diff options
| -rw-r--r-- | test-chmtime.c | 91 |
1 files changed, 70 insertions, 21 deletions
diff --git a/test-chmtime.c b/test-chmtime.c index 90da448ebe..d5358cbaac 100644 --- a/test-chmtime.c +++ b/test-chmtime.c @@ -1,39 +1,83 @@ +/* + * This program can either change modification time of the given + * file(s) or just print it. The program does not change atime nor + * ctime (their values are explicitely 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[] = "(+|=|=+|=-|-)<seconds> <file>..."; +static const char usage_str[] = "-v|--verbose (+|=|=+|=-|-)<seconds> <file>..."; -int main(int argc, const char *argv[]) +static int timespec_arg(const char *arg, long int *set_time, int *set_eq) { - int i; - int set_eq; - long int set_time; char *test; - const char *timespec; - - if (argc < 3) - goto usage; - - timespec = argv[1]; - set_eq = (*timespec == '=') ? 1 : 0; - if (set_eq) { + const char *timespec = arg; + *set_eq = (*timespec == '=') ? 1 : 0; + if (*set_eq) { timespec++; if (*timespec == '+') { - set_eq = 2; /* relative "in the future" */ + *set_eq = 2; /* relative "in the future" */ timespec++; } } - set_time = strtol(timespec, &test, 10); + *set_time = strtol(timespec, &test, 10); if (*test) { - fprintf(stderr, "Not a base-10 integer: %s\n", argv[1] + 1); - goto usage; + fprintf(stderr, "Not a base-10 integer: %s\n", arg + 1); + return 0; } - if ((set_eq && set_time < 0) || set_eq == 2) { + if ((*set_eq && *set_time < 0) || *set_eq == 2) { time_t now = time(NULL); - set_time += now; + *set_time += now; } + return 1; +} + +int main(int argc, const char *argv[]) +{ + static int verbose; - for (i = 2; i < argc; i++) { + 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; @@ -46,7 +90,12 @@ int main(int argc, const char *argv[]) utb.actime = sb.st_atime; utb.modtime = set_eq ? set_time : sb.st_mtime + set_time; - if (utime(argv[i], &utb) < 0) { + 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; |