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/* Set a signal handler, trying to turning on the SA_RESTART bit
Copyright (C) 1997, 2000, 2007 Free Software Foundation, Inc.
Written by Miles Bader <miles@gnu.ai.mit.edu>
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 3, or (at
your option) any later version.
This program 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
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#ifdef HAVE_STDLIB_H
# include <stdlib.h>
#endif
#include <signal.h>
/* This is exactly like the traditional signal function, but turns on the
SA_RESTART bit where possible. */
sig_t
setsig (int sig, sig_t handler)
{
#ifdef HAVE_SIGACTION
struct sigaction sa;
sigemptyset (&sa.sa_mask);
# ifdef SA_RESTART
sa.sa_flags = SA_RESTART;
# endif
sa.sa_handler = handler;
sigaction (sig, &sa, &sa);
return sa.sa_handler;
#else /* !HAVE_SIGACTION */
# ifdef HAVE_SIGVEC
struct sigvec sv;
sigemptyset (&sv.sv_mask);
sv.sv_handler = handler;
sigvec (sig, &sv, &sv);
return sv.sv_handler;
# else /* !HAVE_SIGVEC */
return signal (sig, handler);
# endif /* HAVE_SIGVEC */
#endif /* HAVE_SIGACTION */
}
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