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- /* Copyright (C) 1991 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public License as
- published by the Free Software Foundation; either version 2 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
- Library General Public License for more details.
-
- You should have received a copy of the GNU Library General Public
- License along with the GNU C Library; see the file COPYING.LIB. If
- not, write to the Free Software Foundation, Inc., 675 Mass Ave,
- Cambridge, MA 02139, USA. */
-
- #include <ansidecl.h>
- #include <sysdep.h>
- #include <errno.h>
- #include <stddef.h>
- #include <signal.h>
-
-
- /* If ACT is not NULL, change the action for SIG to *ACT.
- If OACT is not NULL, put the old action for SIG in *OACT. */
- int
- DEFUN(__sigaction, (sig, act, oact),
- int sig AND CONST struct sigaction *act AND struct sigaction *oact)
- {
- struct sigvec vec, ovec;
-
- if (sig <= 0 || sig >= NSIG)
- {
- errno = EINVAL;
- return -1;
- }
-
- if (act != NULL)
- {
- vec.sv_mask = act->sa_mask;
- vec.sv_handler = act->sa_handler;
- vec.sv_flags = (((act->sa_flags & SA_ONSTACK) ? SV_ONSTACK : 0) |
- (!(act->sa_flags & SA_RESTART) ? SV_INTERRUPT : 0));
- }
-
- if (__sigvec(sig, act != NULL ? &vec : (struct sigvec *) NULL, &ovec) < 0)
- return -1;
-
- if (oact != NULL)
- {
- oact->sa_handler = (void EXFUN((*), (int))) ovec.sv_handler;
- oact->sa_mask = ovec.sv_mask;
- oact->sa_flags = (((ovec.sv_flags & SV_ONSTACK) ? SA_ONSTACK : 0) |
- (!(ovec.sv_flags & SV_INTERRUPT) ? SA_RESTART : 0));
- }
-
- return 0;
- }
-