/* Copyright (C) 2006-2016 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@redhat.com>, 2006. 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 <time.h> #include <sys/poll.h> #include <kernel-features.h> #include <sysdep-cancel.h> #ifdef __NR_ppoll # ifndef __ASSUME_PPOLL static int __generic_ppoll (struct pollfd *fds, nfds_t nfds, const struct timespec *timeout, const sigset_t *sigmask); # endif int ppoll (struct pollfd *fds, nfds_t nfds, const struct timespec *timeout, const sigset_t *sigmask) { /* The Linux kernel can in some situations update the timeout value. We do not want that so use a local variable. */ struct timespec tval; if (timeout != NULL) { tval = *timeout; timeout = &tval; } int result; result = SYSCALL_CANCEL (ppoll, fds, nfds, timeout, sigmask, _NSIG / 8); # ifndef __ASSUME_PPOLL if (result == -1 && errno == ENOSYS) result = __generic_ppoll (fds, nfds, timeout, sigmask); # endif return result; } libc_hidden_def (ppoll) # ifndef __ASSUME_PPOLL # define ppoll static __generic_ppoll # endif #endif #ifndef __ASSUME_PPOLL # include <io/ppoll.c> #endif