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Make this safe in environments that have a Real vfork(2). Bug pointed

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out by Chuck Cranor <chuck@netbsd.org>
This commit is contained in:
thorpej 1997-09-16 00:35:47 +00:00
parent 9a31fc02fe
commit 4ccbd4b430
1 changed files with 5 additions and 5 deletions
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10
lib/libc/gen/popen.c
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@ -1,4 +1,4 @@
/* $NetBSD: popen.c,v 1.14 1997/07/21 14:07:23 jtc Exp $ */
/* $NetBSD: popen.c,v 1.15 1997/09/16 00:35:47 thorpej Exp $ */
/*
* Copyright (c) 1988, 1993
@ -41,7 +41,7 @@
#if 0
static char sccsid[] = "@(#)popen.c 8.1 (Berkeley) 6/4/93";
#else
__RCSID("$NetBSD: popen.c,v 1.14 1997/07/21 14:07:23 jtc Exp $");
__RCSID("$NetBSD: popen.c,v 1.15 1997/09/16 00:35:47 thorpej Exp $");
#endif
#endif /* LIBC_SCCS and not lint */
@ -73,7 +73,7 @@ popen(program, type)
const char *program;
const char *type;
{
struct pid *cur;
struct pid *cur, *old;
FILE *iop;
int pdes[2], pid;
#ifdef __GNUC__
@ -118,8 +118,8 @@ popen(program, type)
/* POSIX.2 B.3.2.2 "popen() shall ensure that any streams
from previous popen() calls that remain open in the
parent process are closed in the new child process. */
for (cur = pidlist; cur; cur = cur->next)
close(fileno(cur->fp));
for (old = pidlist; old; old = old->next)
close(fileno(old->fp));
execl(_PATH_BSHELL, "sh", "-c", program, NULL);
_exit(127);