/* Examine and change blocked signals for a thread. Generic POSIX version. Copyright (C) 2014-2017 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 <pthreadP.h> #if defined SIGCANCEL || defined SIGTIMER || defined SIGSETXID # error "This implementation assumes no internal-only signal numbers." #endif int pthread_sigmask (int how, const sigset_t *newmask, sigset_t *oldmask) { /* Here we assume that sigprocmask actually does everything right. The only difference is the return value protocol. */ int result = sigprocmask (how, newmask, oldmask); if (result < 0) result = errno; return result; }