From 5606e4d6f92c10af214b54a01db79cf561067e58 Mon Sep 17 00:00:00 2001 From: Eric Andersen Date: Mon, 23 Oct 2000 23:23:54 +0000 Subject: More reorg. A place for everything and everything in its place... --- libc/signal/sigblock.c | 45 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) create mode 100644 libc/signal/sigblock.c (limited to 'libc/signal/sigblock.c') diff --git a/libc/signal/sigblock.c b/libc/signal/sigblock.c new file mode 100644 index 000000000..8edfe0df2 --- /dev/null +++ b/libc/signal/sigblock.c @@ -0,0 +1,45 @@ +/* Copyright (C) 1991 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 +#define __USE_BSD +#include + +/* Block signals in MASK, returning the old mask. */ +int sigblock (int mask) +{ + register int sig; + sigset_t set, oset; + + if (sigemptyset(&set) < 0) + return -1; + + for (sig = 1; sig < NSIG; ++sig) + if ((mask & sigmask(sig)) && sigaddset(&set, sig) < 0) + return -1; + + if (sigprocmask(SIG_BLOCK, &set, &oset) < 0) + return -1; + + mask = 0; + for (sig = 1; sig < NSIG; ++sig) + if (sigismember(&oset, sig)) + mask |= sigmask(sig); + + return mask; +} -- cgit v1.2.3