/*    pconsole WJ101    Copyright (C) 2001  Walter de Jong <walter@heiho.net>    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 2 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, write to the Free Software    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA*//*	pconsole.c	WJ101*/#include "config.h"#include "pconsole.h"#include "commands.h"#include "cstring.h"#include "terminal.h"#include "Conn.h"#include <stdio.h>#include <unistd.h>#include <errno.h>#include <signal.h>#include <sys/stat.h>#include <sys/types.h>#ifdef HAVE_SYS_IOCTL_H#include <sys/ioctl.h>#endif#define KEY_CTRL(x)		((x) - 'A' + 1)int flags = FLAGS_ECHO;void command_mode(void) {char buf[256], *p;	terminal_mode(TERMINAL_COOKED);	printf("\n"		"pconsole command mode\n"		">>> ");	fflush(stdout);	flags |= FLAGS_CMD_MODE;	while((p = fgets(buf, 256, stdin)) != NULL) {		cstrip_line(buf);		if (*buf)			pcommand(buf);		if (flags & FLAGS_CMD_MODE) {			if (*buf)				printf("\n");			printf(">>> ");			fflush(stdout);		} else			break;	}	if (p == NULL) {		if (AllConns == NULL) {			printf("\n\n");			terminal_mode(TERMINAL_COOKED);			exit(0);		} else			printf("<Ctrl-D>\n");	}	flags &= ~FLAGS_CMD_MODE;	printf("\n"		"Press <Ctlr-A> for command mode\n"		"> ");	fflush(stdout);	terminal_mode(TERMINAL_RAW);}void pconsole(void) {int key, typed = 0;char kar;Conn *c, *c_next;	if (AllConns == NULL)		command_mode();										/* start in command mode */	else {		printf("\n"			"Press <Ctlr-A> for command mode\n"			"> ");		fflush(stdout);		terminal_mode(TERMINAL_RAW);	}	while(read(fileno(stdin), &kar, 1) > 0) {		key = kar & 0xff;		if (key == 1) {										/* Ctrl-A => command mode */			printf("<Ctrl-A>\n");			command_mode();			continue;		}		if (key == KEY_CTRL('S')) {							/* Ctrl-S => toggle echo */			printf("<Ctrl-S> ");			cmd_echo(NULL);			printf("> ");			fflush(stdout);			typed = 0;			continue;		}		if (key == '\r' || key == '\n') {					/* return */			printf("\n> ");			fflush(stdout);			typed = 0;		} else {			if (flags & FLAGS_ECHO) {				if (key == 0x7f || key == '\b') {			/* backspace */					if (typed) {						printf("\b \b");						fflush(stdout);						typed--;					}				} else {					if (key >= ' ' && key <= '~') {						fputc(key, stdout);						typed++;					} else {						switch(key) {							case 0x1b:								printf("<Esc>");								break;							case '\t':								printf("<Tab>");								break;							default:								printf("<Ctrl-%c>", key - 1 + 'A');						}						printf("\n> ");						typed = 0;					}					fflush(stdout);				}			}		}/*	put character in everyones input buffer*/		for(c = AllConns; c != NULL; c = c_next) {			c_next = c->next;			if (c->fd > 0) {				seteuid(0);											/* regain root privs */				if (ioctl(c->fd, TIOCSTI, &kar) == -1) {			/* simulate terminal input */					seteuid(getuid());								/* drop root privs again */					printf("\nioctl() : %s\n", strerror(errno));					if (c->hostname != NULL)						printf("detaching from %s#%s\n", c->hostname, c->dev);					else						printf("detaching from %s\n", c->dev);					remove_Conn(c);					destroy_Conn(c);				} else					seteuid(getuid());								/* drop the root privs */			}		}		if (AllConns == NULL)			command_mode();	}}RETSIGTYPE sig_exit(int sig) {	cmd_exit(NULL);	exit(127 + sig);				/* never reached... but hey */}int main(int argc, char **argv) {	if (geteuid()) {		fprintf(stderr, "You must be root to run this program or this program should be setuid root.\n");		return -1;	}	if (seteuid(getuid())) {				/* drop root privs */		fprintf(stderr, "failed to drop root privileges\n");		exit(-1);	}	if (!isatty(fileno(stdin))) {		fprintf(stderr, "pconsole: not a tty\n");		return -1;	}	printf("pconsole WJ101\n");	signal(SIGTERM, sig_exit);	signal(SIGINT, sig_exit);	if (argc > 1)		cmd_attach(&argv[1]);	pconsole();	cmd_exit(NULL);	return 0;}/* EOB */