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- /* Copyright (C) 1992, 1994 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 <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. */
- int
- DEFUN(siginterrupt, (sig, interrupt),
- int sig AND int interrupt)
- {
- #ifdef SA_RESTART
- extern sigset_t _sigintr; /* Defined in signal.c. */
- struct sigaction action;
-
- if (__sigaction (sig, (struct sigaction *) NULL, &action) < 0)
- return -1;
-
- if (interrupt)
- {
- __sigaddset (&_sigintr, sig);
- action.sa_flags &= ~SA_RESTART;
- }
- else
- {
- __sigdelset (&_sigintr, sig);
- action.sa_flags |= SA_RESTART;
- }
-
- if (__sigaction (sig, &action, (struct sigaction *) NULL) < 0)
- return -1;
-
- return 0;
- #else
- errno = ENOSYS;
- return -1;
- #endif
- }
-