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115 lines
4.0 KiB
C
115 lines
4.0 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 <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 "server.h"
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// TCP socket port
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#define DEFAULT_PORT "55555"
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// baudrate - 9600
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#define DEFAULT_SERSPEED 9600
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// serial polling timeout - 100ms
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#define DEFAULT_SERTMOUT 100000
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typedef struct{
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char *device; // serial device name
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char *node; // port to connect or UNIX socket name
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char *logfile; // logfile name
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int isunix; // open UNIX-socket instead of TCP
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int verbose; // verbose level
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} parameters;
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static parameters G = {
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.node = DEFAULT_PORT,
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};
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static int help;
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static sl_option_t cmdlnopts[] = {
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{"help", NO_ARGS, NULL, 'h', arg_int, APTR(&help), "show this help"},
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{"device", NEED_ARG, NULL, 'd', arg_string, APTR(&G.device), "serial device name"},
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{"node", NEED_ARG, NULL, 'n', arg_string, APTR(&G.node), "UNIX socket name or network port to connect (default: " DEFAULT_PORT ")"},
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{"logfile", NEED_ARG, NULL, 'l', arg_string, APTR(&G.logfile), "save logs to file"},
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{"unix", NO_ARGS, NULL, 'u', arg_int, APTR(&G.isunix), "open UNIX-socket instead of TCP"},
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{"verbose", NO_ARGS, NULL, 'v', arg_none, APTR(&G.verbose), "logging verbose level (each -v adds one)"},
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end_option
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};
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void signals(int sig){
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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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LOGERR("Exit with status %d", sig);
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}else LOGERR("Exit");
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exit(sig);
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}
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int main(int argc, char **argv){
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sl_init();
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sl_parseargs(&argc, &argv, cmdlnopts);
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if(help) sl_showhelp(-1, cmdlnopts);
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if(!G.node) ERRX("Point node");
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if(!G.device) ERRX("Point path to serial device");
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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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if(G.logfile) OPENLOG(G.logfile, lvl, 1);
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LOGMSG("Started");
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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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#ifndef EBUG
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time_t lastd = 0;
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while(1){ // guard for dead processes
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pid_t childpid = fork();
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if(childpid){
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DBG("Created child with PID %d\n", childpid);
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LOGMSG("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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sl_socktype_e type = (G.isunix) ? SOCKT_UNIX : SOCKT_NETLOCAL;
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sl_tty_t *serial = sl_tty_new(G.device, DEFAULT_SERSPEED, 4096);
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if(serial) serial = sl_tty_open(serial, 1);
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if(!serial){
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LOGERR("Can't open serial device %s", G.device);
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ERRX("Can't open serial device %s", G.device);
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}
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sl_tty_tmout(DEFAULT_SERTMOUT);
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server_run(type, G.node, serial);
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LOGERR("Unreacheable code reached!");
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return 1;
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}
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