summaryrefslogtreecommitdiffstats
path: root/httpserver/signals.cc
diff options
context:
space:
mode:
Diffstat (limited to 'httpserver/signals.cc')
-rw-r--r--httpserver/signals.cc287
1 files changed, 287 insertions, 0 deletions
diff --git a/httpserver/signals.cc b/httpserver/signals.cc
new file mode 100644
index 0000000..4bda368
--- /dev/null
+++ b/httpserver/signals.cc
@@ -0,0 +1,287 @@
+/*
+* This file is part of rasdaman community.
+*
+* Rasdaman community 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.
+*
+* Rasdaman community 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 rasdaman community. If not, see <http://www.gnu.org/licenses/>.
+*
+* Copyright 2003, 2004, 2005, 2006, 2007, 2008, 2009 Peter Baumann /
+rasdaman GmbH.
+*
+* For more information please see <http://www.rasdaman.org>
+* or contact Peter Baumann via <baumann@rasdaman.com>.
+*/
+/*------------------------------------------------------------------------*/
+/* signals.c - signal handling stuff. */
+/*------------------------------------------------------------------------*/
+/*
+ * RCS:
+ * $RCSfile: signals.c,v $ $Revision: 1.8 $ $State: Exp $
+ * $Locker: $
+*/
+
+
+#include "defs.h"
+#include "protos.h"
+#include "server.h"
+
+extern struct ServerBase Server;
+
+
+/****** signals/Signal *******************************************************
+*
+* NAME
+*
+*
+* SYNOPSIS
+*
+*
+* FUNCTION
+*
+*
+* INPUTS
+*
+*
+* RESULT
+*
+*
+* NOTES
+* Own Signal() function, based on sigaction().
+*
+* BUGS
+*
+*
+* SEE ALSO
+*
+*
+******************************************************************************
+*
+*/
+
+sighandler Signal( int signo, sighandler x)
+{
+ struct sigaction SigAction;
+ struct sigaction OldAction;
+
+ SigAction.sa_handler = (void(*)(int))SigHandler;
+ sigemptyset( & SigAction.sa_mask );
+ SigAction.sa_flags = 0;
+
+ if( signo == SIGALRM )
+ {
+#ifdef SA_INTERRUPT
+ SigAction.sa_flags |= SA_INTERRUPT; /* SunOS */
+#endif
+ }
+ else
+ {
+#ifdef SA_RESTART
+ SigAction.sa_flags |= SA_RESTART; /* SVR4, 4.3+ BSD */
+#endif
+ }
+
+ if( sigaction( signo, &SigAction, &OldAction ) < 0 )
+ return( SIG_ERR );
+ return( OldAction.sa_handler );
+}
+
+
+/****** signals/SigHandler ***************************************************
+*
+* NAME
+* SigHandler -- Little Signal Handler.
+*
+* SYNOPSIS
+*
+*
+* FUNCTION
+*
+*
+* INPUTS
+*
+*
+* RESULT
+*
+*
+* NOTES
+*
+*
+* BUGS
+*
+*
+* SEE ALSO
+*
+*
+******************************************************************************
+*
+*/
+
+void SigHandler( int Signal )
+{
+ //not used(see line 169) char Buffer[PIPE_BUFFSIZE];
+ int errno_bak;
+ int ChildStatus;
+ pid_t ChildPId;
+ struct ChildBase *Child = NULL;
+
+ errno_bak = errno;
+ switch( Signal )
+ {
+ case SIGHUP:
+ LogMsg( LG_SERVER, INFO, "INFO: Received 'SIGHUP'." );
+ errno = errno_bak;
+ Exit( OK );
+ break;
+
+ case SIGINT:
+ LogMsg( LG_SERVER, INFO, "INFO: Received 'SIGINT'." );
+ errno = errno_bak;
+ Exit( OK );
+ break;
+
+ case SIGQUIT:
+ LogMsg( LG_SERVER, INFO, "INFO: Received 'SIGQUIT'." );
+ errno = errno_bak;
+ Exit( OK );
+ break;
+
+ case SIGUSR1:
+ LogMsg( LG_SERVER, INFO, "INFO: Received 'SIGUSR1'." );
+ // SaveCache( Server.Cache, Server.CacheFile );
+ break;
+
+ case SIGUSR2:
+ LogMsg( LG_SERVER, INFO, "INFO: Received 'SIGUSR2'." );
+ break;
+
+ case SIGPIPE:
+ LogMsg( LG_SERVER, INFO, "INFO: Received 'SIGPIPE'." );
+ break;
+
+ case SIGTERM:
+ LogMsg( LG_SERVER, INFO, "INFO: Received 'SIGTERM'." );
+ errno = errno_bak;
+ Exit( OK );
+ break;
+
+ case SIGCHLD:
+ LogMsg( LG_SERVER, INFO, "INFO: Received 'SIGCHLD'." );
+ ChildPId = waitpid( -1, &ChildStatus, WNOHANG );
+ while( ChildPId > 0 )
+ {
+ if( WIFEXITED( ChildStatus ) )
+ {
+ /*-- Has Child send a Message? --*/
+ if( WEXITSTATUS( ChildStatus ) == NOTE )
+ {
+ Child = GetChild( Server.ChildList, ChildPId );
+ if( Child != NULL )
+ {
+ /*
+ bzero( Buffer, PIPE_BUFFSIZE );
+ read( Child->PD[0], Buffer, PIPE_BUFFSIZE );
+ HandlePipeMsg( Buffer, Server.SubServerList, Server.Cache );
+ */
+ }
+ }
+ LogMsg( LG_SERVER, DEBUG,
+ "DEBUG: Child <%d> exited normally with status %d.",
+ ChildPId, WEXITSTATUS( ChildStatus ) );
+ }
+ else if( WIFSIGNALED( ChildStatus ) )
+ {
+ LogMsg( LG_SERVER, DEBUG,
+ "DEBUG: Child <%d> exited abnormally, signal number = %d.",
+ ChildPId, WTERMSIG( ChildStatus ) );
+ }
+ else if( WIFSTOPPED( ChildStatus ) )
+ {
+ LogMsg( LG_SERVER, DEBUG,
+ "DEBUG: Child <%d> is stopped, signal number = %d.",
+ ChildPId, WSTOPSIG( ChildStatus ) );
+ }
+ else
+ {
+ LogMsg( LG_SERVER, WARN,
+ "WARN: Something strange with Child <%d> (Status: %d).",
+ ChildPId, ChildStatus );
+ }
+
+ CleanupChild( Server.ChildList, &Server.PipeSets, ChildPId );
+ ChildPId = waitpid( -1, &ChildStatus, WNOHANG );
+
+ }
+ if( ChildPId == -1 && errno != ECHILD )
+ ErrorMsg( E_SYS, WARN, "WARN: waitpid() returned an Error.", errno );
+ LogMsg( LG_SERVER, DEBUG, "DEBUG: Exiting Signal Handler ..." );
+ break;
+ default:
+ ErrorMsg( E_PRIV, ERROR, "ERROR: Signal %d couldn't be handled!", Signal );
+ break;
+ }
+ errno = errno_bak;
+ return;
+}
+
+
+/****** signals/InitSigHandler ***********************************************
+*
+* NAME
+* InitSigHandler -- Minimum Signal Handler setup.
+*
+* SYNOPSIS
+*
+*
+* FUNCTION
+*
+*
+* INPUTS
+*
+*
+* RESULT
+*
+*
+* NOTES
+*
+*
+* BUGS
+*
+*
+* SEE ALSO
+*
+*
+******************************************************************************
+*
+*/
+
+rc_t InitSigHandler( void )
+{
+ if( Signal( SIGHUP, SigHandler ) == SIG_ERR )
+ ErrorMsg( E_SYS, ERROR, "ERROR: Installing Signal Handler (HUP)." );
+ if( Signal( SIGINT, SigHandler ) == SIG_ERR )
+ ErrorMsg( E_SYS, ERROR, "ERROR: Installing Signal Handler (INT)." );
+ if( Signal( SIGQUIT, SigHandler ) == SIG_ERR )
+ ErrorMsg( E_SYS, ERROR, "ERROR: Installing Signal Handler (QUIT)." );
+ if( Signal( SIGTERM, SigHandler ) == SIG_ERR )
+ ErrorMsg( E_SYS, ERROR, "ERROR: Installing Signal Handler (TERM)." );
+ if( Signal( SIGCHLD, SigHandler ) == SIG_ERR )
+ ErrorMsg( E_SYS, ERROR, "ERROR: Installing Signal Handler (CHLD)." );
+ if( Signal( SIGUSR1, SigHandler ) == SIG_ERR )
+ ErrorMsg( E_SYS, ERROR, "ERROR: Installing Signal Handler (USR1)." );
+ if( Signal( SIGUSR2, SigHandler ) == SIG_ERR )
+ ErrorMsg( E_SYS, ERROR, "ERROR: Installing Signal Handler (USR2)." );
+
+ if( Signal( SIGPIPE, SigHandler ) == SIG_ERR )
+ ErrorMsg( E_SYS, ERROR, "ERROR: Installing Signal Handler (PIPE)." );
+ return( OK );
+}
+
generated by cgit (git 2.34.1) at 2024-04-25 08:36:59 +0000