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94 lines
2.7 KiB
C
94 lines
2.7 KiB
C
/* Copyright (C) 1997-2013 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <signal.h>
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#define __need_NULL
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#include <stddef.h>
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#include <string.h>
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#include <sysdep-cancel.h>
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#include <sys/syscall.h>
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#include <bp-checks.h>
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#ifdef __NR_rt_sigtimedwait
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static int
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do_sigwaitinfo (const sigset_t *set, siginfo_t *info)
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{
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#ifdef SIGCANCEL
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sigset_t tmpset;
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if (set != NULL
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&& (__builtin_expect (__sigismember (set, SIGCANCEL), 0)
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# ifdef SIGSETXID
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|| __builtin_expect (__sigismember (set, SIGSETXID), 0)
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# endif
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))
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{
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/* Create a temporary mask without the bit for SIGCANCEL set. */
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// We are not copying more than we have to.
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memcpy (&tmpset, set, _NSIG / 8);
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__sigdelset (&tmpset, SIGCANCEL);
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# ifdef SIGSETXID
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__sigdelset (&tmpset, SIGSETXID);
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# endif
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set = &tmpset;
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}
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#endif
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/* XXX The size argument hopefully will have to be changed to the
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real size of the user-level sigset_t. */
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int result = INLINE_SYSCALL (rt_sigtimedwait, 4, CHECK_SIGSET (set),
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CHECK_1 (info), NULL, _NSIG / 8);
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/* The kernel generates a SI_TKILL code in si_code in case tkill is
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used. tkill is transparently used in raise(). Since having
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SI_TKILL as a code is useful in general we fold the results
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here. */
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if (result != -1 && info != NULL && info->si_code == SI_TKILL)
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info->si_code = SI_USER;
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return result;
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}
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/* Return any pending signal or wait for one for the given time. */
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int
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__sigwaitinfo (set, info)
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const sigset_t *set;
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siginfo_t *info;
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{
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if (SINGLE_THREAD_P)
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return do_sigwaitinfo (set, info);
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int oldtype = LIBC_CANCEL_ASYNC ();
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/* XXX The size argument hopefully will have to be changed to the
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real size of the user-level sigset_t. */
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int result = do_sigwaitinfo (set, info);
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LIBC_CANCEL_RESET (oldtype);
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return result;
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}
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libc_hidden_def (__sigwaitinfo)
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weak_alias (__sigwaitinfo, sigwaitinfo)
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#else
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# include <signal/sigwaitinfo.c>
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#endif
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strong_alias (__sigwaitinfo, __libc_sigwaitinfo)
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