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/* wydawca - automatic release submission daemon
Copyright (C) 2007, 2009-2013, 2017, 2019-2022 Sergey Poznyakoff
Wydawca is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 3 of the License, or (at your
option) any later version.
Wydawca is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with wydawca. If not, see <http://www.gnu.org/licenses/>. */
#include "wydawca.h"
char *pidfile = LOCALSTATEDIR "/run/wydawca.pid";
int force_startup;
void
pidfile_remove(void)
{
unlink(pidfile);
}
void
pidfile_check(void)
{
FILE *fp = fopen(pidfile, "r+");
if (fp) {
unsigned long pid = -1;
if (fscanf(fp, "%lu\n", &pid) != 1) {
wy_log(LOG_ERR, _("malformed pidfile %s"), pidfile);
if (!force_startup)
exit(EX_UNAVAILABLE);
} else {
if (kill(pid, 0)) {
if (errno != ESRCH) {
wy_log(LOG_ERR,
_("cannot verify if PID %lu "
"is running: %s"), pid, strerror(errno));
if (!force_startup)
exit(EX_UNAVAILABLE);
}
} else if (!force_startup) {
wy_log(LOG_ERR,
_("another wydawca instance may "
"be running (PID %lu)"), pid);
exit(EX_UNAVAILABLE);
}
}
wy_log(LOG_NOTICE, _("replacing pidfile %s (PID %lu)"),
pidfile, pid);
fseek(fp, 0, SEEK_SET);
} else if (errno != ENOENT) {
wy_log(LOG_ERR, _("cannot open pidfile %s: %s"), pidfile,
strerror(errno));
exit(EX_UNAVAILABLE);
} else {
fp = fopen(pidfile, "w");
if (!fp) {
wy_log(LOG_ERR,
_("cannot open pidfile %s for writing: %s"),
pidfile, strerror(errno));
exit(EX_UNAVAILABLE);
}
}
fprintf(fp, "%lu\n", (unsigned long) getpid());
fclose(fp);
}
void
pidfile_update(void)
{
FILE *fp = fopen(pidfile, "w");
if (!fp) {
wy_log(LOG_ERR,
_("cannot open pidfile %s for writing: %s"),
pidfile, strerror(errno));
exit(EX_UNAVAILABLE);
}
fprintf(fp, "%lu\n", (unsigned long) getpid());
fclose(fp);
}
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