diff options
Diffstat (limited to 'FICS/ficsmain.c')
| -rw-r--r-- | FICS/ficsmain.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/FICS/ficsmain.c b/FICS/ficsmain.c index 5a52951..dd47740 100644 --- a/FICS/ficsmain.c +++ b/FICS/ficsmain.c @@ -71,6 +71,49 @@ BrokenPipe(int sig) } PRIVATE void +daemonize(void) +{ + int fd[2]; + mode_t mode[2]; + + mode[0] = (S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH); + mode[1] = (S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH); + + if (file_exists(DAEMON_LOCKFILE)) { + errx(1, "%s: %s: already exists\ndelete the file manually and " + "try again after making sure that no copy of the program " + "is already running in the background", + __func__, + DAEMON_LOCKFILE); + } else if ((fd[0] = open(DAEMON_LOCKFILE, (O_CREAT | O_RDWR), + mode[0])) == -1) + err(1, "%s: open(%s, ...)", __func__, DAEMON_LOCKFILE); + + dprintf(fd[0], "%jd\n", (intmax_t)getpid()); + close(fd[0]); + + if ((fd[1] = open(DAEMON_LOGFILE, (O_APPEND | O_CREAT | O_RDWR), + mode[1])) == -1) + err(1, "%s: open(%s, ...)", __func__, DAEMON_LOGFILE); + else if (daemon(1, 1) == -1) { + int i; + + i = errno; + close(fd[1]); + errno = i; + + err(1, "%s: failed to run in the background", __func__); + } + + (void) dup2(fd[1], STDIN_FILENO); + (void) dup2(fd[1], STDOUT_FILENO); + (void) dup2(fd[1], STDERR_FILENO); + + if (fd[1] > 2) + close(fd[1]); +} + +PRIVATE void GetArgs(int argc, char *argv[]) { port = DEFAULT_PORT; @@ -91,6 +134,9 @@ GetArgs(int argc, char *argv[]) exit(1); withConsole = 1; break; + case 'd': + daemonize(); + break; case 'h': usage(argv[0]); break; |