summaryrefslogtreecommitdiff
path: root/source4/lib/util/signal.c
diff options
context:
space:
mode:
Diffstat (limited to 'source4/lib/util/signal.c')
-rw-r--r--source4/lib/util/signal.c144
1 files changed, 0 insertions, 144 deletions
diff --git a/source4/lib/util/signal.c b/source4/lib/util/signal.c
deleted file mode 100644
index ead947eb5e..0000000000
--- a/source4/lib/util/signal.c
+++ /dev/null
@@ -1,144 +0,0 @@
-/*
- Unix SMB/CIFS implementation.
- signal handling functions
-
- Copyright (C) Andrew Tridgell 1998
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 3 of the License, or
- (at your option) any later version.
-
- This program 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 General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#include "includes.h"
-#include "system/wait.h"
-
-/**
- * @file
- * @brief Signal handling
- */
-
-/****************************************************************************
- Catch child exits and reap the child zombie status.
-****************************************************************************/
-
-static void sig_cld(int signum)
-{
- while (waitpid((pid_t)-1,(int *)NULL, WNOHANG) > 0)
- ;
-
- /*
- * Turns out it's *really* important not to
- * restore the signal handler here if we have real POSIX
- * signal handling. If we do, then we get the signal re-delivered
- * immediately - hey presto - instant loop ! JRA.
- */
-
-#if !defined(HAVE_SIGACTION)
- CatchSignal(SIGCLD, sig_cld);
-#endif
-}
-
-/****************************************************************************
-catch child exits - leave status;
-****************************************************************************/
-
-static void sig_cld_leave_status(int signum)
-{
- /*
- * Turns out it's *really* important not to
- * restore the signal handler here if we have real POSIX
- * signal handling. If we do, then we get the signal re-delivered
- * immediately - hey presto - instant loop ! JRA.
- */
-
-#if !defined(HAVE_SIGACTION)
- CatchSignal(SIGCLD, sig_cld_leave_status);
-#endif
-}
-
-/**
- Block sigs.
-**/
-
-void BlockSignals(bool block, int signum)
-{
-#ifdef HAVE_SIGPROCMASK
- sigset_t set;
- sigemptyset(&set);
- sigaddset(&set,signum);
- sigprocmask(block?SIG_BLOCK:SIG_UNBLOCK,&set,NULL);
-#elif defined(HAVE_SIGBLOCK)
- if (block) {
- sigblock(sigmask(signum));
- } else {
- sigsetmask(siggetmask() & ~sigmask(signum));
- }
-#else
- /* yikes! This platform can't block signals? */
- static int done;
- if (!done) {
- DEBUG(0,("WARNING: No signal blocking available\n"));
- done=1;
- }
-#endif
-}
-
-/**
- Catch a signal. This should implement the following semantics:
-
- 1) The handler remains installed after being called.
- 2) The signal should be blocked during handler execution.
-**/
-
-void (*CatchSignal(int signum,void (*handler)(int )))(int)
-{
-#ifdef HAVE_SIGACTION
- struct sigaction act;
- struct sigaction oldact;
-
- ZERO_STRUCT(act);
-
- act.sa_handler = handler;
-#ifdef SA_RESTART
- /*
- * We *want* SIGALRM to interrupt a system call.
- */
- if(signum != SIGALRM)
- act.sa_flags = SA_RESTART;
-#endif
- sigemptyset(&act.sa_mask);
- sigaddset(&act.sa_mask,signum);
- sigaction(signum,&act,&oldact);
- return oldact.sa_handler;
-#else /* !HAVE_SIGACTION */
- /* FIXME: need to handle sigvec and systems with broken signal() */
- return signal(signum, handler);
-#endif
-}
-
-/**
- Ignore SIGCLD via whatever means is necessary for this OS.
-**/
-
-void CatchChild(void)
-{
- CatchSignal(SIGCLD, sig_cld);
-}
-
-/**
- Catch SIGCLD but leave the child around so it's status can be reaped.
-**/
-
-void CatchChildLeaveStatus(void)
-{
- CatchSignal(SIGCLD, sig_cld_leave_status);
-}