-void memory_full(int size)
-{
- syslog(LOG_ERR, _("Memory exhausted (last is %s:%d) (couldn't allocate %d bytes), exiting."), cp_file, cp_line, size);
- exit(1);
-}
-
-/*
- Detach from current terminal, write pidfile, kill parent
-*/
-int detach(void)
-{
- int fd;
- pid_t pid;
-
- if(do_detach)
- {
- ppid = getpid();
-
- if((pid = fork()) < 0)
- {
- perror("fork");
- return -1;
- }
- if(pid) /* parent process */
- {
- signal(SIGTERM, parent_exit);
- sleep(600); /* wait 10 minutes */
- exit(1);
- }
- }
-
- if(write_pidfile())
- return -1;
-
- if(do_detach)
- {
- if((fd = open("/dev/tty", O_RDWR)) >= 0)
- {
- if(ioctl(fd, TIOCNOTTY, NULL))
- {
- perror("ioctl");
- return -1;
- }
- close(fd);
- }
-
- if(setsid() < 0)
- return -1;
-
- kill(ppid, SIGTERM);
- }
-
- chdir("/"); /* avoid keeping a mointpoint busy */
-
- openlog(identname, LOG_CONS | LOG_PID, LOG_DAEMON);
-
- if(debug_lvl > DEBUG_NOTHING)
- syslog(LOG_NOTICE, _("tincd %s (%s %s) starting, debug level %d"),
- VERSION, __DATE__, __TIME__, debug_lvl);
- else
- syslog(LOG_NOTICE, _("tincd %s starting"), VERSION);
-
- xalloc_fail_func = memory_full;
-
- return 0;
-}
-
-/*
- Close network connections, and terminate neatly
-*/
-void cleanup_and_exit(int c)
-{
- close_network_connections();
-
- if(debug_lvl > DEBUG_NOTHING)
- syslog(LOG_INFO, _("Total bytes written: tap %d, socket %d; bytes read: tap %d, socket %d"),
- total_tap_out, total_socket_out, total_tap_in, total_socket_in);
-
- closelog();
- kill(ppid, SIGTERM);
- exit(c);
-}
-
-/*
- check for an existing tinc for this net, and write pid to pidfile
-*/
-int write_pidfile(void)
-{
- int pid;
-
- if((pid = check_pid(pidfilename)))
- {
- if(netname)
- fprintf(stderr, _("A tincd is already running for net `%s' with pid %d.\n"),
- netname, pid);
- else
- fprintf(stderr, _("A tincd is already running with pid %d.\n"), pid);
- return 1;
- }
-
- /* if it's locked, write-protected, or whatever */
- if(!write_pid(pidfilename))
- return 1;
-
- return 0;
-}
-
-/*
- kill older tincd for this net
-*/
-int kill_other(void)
-{
- int pid;
-
- if(!(pid = read_pid(pidfilename)))
- {
- if(netname)
- fprintf(stderr, _("No other tincd is running for net `%s'.\n"), netname);
- else
- fprintf(stderr, _("No other tincd is running.\n"));
- return 1;
- }
-
- errno = 0; /* No error, sometimes errno is only changed on error */
- /* ESRCH is returned when no process with that pid is found */
- if(kill(pid, SIGTERM) && errno == ESRCH)
- fprintf(stderr, _("Removing stale lock file.\n"));
- remove_pid(pidfilename);
-
- return 0;
-}
-