diff options
Diffstat (limited to 'src/lib/krad/t_daemon.h')
| -rw-r--r-- | src/lib/krad/t_daemon.h | 29 |
1 files changed, 11 insertions, 18 deletions
diff --git a/src/lib/krad/t_daemon.h b/src/lib/krad/t_daemon.h index 7c345a629..cbcb13253 100644 --- a/src/lib/krad/t_daemon.h +++ b/src/lib/krad/t_daemon.h @@ -51,8 +51,8 @@ daemon_stop(void) static krb5_boolean daemon_start(int argc, const char **argv) { - sigset_t set; - int sig; + int fds[2]; + char buf[1]; if (argc != 3 || argv == NULL) return FALSE; @@ -60,30 +60,23 @@ daemon_start(int argc, const char **argv) if (daemon_pid != 0) return TRUE; - if (sigemptyset(&set) != 0) - return FALSE; - - if (sigaddset(&set, SIGUSR1) != 0) - return FALSE; - - if (sigaddset(&set, SIGCHLD) != 0) - return FALSE; - - if (sigprocmask(SIG_BLOCK, &set, NULL) != 0) + if (pipe(fds) != 0) return FALSE; + /* Start the child process with the write end of the pipe as stdout. */ daemon_pid = fork(); if (daemon_pid == 0) { - close(STDOUT_FILENO); - open("/dev/null", O_WRONLY); + dup2(fds[1], STDOUT_FILENO); + close(fds[0]); + close(fds[1]); exit(execlp(argv[1], argv[1], argv[2], NULL)); } + close(fds[1]); - if (sigwait(&set, &sig) != 0 || sig == SIGCHLD) { - daemon_stop(); - daemon_pid = 0; + /* The child will write a sentinel character when it is listening. */ + if (read(fds[0], buf, 1) != 1 || *buf != '~') return FALSE; - } + close(fds[0]); atexit(daemon_stop); return TRUE; |