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2004-10-30 Andreas Schwab <schwab@suse.de> * sysdeps/unix/sysv/linux/waitid.c: Include <stddef.h> for NULL. 2004-10-30 Ulrich Drepper <drepper@redhat.com> * malloc/malloc.c (_int_free): Use unique comments for the error cases.
72 lines
2.0 KiB
C
72 lines
2.0 KiB
C
/* Linux implementation of waitid.
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Copyright (C) 2004 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <stddef.h>
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#include <errno.h>
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#include <sys/wait.h>
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#include <kernel-features.h>
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#include <sysdep.h>
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#ifdef __NR_waitid
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# if __ASSUME_WAITID_SYSCALL > 0
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static inline int
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do_waitid (idtype_t idtype, id_t id, siginfo_t *infop, int options)
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{
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/* The unused fifth argument is a `struct rusage *' that we could
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pass if we were using waitid to simulate wait3/wait4. */
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return INLINE_SYSCALL (waitid, 5, idtype, id, infop, options, NULL);
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}
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# define NO_DO_WAITID
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# else
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static int do_compat_waitid (idtype_t idtype, id_t id,
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siginfo_t *infop, int options);
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# define DO_WAITID do_compat_waitid
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static int
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do_waitid (idtype_t idtype, id_t id, siginfo_t *infop, int options)
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{
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static int waitid_works;
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if (waitid_works > 0)
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return INLINE_SYSCALL (waitid, 5, idtype, id, infop, options, NULL);
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if (waitid_works == 0)
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{
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int result = INLINE_SYSCALL (waitid, 5,
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idtype, id, infop, options, NULL);
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if (result < 0 && errno == ENOSYS)
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waitid_works = -1;
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else
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{
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waitid_works = 1;
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return result;
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}
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}
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return do_compat_waitid (idtype, id, infop, options);
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}
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# endif
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#endif
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#include "sysdeps/posix/waitid.c"
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