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- /* Copyright (C) 2014-2017 Free Software Foundation, Inc.
- 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 <signal.h>
- /* The signal used for asynchronous cancelation. */
- #define SIGCANCEL __SIGRTMIN
- /* Signal needed for the kernel-supported POSIX timer implementation.
- We can reuse the cancellation signal since we can distinguish
- cancellation from timer expirations. */
- #define SIGTIMER SIGCANCEL
- /* Signal used to implement the setuid et.al. functions. */
- #define SIGSETXID (__SIGRTMIN + 1)
- /* Return if sig is used internally. */
- static inline int
- __is_internal_signal (int sig)
- {
- return (sig == SIGCANCEL) || (sig == SIGTIMER) || (sig == SIGSETXID);
- }
- /* Remove internal signal from the mask. */
- static inline void
- __clear_internal_signals (sigset_t *set)
- {
- __sigdelset (set, SIGCANCEL);
- __sigdelset (set, SIGTIMER);
- __sigdelset (set, SIGSETXID);
- }
- #define SIGALL_SET \
- ((__sigset_t) { .__val = {[0 ... _SIGSET_NWORDS-1 ] = -1 } })
- /* Block all signals, including internal ones. */
- static inline int
- __libc_signal_block_all (sigset_t *set)
- {
- INTERNAL_SYSCALL_DECL (err);
- return INTERNAL_SYSCALL (rt_sigprocmask, err, 4, SIG_BLOCK, &SIGALL_SET,
- set, _NSIG / 8);
- }
- /* Block all application signals (excluding internal ones). */
- static inline int
- __libc_signal_block_app (sigset_t *set)
- {
- sigset_t allset = SIGALL_SET;
- __clear_internal_signals (&allset);
- INTERNAL_SYSCALL_DECL (err);
- return INTERNAL_SYSCALL (rt_sigprocmask, err, 4, SIG_BLOCK, &allset, set,
- _NSIG / 8);
- }
- /* Restore current process signal mask. */
- static inline int
- __libc_signal_restore_set (const sigset_t *set)
- {
- INTERNAL_SYSCALL_DECL (err);
- return INTERNAL_SYSCALL (rt_sigprocmask, err, 4, SIG_SETMASK, set, NULL,
- _NSIG / 8);
- }
- /* Used to communicate with signal handler. */
- extern struct xid_command *__xidcmd attribute_hidden;
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