diff options
Diffstat (limited to 'sysdeps/posix/sigwait.c')
-rw-r--r-- | sysdeps/posix/sigwait.c | 108 |
1 files changed, 0 insertions, 108 deletions
diff --git a/sysdeps/posix/sigwait.c b/sysdeps/posix/sigwait.c deleted file mode 100644 index d807dbf72c..0000000000 --- a/sysdeps/posix/sigwait.c +++ /dev/null @@ -1,108 +0,0 @@ -/* Implementation of sigwait function from POSIX.1c. - Copyright (C) 1996-2017 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996. - - 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 <stddef.h> /* For NULL. */ -#include <sysdep-cancel.h> - -/* This is our dummy signal handler we use here. */ -static void ignore_signal (int sig); - -/* Place where to remember which signal we got. Please note that this - implementation cannot be used for the threaded libc. The - libpthread must provide an own version. */ -static int was_sig; - - -static int -do_sigwait (const sigset_t *set, int *sig) -{ - sigset_t tmp_mask; - struct sigaction saved[NSIG]; - struct sigaction action; - int save_errno; - int this; - - /* Prepare set. */ - __sigfillset (&tmp_mask); - - /* Unblock all signals in the SET and register our nice handler. */ - action.sa_handler = ignore_signal; - action.sa_flags = 0; - __sigfillset (&action.sa_mask); /* Block all signals for handler. */ - - /* Make sure we recognize error conditions by setting WAS_SIG to a - value which does not describe a legal signal number. */ - was_sig = -1; - - for (this = 1; this < NSIG; ++this) - if (__sigismember (set, this)) - { - /* Unblock this signal. */ - __sigdelset (&tmp_mask, this); - - /* Register temporary action handler. */ - if (__sigaction (this, &action, &saved[this]) != 0) - goto restore_handler; - } - - /* Now we can wait for signals. */ - __sigsuspend (&tmp_mask); - - restore_handler: - save_errno = errno; - - while (--this >= 1) - if (__sigismember (set, this)) - /* We ignore errors here since we must restore all handlers. */ - __sigaction (this, &saved[this], NULL); - - __set_errno (save_errno); - - /* Store the result and return. */ - *sig = was_sig; - return was_sig == -1 ? -1 : 0; -} - - -int -__sigwait (const sigset_t *set, int *sig) -{ - if (SINGLE_THREAD_P) - return do_sigwait (set, sig); - - int oldtype = LIBC_CANCEL_ASYNC (); - - int result = do_sigwait (set, sig); - - LIBC_CANCEL_RESET (oldtype); - - return result; -} -libc_hidden_def (__sigwait) -weak_alias (__sigwait, sigwait) - - -static void -ignore_signal (int sig) -{ - /* Remember the signal. */ - was_sig = sig; -} |