diff options
| -rw-r--r-- | README.md | 5 | ||||
| -rw-r--r-- | snooze.1 | 9 | ||||
| -rw-r--r-- | snooze.c | 34 |
3 files changed, 31 insertions, 17 deletions
@@ -71,10 +71,11 @@ Over systemd timers: * `-n`: dry-run, print the next 5 times the command would run. * `-v`: verbose, print scheduled (and rescheduled) times. * `-t`, `-T`: see below timefiles -* `-R`: add between 0 and RANDDELAY seconds to the scheduled time. +* `-R`: add between 0 and RANDDELAY seconds to the start of the scheduled time. +* `-J`: add between 0 and JITTER seconds to scheduled execution time. * `-s`: commands are executed even if they are SLACK (default: 60) seconds late. -The durations RANDDELAY and SLACK and TIMEWAIT are parsed as seconds, +The durations RANDDELAY and JITTER and SLACK and TIMEWAIT are parsed as seconds, unless a postfix of `m` for minutes, `h` for hours, or `d` for days is used. The remaining arguments are patterns for the time fields: @@ -10,6 +10,7 @@ .Op Fl t Ar timefile .Op Fl T Ar timewait .Op Fl R Ar randdelay +.Op Fl J Ar jitter .Op Fl s Ar slack .Op Fl d Ar day .Op Fl m Ar mon @@ -38,9 +39,13 @@ Verbose: print scheduled (and rescheduled) times. See below, .Sx TIMEFILES . .It Fl R -Wait randomly up to +Delay determination of scheduled time randomly up to .Ar randdelay -seconds later than the scheduled time. +seconds later. +.It Fl J +Delay execution randomly up to +.Ar jitter +seconds later than scheduled time. .It Fl s Commands are executed even if they are .Ar slack @@ -28,6 +28,7 @@ static int nflag, vflag; static int timewait = -1; static int randdelay = 0; +static int jitter = 0; static char *timefile; static sig_atomic_t alarm_rang = 0; @@ -215,6 +216,14 @@ next_day: goto next_day; } + if (jitter && !nflag) { + long delay; + delay = lrand48() % jitter; + if (vflag) + printf("adding %lds for jitter.\n", delay); + t += delay; + } + return t; } @@ -246,7 +255,7 @@ main(int argc, char *argv[]) setvbuf(stdout, 0, _IOLBF, 0); - while ((c = getopt(argc, argv, "+D:W:H:M:S:T:R:d:m:ns:t:vw:")) != -1) + while ((c = getopt(argc, argv, "+D:W:H:M:S:T:R:J:d:m:ns:t:vw:")) != -1) switch (c) { case 'D': parse(optarg, dayofyear, sizeof dayofyear, -1); break; case 'W': parse(optarg, weekofyear, sizeof weekofyear, -1); break; @@ -266,8 +275,9 @@ main(int argc, char *argv[]) case 'T': timewait = parse_dur(optarg); break; case 't': timefile = optarg; break; case 'R': randdelay = parse_dur(optarg); break; + case 'J': jitter = parse_dur(optarg); break; default: - fprintf(stderr, "Usage: %s [-nv] [-t timefile] [-T timewait] [-R randdelay] [-s slack]\n" + fprintf(stderr, "Usage: %s [-nv] [-t timefile] [-T timewait] [-R randdelay] [-J jitter] [-s slack]\n" " [-d mday] [-m mon] [-w wday] [-D yday] [-W yweek] [-H hour] [-M min] [-S sec] COMMAND...\n" "Timespec: exact: 1,3,5\n" " range: 1-7\n" @@ -296,18 +306,11 @@ main(int argc, char *argv[]) } } + srand48(getpid() ^ start); + if (randdelay) { long delay; -#ifdef __linux__ - long rnd = getauxval(AT_RANDOM); - if (rnd > 0) - delay = rnd % randdelay; - else -#endif - { - srand48(getpid() ^ start); - delay = lrand48() % randdelay; - } + delay = lrand48() % randdelay; if (vflag) printf("randomly delaying by %lds.\n", delay); start += delay; @@ -326,13 +329,18 @@ main(int argc, char *argv[]) char weekstr[4]; struct tm *tm = localtime(&t); strftime(weekstr, sizeof weekstr, "%a", tm); - printf("%s %s %2ldd%3ldh%3ldm%3lds\n", + printf("%s %s %2ldd%3ldh%3ldm%3lds ", isotime(tm), weekstr, ((t - now) / (60*60*24)), ((t - now) / (60*60)) % 24, ((t - now) / 60) % 60, (t - now) % 60); + if(jitter) { + printf("(plus up to %ds for jitter)\n", jitter); + } else { + printf("\n"); + } t = find_next(t + 1); if (t < 0) { fprintf(stderr, |