int create_sem(int *sem)
{
key_t ipckey;
union semun sem_union;
int s;
ipckey = IPC_PRIVATE;
s = semget(ipckey, 1, 0666|IPC_CREAT);
if(s == -1){
#ifdef DEBUG
write_log("semget error\n");
#endif
return -1;
}
/* init semapho=1 */
sem_union.val = 1;
if(semctl(s, 0, SETVAL, sem_union) == -1){
/* error */
remove_sem(s);
return -1;
}
/* save semapho id */
*sem = s;
return 0;
}
int main(int ac, char **arv)
{
int error;
#ifdef DEBUG
/* logfile=/var/log/log.txt */
create_log();
fprintf(log_path, "ac = %d\n", ac);
fflush(log_path);
#endif
/* setup signal handlers */
init_signals();
/* printer DEVICE ID and command line option check */
if((error = get_printer_devid()) < 0 || check_arg(ac,arv) < 0){
/*
Not Canon printer
or
"--gui" option not found
*/
#ifdef DEBUG
write_log("Now normal printing ......\n");
#endif
print_normal();
exit(0);
}
/* create semapho and other setup */
if((error = lm_init(PRNT_PATH))){
exit(0);
}
/* monitor_process/print_process/status_process start */
lm_main_fork();
/* delete semapho */
remove_sem(sem_id);
/* free memory (status monitor argv string) */
free_arg();
#ifdef DEBUG
write_log("LM end \n");
#endif
exit(0);
}
