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71 lines
2.0 KiB
C
71 lines
2.0 KiB
C
/* Copyright (C) 1997-2017 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 License as
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published by the Free Software Foundation; either version 2.1 of the
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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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#include <string.h>
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#include <sysdep.h>
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#include <sys/syscall.h>
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#define SA_RESTORER 0x04000000
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/* The difference here is that the sigaction structure used in the
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kernel is not the same as we use in the libc. Therefore we must
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translate it here. */
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#include <kernel_sigaction.h>
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int
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__libc_sigaction (int sig, const struct sigaction *act, struct sigaction *oact)
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{
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int result;
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struct kernel_sigaction kact;
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struct kernel_sigaction koact;
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if (act)
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{
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kact.k_sa_handler = act->sa_handler;
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memcpy (&kact.sa_mask, &act->sa_mask, sizeof (sigset_t));
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kact.sa_flags = act->sa_flags;
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#ifdef HAVE_SA_RESTORER
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if (kact.sa_flags & SA_RESTORER)
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kact.sa_restorer = act->sa_restorer;
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#endif
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}
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result = INLINE_SYSCALL (rt_sigaction, 4, sig,
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act ? &kact : NULL,
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oact ? &koact : NULL, _NSIG / 8);
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if (result >= 0 || errno != ENOSYS)
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{
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if (oact && result >= 0)
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{
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oact->sa_handler = koact.k_sa_handler;
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memcpy (&oact->sa_mask, &koact.sa_mask, sizeof (sigset_t));
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oact->sa_flags = koact.sa_flags;
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#ifdef HAVE_SA_RESTORER
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oact->sa_restorer = koact.sa_restorer;
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#endif
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}
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}
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return result;
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}
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libc_hidden_def (__libc_sigaction)
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#include <nptl/sigaction.c>
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