diff options
Diffstat (limited to 'libbb')
| -rw-r--r-- | libbb/vfork_daemon_rexec.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/libbb/vfork_daemon_rexec.c b/libbb/vfork_daemon_rexec.c index a75eafb..ed1f86f 100644 --- a/libbb/vfork_daemon_rexec.c +++ b/libbb/vfork_daemon_rexec.c @@ -253,11 +253,19 @@ void FAST_FUNC bb_daemonize_or_rexec(int flags, char **argv) if (!(flags & DAEMON_ONLY_SANITIZE)) { if (fork_or_rexec(argv)) exit(EXIT_SUCCESS); /* parent */ - /* if daemonizing, make sure we detach from stdio & ctty */ + /* if daemonizing, detach from stdio & ctty */ setsid(); dup2(fd, 0); dup2(fd, 1); dup2(fd, 2); + if (flags & DAEMON_DOUBLE_FORK) { + /* On Linux, session leader can acquire ctty + * unknowingly, by opening a tty. + * Prevent this: stop being a session leader. + */ + if (fork_or_rexec(argv)) + exit(EXIT_SUCCESS); /* parent */ + } } while (fd > 2) { close(fd--); |