/* 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> #include <string.h> #include <nptl/pthreadP.h> #include <sysdep-cancel.h> #include <sys/syscall.h> #ifdef __NR_rt_sigtimedwait int __sigtimedwait (const sigset_t *set, siginfo_t *info, const struct timespec *timeout) { #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, timeout, _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 (__sigtimedwait) weak_alias (__sigtimedwait, sigtimedwait) #else # include <signal/sigtimedwait.c> #endif