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63 lines
1.9 KiB
C
63 lines
1.9 KiB
C
/* Copyright (C) 1991,1995,1996,1997,2002,2004 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 <sysdep.h>
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#include <errno.h>
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#include <stddef.h>
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#include <signal.h>
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/* If ACT is not NULL, change the action for SIG to *ACT.
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If OACT is not NULL, put the old action for SIG in *OACT. */
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int
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__sigaction (sig, act, oact)
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int sig;
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const struct sigaction *act;
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struct sigaction *oact;
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{
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struct sigvec vec, ovec;
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if (sig <= 0 || sig >= NSIG)
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{
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__set_errno (EINVAL);
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return -1;
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}
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if (act != NULL)
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{
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vec.sv_mask = act->sa_mask;
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vec.sv_handler = act->sa_handler;
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vec.sv_flags = (((act->sa_flags & SA_ONSTACK) ? SV_ONSTACK : 0) |
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(!(act->sa_flags & SA_RESTART) ? SV_INTERRUPT : 0));
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}
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if (__sigvec(sig, act != NULL ? &vec : (struct sigvec *) NULL, &ovec) < 0)
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return -1;
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if (oact != NULL)
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{
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oact->sa_handler = (void (*) (int)) ovec.sv_handler;
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oact->sa_mask = ovec.sv_mask;
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oact->sa_flags = (((ovec.sv_flags & SV_ONSTACK) ? SA_ONSTACK : 0) |
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(!(ovec.sv_flags & SV_INTERRUPT) ? SA_RESTART : 0));
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}
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return 0;
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}
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libc_hidden_def (__sigaction)
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weak_alias (__sigaction, sigaction)
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