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Diffstat (limited to 'test-chmtime.c')
-rw-r--r-- | test-chmtime.c | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/test-chmtime.c b/test-chmtime.c new file mode 100644 index 0000000000..fe476cb618 --- /dev/null +++ b/test-chmtime.c @@ -0,0 +1,119 @@ +/* + * 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[] = "-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, const 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 WIN32 + 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; +} |