mirror of
https://github.com/eddyem/ARMsingleboard.git
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107 lines
3.1 KiB
C
107 lines
3.1 KiB
C
/*
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* This file is part of the sslsosk project.
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* Copyright 2023 Edward V. Emelianov <edward.emelianoff@gmail.com>.
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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 <http://www.gnu.org/licenses/>.
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*/
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#include <signal.h>
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#include <stdio.h>
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#include <sys/prctl.h> // prctl
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#include <sys/wait.h> // wait
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#include <unistd.h>
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#include <usefull_macros.h>
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#include "cmdlnopts.h"
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#include "daemon.h"
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#include "sslsock.h"
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static pid_t childpid = -1;
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void signals(int sig){
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if(childpid == 0){
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LOGWARN("Child killed with sig=%d", sig);
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exit(sig); // slave process
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}
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// master process
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if(sig){
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signal(sig, SIG_IGN);
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LOGERR("Exit with signal %d", sig);
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}else LOGERR("Exit");
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if(G.pidfile) unlink(G.pidfile);
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exit(sig);
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}
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/**
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* @brief start_daemon - daemonize
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* @param self - self name of process
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* @return error code or 0
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*/
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int start_daemon(_U_ char *self){
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// check args
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int port = atoi(G.port);
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if(port < 1024 || port > 65535){
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LOGERR("Wrong port value: %d", port);
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return 1;
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}
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FILE *f = fopen(G.cert, "r");
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if(!f) ERR("Can't open certificate file %s", G.cert);
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fclose(f);
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f = fopen(G.key, "r");
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if(!f) ERR("Can't open certificate key file %s", G.key);
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fclose(f);
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#ifdef EBUG
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printf("cert: %s, key: %s\n", G.cert, G.key);
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#endif
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#ifdef CLIENT
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//DBG("server: %s", G.serverhost);
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if(!G.serverhost) ERRX("Point server name");
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#endif
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if(G.logfile){
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int lvl = LOGLEVEL_WARN + G.verbose;
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DBG("level = %d", lvl);
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if(lvl > LOGLEVEL_ANY) lvl = LOGLEVEL_ANY;
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green("Log file %s @ level %d\n", G.logfile, lvl);
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OPENLOG(G.logfile, lvl, 1);
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}
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signal(SIGTERM, signals); // kill (-15) - quit
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signal(SIGHUP, SIG_IGN); // hup - ignore
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signal(SIGINT, signals); // ctrl+C - quit
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signal(SIGQUIT, signals); // ctrl+\ - quit
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signal(SIGTSTP, SIG_IGN); // ignore ctrl+Z
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#ifdef SERVER
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check4running(self, G.pidfile);
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#endif
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LOGMSG("Started");
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#ifndef EBUG
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#ifdef CLIENT
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if(G.commands) return open_socket();
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#endif
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while(1){
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childpid = fork();
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if(childpid){ // master
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LOGMSG("Created child with pid %d", childpid);
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wait(NULL);
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LOGWARN("Child %d died", childpid);
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sleep(1); // wait a little before respawn
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}else{ // slave
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prctl(PR_SET_PDEATHSIG, SIGTERM); // send SIGTERM to child when parent dies
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break;
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}
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}
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#endif
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// parent should never reach this part of code
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return open_socket();
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}
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