diff options
Diffstat (limited to 'REORG.TODO/sysdeps/unix/sysv/linux/sigwaitinfo.c')
-rw-r--r-- | REORG.TODO/sysdeps/unix/sysv/linux/sigwaitinfo.c | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/unix/sysv/linux/sigwaitinfo.c b/REORG.TODO/sysdeps/unix/sysv/linux/sigwaitinfo.c new file mode 100644 index 0000000000..5a044f08e3 --- /dev/null +++ b/REORG.TODO/sysdeps/unix/sysv/linux/sigwaitinfo.c @@ -0,0 +1,73 @@ +/* Copyright (C) 1997-2017 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, see + <http://www.gnu.org/licenses/>. */ + +#include <errno.h> +#include <signal.h> +#define __need_NULL +#include <stddef.h> +#include <string.h> + +#include <nptl/pthreadP.h> +#include <sysdep-cancel.h> +#include <sys/syscall.h> + +#ifdef __NR_rt_sigtimedwait + +/* Return any pending signal or wait for one for the given time. */ +int +__sigwaitinfo (const sigset_t *set, siginfo_t *info) +{ +#ifdef SIGCANCEL + sigset_t tmpset; + if (set != NULL + && (__builtin_expect (__sigismember (set, SIGCANCEL), 0) +# ifdef SIGSETXID + || __builtin_expect (__sigismember (set, SIGSETXID), 0) +# endif + )) + { + /* Create a temporary mask without the bit for SIGCANCEL set. */ + // We are not copying more than we have to. + memcpy (&tmpset, set, _NSIG / 8); + __sigdelset (&tmpset, SIGCANCEL); +# ifdef SIGSETXID + __sigdelset (&tmpset, SIGSETXID); +# endif + set = &tmpset; + } +#endif + + /* XXX The size argument hopefully will have to be changed to the + real size of the user-level sigset_t. */ + int result = SYSCALL_CANCEL (rt_sigtimedwait, set, info, NULL, _NSIG / 8); + + /* The kernel generates a SI_TKILL code in si_code in case tkill is + used. tkill is transparently used in raise(). Since having + SI_TKILL as a code is useful in general we fold the results + here. */ + if (result != -1 && info != NULL && info->si_code == SI_TKILL) + info->si_code = SI_USER; + + return result; +} + +libc_hidden_def (__sigwaitinfo) +weak_alias (__sigwaitinfo, sigwaitinfo) +#else +# include <signal/sigwaitinfo.c> +#endif +strong_alias (__sigwaitinfo, __libc_sigwaitinfo) |