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/*
Common.c is part of FreeControl Package
Copyright (C) 2009, 2010 Quique Rodiguez <[email protected]>
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
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 <http://www.gnu.org/licenses/>.
*/
#include <getopt.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <sys/msg.h>
#include <fcntl.h>
#include <signal.h>
#include <unistd.h>
#define RUNNING_DIR "/tmp"
const char* program_name;
extern char** environ;
int print_copyright()
{
printf("%s\n\n", program_name);
printf("Copyright (C) 2009, 2010 Quique Rodiguez <[email protected]>\n\n");
printf("This program is free software: you can redistribute it and/or modify\n");
printf("it under the terms of the GNU General Public License as published by\n");
printf("the Free Software Foundation, either version 3 of the License, or\n");
printf("any later version.\n\n");
printf("This program is distributed in the hope that it will be useful,\n");
printf("but WITHOUT ANY WARRANTY; without even the implied warranty of\n");
printf("MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n");
printf("GNU General Public License for more details.\n\n");
printf("You should have received a copy of the GNU General Public License\n");
printf("along with this program. If not, see <http://www.gnu.org/licenses/>.\n\n");
}
int print_usage()
{
printf("Usage:\n\n");
printf(" %s -lrskvh\n\n", program_name);
printf(" -l --load Load the program and stay resident.\n");
printf(" -r --run Run the program.\n");
printf(" -s --stop Stop the program.\n");
printf(" -k --kill Kill the program.\n");
printf(" -v --view Shows the state of the program\n");
printf(" -h --help Shows this help.\n\n");
}
void log_message(filename,message)
char *filename;
char *message;
{
FILE *logfile;
logfile=fopen(filename,"a");
if(!logfile) return;
fprintf(logfile,"%s\n",message);
fclose(logfile);
}
void signal_handler(sig)
int sig;
{
switch(sig) {
case SIGUSR1:
view_stat();
break;
case SIGTERM:
log_message(LOG_FILE,"terminate signal catched");
ending();
exit(0);
break;
}
}
void daemonize()
{
int i,lfp;
char str[10];
//if(getppid()==1) return; /* already a daemon */
//i=fork();
//if (i<0) exit(1); /* fork error */
//if (i>0) exit(0); /* parent exits */
/* child (daemon) continues */
// setsid(); /* obtain a new process group */
// for (i=getdtablesize();i>=0;--i) close(i); /* close all descriptors */
//i=open("/dev/null",O_RDWR); dup(i); dup(i); /* handle standart I/O */
// umask(027); /* set newly created file permissions */
// chdir(RUNNING_DIR); /* change running directory */
// lfp=open(LOCK_FILE,O_RDWR|O_CREAT,0640);
// if (lfp<0) exit(1); /* can not open */
// if (lockf(lfp,F_TLOCK,0)<0) exit(0); /* can not lock */
/* first instance continues */
// sprintf(str,"%d\n",getpid());
// write(lfp,str,strlen(str)); /* record pid to lockfile */
signal(SIGCHLD,SIG_IGN); /* ignore child */
signal(SIGTSTP,SIG_IGN); /* ignore tty signals */
signal(SIGTTOU,SIG_IGN);
signal(SIGTTIN,SIG_IGN);
signal(SIGUSR1,signal_handler); /* catch user1 signal */
signal(SIGTERM,signal_handler); /* catch kill signal */
}
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