diff options
Diffstat (limited to 'libmisc/rlogin.c')
| -rw-r--r-- | libmisc/rlogin.c | 198 |
1 files changed, 198 insertions, 0 deletions
diff --git a/libmisc/rlogin.c b/libmisc/rlogin.c new file mode 100644 index 0000000..b19f5e8 --- /dev/null +++ b/libmisc/rlogin.c @@ -0,0 +1,198 @@ +/* + * Copyright (c) 1989 - 1994, Julianne Frances Haugh + * Copyright (c) 1996 - 1999, Marek Michałkiewicz + * Copyright (c) 2003 - 2005, Tomasz Kłoczko + * Copyright (c) 2007 - 2008, Nicolas François + * 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. The name of the copyright holders or contributors may not be used to + * endorse or promote products derived from this software without + * specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 THE COPYRIGHT + * HOLDERS 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 + +#ident "$Id$" + +#include "prototypes.h" +#include "defines.h" +#include <stdio.h> +#include <pwd.h> +#include <netdb.h> +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, size_t size) +{ + for (;;) { + if (read (0, buf, 1) != 1) { + exit (EXIT_FAILURE); + } + if ('\0' == *buf) { + return; + } + --size; + if (size > 0) { + ++buf; + } + } + /*NOTREACHED*/} + +int +do_rlogin (const char *remote_host, char *name, size_t namelen, char *term, + size_t termlen) +{ + struct passwd *pwd; + char remote_name[32]; + char *cp; + unsigned long 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); + + cp = strchr (term, '/'); + if (NULL != cp) { + *cp = '\0'; + cp++; + + if (getulong (cp, &remote_speed) == 0) { + remote_speed = 9600; + } + } + for (i = 0; + ( (speed_table[i].spd_baud != remote_speed) + && (speed_table[i].spd_name != -1)); + i++); + + if (-1 != speed_table[i].spd_name) { + 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); + + pwd = getpwnam (name); /* local, no need for xgetpwnam */ + if (NULL == pwd) { + 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 */ + |