shadow/libmisc/rlogin.c

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/*
* Copyright 1989 - 1994, Julianne Frances Haugh
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Julianne F. Haugh nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY JULIE HAUGH AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL JULIE HAUGH OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <config.h>
#ifdef RLOGIN
#include "rcsid.h"
RCSID("$Id: rlogin.c,v 1.5 1999/08/27 19:02:51 marekm Exp $")
#include "prototypes.h"
#include "defines.h"
#include <stdio.h>
#include <pwd.h>
extern int ruserok();
static struct {
int spd_name;
int spd_baud;
} speed_table [] = {
#ifdef B50
{ B50, 50 },
#endif
#ifdef B75
{ B75, 75 },
#endif
#ifdef B110
{ B110, 110 },
#endif
#ifdef B134
{ B134, 134 },
#endif
#ifdef B150
{ B150, 150 },
#endif
#ifdef B200
{ B200, 200 },
#endif
#ifdef B300
{ B300, 300 },
#endif
#ifdef B600
{ B600, 600 },
#endif
#ifdef B1200
{ B1200, 1200 },
#endif
#ifdef B1800
{ B1800, 1800 },
#endif
#ifdef B2400
{ B2400, 2400 },
#endif
#ifdef B4800
{ B4800, 4800 },
#endif
#ifdef B9600
{ B9600, 9600 },
#endif
#ifdef B19200
{ B19200, 19200 },
#endif
#ifdef B38400
{ B38400, 38400 },
#endif
{ -1, -1 }
};
static void
get_remote_string(char *buf, int size)
{
for (;;) {
if (read (0, buf, 1) != 1)
exit (1);
if (*buf == '\0')
return;
if (--size > 0)
++buf;
}
/*NOTREACHED*/
}
int
do_rlogin(const char *remote_host, char *name, int namelen, char *term, int termlen)
{
struct passwd *pwd;
char remote_name[32];
char *cp;
int remote_speed = 9600;
int speed_name = B9600;
int i;
TERMIO termio;
get_remote_string (remote_name, sizeof remote_name);
get_remote_string (name, namelen);
get_remote_string (term, termlen);
if ((cp = strchr (term, '/'))) {
*cp++ = '\0';
if (! (remote_speed = atoi (cp)))
remote_speed = 9600;
}
for (i = 0;speed_table[i].spd_baud != remote_speed &&
speed_table[i].spd_name != -1;i++)
;
if (speed_table[i].spd_name != -1)
speed_name = speed_table[i].spd_name;
/*
* Put the terminal in cooked mode with echo turned on.
*/
GTTY(0, &termio);
termio.c_iflag |= ICRNL|IXON;
termio.c_oflag |= OPOST|ONLCR;
termio.c_lflag |= ICANON|ECHO|ECHOE;
#ifdef CBAUD
termio.c_cflag = (termio.c_cflag & ~CBAUD) | speed_name;
#else
termio.c_cflag = (termio.c_cflag) | speed_name;
#endif
STTY(0, &termio);
if (! (pwd = getpwnam (name)))
return 0;
/*
* ruserok() returns 0 for success on modern systems, and 1 on
* older ones. If you are having trouble with people logging
* in without giving a required password, THIS is the culprit -
* go fix the #define in config.h.
*/
#ifndef RUSEROK
return 0;
#else
return ruserok (remote_host, pwd->pw_uid == 0,
remote_name, name) == RUSEROK;
#endif
}
#endif /* RLOGIN */