rlogind.c revision 81972
11592Srgrimes/*- 21592Srgrimes * Copyright (c) 1983, 1988, 1989, 1993 31592Srgrimes * The Regents of the University of California. All rights reserved. 41592Srgrimes * 51592Srgrimes * Redistribution and use in source and binary forms, with or without 61592Srgrimes * modification, are permitted provided that the following conditions 71592Srgrimes * are met: 81592Srgrimes * 1. Redistributions of source code must retain the above copyright 91592Srgrimes * notice, this list of conditions and the following disclaimer. 101592Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 111592Srgrimes * notice, this list of conditions and the following disclaimer in the 121592Srgrimes * documentation and/or other materials provided with the distribution. 131592Srgrimes * 3. All advertising materials mentioning features or use of this software 141592Srgrimes * must display the following acknowledgement: 151592Srgrimes * This product includes software developed by the University of 161592Srgrimes * California, Berkeley and its contributors. 171592Srgrimes * 4. Neither the name of the University nor the names of its contributors 181592Srgrimes * may be used to endorse or promote products derived from this software 191592Srgrimes * without specific prior written permission. 201592Srgrimes * 211592Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 221592Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 231592Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 241592Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 251592Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 261592Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 271592Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 281592Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 291592Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 301592Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 311592Srgrimes * SUCH DAMAGE. 321592Srgrimes */ 331592Srgrimes 341592Srgrimes#ifndef lint 3529916Smarkmstatic const char copyright[] = 361592Srgrimes"@(#) Copyright (c) 1983, 1988, 1989, 1993\n\ 371592Srgrimes The Regents of the University of California. All rights reserved.\n"; 381592Srgrimes#endif /* not lint */ 391592Srgrimes 401592Srgrimes#ifndef lint 4131405Scharnier#if 0 4229916Smarkmstatic const char sccsid[] = "@(#)rlogind.c 8.1 (Berkeley) 6/4/93"; 4331405Scharnier#endif 4431405Scharnierstatic const char rcsid[] = 4550476Speter "$FreeBSD: head/libexec/rlogind/rlogind.c 81972 2001-08-20 12:50:21Z brian $"; 461592Srgrimes#endif /* not lint */ 471592Srgrimes 481592Srgrimes/* 491592Srgrimes * remote login server: 501592Srgrimes * \0 511592Srgrimes * remuser\0 521592Srgrimes * locuser\0 531592Srgrimes * terminal_type/speed\0 541592Srgrimes * data 551592Srgrimes */ 561592Srgrimes 571592Srgrimes#define FD_SETSIZE 16 /* don't need many bits for select */ 5829916Smarkm#include <sys/types.h> 591592Srgrimes#include <sys/param.h> 601592Srgrimes#include <sys/stat.h> 611592Srgrimes#include <sys/ioctl.h> 621592Srgrimes#include <signal.h> 631592Srgrimes#include <termios.h> 641592Srgrimes 651592Srgrimes#include <sys/socket.h> 661592Srgrimes#include <netinet/in.h> 671592Srgrimes#include <netinet/in_systm.h> 681592Srgrimes#include <netinet/ip.h> 6911486Sdg#include <netinet/tcp.h> 701592Srgrimes#include <arpa/inet.h> 711592Srgrimes#include <netdb.h> 721592Srgrimes 7331405Scharnier#include <errno.h> 7431405Scharnier#include <libutil.h> 751592Srgrimes#include <pwd.h> 761592Srgrimes#include <syslog.h> 771592Srgrimes#include <stdio.h> 781592Srgrimes#include <stdlib.h> 791592Srgrimes#include <string.h> 8031405Scharnier#include <unistd.h> 811592Srgrimes#include "pathnames.h" 821592Srgrimes 8351433Smarkm 841592Srgrimes#ifndef TIOCPKT_WINDOW 851592Srgrimes#define TIOCPKT_WINDOW 0x80 861592Srgrimes#endif 871592Srgrimes 8851433Smarkm#define ARGSTR "Dalnx" 891592Srgrimes 9056590Sshin/* wrapper for KAME-special getnameinfo() */ 9156590Sshin#ifndef NI_WITHSCOPEID 9256590Sshin#define NI_WITHSCOPEID 0 9356590Sshin#endif 9456590Sshin 951592Srgrimeschar *env[2]; 961592Srgrimes#define NMAX 30 971592Srgrimeschar lusername[NMAX+1], rusername[NMAX+1]; 981592Srgrimesstatic char term[64] = "TERM="; 991592Srgrimes#define ENVSIZE (sizeof("TERM=")-1) /* skip null for concatenation */ 1001592Srgrimesint keepalive = 1; 1011592Srgrimesint check_all = 0; 10211486Sdgint no_delay; 1031592Srgrimes 1041592Srgrimesstruct passwd *pwd; 1051592Srgrimes 10656590Sshinunion sockunion { 10756590Sshin struct sockinet { 10856590Sshin u_char si_len; 10956590Sshin u_char si_family; 11056590Sshin u_short si_port; 11156590Sshin } su_si; 11256590Sshin struct sockaddr_in su_sin; 11356590Sshin struct sockaddr_in6 su_sin6; 11456590Sshin}; 11556590Sshin#define su_len su_si.si_len 11656590Sshin#define su_family su_si.si_family 11756590Sshin#define su_port su_si.si_port 11856590Sshin 11956590Sshinvoid doit __P((int, union sockunion *)); 1201592Srgrimesint control __P((int, char *, int)); 1211592Srgrimesvoid protocol __P((int, int)); 1221592Srgrimesvoid cleanup __P((int)); 1231592Srgrimesvoid fatal __P((int, char *, int)); 12456590Sshinint do_rlogin __P((union sockunion *)); 1251592Srgrimesvoid getstr __P((char *, int, char *)); 1261592Srgrimesvoid setup_term __P((int)); 1271592Srgrimesint do_krb_login __P((struct sockaddr_in *)); 1281592Srgrimesvoid usage __P((void)); 1291592Srgrimes 13051433Smarkm 1311592Srgrimesint 1321592Srgrimesmain(argc, argv) 1331592Srgrimes int argc; 1341592Srgrimes char *argv[]; 1351592Srgrimes{ 1361592Srgrimes extern int __check_rhosts_file; 13756590Sshin union sockunion from; 1381592Srgrimes int ch, fromlen, on; 1391592Srgrimes 1401592Srgrimes openlog("rlogind", LOG_PID | LOG_CONS, LOG_AUTH); 1411592Srgrimes 1421592Srgrimes opterr = 0; 14324349Simp while ((ch = getopt(argc, argv, ARGSTR)) != -1) 1441592Srgrimes switch (ch) { 14511486Sdg case 'D': 14611486Sdg no_delay = 1; 14711486Sdg break; 1481592Srgrimes case 'a': 1491592Srgrimes check_all = 1; 1501592Srgrimes break; 1511592Srgrimes case 'l': 1521592Srgrimes __check_rhosts_file = 0; 1531592Srgrimes break; 1541592Srgrimes case 'n': 1551592Srgrimes keepalive = 0; 1561592Srgrimes break; 1571592Srgrimes#ifdef CRYPT 1581592Srgrimes case 'x': 1591592Srgrimes doencrypt = 1; 1601592Srgrimes break; 1611592Srgrimes#endif 1621592Srgrimes case '?': 1631592Srgrimes default: 1641592Srgrimes usage(); 1651592Srgrimes break; 1661592Srgrimes } 1671592Srgrimes argc -= optind; 1681592Srgrimes argv += optind; 1691592Srgrimes 1701592Srgrimes fromlen = sizeof (from); 1711592Srgrimes if (getpeername(0, (struct sockaddr *)&from, &fromlen) < 0) { 1721592Srgrimes syslog(LOG_ERR,"Can't get peer name of remote host: %m"); 1731592Srgrimes fatal(STDERR_FILENO, "Can't get peer name of remote host", 1); 1741592Srgrimes } 1751592Srgrimes on = 1; 1761592Srgrimes if (keepalive && 1771592Srgrimes setsockopt(0, SOL_SOCKET, SO_KEEPALIVE, &on, sizeof (on)) < 0) 1781592Srgrimes syslog(LOG_WARNING, "setsockopt (SO_KEEPALIVE): %m"); 17911486Sdg if (no_delay && 18011486Sdg setsockopt(0, IPPROTO_TCP, TCP_NODELAY, &on, sizeof(on)) < 0) 18111486Sdg syslog(LOG_WARNING, "setsockopt (TCP_NODELAY): %m"); 18256590Sshin if (from.su_family == AF_INET) 18356590Sshin { 1841592Srgrimes on = IPTOS_LOWDELAY; 1851592Srgrimes if (setsockopt(0, IPPROTO_IP, IP_TOS, (char *)&on, sizeof(int)) < 0) 1861592Srgrimes syslog(LOG_WARNING, "setsockopt (IP_TOS): %m"); 18756590Sshin } 18811486Sdg 1891592Srgrimes doit(0, &from); 19029916Smarkm return 0; 1911592Srgrimes} 1921592Srgrimes 1931592Srgrimesint child; 1941592Srgrimesint netf; 1951592Srgrimeschar line[MAXPATHLEN]; 1961592Srgrimesint confirmed; 1971592Srgrimes 1981592Srgrimesstruct winsize win = { 0, 0, 0, 0 }; 1991592Srgrimes 2001592Srgrimes 2011592Srgrimesvoid 2021592Srgrimesdoit(f, fromp) 2031592Srgrimes int f; 20456590Sshin union sockunion *fromp; 2051592Srgrimes{ 2061592Srgrimes int master, pid, on = 1; 2071592Srgrimes int authenticated = 0; 20856590Sshin char hostname[2 * MAXHOSTNAMELEN + 1]; 20956590Sshin char nameinfo[2 * INET6_ADDRSTRLEN + 1]; 2101592Srgrimes char c; 2111592Srgrimes 2121592Srgrimes alarm(60); 2131592Srgrimes read(f, &c, 1); 2141592Srgrimes 2151592Srgrimes if (c != 0) 2161592Srgrimes exit(1); 2171592Srgrimes 2181592Srgrimes alarm(0); 21956590Sshin 22056590Sshin realhostname_sa(hostname, sizeof(hostname) - 1, 22156590Sshin (struct sockaddr *)fromp, fromp->su_len); 22256590Sshin /* error check ? */ 22356590Sshin fromp->su_port = ntohs((u_short)fromp->su_port); 22424191Simp hostname[sizeof(hostname) - 1] = '\0'; 2251592Srgrimes 2261592Srgrimes { 22763959Sume if ((fromp->su_family != AF_INET 22856590Sshin#ifdef INET6 22963959Sume && fromp->su_family != AF_INET6 23056590Sshin#endif 23156590Sshin ) || 23256590Sshin fromp->su_port >= IPPORT_RESERVED || 23356590Sshin fromp->su_port < IPPORT_RESERVED/2) { 23456590Sshin getnameinfo((struct sockaddr *)fromp, 23556590Sshin fromp->su_len, 23656590Sshin nameinfo, sizeof(nameinfo), NULL, 0, 23756590Sshin NI_NUMERICHOST|NI_WITHSCOPEID); 23856590Sshin /* error check ? */ 2391592Srgrimes syslog(LOG_NOTICE, "Connection from %s on illegal port", 24056590Sshin nameinfo); 2411592Srgrimes fatal(f, "Permission denied", 0); 2421592Srgrimes } 2431592Srgrimes#ifdef IP_OPTIONS 24456590Sshin if (fromp->su_family == AF_INET) 24556590Sshin { 24622455Simp u_char optbuf[BUFSIZ/3]; 24722455Simp int optsize = sizeof(optbuf), ipproto, i; 2481592Srgrimes struct protoent *ip; 2491592Srgrimes 2501592Srgrimes if ((ip = getprotobyname("ip")) != NULL) 2511592Srgrimes ipproto = ip->p_proto; 2521592Srgrimes else 2531592Srgrimes ipproto = IPPROTO_IP; 2541592Srgrimes if (getsockopt(0, ipproto, IP_OPTIONS, (char *)optbuf, 2551592Srgrimes &optsize) == 0 && optsize != 0) { 25622455Simp for (i = 0; i < optsize; ) { 25722455Simp u_char c = optbuf[i]; 25822455Simp if (c == IPOPT_LSRR || c == IPOPT_SSRR) { 25922455Simp syslog(LOG_NOTICE, 26022455Simp "Connection refused from %s with IP option %s", 26156590Sshin inet_ntoa(fromp->su_sin.sin_addr), 26222455Simp c == IPOPT_LSRR ? "LSRR" : "SSRR"); 26322455Simp exit(1); 26422455Simp } 26522455Simp if (c == IPOPT_EOL) 26622455Simp break; 26722455Simp i += (c == IPOPT_NOP) ? 1 : optbuf[i+1]; 2681592Srgrimes } 2691592Srgrimes } 27056590Sshin } 2711592Srgrimes#endif 2721592Srgrimes if (do_rlogin(fromp) == 0) 2731592Srgrimes authenticated++; 2741592Srgrimes } 2751592Srgrimes if (confirmed == 0) { 2761592Srgrimes write(f, "", 1); 2771592Srgrimes confirmed = 1; /* we sent the null! */ 2781592Srgrimes } 2791592Srgrimes#ifdef CRYPT 2801592Srgrimes if (doencrypt) 28129916Smarkm (void) des_enc_write(f, 28229916Smarkm SECURE_MESSAGE, 28329916Smarkm strlen(SECURE_MESSAGE), 28429916Smarkm schedule, &kdata->session); 2851592Srgrimes#endif 2861592Srgrimes netf = f; 2871592Srgrimes 2881592Srgrimes pid = forkpty(&master, line, NULL, &win); 2891592Srgrimes if (pid < 0) { 2901592Srgrimes if (errno == ENOENT) 2911592Srgrimes fatal(f, "Out of ptys", 0); 2921592Srgrimes else 2931592Srgrimes fatal(f, "Forkpty", 1); 2941592Srgrimes } 2951592Srgrimes if (pid == 0) { 2961592Srgrimes if (f > 2) /* f should always be 0, but... */ 2971592Srgrimes (void) close(f); 2981592Srgrimes setup_term(0); 29912575Snate if (*lusername=='-') { 3002076Sguido syslog(LOG_ERR, "tried to pass user \"%s\" to login", 3012076Sguido lusername); 3022076Sguido fatal(STDERR_FILENO, "invalid user", 0); 3032076Sguido } 3041592Srgrimes if (authenticated) { 3051592Srgrimes execl(_PATH_LOGIN, "login", "-p", 3061592Srgrimes "-h", hostname, "-f", lusername, (char *)NULL); 3071592Srgrimes } else 3081592Srgrimes execl(_PATH_LOGIN, "login", "-p", 3091592Srgrimes "-h", hostname, lusername, (char *)NULL); 3101592Srgrimes fatal(STDERR_FILENO, _PATH_LOGIN, 1); 3111592Srgrimes /*NOTREACHED*/ 3121592Srgrimes } 3131592Srgrimes#ifdef CRYPT 3141592Srgrimes /* 3151592Srgrimes * If encrypted, don't turn on NBIO or the des read/write 3161592Srgrimes * routines will croak. 3171592Srgrimes */ 3181592Srgrimes 3191592Srgrimes if (!doencrypt) 3201592Srgrimes#endif 3211592Srgrimes ioctl(f, FIONBIO, &on); 3221592Srgrimes ioctl(master, FIONBIO, &on); 3231592Srgrimes ioctl(master, TIOCPKT, &on); 3241592Srgrimes signal(SIGCHLD, cleanup); 3251592Srgrimes protocol(f, master); 3261592Srgrimes signal(SIGCHLD, SIG_IGN); 3271592Srgrimes cleanup(0); 3281592Srgrimes} 3291592Srgrimes 3301592Srgrimeschar magic[2] = { 0377, 0377 }; 3311592Srgrimeschar oobdata[] = {TIOCPKT_WINDOW}; 3321592Srgrimes 3331592Srgrimes/* 3341592Srgrimes * Handle a "control" request (signaled by magic being present) 3351592Srgrimes * in the data stream. For now, we are only willing to handle 3361592Srgrimes * window size changes. 3371592Srgrimes */ 3381592Srgrimesint 3391592Srgrimescontrol(pty, cp, n) 3401592Srgrimes int pty; 3411592Srgrimes char *cp; 3421592Srgrimes int n; 3431592Srgrimes{ 3441592Srgrimes struct winsize w; 3451592Srgrimes 3461592Srgrimes if (n < 4+sizeof (w) || cp[2] != 's' || cp[3] != 's') 3471592Srgrimes return (0); 3481592Srgrimes oobdata[0] &= ~TIOCPKT_WINDOW; /* we know he heard */ 3491592Srgrimes bcopy(cp+4, (char *)&w, sizeof(w)); 3501592Srgrimes w.ws_row = ntohs(w.ws_row); 3511592Srgrimes w.ws_col = ntohs(w.ws_col); 3521592Srgrimes w.ws_xpixel = ntohs(w.ws_xpixel); 3531592Srgrimes w.ws_ypixel = ntohs(w.ws_ypixel); 3541592Srgrimes (void)ioctl(pty, TIOCSWINSZ, &w); 3551592Srgrimes return (4+sizeof (w)); 3561592Srgrimes} 3571592Srgrimes 3581592Srgrimes/* 3591592Srgrimes * rlogin "protocol" machine. 3601592Srgrimes */ 3611592Srgrimesvoid 3621592Srgrimesprotocol(f, p) 3631592Srgrimes register int f, p; 3641592Srgrimes{ 36569705Sru char pibuf[1024+1], fibuf[1024], *pbp = NULL, *fbp = NULL; 36646078Simp int pcc = 0, fcc = 0; 3671592Srgrimes int cc, nfd, n; 3681592Srgrimes char cntl; 3691592Srgrimes 3701592Srgrimes /* 3711592Srgrimes * Must ignore SIGTTOU, otherwise we'll stop 3721592Srgrimes * when we try and set slave pty's window shape 3731592Srgrimes * (our controlling tty is the master pty). 3741592Srgrimes */ 3751592Srgrimes (void) signal(SIGTTOU, SIG_IGN); 3761592Srgrimes send(f, oobdata, 1, MSG_OOB); /* indicate new rlogin */ 3771592Srgrimes if (f > p) 3781592Srgrimes nfd = f + 1; 3791592Srgrimes else 3801592Srgrimes nfd = p + 1; 3811592Srgrimes if (nfd > FD_SETSIZE) { 3821592Srgrimes syslog(LOG_ERR, "select mask too small, increase FD_SETSIZE"); 3831592Srgrimes fatal(f, "internal error (select mask too small)", 0); 3841592Srgrimes } 3851592Srgrimes for (;;) { 3861592Srgrimes fd_set ibits, obits, ebits, *omask; 3871592Srgrimes 3881592Srgrimes FD_ZERO(&ebits); 3891592Srgrimes FD_ZERO(&ibits); 3901592Srgrimes FD_ZERO(&obits); 3911592Srgrimes omask = (fd_set *)NULL; 3921592Srgrimes if (fcc) { 3931592Srgrimes FD_SET(p, &obits); 3941592Srgrimes omask = &obits; 3951592Srgrimes } else 3961592Srgrimes FD_SET(f, &ibits); 39746078Simp if (pcc >= 0) { 3981592Srgrimes if (pcc) { 3991592Srgrimes FD_SET(f, &obits); 4001592Srgrimes omask = &obits; 4011592Srgrimes } else 4021592Srgrimes FD_SET(p, &ibits); 40346078Simp } 4041592Srgrimes FD_SET(p, &ebits); 4051592Srgrimes if ((n = select(nfd, &ibits, omask, &ebits, 0)) < 0) { 4061592Srgrimes if (errno == EINTR) 4071592Srgrimes continue; 4081592Srgrimes fatal(f, "select", 1); 4091592Srgrimes } 4101592Srgrimes if (n == 0) { 4111592Srgrimes /* shouldn't happen... */ 4121592Srgrimes sleep(5); 4131592Srgrimes continue; 4141592Srgrimes } 4151592Srgrimes#define pkcontrol(c) ((c)&(TIOCPKT_FLUSHWRITE|TIOCPKT_NOSTOP|TIOCPKT_DOSTOP)) 4161592Srgrimes if (FD_ISSET(p, &ebits)) { 4171592Srgrimes cc = read(p, &cntl, 1); 4181592Srgrimes if (cc == 1 && pkcontrol(cntl)) { 4191592Srgrimes cntl |= oobdata[0]; 4201592Srgrimes send(f, &cntl, 1, MSG_OOB); 4211592Srgrimes if (cntl & TIOCPKT_FLUSHWRITE) { 4221592Srgrimes pcc = 0; 4231592Srgrimes FD_CLR(p, &ibits); 4241592Srgrimes } 4251592Srgrimes } 4261592Srgrimes } 4271592Srgrimes if (FD_ISSET(f, &ibits)) { 4281592Srgrimes#ifdef CRYPT 4291592Srgrimes if (doencrypt) 43029916Smarkm fcc = des_enc_read(f, fibuf, sizeof(fibuf), 43129916Smarkm schedule, &kdata->session); 4321592Srgrimes else 4331592Srgrimes#endif 4341592Srgrimes fcc = read(f, fibuf, sizeof(fibuf)); 4351592Srgrimes if (fcc < 0 && errno == EWOULDBLOCK) 4361592Srgrimes fcc = 0; 4371592Srgrimes else { 4381592Srgrimes register char *cp; 4391592Srgrimes int left, n; 4401592Srgrimes 4411592Srgrimes if (fcc <= 0) 4421592Srgrimes break; 4431592Srgrimes fbp = fibuf; 4441592Srgrimes 4451592Srgrimes top: 4461592Srgrimes for (cp = fibuf; cp < fibuf+fcc-1; cp++) 4471592Srgrimes if (cp[0] == magic[0] && 4481592Srgrimes cp[1] == magic[1]) { 4491592Srgrimes left = fcc - (cp-fibuf); 4501592Srgrimes n = control(p, cp, left); 4511592Srgrimes if (n) { 4521592Srgrimes left -= n; 4531592Srgrimes if (left > 0) 4541592Srgrimes bcopy(cp+n, cp, left); 4551592Srgrimes fcc -= n; 4561592Srgrimes goto top; /* n^2 */ 4571592Srgrimes } 4581592Srgrimes } 4591592Srgrimes FD_SET(p, &obits); /* try write */ 4601592Srgrimes } 4611592Srgrimes } 4621592Srgrimes 4631592Srgrimes if (FD_ISSET(p, &obits) && fcc > 0) { 4641592Srgrimes cc = write(p, fbp, fcc); 4651592Srgrimes if (cc > 0) { 4661592Srgrimes fcc -= cc; 4671592Srgrimes fbp += cc; 4681592Srgrimes } 4691592Srgrimes } 4701592Srgrimes 4711592Srgrimes if (FD_ISSET(p, &ibits)) { 4721592Srgrimes pcc = read(p, pibuf, sizeof (pibuf)); 4731592Srgrimes pbp = pibuf; 4741592Srgrimes if (pcc < 0 && errno == EWOULDBLOCK) 4751592Srgrimes pcc = 0; 4761592Srgrimes else if (pcc <= 0) 4771592Srgrimes break; 4781592Srgrimes else if (pibuf[0] == 0) { 4791592Srgrimes pbp++, pcc--; 4801592Srgrimes#ifdef CRYPT 4811592Srgrimes if (!doencrypt) 4821592Srgrimes#endif 4831592Srgrimes FD_SET(f, &obits); /* try write */ 4841592Srgrimes } else { 4851592Srgrimes if (pkcontrol(pibuf[0])) { 4861592Srgrimes pibuf[0] |= oobdata[0]; 4871592Srgrimes send(f, &pibuf[0], 1, MSG_OOB); 4881592Srgrimes } 4891592Srgrimes pcc = 0; 4901592Srgrimes } 4911592Srgrimes } 4921592Srgrimes if ((FD_ISSET(f, &obits)) && pcc > 0) { 4931592Srgrimes#ifdef CRYPT 4941592Srgrimes if (doencrypt) 49529916Smarkm cc = des_enc_write(f, pbp, pcc, 49629916Smarkm schedule, &kdata->session); 4971592Srgrimes else 4981592Srgrimes#endif 4991592Srgrimes cc = write(f, pbp, pcc); 5001592Srgrimes if (cc < 0 && errno == EWOULDBLOCK) { 5011592Srgrimes /* 5021592Srgrimes * This happens when we try write after read 5031592Srgrimes * from p, but some old kernels balk at large 5041592Srgrimes * writes even when select returns true. 5051592Srgrimes */ 5061592Srgrimes if (!FD_ISSET(p, &ibits)) 5071592Srgrimes sleep(5); 5081592Srgrimes continue; 5091592Srgrimes } 5101592Srgrimes if (cc > 0) { 5111592Srgrimes pcc -= cc; 5121592Srgrimes pbp += cc; 5131592Srgrimes } 5141592Srgrimes } 5151592Srgrimes } 5161592Srgrimes} 5171592Srgrimes 5181592Srgrimesvoid 5191592Srgrimescleanup(signo) 5201592Srgrimes int signo; 5211592Srgrimes{ 5221592Srgrimes char *p; 5231592Srgrimes 5241592Srgrimes p = line + sizeof(_PATH_DEV) - 1; 5251592Srgrimes if (logout(p)) 5261592Srgrimes logwtmp(p, "", ""); 52750132Simp (void)chflags(line, 0); 5281592Srgrimes (void)chmod(line, 0666); 5291592Srgrimes (void)chown(line, 0, 0); 5301592Srgrimes *p = 'p'; 53150132Simp (void)chflags(line, 0); 5321592Srgrimes (void)chmod(line, 0666); 5331592Srgrimes (void)chown(line, 0, 0); 5341592Srgrimes shutdown(netf, 2); 5351592Srgrimes exit(1); 5361592Srgrimes} 5371592Srgrimes 5381592Srgrimesvoid 5391592Srgrimesfatal(f, msg, syserr) 5401592Srgrimes int f; 5411592Srgrimes char *msg; 5421592Srgrimes int syserr; 5431592Srgrimes{ 5441592Srgrimes int len; 5451592Srgrimes char buf[BUFSIZ], *bp = buf; 5461592Srgrimes 5471592Srgrimes /* 5481592Srgrimes * Prepend binary one to message if we haven't sent 5491592Srgrimes * the magic null as confirmation. 5501592Srgrimes */ 5511592Srgrimes if (!confirmed) 5521592Srgrimes *bp++ = '\01'; /* error indicator */ 5531592Srgrimes if (syserr) 55464238Skris len = snprintf(bp, sizeof(buf), "rlogind: %s: %s.\r\n", 5551592Srgrimes msg, strerror(errno)); 5561592Srgrimes else 55764238Skris len = snprintf(bp, sizeof(buf), "rlogind: %s.\r\n", msg); 55881972Sbrian if (len == -1) 55981972Sbrian len = 0; 5601592Srgrimes (void) write(f, buf, bp + len - buf); 5611592Srgrimes exit(1); 5621592Srgrimes} 5631592Srgrimes 5641592Srgrimesint 5651592Srgrimesdo_rlogin(dest) 56656590Sshin union sockunion *dest; 5671592Srgrimes{ 56866755Sru 5691592Srgrimes getstr(rusername, sizeof(rusername), "remuser too long"); 5701592Srgrimes getstr(lusername, sizeof(lusername), "locuser too long"); 5711592Srgrimes getstr(term+ENVSIZE, sizeof(term)-ENVSIZE, "Terminal type too long"); 5721592Srgrimes 5731592Srgrimes pwd = getpwnam(lusername); 5741592Srgrimes if (pwd == NULL) 5751592Srgrimes return (-1); 5761592Srgrimes /* XXX why don't we syslog() failure? */ 57756590Sshin 57856939Sshin return (iruserok_sa(dest, dest->su_len, pwd->pw_uid == 0, rusername, 57956939Sshin lusername)); 5801592Srgrimes} 5811592Srgrimes 5821592Srgrimesvoid 5831592Srgrimesgetstr(buf, cnt, errmsg) 5841592Srgrimes char *buf; 5851592Srgrimes int cnt; 5861592Srgrimes char *errmsg; 5871592Srgrimes{ 5881592Srgrimes char c; 5891592Srgrimes 5901592Srgrimes do { 59180381Ssheldonh if (read(STDIN_FILENO, &c, 1) != 1) 5921592Srgrimes exit(1); 5931592Srgrimes if (--cnt < 0) 5941592Srgrimes fatal(STDOUT_FILENO, errmsg, 0); 5951592Srgrimes *buf++ = c; 5961592Srgrimes } while (c != 0); 5971592Srgrimes} 5981592Srgrimes 5991592Srgrimesextern char **environ; 6001592Srgrimes 6011592Srgrimesvoid 6021592Srgrimessetup_term(fd) 6031592Srgrimes int fd; 6041592Srgrimes{ 6051592Srgrimes register char *cp = index(term+ENVSIZE, '/'); 6061592Srgrimes char *speed; 6071592Srgrimes struct termios tt; 6081592Srgrimes 6091592Srgrimes#ifndef notyet 6101592Srgrimes tcgetattr(fd, &tt); 6111592Srgrimes if (cp) { 6121592Srgrimes *cp++ = '\0'; 6131592Srgrimes speed = cp; 6141592Srgrimes cp = index(speed, '/'); 6151592Srgrimes if (cp) 6161592Srgrimes *cp++ = '\0'; 6171592Srgrimes cfsetspeed(&tt, atoi(speed)); 6181592Srgrimes } 6191592Srgrimes 6201592Srgrimes tt.c_iflag = TTYDEF_IFLAG; 6211592Srgrimes tt.c_oflag = TTYDEF_OFLAG; 6221592Srgrimes tt.c_lflag = TTYDEF_LFLAG; 6231592Srgrimes tcsetattr(fd, TCSAFLUSH, &tt); 6241592Srgrimes#else 6251592Srgrimes if (cp) { 6261592Srgrimes *cp++ = '\0'; 6271592Srgrimes speed = cp; 6281592Srgrimes cp = index(speed, '/'); 6291592Srgrimes if (cp) 6301592Srgrimes *cp++ = '\0'; 6311592Srgrimes tcgetattr(fd, &tt); 6321592Srgrimes cfsetspeed(&tt, atoi(speed)); 6331592Srgrimes tcsetattr(fd, TCSAFLUSH, &tt); 6341592Srgrimes } 6351592Srgrimes#endif 6361592Srgrimes 6371592Srgrimes env[0] = term; 6381592Srgrimes env[1] = 0; 6391592Srgrimes environ = env; 6401592Srgrimes} 6411592Srgrimes 6421592Srgrimesvoid 6431592Srgrimesusage() 6441592Srgrimes{ 64551433Smarkm syslog(LOG_ERR, "usage: rlogind [-" ARGSTR "]"); 6461592Srgrimes} 647