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* posix/spawn.h [__USE_GNU]: Define POSIX_SPAWN_USEVFORK.
	* posix/spawnattr_setflags.c: Check whether any unknown bit is set
	in FLAGS parameter and fail if this is the case.
	* sysdeps/posix/spawni.c: Use vfork if POSIX_SPAWN_USEVFORK flag is
	set.
This commit is contained in:
Ulrich Drepper 2004-09-12 18:05:37 +00:00
parent cf244b74a0
commit 9ad684229e
4 changed files with 33 additions and 8 deletions
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6
ChangeLog
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@ -1,5 +1,11 @@
2004-09-12 Ulrich Drepper <drepper@redhat.com>
* posix/spawn.h [__USE_GNU]: Define POSIX_SPAWN_USEVFORK.
* posix/spawnattr_setflags.c: Check whether any unknown bit is set
in FLAGS parameter and fail if this is the case.
* sysdeps/posix/spawni.c: Use vfork if POSIX_SPAWN_USEVFORK flag is
set.
* nscd/pwdcache.c (cache_addpw): Sync also negative results to disk.
* nscd/grpcache.c (cache_addgr): Likewise.
* nscd/hstcache.c (cache_addhst): Likewise.

5
posix/spawn.h
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@ -1,5 +1,5 @@
/* Definitions for POSIX spawn interface.
Copyright (C) 2000, 2003 Free Software Foundation, Inc.
Copyright (C) 2000, 2003, 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@ -57,6 +57,9 @@ typedef struct
#define POSIX_SPAWN_SETSIGMASK 0x08
#define POSIX_SPAWN_SETSCHEDPARAM 0x10
#define POSIX_SPAWN_SETSCHEDULER 0x20
#ifdef __USE_GNU
# define POSIX_SPAWN_USEVFORK 0x40
#endif
__BEGIN_DECLS

15
posix/spawnattr_setflags.c
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@ -1,4 +1,4 @@
/* Copyright (C) 2000 Free Software Foundation, Inc.
/* Copyright (C) 2000, 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@ -16,13 +16,26 @@
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <errno.h>
#include <spawn.h>
#include <string.h>
#define ALL_FLAGS (POSIX_SPAWN_RESETIDS \
| POSIX_SPAWN_SETPGROUP \
| POSIX_SPAWN_SETSIGDEF \
| POSIX_SPAWN_SETSIGMASK \
| POSIX_SPAWN_SETSCHEDPARAM \
| POSIX_SPAWN_SETSCHEDULER \
| POSIX_SPAWN_USEVFORK)
/* Store flags in the attribute structure. */
int
posix_spawnattr_setflags (posix_spawnattr_t *attr, short int flags)
{
/* Check no invalid bits are set. */
if (flags & ~ALL_FLAGS)
return EINVAL;
/* Store the flag word. */
attr->__flags = flags;

15
sysdeps/posix/spawni.c
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@ -1,5 +1,5 @@
/* Guts of POSIX spawn interface. Generic POSIX.1 version.
Copyright (C) 2000,01,02, 2003 Free Software Foundation, Inc.
Copyright (C) 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@ -76,10 +76,16 @@ __spawni (pid_t *pid, const char *file,
char *path, *p, *name;
size_t len;
size_t pathlen;
short int flags;
/* Do this once. */
short int flags = attrp == NULL ? 0 : attrp->__flags;
/* Generate the new process. */
new_pid = __fork ();
if (flags & POSIX_SPAWN_USEVFORK)
new_pid = __vfork ();
else
new_pid = __fork ();
if (new_pid != 0)
{
if (new_pid < 0)
@ -92,9 +98,6 @@ __spawni (pid_t *pid, const char *file,
return 0;
}
/* Do this once. */
flags = attrp == NULL ? 0 : attrp->__flags;
/* Set signal mask. */
if ((flags & POSIX_SPAWN_SETSIGMASK) != 0
&& __sigprocmask (SIG_SETMASK, &attrp->__ss, NULL) != 0)