mirror of https://github.com/pygos/cron
129 lines
2.1 KiB
C
129 lines
2.1 KiB
C
/* SPDX-License-Identifier: ISC */
|
|
#include "gcrond.h"
|
|
|
|
static crontab_t *jobs;
|
|
static sig_atomic_t run = 1;
|
|
static sig_atomic_t rescan = 1;
|
|
|
|
static void read_config(void)
|
|
{
|
|
if (cronscan(GCRONDIR, &jobs)) {
|
|
fputs("Error reading configuration. Continuing anyway.\n",
|
|
stderr);
|
|
}
|
|
}
|
|
|
|
static void cleanup_config(void)
|
|
{
|
|
crontab_t *t;
|
|
|
|
while (jobs != NULL) {
|
|
t = jobs;
|
|
jobs = jobs->next;
|
|
delcron(t);
|
|
}
|
|
}
|
|
|
|
static int timeout_minutes(int minutes)
|
|
{
|
|
time_t now = time(NULL);
|
|
struct tm t;
|
|
|
|
localtime_r(&now, &t);
|
|
return minutes * 60 + 30 - t.tm_sec;
|
|
}
|
|
|
|
static int calc_timeout(void)
|
|
{
|
|
time_t now = time(NULL), future;
|
|
struct tm tmstruct;
|
|
crontab_t mask, *t;
|
|
int minutes;
|
|
|
|
for (minutes = 0; minutes < 120; ++minutes) {
|
|
future = now + minutes * 60;
|
|
|
|
localtime_r(&future, &tmstruct);
|
|
cron_tm_to_mask(&mask, &tmstruct);
|
|
|
|
for (t = jobs; t != NULL; t = t->next) {
|
|
if (cron_should_run(t, &mask))
|
|
goto out;
|
|
}
|
|
}
|
|
out:
|
|
return timeout_minutes(minutes ? minutes : 1);
|
|
}
|
|
|
|
static void runjobs(void)
|
|
{
|
|
time_t now = time(NULL);
|
|
struct tm tmstruct;
|
|
crontab_t mask, *t;
|
|
|
|
localtime_r(&now, &tmstruct);
|
|
cron_tm_to_mask(&mask, &tmstruct);
|
|
|
|
for (t = jobs; t != NULL; t = t->next) {
|
|
if (cron_should_run(t, &mask))
|
|
runjob(t);
|
|
}
|
|
}
|
|
|
|
static void sighandler(int signo)
|
|
{
|
|
pid_t pid;
|
|
|
|
switch (signo) {
|
|
case SIGINT:
|
|
case SIGTERM:
|
|
run = 0;
|
|
break;
|
|
case SIGHUP:
|
|
rescan = 1;
|
|
break;
|
|
case SIGCHLD:
|
|
while ((pid = waitpid(-1, NULL, WNOHANG)) != -1)
|
|
;
|
|
break;
|
|
}
|
|
}
|
|
|
|
int main(void)
|
|
{
|
|
struct timespec stime;
|
|
struct sigaction act;
|
|
int timeout;
|
|
|
|
memset(&act, 0, sizeof(act));
|
|
act.sa_handler = sighandler;
|
|
sigaction(SIGINT, &act, NULL);
|
|
sigaction(SIGTERM, &act, NULL);
|
|
sigaction(SIGHUP, &act, NULL);
|
|
sigaction(SIGCHLD, &act, NULL);
|
|
|
|
while (run) {
|
|
if (rescan == 1) {
|
|
cleanup_config();
|
|
read_config();
|
|
timeout = timeout_minutes(1);
|
|
rescan = 0;
|
|
} else {
|
|
runjobs();
|
|
timeout = calc_timeout();
|
|
}
|
|
|
|
stime.tv_sec = timeout;
|
|
stime.tv_nsec = 0;
|
|
|
|
while (nanosleep(&stime, &stime) != 0 && run && !rescan) {
|
|
if (errno != EINTR) {
|
|
perror("nanosleep");
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
return EXIT_SUCCESS;
|
|
}
|