Offer post-crash safe settings on a per-mod basis

Offer to restore settings when loading a mod that crashed, not the first
mod that gets loaded after a crash. Before the first mod loaded (usually
baseq3) would get the option even if missionpack or some other mod crashed.

- Make pid files separate for each fs_game.
- Remove/write pid every time switching fs_game.
- Create path before writing pid file otherwise it fails on first run.
- Show mod description.txt or fs_game instead of engine name in abnormal
  exit message.
- Check com_fullyInitialized in Com_Error before removing PID,
  otherwise "ioquake3 --version" segfaults when accessing fs_gamevar->string
  (plus not fully initialized isn't really a normal shutdown).

code/qcommon/common.c

@@ -2776,17 +2776,7 @@ void Com_Init( char *commandLine ) {
 
 	Sys_Init();
 
-	if( Sys_WritePIDFile( ) ) {
-#ifndef DEDICATED
-		const char *message = "The last time " CLIENT_WINDOW_TITLE " ran, "
-			"it didn't exit properly. This may be due to inappropriate video "
-			"settings. Would you like to start with \"safe\" video settings?";
-
-		if( Sys_Dialog( DT_YES_NO, message, "Abnormal Exit" ) == DR_YES ) {
-			Cvar_Set( "com_abnormalExit", "1" );
-		}
-#endif
-	}
+	Sys_InitPIDFile( FS_GetCurrentGameDir() );
 
 	// Pick a random port value
 	Com_RandomBytes( (byte*)&qport, sizeof(int) );

code/qcommon/files.c

@@ -2482,6 +2482,33 @@ static char** Sys_ConcatenateFileLists( char **list0, char **list1 )
 	return cat;
 }
 
+/*
+================
+FS_GetModDescription
+================
+*/
+void FS_GetModDescription( const char *modDir, char *description, int descriptionLen ) {
+	fileHandle_t	descHandle;
+	char			descPath[MAX_QPATH];
+	int				nDescLen;
+	FILE			*file;
+
+	Com_sprintf( descPath, sizeof ( descPath ), "%s/description.txt", modDir );
+	nDescLen = FS_SV_FOpenFileRead( descPath, &descHandle );
+
+	if ( nDescLen > 0 && descHandle ) {
+		file = FS_FileForHandle(descHandle);
+		Com_Memset( description, 0, descriptionLen );
+		nDescLen = fread(description, 1, descriptionLen, file);
+		if (nDescLen >= 0) {
+			description[nDescLen] = '\0';
+		}
+		FS_FCloseFile(descHandle);
+	} else {
+		Q_strncpyz( description, modDir, descriptionLen );
+	}
+}
+
 /*
 ================
 FS_GetModList
@@ -2496,8 +2523,7 @@ int	FS_GetModList( char *listbuf, int bufsize ) {
 	char **pFiles = NULL;
 	char **pPaks = NULL;
 	char *name, *path;
-	char descPath[MAX_OSPATH];
-	fileHandle_t descHandle;
+	char description[MAX_OSPATH];
 
 	int dummy;
 	char **pFiles0 = NULL;
@@ -2571,28 +2597,13 @@ int	FS_GetModList( char *listbuf, int bufsize ) {
 				nLen = strlen(name) + 1;
 				// nLen is the length of the mod path
 				// we need to see if there is a description available
-				descPath[0] = '\0';
-				strcpy(descPath, name);
-				strcat(descPath, "/description.txt");
-				nDescLen = FS_SV_FOpenFileRead( descPath, &descHandle );
-				if ( nDescLen > 0 && descHandle) {
-					FILE *file;
-					file = FS_FileForHandle(descHandle);
-					Com_Memset( descPath, 0, sizeof( descPath ) );
-					nDescLen = fread(descPath, 1, 48, file);
-					if (nDescLen >= 0) {
-						descPath[nDescLen] = '\0';
-					}
-					FS_FCloseFile(descHandle);
-				} else {
-					strcpy(descPath, name);
-				}
-				nDescLen = strlen(descPath) + 1;
+				FS_GetModDescription( name, description, sizeof( description ) );
+				nDescLen = strlen(description) + 1;
 
 				if (nTotal + nLen + 1 + nDescLen + 1 < bufsize) {
 					strcpy(listbuf, name);
 					listbuf += nLen;
-					strcpy(listbuf, descPath);
+					strcpy(listbuf, description);
 					listbuf += nDescLen;
 					nTotal += nLen + nDescLen;
 					nMods++;
@@ -3999,6 +4010,9 @@ void FS_Restart( int checksumFeed ) {
 	}
 
 	if ( Q_stricmp(fs_gamedirvar->string, lastValidGame) ) {
+		Sys_RemovePIDFile( lastValidGame );
+		Sys_InitPIDFile( fs_gamedirvar->string );
+
 		// skip the q3config.cfg if "safe" is on the command line
 		if ( !Com_SafeMode() ) {
 			Cbuf_AddText ("exec " Q3CONFIG_CFG "\n");

code/qcommon/qcommon.h

@@ -637,6 +637,8 @@ int		FS_LoadStack( void );
 int		FS_GetFileList(  const char *path, const char *extension, char *listbuf, int bufsize );
 int		FS_GetModList(  char *listbuf, int bufsize );
 
+void	FS_GetModDescription( const char *modDir, char *description, int descriptionLen );
+
 fileHandle_t	FS_FOpenFileWrite( const char *qpath );
 fileHandle_t	FS_FOpenFileAppend( const char *filename );
 fileHandle_t	FS_FCreateOpenPipeFile( const char *filename );
@@ -1145,7 +1147,8 @@ typedef enum
 
 dialogResult_t Sys_Dialog( dialogType_t type, const char *message, const char *title );
 
-qboolean Sys_WritePIDFile( void );
+void Sys_RemovePIDFile( const char *gamedir );
+void Sys_InitPIDFile( const char *gamedir );
 
 /* This is based on the Adaptive Huffman algorithm described in Sayood's Data
  * Compression book.  The ranks are not actually stored, but implicitly defined

code/sys/sys_main.c

@@ -167,16 +167,29 @@ char *Sys_GetClipboardData(void)
 Sys_PIDFileName
 =================
 */
-static char *Sys_PIDFileName( void )
+static char *Sys_PIDFileName( const char *gamedir )
 {
 	const char *homePath = Cvar_VariableString( "fs_homepath" );
 
 	if( *homePath != '\0' )
-		return va( "%s/%s", homePath, PID_FILENAME );
+		return va( "%s/%s/%s", homePath, gamedir, PID_FILENAME );
 
 	return NULL;
 }
 
+/*
+=================
+Sys_RemovePIDFile
+=================
+*/
+void Sys_RemovePIDFile( const char *gamedir )
+{
+	char *pidFile = Sys_PIDFileName( gamedir );
+
+	if( pidFile != NULL )
+		remove( pidFile );
+}
+
 /*
 =================
 Sys_WritePIDFile
@@ -184,9 +197,9 @@ Sys_WritePIDFile
 Return qtrue if there is an existing stale PID file
 =================
 */
-qboolean Sys_WritePIDFile( void )
+static qboolean Sys_WritePIDFile( const char *gamedir )
 {
-	char      *pidFile = Sys_PIDFileName( );
+	char      *pidFile = Sys_PIDFileName( gamedir );
 	FILE      *f;
 	qboolean  stale = qfalse;
 
@@ -212,6 +225,10 @@ qboolean Sys_WritePIDFile( void )
 			stale = qtrue;
 	}
 
+	if( FS_CreatePath( pidFile ) ) {
+		return 0;
+	}
+
 	if( ( f = fopen( pidFile, "w" ) ) != NULL )
 	{
 		fprintf( f, "%d", Sys_PID( ) );
@@ -223,6 +240,31 @@ qboolean Sys_WritePIDFile( void )
 	return stale;
 }
 
+/*
+=================
+Sys_InitPIDFile
+=================
+*/
+void Sys_InitPIDFile( const char *gamedir ) {
+	if( Sys_WritePIDFile( gamedir ) ) {
+#ifndef DEDICATED
+		char message[1024];
+		char modName[MAX_OSPATH];
+
+		FS_GetModDescription( gamedir, modName, sizeof ( modName ) );
+		Q_CleanStr( modName );
+
+		Com_sprintf( message, sizeof (message), "The last time %s ran, "
+			"it didn't exit properly. This may be due to inappropriate video "
+			"settings. Would you like to start with \"safe\" video settings?", modName );
+
+		if( Sys_Dialog( DT_YES_NO, message, "Abnormal Exit" ) == DR_YES ) {
+			Cvar_Set( "com_abnormalExit", "1" );
+		}
+#endif
+	}
+}
+
 /*
 =================
 Sys_Exit
@@ -238,13 +280,10 @@ static __attribute__ ((noreturn)) void Sys_Exit( int exitCode )
 	SDL_Quit( );
 #endif
 
-	if( exitCode < 2 )
+	if( exitCode < 2 && com_fullyInitialized )
 	{
 		// Normal exit
-		char *pidFile = Sys_PIDFileName( );
-
-		if( pidFile != NULL )
-			remove( pidFile );
+		Sys_RemovePIDFile( FS_GetCurrentGameDir() );
 	}
 
 	NET_Shutdown( );