From 28f540f45bbacd939bfd07f213bcad2bf730b1bf Mon Sep 17 00:00:00 2001 From: Roland McGrath Date: Sat, 18 Feb 1995 01:27:10 +0000 Subject: initial import --- sysdeps/posix/sigintr.c | 57 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 57 insertions(+) create mode 100644 sysdeps/posix/sigintr.c (limited to 'sysdeps/posix/sigintr.c') diff --git a/sysdeps/posix/sigintr.c b/sysdeps/posix/sigintr.c new file mode 100644 index 0000000000..441c643df8 --- /dev/null +++ b/sysdeps/posix/sigintr.c @@ -0,0 +1,57 @@ +/* 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 +#include +#include +#include + +/* 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 +} -- cgit 1.4.1