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/* Copyright (C) 1992, 1994, 1996, 2002 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 Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <stddef.h>
#include <signal.h>
#include <errno.h>
/* If INTERRUPT is nonzero, make signal SIG interrupt system calls
(causing them to fail with EINTR); if INTERRUPT is zero, make system
calls be restarted after signal SIG. */
#ifdef SA_RESTART
extern sigset_t _sigintr attribute_hidden; /* Defined in signal.c. */
#endif
int siginterrupt (int sig, int interrupt)
{
#ifdef SA_RESTART
struct sigaction action;
/* Fails if sig is bad. */
if (sigaction (sig, NULL, &action) < 0)
return -1;
if (interrupt)
{
__sigaddset (&_sigintr, sig);
action.sa_flags &= ~SA_RESTART;
}
else
{
__sigdelset (&_sigintr, sig);
action.sa_flags |= SA_RESTART;
}
return sigaction (sig, &action, NULL);
#else
__set_errno (ENOSYS);
return -1;
#endif
}
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