#define SLEEP_PHASE 300
static int nflag, vflag;
-static int timewait = 1;
+static int timewait = -1;
static int randdelay = 0;
static char *timefile;
return n;
}
+static long
+parse_dur(char *s)
+{
+ long n;
+ char *end;
+
+ errno = 0;
+ n = strtol(s, &end, 10);
+ if (errno) {
+ perror("strtol");
+ exit(1);
+ }
+ if (n < 0) {
+ fprintf(stderr, "negative duration\n");
+ exit(1);
+ }
+ switch (*end) {
+ case 'm': n *= 60; break;
+ case 'h': n *= 60*60; break;
+ case 'd': n *= 24*60*60; break;
+ case 0: break;
+ default:
+ fprintf(stderr, "junk after duration: %s\n", end);
+ exit(1);
+ }
+ return n;
+}
+
static int
parse(char *expr, char *buf, long bufsiz, int offset)
{
int main(int argc, char *argv[])
{
int c;
+ time_t t;
time_t now = time(0);
+ time_t last = 0;
/* default: every day at 00:00:00 */
memset(weekday, '*', sizeof weekday);
break;
case 'n': nflag++; break;
case 'v': vflag++; break;
- case 's': slack = atoi(optarg); break;
- case 'T': timewait = atoi(optarg); break;
+ case 's': slack = parse_dur(optarg); break;
+ case 'T': timewait = parse_dur(optarg); break;
case 't': timefile = optarg; break;
- case 'R': randdelay = atoi(optarg); break;
+ case 'R': randdelay = parse_dur(optarg); break;
default:
fprintf(stderr, "Usage: %s [-nv] [-t timefile] [-T timewait] [-R randdelay] [-s slack]\n"
" [-d mday] [-m mon] [-w wday] [-D yday] [-W yweek] [-H hour] [-M min] [-S sec] COMMAND...\n"
if (stat(timefile, &st) < 0) {
if (errno != ENOENT)
perror("stat");
+ t = start - slack - 1 - timewait;
+ } else {
+ t = st.st_mtime + 1;
+ }
+ if (timewait == -1) {
+ while (t < start - slack)
+ t = find_next(t + 1);
+ start = t;
} else {
- if (st.st_mtime + timewait > start)
+ if (t + timewait > start)
start = st.st_mtime + timewait;
}
}
start += delay;
}
- time_t t = find_next(start);
+ t = find_next(start);
if (t < 0) {
fprintf(stderr, "no satisfying date found within a year.\n");
exit(2);
/* dry-run, just output the next 5 dates. */
int i;
for (i = 0; i < 5; i++) {
- if (t > 0)
- printf("%s\n", isotime(localtime(&t)));
+ if (t > 0) {
+ char weekstr[4];
+ struct tm *tm = localtime(&t);
+ strftime(weekstr, sizeof weekstr, "%a", tm);
+ printf("%s %s %2ldd%3ldh%3ldm%3lds\n",
+ isotime(tm),
+ weekstr,
+ ((t - now) / (60*60*24)),
+ ((t - now) / (60*60)) % 24,
+ ((t - now) / 60) % 60,
+ (t - now) % 60);
+ }
t = find_next(t + 1);
}
exit(0);
while (!alarm_rang) {
now = time(0);
+ if (now < last) {
+ t = find_next(now);
+ if (vflag)
+ printf("Time moved backwards, rescheduled for %s\n", isotime(tm));
+ }
t = mktime(tm);
if (t <= now) {
if (now - t <= slack) // still about time
struct timespec ts;
ts.tv_nsec = 0;
ts.tv_sec = t - now > SLEEP_PHASE ? SLEEP_PHASE : t - now;
+ last = now;
nanosleep(&ts, 0);
// we just iterate again when this exits early
}
if (argc == optind)
return 0;
+ if (vflag) {
+ now = time(0);
+ tm = localtime(&now);
+ printf("Starting execution at %s\n", isotime(tm));
+ }
+
execvp(argv[optind], argv+optind);
perror("execvp");
return 255;