/* Copyright (C) 1992, 1994, 1996 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., 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. */ int siginterrupt (sig, interrupt) int sig; 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 __set_errno (ENOSYS); return -1; #endif }