mirror of
https://github.com/eddyem/small_tel.git
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119 lines
3.8 KiB
C
119 lines
3.8 KiB
C
/*
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* This file is part of the Snippets project.
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* Copyright 2024 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 <fcntl.h>
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#include <signal.h>
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#include <stdio.h>
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#include <string.h>
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#include <sys/wait.h> // wait
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#include <sys/prctl.h> //prctl
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#include <usefull_macros.h>
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#include "args.h"
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#include "server.h"
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#include "mount.h"
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static pid_t childpid = -1; // PID of child process
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static const char *pidfile = NULL;
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void signals(int sig){
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if(childpid){ // single or parent process
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if(pidfile) unlink(pidfile); // remove pidfile
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if(childpid > 0) kill(childpid, SIGTERM);
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}
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if(sig){
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signal(sig, SIG_IGN);
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DBG("Get signal %d, quit.\n", sig);
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}
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if(childpid > 0){ // parent process
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LOGERR("PID %d exit with status %d", getpid(), sig);
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}else{
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LOGWARN("Child %d died with %d", getpid(), sig);
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server_stop();
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}
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DBG("EXIT");
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}
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int main(int argc, char **argv){
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sl_init();
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parameters_t *G = parse_cmdline(&argc, &argv);
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if(!G) return 1;
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sl_loglevel_e lvl = G->verbose + LOGLEVEL_ERR;
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if(lvl >= LOGLEVEL_AMOUNT) lvl = LOGLEVEL_AMOUNT - 1;
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DBG("verb: %d, level: %d", G->verbose, lvl);
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int fd;
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if((fd = open(G->crdsfile, O_WRONLY | O_TRUNC | O_CREAT, 0644)) < 0) // test FITS-header file for writing
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ERR(_("Can't open %s for writing"), G->crdsfile);
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close(fd);
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if(G->sleept < 1) ERRX("Sleeping time sould be positive value");
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if(!server_setsleept(G->sleept)) ERRX("Can't set sleep time to %d", G->sleept);
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if(G->emulation) set_emulation_mode();
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else if(!mount_set_dev(G->device, G->serspeed, G->sertmout))
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ERRX("Can't open device %s @ %d", G->device, G->serspeed);
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if(!mount_set_name(G->mountname))
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ERRX("Can't set mount name to %s", G->mountname);
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signal(SIGTERM, signals);
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signal(SIGINT, signals);
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signal(SIGQUIT, signals);
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signal(SIGTSTP, SIG_IGN);
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signal(SIGHUP, signals);
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sl_check4running((char*)__progname, G->pidfile);
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if(G->logfile) OPENLOG(G->logfile, lvl, 1);
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DBG("Started");
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LOGMSG("Started, master PID=%d", getpid());
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#ifndef EBUG
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time_t lastd = 0;
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while(1){ // guard for dead processes
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childpid = fork();
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if(childpid < 0){
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LOGERR("fork() returns error");
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sleep(5);
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continue;
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}
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if(childpid){
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DBG("Created child with PID %d\n", childpid);
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wait(NULL);
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time_t t = time(NULL);
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if(t - lastd > 600){ // at least 10 minutes of work
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LOGERR("Child %d died\n", childpid);
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}
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lastd = t;
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WARNX("Child %d died\n", childpid);
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sleep(1);
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}else{
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prctl(PR_SET_PDEATHSIG, SIGTERM); // send SIGTERM to child when parent dies
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break; // go out to normal functional
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}
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}
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#endif
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server_sock_t sockt = {
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.cmd_isunix = G->isunix,
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.cmdnode = G->cmdnode,
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.stellport = G->port,
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.maxclients = G->maxclients,
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};
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if(!server_check(&sockt)){
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LOGERR("Can't run servers");
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ERRX("Can't run servers");
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}
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DBG("Run server");
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server_run();
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DBG("Server died");
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return 1;
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}
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