future" */
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timespec++;
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}
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}
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*set_time = strtol(timespec, &test, 10);
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if (*test) {
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fprintf(stderr, "Not a base-10 integer: %s\n", arg + 1);
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return 0;
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}
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if ((*set_eq && *set_time < 0) || *set_eq == 2) {
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time_t now = time(NULL);
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*set_time += now;
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}
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return 1;
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}
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int main(int argc, const char *argv[])
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{
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static int verbose;
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int i = 1;
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/* no mtime change by default */
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int set_eq = 0;
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long int set_time = 0;
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if (argc < 3)
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goto usage;
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if (strcmp(argv[i], "--verbose") == 0 || strcmp(argv[i], "-v") == 0) {
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verbose = 1;
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++i;
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}
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if (timespec_arg(argv[i], &set_time, &set_eq))
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++i;
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else
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goto usage;
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for (; i < argc; i++) {
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struct stat sb;
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struct utimbuf utb;
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if (stat(argv[i], &sb) < 0) {
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fprintf(stderr, "Failed to stat %s: %s\n",
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argv[i], strerror(errno));
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return -1;
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}
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utb.actime = sb.st_atime;
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utb.modtime = set_eq ? set_time : sb.st_mtime + set_time;
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if (verbose) {
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uintmax_t mtime = utb.modtime < 0 ? 0: utb.modtime;
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printf("%"PRIuMAX"\t%s\n", mtime, argv[i]);
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}
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if (utb.modtime != sb.st_mtime && utime(argv[i], &utb) < 0) {
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fprintf(stderr, "Failed to modify time on %s: %s\n",
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argv[i], strerror(errno));
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return -1;
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}
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}
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return 0;
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usage:
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fprintf(stderr, "Usage: %s %s\n", argv[0], usage_str);
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return -1;
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}
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