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Fix PR/2900: Handle case where the signal mask is NULL.

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christos 1996-10-29 00:02:01 +00:00
parent 59b640b2fc
commit faad20023f
1 changed files with 10 additions and 6 deletions
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16
usr.bin/mail/popen.c
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@ -1,4 +1,4 @@
/* $NetBSD: popen.c,v 1.4 1996/06/08 19:48:35 christos Exp $ */
/* $NetBSD: popen.c,v 1.5 1996/10/29 00:02:01 christos Exp $ */
/*
* Copyright (c) 1980, 1993
@ -37,7 +37,7 @@
#if 0
static char sccsid[] = "@(#)popen.c 8.1 (Berkeley) 6/6/93";
#else
static char rcsid[] = "$NetBSD: popen.c,v 1.4 1996/06/08 19:48:35 christos Exp $";
static char rcsid[] = "$NetBSD: popen.c,v 1.5 1996/10/29 00:02:01 christos Exp $";
#endif
#endif /* not lint */
@ -282,10 +282,14 @@ prepare_child(nset, infd, outfd)
dup2(infd, 0);
if (outfd >= 0)
dup2(outfd, 1);
for (i = 1; i <= NSIG; i++)
if (sigismember(nset, i))
(void) signal(i, SIG_IGN);
if (!sigismember(nset, SIGINT))
if (nset == NULL)
return;
if (nset != NULL) {
for (i = 1; i <= NSIG; i++)
if (sigismember(nset, i))
(void) signal(i, SIG_IGN);
}
if (nset == NULL || !sigismember(nset, SIGINT))
(void) signal(SIGINT, SIG_DFL);
sigfillset(&fset);
(void) sigprocmask(SIG_UNBLOCK, &fset, NULL);