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git/test-chmtime.c
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/* | |
* This program can either change modification time of the given | |
* file(s) or just print it. The program does not change atime or | |
* ctime (their values are explicitly preserved). | |
* | |
* The mtime can be changed to an absolute value: | |
* | |
* test-chmtime =<seconds> file... | |
* | |
* Relative to the current time as returned by time(3): | |
* | |
* test-chmtime =+<seconds> (or =-<seconds>) file... | |
* | |
* Or relative to the current mtime of the file: | |
* | |
* test-chmtime <seconds> file... | |
* test-chmtime +<seconds> (or -<seconds>) file... | |
* | |
* Examples: | |
* | |
* To just print the mtime use --verbose and set the file mtime offset to 0: | |
* | |
* test-chmtime -v +0 file | |
* | |
* To set the mtime to current time: | |
* | |
* test-chmtime =+0 file | |
* | |
*/ | |
#include "git-compat-util.h" | |
#include <utime.h> | |
static const char usage_str[] = "-v|--verbose (+|=|=+|=-|-)<seconds> <file>..."; | |
static int timespec_arg(const char *arg, long int *set_time, int *set_eq) | |
{ | |
char *test; | |
const char *timespec = arg; | |
*set_eq = (*timespec == '=') ? 1 : 0; | |
if (*set_eq) { | |
timespec++; | |
if (*timespec == '+') { | |
*set_eq = 2; /* relative "in the future" */ | |
timespec++; | |
} | |
} | |
*set_time = strtol(timespec, &test, 10); | |
if (*test) { | |
fprintf(stderr, "Not a base-10 integer: %s\n", arg + 1); | |
return 0; | |
} | |
if ((*set_eq && *set_time < 0) || *set_eq == 2) { | |
time_t now = time(NULL); | |
*set_time += now; | |
} | |
return 1; | |
} | |
int main(int argc, char *argv[]) | |
{ | |
static int verbose; | |
int i = 1; | |
/* no mtime change by default */ | |
int set_eq = 0; | |
long int set_time = 0; | |
if (argc < 3) | |
goto usage; | |
if (strcmp(argv[i], "--verbose") == 0 || strcmp(argv[i], "-v") == 0) { | |
verbose = 1; | |
++i; | |
} | |
if (timespec_arg(argv[i], &set_time, &set_eq)) | |
++i; | |
else | |
goto usage; | |
for (; i < argc; i++) { | |
struct stat sb; | |
struct utimbuf utb; | |
if (stat(argv[i], &sb) < 0) { | |
fprintf(stderr, "Failed to stat %s: %s\n", | |
argv[i], strerror(errno)); | |
return 1; | |
} | |
#ifdef GIT_WINDOWS_NATIVE | |
if (!(sb.st_mode & S_IWUSR) && | |
chmod(argv[i], sb.st_mode | S_IWUSR)) { | |
fprintf(stderr, "Could not make user-writable %s: %s", | |
argv[i], strerror(errno)); | |
return 1; | |
} | |
#endif | |
utb.actime = sb.st_atime; | |
utb.modtime = set_eq ? set_time : sb.st_mtime + set_time; | |
if (verbose) { | |
uintmax_t mtime = utb.modtime < 0 ? 0: utb.modtime; | |
printf("%"PRIuMAX"\t%s\n", mtime, argv[i]); | |
} | |
if (utb.modtime != sb.st_mtime && utime(argv[i], &utb) < 0) { | |
fprintf(stderr, "Failed to modify time on %s: %s\n", | |
argv[i], strerror(errno)); | |
return 1; | |
} | |
} | |
return 0; | |
usage: | |
fprintf(stderr, "usage: %s %s\n", argv[0], usage_str); | |
return 1; | |
} |