/*
* Grab the specified timestamp and vary it, if necessary.
* The provided buffer must be at least EXIFTIMELEN bytes.
*/
static int
ettime(char *b, struct exifprop *p)
{
struct tm tv;
const struct vary *badv;
/* Slurp the timestamp into tv. */
if (!p || !p->str || etstrptm(p->str, &tv))
return (1);
/* Apply any adjustments. (Bad adjustment = fatal.) */
badv = vary_apply(v, &tv);
if (badv) {
exifwarn2("cannot apply adjustment", badv->arg);
usage();
}
if (strftime(b, EXIFTIMELEN, EXIFTIMEFMT, &tv) != EXIFTIMELEN - 1)
return (1);
return (0);
}
int
main(int argc, char *argv[])
{
struct timezone tz;
int ch, rflag;
int jflag, nflag;
const char *format;
char buf[1024];
char *endptr, *fmt;
char *tmp;
int set_timezone;
struct vary *v;
const struct vary *badv;
struct tm lt;
v = NULL;
fmt = NULL;
(void) setlocale(LC_TIME, "");
tz.tz_dsttime = tz.tz_minuteswest = 0;
rflag = 0;
jflag = nflag = 0;
set_timezone = 0;
while ((ch = getopt(argc, argv, "d:f:jnr:t:uv:")) != -1)
switch((char)ch) {
case 'd': /* daylight savings time */
tz.tz_dsttime = strtol(optarg, &endptr, 10) ? 1 : 0;
if (endptr == optarg || *endptr != '\0')
usage();
set_timezone = 1;
break;
case 'f':
fmt = optarg;
break;
case 'j':
jflag = 1; /* don't set time */
break;
case 'n': /* don't set network */
nflag = 1;
break;
case 'r': /* user specified seconds */
rflag = 1;
tval = strtoq(optarg, &tmp, 0);
if (*tmp != 0)
usage();
break;
case 't': /* minutes west of UTC */
/* error check; don't allow "PST" */
tz.tz_minuteswest = strtol(optarg, &endptr, 10);
if (endptr == optarg || *endptr != '\0')
usage();
set_timezone = 1;
break;
case 'u': /* do everything in UTC */
(void)setenv("TZ", "UTC0", 1);
break;
case 'v':
v = vary_append(v, optarg);
break;
default:
usage();
}
argc -= optind;
argv += optind;
/*
* If -d or -t, set the timezone or daylight savings time; this
* doesn't belong here; the kernel should not know about either.
*/
if (set_timezone && settimeofday((struct timeval *)NULL, &tz))
err(1, "settimeofday (timezone)");
if (!rflag && time(&tval) == -1)
err(1, "time");
format = "%+";
/* allow the operands in any order */
if (*argv && **argv == '+') {
format = *argv + 1;
++argv;
}
if (*argv) {
setthetime(fmt, *argv, jflag, nflag);
++argv;
} else if (fmt != NULL)
usage();
if (*argv && **argv == '+')
format = *argv + 1;
lt = *localtime(&tval);
badv = vary_apply(v, <);
if (badv) {
fprintf(stderr, "%s: Cannot apply date adjustment\n",
badv->arg);
vary_destroy(v);
usage();
}
vary_destroy(v);
(void)strftime(buf, sizeof(buf), format, <);
(void)printf("%s\n", buf);
if (fflush(stdout))
err(1, "stdout");
exit(retval);
}
