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PR lib/53615

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Before invoking a previous signal handler, make sure it is not SIG_*.
Fix potential crash with SIGWINCH.

OK roy
This commit is contained in:
rin 2018-09-18 22:51:00 +00:00
parent 88ccf2cadc
commit 1e421f65db
1 changed files with 6 additions and 3 deletions
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9
lib/libcurses/tstp.c
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@ -1,4 +1,4 @@
/* $NetBSD: tstp.c,v 1.42 2017/01/06 13:53:18 roy Exp $ */
/* $NetBSD: tstp.c,v 1.43 2018/09/18 22:51:00 rin Exp $ */
/*
* Copyright (c) 1981, 1993, 1994
@ -34,7 +34,7 @@
#if 0
static char sccsid[] = "@(#)tstp.c 8.3 (Berkeley) 5/4/94";
#else
__RCSID("$NetBSD: tstp.c,v 1.42 2017/01/06 13:53:18 roy Exp $");
__RCSID("$NetBSD: tstp.c,v 1.43 2018/09/18 22:51:00 rin Exp $");
#endif
#endif /* not lint */
@ -150,7 +150,10 @@ __winch_signal_handler(/*ARGSUSED*/int signo)
* If there was a previous handler, call that,
* otherwise tell getch() to send KEY_RESIZE.
*/
if (owsa.sa_handler != NULL)
if (owsa.sa_handler != SIG_DFL &&
owsa.sa_handler != SIG_IGN &&
owsa.sa_handler != SIG_ERR &&
owsa.sa_handler != SIG_HOLD)
owsa.sa_handler(signo);
else
_cursesi_screen->resized = 1;