//	bfe2 - bochs connection//	Copyright (c) 1999-2003 Brand Huntsman and Lee Salzman//#include "common.h"#include "functions.h"//////////////////////////////////////////////////////////////////////////// globalFILE *writepipe, *readpipe;uint bochs_running, bochs_offline, p_step;int bochs_pid;// localgint sigio_tag;uint bochs_died, starting_bochs;//////////////////////////////////////////////////////////////////////////uint popen2( char *command, FILE **in, FILE **err ){	int ifd[2], efd [2];	if(in != NULL) pipe(ifd);	if(err != NULL) pipe(efd);	bochs_pid = fork();	if(bochs_pid == -1) return(0);	if(bochs_pid == 0){		char *argv[4];		argv[0] = "sh";		argv[1] = "-c";		argv[2] = command;		argv[3] = 0;g_print("CHILD-%d\n", bochs_pid);		if(in != NULL) dup2(ifd[0], STDIN_FILENO);		if(err != NULL) dup2(efd[1], STDERR_FILENO);		freopen("/dev/null", "a", stdout);		execv("/bin/sh", argv);		exit(EXIT_FAILURE);	} else {g_print("PARENT-%d\n", bochs_pid);		if(err != NULL) *err = fdopen(efd[0], "r");		if(in != NULL) *in = fdopen(ifd[1], "w");	}	return(1);}void sigchld_handler( int x ){g_print("DEAD-%d\n", bochs_pid);	if(starting_bochs) bfe_quit("Couldn't find Bochs");	bochs_died = 1;	// this will call the toggle_bochs() function in main.c	gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(bochs_button), FALSE);}void sigio_handler( gpointer data, gint source, GdkInputCondition condition ){	ctrlStop(1);}void set_ctrl_online( gboolean v ){	ctrlEnableControls(v);	breakpointsEnablePage(v);	watchpointsEnablePage(v);	memoryEnablePage(v);	structuresEnablePage(v);	prefsEnablePage(v);	gtk_widget_set_sensitive(refreshall_button, v);}//////////////////////////////////////////////////////////////////////////void hook_sigio( ){	sigio_tag = gdk_input_add(fileno(readpipe), GDK_INPUT_READ, sigio_handler, NULL);}void unhook_sigio( ){	gdk_input_remove(sigio_tag);}void bochsInit( ){	bochs_running = 0;	bochs_offline = 1;	bochs_died = 0;}void bochsShutdown( ){	signal(SIGCHLD, SIG_IGN);	if(bochs_running){		unhook_sigio();		if(!bochs_died) kill(bochs_pid, SIGINT);		bochs_running = 0;	}	if(bochs_died){		historyWrite("Lost connection to Bochs");		bochs_died = 0;	} else if(!bochs_offline){		historyWrite("Terminating Bochs");		fprintf(writepipe, "q\n");		fclose(readpipe);		fclose(writepipe);	}	set_ctrl_online(FALSE);	bochs_offline = 1;}void bochsStart( ){	#ifdef __DEBUG__	 g_print("BFE DEBUG: starting bochs... \n");	#endif	historyReset();g_print("START-%d\n", bochs_pid);	starting_bochs = 1;	signal(SIGCHLD, sigchld_handler);	if(!popen2(BOCHS_PATH, &writepipe, &readpipe)){		#ifdef __DEBUG__		 g_print("\tFAILED\n");		#endif		historyWrite("BOCHS FAILED TO START");		return;			// failed to start bochs	}	sleep(1);	starting_bochs = 0;	setbuf(readpipe, NULL);		// disable line buffering	setbuf(writepipe, NULL);	bochs_offline = 0;g_print("START-OK-%d\n", bochs_pid);	set_ctrl_online(TRUE);	historyWrite("Starting Bochs");	prompt_read();	fprintf(writepipe, "s\n");	ctrlGetInstruction();	breakpointsReload();	watchpointsReload();	#ifdef __DEBUG__	 g_print("\tOK\n");	#endif}void prompt_read( ){	char c;	if(bochs_offline) return;	#ifdef __DEBUG__	 g_print("BFE DEBUG: reading prompt... \n");	#endif	for(c = fgetc(readpipe); c != '<' && c != EOF; c = fgetc(readpipe));	if(c != '<') return;	if(fscanf(readpipe, "bochs:%u>", &p_step) != 1) return;	#ifdef __DEBUG__	 g_print("\tOK\n");	#endif}