diff options
Diffstat (limited to 'libbb/vfork_daemon_rexec.c')
| -rw-r--r-- | libbb/vfork_daemon_rexec.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/libbb/vfork_daemon_rexec.c b/libbb/vfork_daemon_rexec.c index 37d4c274e..da0dc03e5 100644 --- a/libbb/vfork_daemon_rexec.c +++ b/libbb/vfork_daemon_rexec.c @@ -265,7 +265,14 @@ void FAST_FUNC bb_daemonize_or_rexec(int flags, char **argv) close(2); } - fd = xopen(bb_dev_null, O_RDWR); + fd = open(bb_dev_null, O_RDWR); + if (fd < 0) { + /* NB: we can be called as bb_sanitize_stdio() from init + * or mdev, and there /dev/null may legitimately not (yet) exist! + * Do not use xopen above, but obtain _ANY_ open descriptor, + * even bogus one as below. */ + fd = xopen("/", O_RDONLY); /* don't believe this can fail */ + } while ((unsigned)fd < 2) fd = dup(fd); /* have 0,1,2 open at least to /dev/null */ |