hush: remove one sigprocmask from exit path
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/shell/hush.c b/shell/hush.c
index 89a13fe..bb95d63 100644
--- a/shell/hush.c
+++ b/shell/hush.c
@@ -1456,13 +1456,15 @@
static void sigexit(int sig) NORETURN;
static void sigexit(int sig)
{
- /* Disable all signals: job control, SIGPIPE, etc. */
- sigprocmask_allsigs(SIG_BLOCK);
-
/* Careful: we can end up here after [v]fork. Do not restore
* tty pgrp then, only top-level shell process does that */
- if (G_saved_tty_pgrp && getpid() == G.root_pid)
+ if (G_saved_tty_pgrp && getpid() == G.root_pid) {
+ /* Disable all signals: job control, SIGPIPE, etc.
+ * Mostly paranoid measure, to prevent infinite SIGTTOU.
+ */
+ sigprocmask_allsigs(SIG_BLOCK);
tcsetpgrp(G_interactive_fd, G_saved_tty_pgrp);
+ }
/* Not a signal, just exit */
if (sig <= 0)