768 lines
18 KiB
C
768 lines
18 KiB
C
/* $NetBSD: rlogind.c,v 1.33 2004/07/17 18:32:23 wiz Exp $ */
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/*
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* Copyright (C) 1998 WIDE Project.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by WIDE Project and
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* its contributors.
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* 4. Neither the name of the project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*-
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* Copyright (c) 1983, 1988, 1989, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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__COPYRIGHT("@(#) Copyright (c) 1983, 1988, 1989, 1993\n\
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The Regents of the University of California. All rights reserved.\n");
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#if 0
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static char sccsid[] = "@(#)rlogind.c 8.2 (Berkeley) 4/28/95";
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#else
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__RCSID("$NetBSD: rlogind.c,v 1.33 2004/07/17 18:32:23 wiz Exp $");
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#endif
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#endif /* not lint */
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/*
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* remote login server:
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* \0
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* remuser\0
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* locuser\0
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* terminal_type/speed\0
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* data
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*/
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#include <sys/param.h>
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#include <sys/stat.h>
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#include <sys/ioctl.h>
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#include <signal.h>
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#include <termios.h>
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#include <poll.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <netinet/in_systm.h>
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#include <netinet/ip.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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#include <pwd.h>
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#include <syslog.h>
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#include <errno.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <string.h>
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#include <util.h>
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#include "pathnames.h"
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#ifndef TIOCPKT_WINDOW
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#define TIOCPKT_WINDOW 0x80
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#endif
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#define OPTIONS "alnL"
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char *env[2];
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#define NMAX 30
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char lusername[NMAX+1], rusername[NMAX+1];
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static char term[64] = "TERM=";
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#define ENVSIZE (sizeof("TERM=")-1) /* skip null for concatenation */
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int keepalive = 1;
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int check_all = 0;
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int log_success = 0;
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struct passwd *pwd;
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void doit __P((int, struct sockaddr *));
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int control __P((int, char *, int));
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void protocol __P((int, int));
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void cleanup __P((int));
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void fatal __P((int, char *, int));
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int do_rlogin __P((struct sockaddr *, char *));
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void getstr __P((char *, int, char *));
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void setup_term __P((int));
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#if 0
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int do_krb_login __P((union sockunion *));
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#endif
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void usage __P((void));
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int local_domain __P((char *));
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char *topdomain __P((char *));
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int main __P((int, char *[]));
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extern int __check_rhosts_file;
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extern char *__rcmd_errstr; /* syslog hook from libc/net/rcmd.c */
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extern char **environ;
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int
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main(argc, argv)
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int argc;
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char *argv[];
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{
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struct sockaddr_storage from;
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int ch, fromlen, on;
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openlog("rlogind", LOG_PID, LOG_AUTH);
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opterr = 0;
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while ((ch = getopt(argc, argv, OPTIONS)) != -1)
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switch (ch) {
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case 'a':
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check_all = 1;
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break;
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case 'l':
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__check_rhosts_file = 0;
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break;
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case 'n':
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keepalive = 0;
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break;
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case 'L':
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log_success = 1;
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break;
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case '?':
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default:
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usage();
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break;
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}
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argc -= optind;
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argv += optind;
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fromlen = sizeof (from); /* xxx */
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if (getpeername(0, (struct sockaddr *)&from, &fromlen) < 0) {
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syslog(LOG_ERR,"Can't get peer name of remote host: %m");
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fatal(STDERR_FILENO, "Can't get peer name of remote host", 1);
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}
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#ifdef INET6
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if (((struct sockaddr *)&from)->sa_family == AF_INET6 &&
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IN6_IS_ADDR_V4MAPPED(&((struct sockaddr_in6 *)&from)->sin6_addr) &&
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sizeof(struct sockaddr_in) <= sizeof(from)) {
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struct sockaddr_in sin;
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struct sockaddr_in6 *sin6;
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const int off = sizeof(struct sockaddr_in6) -
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sizeof(struct sockaddr_in);
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sin6 = (struct sockaddr_in6 *)&from;
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memset(&sin, 0, sizeof(sin));
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sin.sin_family = AF_INET;
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sin.sin_len = sizeof(struct sockaddr_in);
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memcpy(&sin.sin_addr, &sin6->sin6_addr.s6_addr[off],
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sizeof(sin.sin_addr));
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memcpy(&from, &sin, sizeof(sin));
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fromlen = sin.sin_len;
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}
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#else
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if (((struct sockaddr *)&from)->sa_family == AF_INET6 &&
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IN6_IS_ADDR_V4MAPPED(&((struct sockaddr_in6 *)&from)->sin6_addr)) {
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char hbuf[NI_MAXHOST];
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if (getnameinfo((struct sockaddr *)&from, fromlen, hbuf,
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sizeof(hbuf), NULL, 0, NI_NUMERICHOST) != 0) {
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strlcpy(hbuf, "invalid", sizeof(hbuf));
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}
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syslog(LOG_ERR, "malformed \"from\" address (v4 mapped, %s)\n",
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hbuf);
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exit(1);
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}
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#endif
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on = 1;
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if (keepalive &&
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setsockopt(0, SOL_SOCKET, SO_KEEPALIVE, &on, sizeof (on)) < 0)
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syslog(LOG_WARNING, "setsockopt (SO_KEEPALIVE): %m");
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#if defined(IP_TOS)
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if (((struct sockaddr *)&from)->sa_family == AF_INET) {
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on = IPTOS_LOWDELAY;
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if (setsockopt(0, IPPROTO_IP, IP_TOS, (char *)&on, sizeof(int)) < 0)
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syslog(LOG_WARNING, "setsockopt (IP_TOS): %m");
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}
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#endif
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doit(0, (struct sockaddr *)&from);
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/* NOTREACHED */
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#ifdef __GNUC__
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exit(0);
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#endif
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}
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int child;
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int netf;
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char line[MAXPATHLEN];
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int confirmed;
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struct winsize win = { 0, 0, 0, 0 };
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void
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doit(f, fromp)
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int f;
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struct sockaddr *fromp;
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{
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int master, pid, on = 1;
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int authenticated = 0;
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char *hostname;
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char hostnamebuf[2 * MAXHOSTNAMELEN + 1];
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char c;
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char naddr[NI_MAXHOST];
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char saddr[NI_MAXHOST];
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char raddr[NI_MAXHOST];
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int af = fromp->sa_family;
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u_int16_t *portp;
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struct addrinfo hints, *res, *res0;
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int gaierror;
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#ifdef NI_WITHSCOPEID
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const int niflags = NI_NUMERICHOST | NI_NUMERICSERV | NI_WITHSCOPEID;
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#else
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const int niflags = NI_NUMERICHOST | NI_NUMERICSERV;
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#endif
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alarm(60);
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read(f, &c, 1);
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if (c != 0)
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exit(1);
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alarm(0);
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switch (af) {
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case AF_INET:
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portp = &((struct sockaddr_in *)fromp)->sin_port;
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break;
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#ifdef INET6
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case AF_INET6:
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portp = &((struct sockaddr_in6 *)fromp)->sin6_port;
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break;
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#endif
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default:
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syslog(LOG_ERR, "malformed \"from\" address (af %d)\n", af);
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exit(1);
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}
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if (getnameinfo((struct sockaddr *)fromp, fromp->sa_len,
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naddr, sizeof(naddr), NULL, 0, niflags) != 0) {
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syslog(LOG_ERR, "malformed \"from\" address (af %d)\n", af);
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exit(1);
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}
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if (getnameinfo((struct sockaddr *)fromp, fromp->sa_len,
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saddr, sizeof(saddr), NULL, 0, NI_NAMEREQD) == 0) {
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/*
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* If name returned by getnameinfo is in our domain,
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* attempt to verify that we haven't been fooled by someone
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* in a remote net; look up the name and check that this
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* address corresponds to the name.
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*/
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hostname = saddr;
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res0 = NULL;
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if (check_all || local_domain(saddr)) {
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strlcpy(hostnamebuf, saddr, sizeof(hostnamebuf));
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memset(&hints, 0, sizeof(hints));
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hints.ai_family = fromp->sa_family;
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hints.ai_socktype = SOCK_STREAM;
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hints.ai_flags = AI_CANONNAME;
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gaierror = getaddrinfo(hostnamebuf, "0", &hints, &res0);
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if (gaierror) {
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syslog(LOG_NOTICE,
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"Couldn't look up address for %s: %s",
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hostnamebuf, gai_strerror(gaierror));
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hostname = naddr;
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} else {
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for (res = res0; res; res = res->ai_next) {
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if (res->ai_family != fromp->sa_family)
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continue;
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if (res->ai_addrlen != fromp->sa_len)
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continue;
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if (getnameinfo(res->ai_addr,
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res->ai_addrlen,
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raddr, sizeof(raddr), NULL, 0,
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niflags) == 0
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&& strcmp(naddr, raddr) == 0) {
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hostname = res->ai_canonname
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? res->ai_canonname
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: saddr;
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break;
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}
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}
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if (res == NULL) {
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syslog(LOG_NOTICE,
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"Host addr %s not listed for host %s",
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naddr, res0->ai_canonname
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? res0->ai_canonname
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: saddr);
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hostname = naddr;
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}
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}
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}
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strlcpy(hostnamebuf, hostname, sizeof(hostnamebuf));
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hostname = hostnamebuf;
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if (res0)
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freeaddrinfo(res0);
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} else {
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strlcpy(hostnamebuf, naddr, sizeof(hostnamebuf));
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hostname = hostnamebuf;
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}
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if (ntohs(*portp) >= IPPORT_RESERVED ||
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ntohs(*portp) < IPPORT_RESERVED/2) {
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syslog(LOG_NOTICE, "Connection from %s on illegal port",
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naddr);
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fatal(f, "Permission denied", 0);
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}
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#ifdef IP_OPTIONS
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if (fromp->sa_family == AF_INET) {
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u_char optbuf[BUFSIZ/3], *cp;
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char lbuf[BUFSIZ], *lp, *ep;
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int optsize = sizeof(optbuf), ipproto;
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struct protoent *ip;
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if ((ip = getprotobyname("ip")) != NULL)
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ipproto = ip->p_proto;
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else
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ipproto = IPPROTO_IP;
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if (getsockopt(0, ipproto, IP_OPTIONS, (char *)optbuf,
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&optsize) == 0 && optsize != 0) {
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lp = lbuf;
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ep = lbuf + sizeof(lbuf);
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for (cp = optbuf; optsize > 0; cp++, optsize--, lp += 3)
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snprintf(lp, ep - lp, " %2.2x", *cp);
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syslog(LOG_NOTICE,
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"Connection received using IP options (ignored):%s",
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lbuf);
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if (setsockopt(0, ipproto, IP_OPTIONS,
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(char *)NULL, optsize) != 0) {
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syslog(LOG_ERR,
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"setsockopt IP_OPTIONS NULL: %m");
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exit(1);
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}
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}
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}
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#endif
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if (do_rlogin(fromp, hostname) == 0)
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authenticated++;
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if (confirmed == 0) {
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write(f, "", 1);
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confirmed = 1; /* we sent the null! */
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}
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netf = f;
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pid = forkpty(&master, line, NULL, &win);
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if (pid < 0) {
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if (errno == ENOENT)
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fatal(f, "Out of ptys", 0);
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else
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fatal(f, "Forkpty", 1);
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}
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if (pid == 0) {
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if (f > 2) /* f should always be 0, but... */
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(void) close(f);
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setup_term(0);
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if (authenticated)
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execl(_PATH_LOGIN, "login", "-p",
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"-h", hostname, "-f", "--", lusername, (char *)0);
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else
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execl(_PATH_LOGIN, "login", "-p",
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"-h", hostname, "--", lusername, (char *)0);
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fatal(STDERR_FILENO, _PATH_LOGIN, 1);
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/*NOTREACHED*/
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}
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ioctl(f, FIONBIO, &on);
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ioctl(master, FIONBIO, &on);
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ioctl(master, TIOCPKT, &on);
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signal(SIGCHLD, cleanup);
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protocol(f, master);
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signal(SIGCHLD, SIG_IGN);
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cleanup(0);
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}
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char magic[2] = { 0377, 0377 };
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char oobdata[] = {TIOCPKT_WINDOW};
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/*
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* Handle a "control" request (signaled by magic being present)
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* in the data stream. For now, we are only willing to handle
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* window size changes.
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*/
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int
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control(pty, cp, n)
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int pty;
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char *cp;
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int n;
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{
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struct winsize w;
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if (n < 4+sizeof (w) || cp[2] != 's' || cp[3] != 's')
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return (0);
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oobdata[0] &= ~TIOCPKT_WINDOW; /* we know he heard */
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memmove(&w, cp+4, sizeof(w));
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w.ws_row = ntohs(w.ws_row);
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w.ws_col = ntohs(w.ws_col);
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w.ws_xpixel = ntohs(w.ws_xpixel);
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w.ws_ypixel = ntohs(w.ws_ypixel);
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(void)ioctl(pty, TIOCSWINSZ, &w);
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return (4+sizeof (w));
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}
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/*
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* rlogin "protocol" machine.
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*/
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void
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protocol(f, p)
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int f, p;
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{
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char pibuf[1024+1], fibuf[1024], *pbp = NULL, *fbp = NULL;
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/* XXX gcc above */
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int pcc = 0, fcc = 0;
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int cc, n;
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char cntl;
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struct pollfd set[2];
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/*
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* Must ignore SIGTTOU, otherwise we'll stop
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* when we try and set slave pty's window shape
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* (our controlling tty is the master pty).
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*/
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(void) signal(SIGTTOU, SIG_IGN);
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send(f, oobdata, 1, MSG_OOB); /* indicate new rlogin */
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set[0].fd = p;
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set[1].fd = f;
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for (;;) {
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set[0].events = POLLPRI;
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set[1].events = 0;
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if (fcc)
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set[0].events |= POLLOUT;
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else
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set[1].events |= POLLIN;
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if (pcc >= 0) {
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if (pcc)
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set[1].events |= POLLOUT;
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else
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set[0].events |= POLLIN;
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}
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if ((n = poll(set, 2, INFTIM)) < 0) {
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if (errno == EINTR)
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continue;
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fatal(f, "poll", 1);
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}
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if (n == 0) {
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/* shouldn't happen... */
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sleep(5);
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continue;
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}
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#define pkcontrol(c) ((c)&(TIOCPKT_FLUSHWRITE|TIOCPKT_NOSTOP|TIOCPKT_DOSTOP))
|
|
if (set[0].revents & POLLPRI) {
|
|
cc = read(p, &cntl, 1);
|
|
if (cc == 1 && pkcontrol(cntl)) {
|
|
cntl |= oobdata[0];
|
|
send(f, &cntl, 1, MSG_OOB);
|
|
if (cntl & TIOCPKT_FLUSHWRITE)
|
|
pcc = 0;
|
|
}
|
|
}
|
|
if (set[1].revents & POLLIN) {
|
|
fcc = read(f, fibuf, sizeof(fibuf));
|
|
if (fcc < 0 && errno == EWOULDBLOCK)
|
|
fcc = 0;
|
|
else {
|
|
char *cp;
|
|
int left, n;
|
|
|
|
if (fcc <= 0)
|
|
break;
|
|
fbp = fibuf;
|
|
|
|
top:
|
|
for (cp = fibuf; cp < fibuf+fcc-1; cp++)
|
|
if (cp[0] == magic[0] &&
|
|
cp[1] == magic[1]) {
|
|
left = fcc - (cp-fibuf);
|
|
n = control(p, cp, left);
|
|
if (n) {
|
|
left -= n;
|
|
if (left > 0)
|
|
memmove(cp,
|
|
cp+n,
|
|
left);
|
|
fcc -= n;
|
|
goto top; /* n^2 */
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (set[0].revents & POLLOUT && fcc > 0) {
|
|
cc = write(p, fbp, fcc);
|
|
if (cc > 0) {
|
|
fcc -= cc;
|
|
fbp += cc;
|
|
}
|
|
}
|
|
|
|
if (set[0].revents & POLLIN) {
|
|
pcc = read(p, pibuf, sizeof (pibuf));
|
|
pbp = pibuf;
|
|
if (pcc < 0 && errno == EWOULDBLOCK)
|
|
pcc = 0;
|
|
else if (pcc <= 0)
|
|
break;
|
|
else if (pibuf[0] == 0) {
|
|
pbp++, pcc--;
|
|
} else {
|
|
if (pkcontrol(pibuf[0])) {
|
|
pibuf[0] |= oobdata[0];
|
|
send(f, &pibuf[0], 1, MSG_OOB);
|
|
}
|
|
pcc = 0;
|
|
}
|
|
}
|
|
if (set[1].revents & POLLOUT && pcc > 0) {
|
|
cc = write(f, pbp, pcc);
|
|
if (cc > 0) {
|
|
pcc -= cc;
|
|
pbp += cc;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
cleanup(signo)
|
|
int signo;
|
|
{
|
|
char *p, c;
|
|
|
|
p = line + sizeof(_PATH_DEV) - 1;
|
|
#ifdef SUPPORT_UTMP
|
|
if (logout(p))
|
|
logwtmp(p, "", "");
|
|
#endif
|
|
#ifdef SUPPORT_UTMPX
|
|
if (logoutx(p, 0, DEAD_PROCESS))
|
|
logwtmpx(p, "", "", 0, DEAD_PROCESS);
|
|
#endif
|
|
(void)chmod(line, 0666);
|
|
(void)chown(line, 0, 0);
|
|
c = *p; *p = 'p';
|
|
(void)chmod(line, 0666);
|
|
(void)chown(line, 0, 0);
|
|
*p = c;
|
|
if (ttyaction(line, "rlogind", "root"))
|
|
syslog(LOG_ERR, "%s: ttyaction failed", line);
|
|
shutdown(netf, 2);
|
|
exit(1);
|
|
}
|
|
|
|
void
|
|
fatal(f, msg, syserr)
|
|
int f;
|
|
char *msg;
|
|
int syserr;
|
|
{
|
|
int len;
|
|
char buf[BUFSIZ], *bp, *ep;
|
|
|
|
bp = buf;
|
|
ep = buf + sizeof(buf);
|
|
|
|
/*
|
|
* Prepend binary one to message if we haven't sent
|
|
* the magic null as confirmation.
|
|
*/
|
|
if (!confirmed)
|
|
*bp++ = '\001'; /* error indicator */
|
|
if (syserr)
|
|
len = snprintf(bp, ep - bp, "rlogind: %s: %s.\r\n",
|
|
msg, strerror(errno));
|
|
else
|
|
len = snprintf(bp, ep - bp, "rlogind: %s.\r\n", msg);
|
|
(void) write(f, buf, bp + len - buf);
|
|
exit(1);
|
|
}
|
|
|
|
int
|
|
do_rlogin(dest, host)
|
|
struct sockaddr *dest;
|
|
char *host;
|
|
{
|
|
int retval;
|
|
|
|
getstr(rusername, sizeof(rusername), "remuser too long");
|
|
getstr(lusername, sizeof(lusername), "locuser too long");
|
|
getstr(term+ENVSIZE, sizeof(term)-ENVSIZE, "Terminal type too long");
|
|
|
|
pwd = getpwnam(lusername);
|
|
if (pwd == NULL) {
|
|
syslog(LOG_INFO,
|
|
"%s@%s as %s: unknown login.", rusername, host, lusername);
|
|
return (-1);
|
|
}
|
|
|
|
retval = iruserok_sa(dest, dest->sa_len, pwd->pw_uid == 0, rusername,
|
|
lusername);
|
|
/* XXX put inet_ntoa(dest->sin_addr.s_addr) into all messages below */
|
|
if (retval == 0) {
|
|
if (log_success)
|
|
syslog(LOG_INFO, "%s@%s as %s: iruserok succeeded",
|
|
rusername, host, lusername);
|
|
} else {
|
|
if (__rcmd_errstr)
|
|
syslog(LOG_INFO, "%s@%s as %s: iruserok failed (%s)",
|
|
rusername, host, lusername, __rcmd_errstr);
|
|
else
|
|
syslog(LOG_INFO, "%s@%s as %s: iruserok failed",
|
|
rusername, host, lusername);
|
|
}
|
|
return(retval);
|
|
}
|
|
|
|
void
|
|
getstr(buf, cnt, errmsg)
|
|
char *buf;
|
|
int cnt;
|
|
char *errmsg;
|
|
{
|
|
char c;
|
|
|
|
do {
|
|
if (read(0, &c, 1) != 1)
|
|
exit(1);
|
|
if (--cnt < 0)
|
|
fatal(STDOUT_FILENO, errmsg, 0);
|
|
*buf++ = c;
|
|
} while (c != 0);
|
|
}
|
|
|
|
|
|
void
|
|
setup_term(fd)
|
|
int fd;
|
|
{
|
|
char *cp = index(term+ENVSIZE, '/');
|
|
char *speed;
|
|
struct termios tt;
|
|
|
|
#ifndef notyet
|
|
tcgetattr(fd, &tt);
|
|
if (cp) {
|
|
*cp++ = '\0';
|
|
speed = cp;
|
|
cp = index(speed, '/');
|
|
if (cp)
|
|
*cp++ = '\0';
|
|
cfsetspeed(&tt, atoi(speed));
|
|
}
|
|
|
|
tt.c_iflag = TTYDEF_IFLAG;
|
|
tt.c_oflag = TTYDEF_OFLAG;
|
|
tt.c_lflag = TTYDEF_LFLAG;
|
|
tcsetattr(fd, TCSAFLUSH, &tt);
|
|
#else
|
|
if (cp) {
|
|
*cp++ = '\0';
|
|
speed = cp;
|
|
cp = index(speed, '/');
|
|
if (cp)
|
|
*cp++ = '\0';
|
|
tcgetattr(fd, &tt);
|
|
cfsetspeed(&tt, atoi(speed));
|
|
tcsetattr(fd, TCSAFLUSH, &tt);
|
|
}
|
|
#endif
|
|
|
|
env[0] = term;
|
|
env[1] = 0;
|
|
environ = env;
|
|
}
|
|
|
|
|
|
void
|
|
usage()
|
|
{
|
|
syslog(LOG_ERR, "usage: rlogind [-alnL]");
|
|
}
|
|
|
|
/*
|
|
* Check whether host h is in our local domain,
|
|
* defined as sharing the last two components of the domain part,
|
|
* or the entire domain part if the local domain has only one component.
|
|
* If either name is unqualified (contains no '.'),
|
|
* assume that the host is local, as it will be
|
|
* interpreted as such.
|
|
*/
|
|
int
|
|
local_domain(h)
|
|
char *h;
|
|
{
|
|
char localhost[MAXHOSTNAMELEN + 1];
|
|
char *p1, *p2;
|
|
|
|
localhost[0] = 0;
|
|
(void) gethostname(localhost, sizeof(localhost));
|
|
localhost[sizeof(localhost) - 1] = '\0';
|
|
p1 = topdomain(localhost);
|
|
p2 = topdomain(h);
|
|
if (p1 == NULL || p2 == NULL || !strcasecmp(p1, p2))
|
|
return (1);
|
|
return (0);
|
|
}
|
|
|
|
char *
|
|
topdomain(h)
|
|
char *h;
|
|
{
|
|
char *p;
|
|
char *maybe = NULL;
|
|
int dots = 0;
|
|
|
|
for (p = h + strlen(h); p >= h; p--) {
|
|
if (*p == '.') {
|
|
if (++dots == 2)
|
|
return (p);
|
|
maybe = p;
|
|
}
|
|
}
|
|
return (maybe);
|
|
}
|