| /* 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 <stddef.h> |
| #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) |
| { |
| /* The unused fifth argument is a `struct rusage *' that we could |
| pass if we were using waitid to simulate wait3/wait4. */ |
| return INLINE_SYSCALL (waitid, 5, idtype, id, infop, options, NULL); |
| } |
| # 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, 5, idtype, id, infop, options, NULL); |
| if (waitid_works == 0) |
| { |
| int result = INLINE_SYSCALL (waitid, 5, |
| idtype, id, infop, options, NULL); |
| 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" |