Get rid of the signal handler

SDL covers this via e.g. SDL_QUIT event on ctrl+c.

neo/CMakeLists.txt

@@ -663,7 +663,6 @@ if (APPLE)
 		sys/events.cpp
 		sys/sys_local.cpp
 		sys/posix/posix_net.cpp
-		sys/posix/posix_signal.cpp
 		sys/posix/posix_main.cpp
 	)
 
@@ -700,7 +699,6 @@ else()
 		sys/events.cpp
 		sys/sys_local.cpp
 		sys/posix/posix_net.cpp
-		sys/posix/posix_signal.cpp
 		sys/posix/posix_main.cpp
 		sys/linux/main.cpp
 	)

neo/sys/posix/posix_main.cpp

@@ -87,8 +87,6 @@ void Posix_Exit(int ret) {
 			Sys_Printf( "tcsetattr failed: %s\n", strerror( errno ) );
 		}
 	}
-	// at this point, too late to catch signals
-	Posix_ClearSigs();
 
 	// process spawning. it's best when it happens after everything has shut down
 	if ( exit_spawn[0] ) {
@@ -360,7 +358,6 @@ Posix_EarlyInit
 */
 void Posix_EarlyInit( void ) {
 	exit_spawn[0] = '\0';
-	Posix_InitSigs();
 }
 
 /*

neo/sys/posix/posix_public.h

@@ -40,9 +40,6 @@ void		Posix_EarlyInit( );
 // called after common has been initialized
 void		Posix_LateInit( );
 
-void		Posix_InitSigs( );
-void		Posix_ClearSigs( );
-
 void		Posix_Exit( int ret );
 void		Posix_SetExit(int ret); // override the exit code
 void		Posix_SetExitSpawn( const char *exeName ); // set the process to be spawned when we quit

neo/sys/posix/posix_signal.cpp

@@ -1,141 +0,0 @@
-/*
-===========================================================================
-
-Doom 3 GPL Source Code
-Copyright (C) 1999-2011 id Software LLC, a ZeniMax Media company.
-
-This file is part of the Doom 3 GPL Source Code ("Doom 3 Source Code").
-
-Doom 3 Source Code 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.
-
-Doom 3 Source Code 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 Doom 3 Source Code.  If not, see <http://www.gnu.org/licenses/>.
-
-In addition, the Doom 3 Source Code is also subject to certain additional terms. You should have received a copy of these additional terms immediately following the terms and conditions of the GNU General Public License which accompanied the Doom 3 Source Code.  If not, please request a copy in writing from id Software at the address below.
-
-If you have questions concerning this license or the applicable additional terms, you may contact in writing id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.
-
-===========================================================================
-*/
-
-#include <string.h>
-#include <unistd.h>
-#include <errno.h>
-
-#include "sys/platform.h"
-#include "framework/Common.h"
-
-#include "sys/posix/posix_public.h"
-
-const int siglist[] = {
-	SIGHUP,
-	SIGQUIT,
-	SIGILL,
-	SIGTRAP,
-	SIGIOT,
-	SIGBUS,
-	SIGSEGV,
-	SIGPIPE,
-	SIGABRT,
-	//	SIGTTIN,
-	//	SIGTTOU,
-	-1
-	};
-
-const char *signames[] = {
-	"SIGHUP",
-	"SIGQUIT",
-	"SIGILL",
-	"SIGTRAP",
-	"SIGIOT",
-	"SIGBUS",
-	"SIGSEGV",
-	"SIGPIPE",
-	"SIGABRT",
-	//	"SIGTTIN",
-	//	"SIGTTOUT"
-};
-
-/*
-================
-Posix_ClearSigs
-================
-*/
-void Posix_ClearSigs( ) {
-	struct sigaction action;
-	int i;
-
-	/* Set up the structure */
-	action.sa_handler = SIG_DFL;
-	sigemptyset( &action.sa_mask );
-	action.sa_flags = 0;
-
-	i = 0;
-	while ( siglist[ i ] != -1 ) {
-		if ( sigaction( siglist[ i ], &action, NULL ) != 0 ) {
-			Sys_Printf( "Failed to reset %s handler: %s\n", signames[ i ], strerror( errno ) );
-		}
-		i++;
-	}
-}
-
-/*
-================
-sig_handler
-================
-*/
-static void sig_handler( int signum, siginfo_t *info, void *context ) {
-	static bool double_fault = false;
-
-	if ( double_fault ) {
-		Sys_Printf( "double fault %s, bailing out\n", strsignal( signum ) );
-		_exit( signum );
-	}
-
-	double_fault = true;
-
-	// NOTE: see sigaction man page, could verbose the whole siginfo_t and print human readable si_code
-	Sys_Printf( "signal caught: %s\nsi_code %d\n", strsignal( signum ), info->si_code );
-
-	Sys_Printf( "Trying to exit gracefully..\n" );
-
-	Posix_SetExit( signum );
-
-	common->Quit();
-}
-
-/*
-================
-Posix_InitSigs
-================
-*/
-void Posix_InitSigs( ) {
-	struct sigaction action;
-	int i;
-
-	/* Set up the structure */
-	action.sa_sigaction = sig_handler;
-	sigemptyset( &action.sa_mask );
-	action.sa_flags = SA_SIGINFO | SA_NODEFER;
-
-	i = 0;
-	while ( siglist[ i ] != -1 ) {
-		if ( sigaction( siglist[ i ], &action, NULL ) != 0 ) {
-			Sys_Printf( "Failed to set %s handler: %s\n", signames[ i ], strerror( errno ) );
-		}
-		i++;
-	}
-
-	// if the process is backgrounded (running non interactively)
-	// then SIGTTIN or SIGTOU could be emitted, if not caught, turns into a SIGSTP
-	signal( SIGTTIN, SIG_IGN );
-	signal( SIGTTOU, SIG_IGN );
-}