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https://github.com/pygos/init.git
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114 lines
2.2 KiB
C
114 lines
2.2 KiB
C
/* SPDX-License-Identifier: GPL-3.0-or-later */
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/*
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* Copyright (C) 2018 - David Oberhollenzer
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/socket.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <signal.h>
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#include <string.h>
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#include <errno.h>
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#include <stdio.h>
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#include "backend.h"
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#include "proto.h"
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#include "util.h"
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#define SYSLOG_SOCKET "/dev/log"
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static volatile sig_atomic_t syslog_run = 1;
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static volatile sig_atomic_t syslog_rotate = 0;
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static void sighandler(int signo)
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{
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switch (signo) {
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case SIGINT:
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case SIGTERM:
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syslog_run = 0;
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break;
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case SIGHUP:
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syslog_rotate = 1;
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break;
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default:
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break;
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}
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}
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static void signal_setup(void)
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{
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struct sigaction act;
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memset(&act, 0, sizeof(act));
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act.sa_handler = sighandler;
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sigaction(SIGINT, &act, NULL);
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sigaction(SIGTERM, &act, NULL);
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sigaction(SIGHUP, &act, NULL);
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}
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static int handle_data(int fd)
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{
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char buffer[2048];
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syslog_msg_t msg;
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ssize_t ret;
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memset(buffer, 0, sizeof(buffer));
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ret = read(fd, buffer, sizeof(buffer));
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if (ret <= 0)
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return -1;
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if (syslog_msg_parse(&msg, buffer))
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return -1;
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return logmgr->write(logmgr, &msg);
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}
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int main(void)
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{
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int sfd, status = EXIT_FAILURE;
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signal_setup();
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sfd = mksock(SYSLOG_SOCKET, SOCK_FLAG_EVERYONE | SOCK_FLAG_DGRAM);
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if (sfd < 0)
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return EXIT_FAILURE;
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if (logmgr->init(logmgr))
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goto out;
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while (syslog_run) {
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if (syslog_rotate) {
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logmgr->rotate(logmgr);
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syslog_rotate = 0;
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}
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handle_data(sfd);
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}
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status = EXIT_SUCCESS;
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out:
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logmgr->cleanup(logmgr);
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if (sfd > 0)
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close(sfd);
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unlink(SYSLOG_SOCKET);
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return status;
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}
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