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* sysdeps/unix/sysv/linux/bits/waitflags.h

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(WSTOPPED, WEXITED, WCONTINUED, WNOWAIT): New macros.
	* sysdeps/unix/sysv/linux/kernel-features.h (__ASSUME_WAITID_SYSCALL):
	New macro.
	* sysdeps/unix/sysv/linux/waitid.c: New file.  Use new syscall when
	available, or fall back to the waitpid-based generic code.
This commit is contained in:
Roland McGrath 2004-09-01 19:39:17 +00:00
parent 66cc59de5b
commit 6698501fda
4 changed files with 88 additions and 1 deletions
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9
ChangeLog
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@ -1,3 +1,12 @@
2004-09-01 Roland McGrath <roland@redhat.com>
* sysdeps/unix/sysv/linux/bits/waitflags.h
(WSTOPPED, WEXITED, WCONTINUED, WNOWAIT): New macros.
* sysdeps/unix/sysv/linux/kernel-features.h (__ASSUME_WAITID_SYSCALL):
New macro.
* sysdeps/unix/sysv/linux/waitid.c: New file. Use new syscall when
available, or fall back to the waitpid-based generic code.
2004-08-14 Alfred M. Szmidt <ams@kemisten.nu>
* sysdeps/mach/hurd/i386/init-first.c (_hurd_stack_setup): Let gcc

8
sysdeps/unix/sysv/linux/bits/waitflags.h
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@ -1,5 +1,5 @@
/* Definitions of flag bits for `waitpid' et al.
Copyright (C) 1992, 1996, 1997, 2000 Free Software Foundation, Inc.
Copyright (C) 1992, 1996, 1997, 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
@ -26,5 +26,11 @@
#define WNOHANG 1 /* Don't block waiting. */
#define WUNTRACED 2 /* Report status of stopped children. */
/* Bits in the fourth argument to `waitid'. */
#define WSTOPPED 2 /* Report stopped child (same as WUNTRACED). */
#define WEXITED 4 /* Report dead child. */
#define WCONTINUED 8 /* Report continued child. */
#define WNOWAIT 0x01000000 /* Don't reap, just poll status. */
#define __WALL 0x40000000 /* Wait for any child. */
#define __WCLONE 0x80000000 /* Wait for cloned process. */

5
sysdeps/unix/sysv/linux/kernel-features.h
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@ -406,3 +406,8 @@
#if __LINUX_KERNEL_VERSION >= 132355
# define __ASSUME_BRK_PAGE_ROUNDED 1
#endif
/* Starting with version 2.6.9, the waitid system call is available. */
#if __LINUX_KERNEL_VERSION >= 0x020609
# define __ASSUME_WAITID_SYSCALL 1
#endif

67
sysdeps/unix/sysv/linux/waitid.c Normal file
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@ -0,0 +1,67 @@
/* Linux implementation of waitid.
Copyright (C) 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
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <errno.h>
#include <sys/wait.h>
#include <kernel-features.h>
#include <sysdep.h>
#ifdef __NR_waitid
# if __ASSUME_WAITID_SYSCALL > 0
static inline int
do_waitid (idtype_t idtype, id_t id, siginfo_t *infop, int options)
{
return INLINE_SYSCALL (waitid, 4, idtype, id, infop, options);
}
# define NO_DO_WAITID
# else
static int do_compat_waitid (idtype_t idtype, id_t id,
siginfo_t *infop, int options);
# define DO_WAITID do_compat_waitid
static int
do_waitid (idtype_t idtype, id_t id, siginfo_t *infop, int options)
{
static int waitid_works;
if (waitid_works > 0)
return INLINE_SYSCALL (waitid, 4, idtype, id, infop, options);
if (waitid_works == 0)
{
int result = INLINE_SYSCALL (waitid, 4, idtype, id, infop, options);
if (result < 0 && errno == ENOSYS)
waitid_works = -1;
else
{
waitid_works = 1;
return result;
}
}
return do_compat_waitid (idtype, id, infop, options);
}
# endif
#endif
#include "sysdeps/posix/waitid.c"