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/* Copyright (C) 2023 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
This program 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.
This program 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 this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include <signal.h>
#include <stdio.h>
#include "utils/common/signal.h"
#include "contrib/color.h"
#include "knot/conf/base.h"
extern signal_ctx_t signal_ctx; // It must be defined as global in each utility.
int SIGNAL_REPEAT = 1;
static void signal_handler(int signum)
{
// Allow a repeated signal during the handler run (in case
// the handler gets stuck).
sigset_t set;
(void)sigaddset(&set, signum);
(void)sigprocmask(SIG_UNBLOCK, &set, NULL);
if (--SIGNAL_REPEAT < 0) {
abort();
}
(void)printf("%s%s\n", COL_RST(signal_ctx.color),
signum == SIGINT ? "" : strsignal(signum));
conf_t *config = conf();
if (config != NULL && config->api != NULL) {
config->api->deinit(config->db);
}
if (signal_ctx.close_db != NULL) {
knot_lmdb_close(signal_ctx.close_db);
}
exit(EXIT_FAILURE);
}
void signal_init_std(void)
{
struct sigaction sigact = { .sa_handler = signal_handler };
sigaction(SIGHUP, &sigact, NULL);
sigaction(SIGINT, &sigact, NULL);
sigaction(SIGPIPE, &sigact, NULL);
sigaction(SIGALRM, &sigact, NULL);
sigaction(SIGTERM, &sigact, NULL);
sigaction(SIGUSR1, &sigact, NULL);
sigaction(SIGUSR2, &sigact, NULL);
}
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