deb-mbse/mbsebbs/door.c

/*****************************************************************************
 *
 * $Id$
 * Purpose ...............: Run external door
 *
 *****************************************************************************
 * Copyright (C) 1997-2002 
 *   
 * Michiel Broek		FIDO:		2:280/2802
 * Beekmansbos 10
 * 1971 BV IJmuiden
 * the Netherlands
 *
 * This file is part of MBSE BBS.
 *
 * This BBS 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, or (at your option) any
 * later version.
 *
 * MBSE BBS 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 MBSE BBS; see the file COPYING.  If not, write to the Free
 * Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
 *****************************************************************************/

#include "../lib/libs.h"
#include "../lib/mbse.h"
#include "../lib/structs.h"
#include "../lib/users.h"
#include "../lib/records.h"
#include "../lib/common.h"
#include "../lib/clcomm.h"
#include "input.h"
#include "timeout.h"
#include "exitinfo.h"
#include "whoson.h"
#include "door.h"


extern time_t	t_start;
extern int	e_pid;
extern char	**environ;



char *Gdate(time_t, int);
char *Gdate(time_t tt, int Y2K)
{
        static char     GLC[15];
        struct tm       *tm;

        tm = localtime(&tt);
        if (Y2K)
                sprintf(GLC, "%02d-%02d-%04d", tm->tm_mon +1, tm->tm_mday, tm->tm_year + 1900);
        else
                sprintf(GLC, "%02d-%02d-%02d", tm->tm_mon +1, tm->tm_mday, tm->tm_year % 100);

        return (GLC);
}



char *Rdate(char *, int);
char *Rdate(char *ind, int Y2K)
{
        static char     GLC[15];

        memset(&GLC, 0, sizeof(GLC));
        GLC[0] = ind[3];
        GLC[1] = ind[4];
        GLC[2] = '-';
        GLC[3] = ind[0];
        GLC[4] = ind[1];
        GLC[5] = '-';
        if (Y2K) {
                GLC[6] = ind[6];
                GLC[7] = ind[7];
                GLC[8] = ind[8];
                GLC[9] = ind[9];
        } else {
                GLC[6] = ind[8];
                GLC[7] = ind[9];
        }

        return GLC;
}



/*
 * Function will run a external program or door
 */
void ExtDoor(char *Program, int NoDoorsys, int Y2Kdoorsys, int Comport, int NoSuid)
{
	char	*String, *String1;
	int	i, rc;
	char	*temp1;
	FILE	*fp;

	temp1 = calloc(PATH_MAX, sizeof(char));
	String = calloc(81, sizeof(char));

	WhosDoingWhat(DOOR);

	if ((strstr(Program, "/N")) != NULL) {
	    sprintf(temp1, "%d", iNode);
	    strreplace(Program, (char *)"/N", temp1);
	}

	if ((strstr(Program, "/A")) != NULL) {
		colour(3, 0);
		if ((String = strstr(Program, "/T=")) != NULL) {
			String1 = String + 3;
			printf("\n%s", String1);
		} else
			printf("\nPlease enter filename: ");

		fflush(stdout);
		colour(CFG.InputColourF, CFG.InputColourB);
		GetstrC(temp1, 80);

		strreplace(Program, (char *)"/A", temp1);

		for(i = 0; i < strlen(Program); i++) {
			if (*(Program + i) == '\0')
				break;
			if (*(Program + i) == '/')
				*(Program + i) = '\0';
		}
	}

	free(String);
	Syslog('+', "Door: %s", Program);
	ReadExitinfo();
	alarm_set((exitinfo.iTimeLeft * 60) - 10);
	Altime((exitinfo.iTimeLeft * 60));

	/*
	 * Always remove the old door.sys first.
	 */
	sprintf(temp1, "%s/%s/door.sys", CFG.bbs_usersdir, exitinfo.Name);
	unlink(temp1);

	/*
	 * Write door.sys in users homedirectory
	 */
	if (!NoDoorsys) {
		if ((fp = fopen(temp1, "w+")) == NULL) {
			WriteError("$Can't create %s", temp1);
		} else {
			if (Comport) {
				fprintf(fp, "COM1:\r\n"); /* COM port             */
				fprintf(fp, "19200\r\n");/* Effective baudrate   */

			} else {
				fprintf(fp, "COM0:\r\n");/* COM port		*/
				fprintf(fp, "0\r\n");	/* Effective baudrate	*/
			}
			fprintf(fp, "8\r\n");		/* Databits		*/
			fprintf(fp, "%d\r\n", iNode);	/* Node number		*/
			if (Comport)
				fprintf(fp, "19200\r\n");/* Locked baudrate	*/
			else
				fprintf(fp, "%ld\r\n", ttyinfo.portspeed); /* Locked baudrate */
			fprintf(fp, "Y\r\n");		/* Screen display	*/
			fprintf(fp, "N\r\n");		/* Printer on		*/
			fprintf(fp, "Y\r\n");		/* Page bell		*/
			fprintf(fp, "Y\r\n");		/* Caller alarm		*/
			fprintf(fp, "%s\r\n", exitinfo.sUserName);
			fprintf(fp, "%s\r\n", exitinfo.sLocation);
			fprintf(fp, "%s\r\n", exitinfo.sVoicePhone);
			fprintf(fp, "%s\r\n", exitinfo.sDataPhone);
			fprintf(fp, "%s\r\n", exitinfo.Password);
			fprintf(fp, "%d\r\n", exitinfo.Security.level);
			fprintf(fp, "%d\r\n", exitinfo.iTotalCalls);
			fprintf(fp, "%s\r\n", Gdate(exitinfo.tLastLoginDate, Y2Kdoorsys));
			fprintf(fp, "%d\r\n", exitinfo.iTimeLeft * 60);
			fprintf(fp, "%d\r\n", exitinfo.iTimeLeft);
			fprintf(fp, "GR\r\n");		/* ANSI graphics	*/
			fprintf(fp, "%d\r\n", exitinfo.iScreenLen);
			fprintf(fp, "N\r\n");		/* User mode, always N	*/
			fprintf(fp, "\r\n");		/* Always blank		*/
			fprintf(fp, "\r\n");		/* Always blank		*/
			fprintf(fp, "%s\r\n", Rdate(exitinfo.sExpiryDate, Y2Kdoorsys));
			fprintf(fp, "%d\r\n", grecno);	/* Users recordnumber	*/
			fprintf(fp, "%s\r\n", exitinfo.sProtocol);
			fprintf(fp, "%ld\r\n", exitinfo.Uploads);
			fprintf(fp, "%ld\r\n", exitinfo.Downloads);
			fprintf(fp, "%ld\r\n", LIMIT.DownK);
			fprintf(fp, "%ld\r\n", LIMIT.DownK);
			fprintf(fp, "%s\r\n", Rdate(exitinfo.sDateOfBirth, Y2Kdoorsys));
			fprintf(fp, "\r\n");		/* Path to userbase	*/
			fprintf(fp, "\r\n");		/* Path to messagebase	*/
			fprintf(fp, "%s\r\n", CFG.sysop_name);
			fprintf(fp, "%s\r\n", exitinfo.sHandle);
			fprintf(fp, "none\r\n");	/* Next event time	*/
			fprintf(fp, "Y\r\n");		/* Error free connect.	*/
			fprintf(fp, "N\r\n");		/* Always N		*/
			fprintf(fp, "Y\r\n");		/* Always Y		*/
			fprintf(fp, "7\r\n");		/* Default textcolor	*/
			fprintf(fp, "0\r\n");		/* Always 0		*/
			fprintf(fp, "%s\r\n", Gdate(exitinfo.tLastLoginDate, Y2Kdoorsys));
			fprintf(fp, "%s\r\n", StrTimeHM(t_start));
			fprintf(fp, "%s\r\n", LastLoginTime);
			fprintf(fp, "32768\r\n");	/* Always 32768		*/
			fprintf(fp, "%d\r\n", exitinfo.DownloadsToday);
			fprintf(fp, "%ld\r\n", exitinfo.UploadK);
			fprintf(fp, "%ld\r\n", exitinfo.DownloadK);
			fprintf(fp, "%s\r\n", exitinfo.sComment);
			fprintf(fp, "0\r\n");		/* Always 0		*/
			fprintf(fp, "%d\r\n\032", exitinfo.iPosted);
			fclose(fp);
		}
	}

	clear();
	printf("Loading ...\n\n");
	if (NoSuid) 
	    rc = exec_nosuid(Program);
	else
	    rc = execute((char *)"/bin/sh", (char *)"-c", Program, NULL, NULL, NULL);

	Altime(0);
	alarm_off();
	alarm_on();
	Syslog('+', "Door end, rc=%d", rc);

	free(temp1);
	printf("\n\n");
	Pause();
}



/*
 * Execute a door as real user, not suid.
 */
int exec_nosuid(char *mandato)
{
    int	    rc, status;
    pid_t   pid;

    if (mandato == NULL)
	return 1;   /* Prevent running a shell  */

    Syslog('+', "Execve: /bin/sh -c %s", mandato);
    pid = fork();
    if (pid == -1)
	return 1;
    if (pid == 0) {
	char *argv[4];
	argv[0] = (char *)"sh";
	argv[1] = (char *)"-c";
	argv[2] = mandato;
	argv[3] = 0;
	execve("/bin/sh", argv, environ);
	exit(127);
    }
    e_pid = pid;

    do {
	rc = waitpid(pid, &status, 0);
	e_pid = 0;
    } while (((rc > 0) && (rc != pid)) || ((rc == -1) && (errno == EINTR)));

    switch(rc) {
	case -1:
		WriteError("$Waitpid returned %d, status %d,%d", rc,status>>8,status&0xff);
		return -1;
	case 0:
		return 0;
	default:
		if (WIFEXITED(status)) {
		    rc = WEXITSTATUS(status);
		    if (rc) {
			WriteError("Exec_nosuid: returned error %d", rc);
			return rc;
		    }
		}
		if (WIFSIGNALED(status)) {
		    rc = WTERMSIG(status);
		    WriteError("Wait stopped on signal %d", rc);
		    return rc;
		}
		if (rc)
		    WriteError("Wait stopped unknown, rc=%d", rc);
		return rc;      
	}
	return 0;
}