2 * Copyright (c) 1989, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * @(#)sys_term.c 8.4+1 (Berkeley) 5/30/95
34 * $FreeBSD: src/crypto/telnet/telnetd/sys_term.c,v 1.7.2.5 2002/06/17 02:48:02 jmallett Exp $
35 * $DragonFly: src/crypto/telnet/telnetd/sys_term.c,v 1.2 2003/06/17 04:24:37 dillon Exp $
38 #include <sys/types.h>
45 #include "pathnames.h"
48 #include <libtelnet/auth.h>
51 int cleanopen(char *);
57 char wtmpf[] = _PATH_WTMP;
59 char wtmpf[] = "/var/log/wtmp";
62 char utmpf[] = _PATH_UTMP;
64 char utmpf[] = "/var/run/utmp";
68 extern char **environ;
70 #define SCPYN(a, b) (void) strncpy(a, b, sizeof(a))
71 #define SCMPN(a, b) strncmp(a, b, sizeof(a))
98 # define cfsetospeed(tp, val) (tp)->sg.sg_ospeed = (val)
99 # define cfsetispeed(tp, val) (tp)->sg.sg_ispeed = (val)
100 # define cfgetospeed(tp) (tp)->sg.sg_ospeed
101 # define cfgetispeed(tp) (tp)->sg.sg_ispeed
102 #else /* USE_TERMIO */
105 # define TCSANOW TCSETS
106 # define TCSADRAIN TCSETSW
107 # define tcgetattr(f, t) ioctl(f, TCGETS, (char *)t)
110 # define TCSANOW TCSETA
111 # define TCSADRAIN TCSETAW
112 # define tcgetattr(f, t) ioctl(f, TCGETA, (char *)t)
114 # define TCSANOW TIOCSETA
115 # define TCSADRAIN TIOCSETAW
116 # define tcgetattr(f, t) ioctl(f, TIOCGETA, (char *)t)
119 # define tcsetattr(f, a, t) ioctl(f, a, t)
120 # define cfsetospeed(tp, val) (tp)->c_cflag &= ~CBAUD; \
121 (tp)->c_cflag |= (val)
122 # define cfgetospeed(tp) ((tp)->c_cflag & CBAUD)
124 # define cfsetispeed(tp, val) (tp)->c_cflag &= ~CIBAUD; \
125 (tp)->c_cflag |= ((val)<<IBSHIFT)
126 # define cfgetispeed(tp) (((tp)->c_cflag & CIBAUD)>>IBSHIFT)
128 # define cfsetispeed(tp, val) (tp)->c_cflag &= ~CBAUD; \
129 (tp)->c_cflag |= (val)
130 # define cfgetispeed(tp) ((tp)->c_cflag & CBAUD)
132 # endif /* TCSANOW */
133 struct termios termbuf, termbuf2; /* pty control structure */
134 #endif /* USE_TERMIO */
136 #include <sys/types.h>
139 int cleanopen(char *);
140 void scrub_env(void);
141 static char **addarg(char **, const char *);
148 * These three routines are used to get and set the "termbuf" structure
149 * to and from the kernel. init_termbuf() gets the current settings.
150 * copy_termbuf() hands in a new "termbuf" to write to the kernel, and
151 * set_termbuf() writes the structure into the kernel.
158 (void) ioctl(pty, TIOCGETP, (char *)&termbuf.sg);
159 (void) ioctl(pty, TIOCGETC, (char *)&termbuf.tc);
160 (void) ioctl(pty, TIOCGLTC, (char *)&termbuf.ltc);
162 (void) ioctl(pty, TIOCGSTATE, (char *)&termbuf.state);
165 (void) tcgetattr(pty, &termbuf);
170 #if defined(LINEMODE) && defined(TIOCPKT_IOCTL)
172 copy_termbuf(char *cp, size_t len)
174 if (len > sizeof(termbuf))
175 len = sizeof(termbuf);
176 memmove((char *)&termbuf, cp, len);
179 #endif /* defined(LINEMODE) && defined(TIOCPKT_IOCTL) */
185 * Only make the necessary changes.
188 if (memcmp((char *)&termbuf.sg, (char *)&termbuf2.sg,
190 (void) ioctl(pty, TIOCSETN, (char *)&termbuf.sg);
191 if (memcmp((char *)&termbuf.tc, (char *)&termbuf2.tc,
193 (void) ioctl(pty, TIOCSETC, (char *)&termbuf.tc);
194 if (memcmp((char *)&termbuf.ltc, (char *)&termbuf2.ltc,
195 sizeof(termbuf.ltc)))
196 (void) ioctl(pty, TIOCSLTC, (char *)&termbuf.ltc);
197 if (termbuf.lflags != termbuf2.lflags)
198 (void) ioctl(pty, TIOCLSET, (char *)&termbuf.lflags);
199 #else /* USE_TERMIO */
200 if (memcmp((char *)&termbuf, (char *)&termbuf2, sizeof(termbuf)))
201 (void) tcsetattr(pty, TCSANOW, &termbuf);
202 #endif /* USE_TERMIO */
207 * spcset(func, valp, valpp)
209 * This function takes various special characters (func), and
210 * sets *valp to the current value of that character, and
211 * *valpp to point to where in the "termbuf" structure that
214 * It returns the SLC_ level of support for this function.
219 spcset(int func, cc_t *valp, cc_t **valpp)
223 *valp = termbuf.tc.t_eofc;
224 *valpp = (cc_t *)&termbuf.tc.t_eofc;
225 return(SLC_VARIABLE);
227 *valp = termbuf.sg.sg_erase;
228 *valpp = (cc_t *)&termbuf.sg.sg_erase;
229 return(SLC_VARIABLE);
231 *valp = termbuf.sg.sg_kill;
232 *valpp = (cc_t *)&termbuf.sg.sg_kill;
233 return(SLC_VARIABLE);
235 *valp = termbuf.tc.t_intrc;
236 *valpp = (cc_t *)&termbuf.tc.t_intrc;
237 return(SLC_VARIABLE|SLC_FLUSHIN|SLC_FLUSHOUT);
239 *valp = termbuf.tc.t_quitc;
240 *valpp = (cc_t *)&termbuf.tc.t_quitc;
241 return(SLC_VARIABLE|SLC_FLUSHIN|SLC_FLUSHOUT);
243 *valp = termbuf.tc.t_startc;
244 *valpp = (cc_t *)&termbuf.tc.t_startc;
245 return(SLC_VARIABLE);
247 *valp = termbuf.tc.t_stopc;
248 *valpp = (cc_t *)&termbuf.tc.t_stopc;
249 return(SLC_VARIABLE);
251 *valp = termbuf.ltc.t_flushc;
252 *valpp = (cc_t *)&termbuf.ltc.t_flushc;
253 return(SLC_VARIABLE);
255 *valp = termbuf.ltc.t_suspc;
256 *valpp = (cc_t *)&termbuf.ltc.t_suspc;
257 return(SLC_VARIABLE);
259 *valp = termbuf.ltc.t_werasc;
260 *valpp = (cc_t *)&termbuf.ltc.t_werasc;
261 return(SLC_VARIABLE);
263 *valp = termbuf.ltc.t_rprntc;
264 *valpp = (cc_t *)&termbuf.ltc.t_rprntc;
265 return(SLC_VARIABLE);
267 *valp = termbuf.ltc.t_lnextc;
268 *valpp = (cc_t *)&termbuf.ltc.t_lnextc;
269 return(SLC_VARIABLE);
271 *valp = termbuf.tc.t_brkc;
272 *valpp = (cc_t *)&termbuf.ltc.t_lnextc;
273 return(SLC_VARIABLE);
284 return(SLC_NOSUPPORT);
288 #else /* USE_TERMIO */
291 #define setval(a, b) *valp = termbuf.c_cc[a]; \
292 *valpp = &termbuf.c_cc[a]; \
294 #define defval(a) *valp = ((cc_t)a); *valpp = NULL; return(SLC_DEFAULT);
297 spcset(int func, cc_t *valp, cc_t **valpp)
301 setval(VEOF, SLC_VARIABLE);
303 setval(VERASE, SLC_VARIABLE);
305 setval(VKILL, SLC_VARIABLE);
307 setval(VINTR, SLC_VARIABLE|SLC_FLUSHIN|SLC_FLUSHOUT);
309 setval(VQUIT, SLC_VARIABLE|SLC_FLUSHIN|SLC_FLUSHOUT);
312 setval(VSTART, SLC_VARIABLE);
318 setval(VSTOP, SLC_VARIABLE);
324 setval(VWERASE, SLC_VARIABLE);
330 setval(VREPRINT, SLC_VARIABLE);
336 setval(VLNEXT, SLC_VARIABLE);
341 #if !defined(VDISCARD) && defined(VFLUSHO)
342 # define VDISCARD VFLUSHO
345 setval(VDISCARD, SLC_VARIABLE|SLC_FLUSHOUT);
351 setval(VSUSP, SLC_VARIABLE|SLC_FLUSHIN);
357 setval(VEOL, SLC_VARIABLE);
361 setval(VEOL2, SLC_VARIABLE);
365 setval(VSTATUS, SLC_VARIABLE);
378 return(SLC_NOSUPPORT);
381 #endif /* USE_TERMIO */
386 * Allocate a pty. As a side effect, the external character
387 * array "line" contains the name of the slave side.
389 * Returns the file descriptor of the opened pty.
391 char alpha[] = "0123456789abcdefghijklmnopqrstuv";
395 getpty(int *ptynum __unused)
402 (void) strcpy(line, _PATH_DEV);
403 (void) strcat(line, "ptyXX");
407 for (cp = "pqrsPQRS"; *cp; cp++) {
413 * This stat() check is just to keep us from
414 * looping through all 256 combinations if there
415 * aren't that many ptys available.
417 if (stat(line, &stb) < 0)
419 for (i = 0; i < 32; i++) {
435 * tty_flowmode() Find out if flow control is enabled or disabled.
436 * tty_linemode() Find out if linemode (external processing) is enabled.
437 * tty_setlinemod(on) Turn on/off linemode.
438 * tty_isecho() Find out if echoing is turned on.
439 * tty_setecho(on) Enable/disable character echoing.
440 * tty_israw() Find out if terminal is in RAW mode.
441 * tty_binaryin(on) Turn on/off BINARY on input.
442 * tty_binaryout(on) Turn on/off BINARY on output.
443 * tty_isediting() Find out if line editing is enabled.
444 * tty_istrapsig() Find out if signal trapping is enabled.
445 * tty_setedit(on) Turn on/off line editing.
446 * tty_setsig(on) Turn on/off signal trapping.
447 * tty_issofttab() Find out if tab expansion is enabled.
448 * tty_setsofttab(on) Turn on/off soft tab expansion.
449 * tty_islitecho() Find out if typed control chars are echoed literally
450 * tty_setlitecho() Turn on/off literal echo of control chars
451 * tty_tspeed(val) Set transmit speed to val.
452 * tty_rspeed(val) Set receive speed to val.
460 return(termbuf.state & TS_EXTPROC);
462 return(termbuf.c_lflag & EXTPROC);
467 tty_setlinemode(int on)
471 (void) ioctl(pty, TIOCEXT, (char *)&on);
476 termbuf.c_lflag |= EXTPROC;
478 termbuf.c_lflag &= ~EXTPROC;
482 #endif /* LINEMODE */
488 return (termbuf.sg.sg_flags & ECHO);
490 return (termbuf.c_lflag & ECHO);
498 return(((termbuf.tc.t_startc) > 0 && (termbuf.tc.t_stopc) > 0) ? 1 : 0);
500 return((termbuf.c_iflag & IXON) ? 1 : 0);
509 return((termbuf.lflags & DECCTQ) ? 0 : 1);
514 return((termbuf.c_iflag & IXANY) ? 1 : 0);
523 termbuf.sg.sg_flags |= ECHO|CRMOD;
525 termbuf.sg.sg_flags &= ~(ECHO|CRMOD);
528 termbuf.c_lflag |= ECHO;
530 termbuf.c_lflag &= ~ECHO;
538 return(termbuf.sg.sg_flags & RAW);
540 return(!(termbuf.c_lflag & ICANON));
544 #ifdef AUTHENTICATION
545 #if defined(NO_LOGIN_F) && defined(LOGIN_R)
551 termbuf.sg.sg_flags |= RAW;
553 termbuf.sg.sg_flags &= ~RAW;
556 termbuf.c_lflag &= ~ICANON;
558 termbuf.c_lflag |= ICANON;
562 #endif /* AUTHENTICATION */
569 termbuf.lflags |= LPASS8;
571 termbuf.lflags &= ~LPASS8;
574 termbuf.c_iflag &= ~ISTRIP;
576 termbuf.c_iflag |= ISTRIP;
582 tty_binaryout(int on)
586 termbuf.lflags |= LLITOUT;
588 termbuf.lflags &= ~LLITOUT;
591 termbuf.c_cflag &= ~(CSIZE|PARENB);
592 termbuf.c_cflag |= CS8;
593 termbuf.c_oflag &= ~OPOST;
595 termbuf.c_cflag &= ~CSIZE;
596 termbuf.c_cflag |= CS7|PARENB;
597 termbuf.c_oflag |= OPOST;
606 return(termbuf.lflags & LPASS8);
608 return(!(termbuf.c_iflag & ISTRIP));
613 tty_isbinaryout(void)
616 return(termbuf.lflags & LLITOUT);
618 return(!(termbuf.c_oflag&OPOST));
627 return(!(termbuf.sg.sg_flags & (CBREAK|RAW)));
629 return(termbuf.c_lflag & ICANON);
637 return(!(termbuf.sg.sg_flags&RAW));
639 return(termbuf.c_lflag & ISIG);
648 termbuf.sg.sg_flags &= ~CBREAK;
650 termbuf.sg.sg_flags |= CBREAK;
653 termbuf.c_lflag |= ICANON;
655 termbuf.c_lflag &= ~ICANON;
667 termbuf.c_lflag |= ISIG;
669 termbuf.c_lflag &= ~ISIG;
672 #endif /* LINEMODE */
678 return (termbuf.sg.sg_flags & XTABS);
681 return (termbuf.c_oflag & OXTABS);
684 return ((termbuf.c_oflag & TABDLY) == TAB3);
690 tty_setsofttab(int on)
694 termbuf.sg.sg_flags |= XTABS;
696 termbuf.sg.sg_flags &= ~XTABS;
700 termbuf.c_oflag |= OXTABS;
703 termbuf.c_oflag &= ~TABDLY;
704 termbuf.c_oflag |= TAB3;
708 termbuf.c_oflag &= ~OXTABS;
711 termbuf.c_oflag &= ~TABDLY;
712 termbuf.c_oflag |= TAB0;
722 return (!(termbuf.lflags & LCTLECH));
725 return (!(termbuf.c_lflag & ECHOCTL));
728 return (!(termbuf.c_lflag & TCTLECH));
730 # if !defined(ECHOCTL) && !defined(TCTLECH)
731 return (0); /* assumes ctl chars are echoed '^x' */
737 tty_setlitecho(int on)
741 termbuf.lflags &= ~LCTLECH;
743 termbuf.lflags |= LCTLECH;
747 termbuf.c_lflag &= ~ECHOCTL;
749 termbuf.c_lflag |= ECHOCTL;
753 termbuf.c_lflag &= ~TCTLECH;
755 termbuf.c_lflag |= TCTLECH;
764 return (termbuf.sg.sg_flags & CRMOD);
766 return (termbuf.c_iflag & ICRNL);
771 * Try to guess whether speeds are "encoded" (4.2BSD) or just numeric (4.4BSD).
780 * A table of available terminal speeds
786 { 0, B0 }, { 50, B50 }, { 75, B75 },
787 { 110, B110 }, { 134, B134 }, { 150, B150 },
788 { 200, B200 }, { 300, B300 }, { 600, B600 },
789 { 1200, B1200 }, { 1800, B1800 }, { 2400, B2400 },
818 #endif /* DECODE_BAUD */
824 struct termspeeds *tp;
826 for (tp = termspeeds; (tp->speed != -1) && (val > tp->speed); tp++)
828 if (tp->speed == -1) /* back up to last valid value */
830 cfsetospeed(&termbuf, tp->value);
831 #else /* DECODE_BAUD */
832 cfsetospeed(&termbuf, val);
833 #endif /* DECODE_BAUD */
840 struct termspeeds *tp;
842 for (tp = termspeeds; (tp->speed != -1) && (val > tp->speed); tp++)
844 if (tp->speed == -1) /* back up to last valid value */
846 cfsetispeed(&termbuf, tp->value);
847 #else /* DECODE_BAUD */
848 cfsetispeed(&termbuf, val);
849 #endif /* DECODE_BAUD */
855 * Open the slave side of the pty, and do any initialization
869 extern int def_row, def_col;
871 extern int def_tspeed, def_rspeed;
873 * Opening the slave side may cause initilization of the
874 * kernel tty structure. We need remember the state of
875 * if linemode was turned on
876 * terminal window size
879 * so that we can re-set them if we need to.
882 waslm = tty_linemode();
884 erase = termbuf.c_cc[VERASE];
887 * Make sure that we don't have a controlling tty, and
888 * that we are the session (process group) leader.
891 t = open(_PATH_TTY, O_RDWR);
893 (void) ioctl(t, TIOCNOTTY, NULL);
900 fatalperror(net, line);
904 * set up the tty modes as we like them to be.
908 if (def_row || def_col) {
909 memset((char *)&ws, 0, sizeof(ws));
912 (void)ioctl(t, TIOCSWINSZ, (char *)&ws);
917 * Settings for sgtty based systems
920 termbuf.sg.sg_flags |= CRMOD|ANYP|ECHO|XTABS;
921 # endif /* USE_TERMIO */
924 * Settings for all other termios/termio based
925 * systems, other than 4.4BSD. In 4.4BSD the
926 * kernel does the initial terminal setup.
928 tty_rspeed((def_rspeed > 0) ? def_rspeed : 9600);
929 tty_tspeed((def_tspeed > 0) ? def_tspeed : 9600);
931 termbuf.c_cc[VERASE] = erase;
935 # endif /* LINEMODE */
938 * Set the tty modes, and make this our controlling tty.
941 if (login_tty(t) == -1)
942 fatalperror(net, "login_tty");
945 #ifdef AUTHENTICATION
946 #if defined(NO_LOGIN_F) && defined(LOGIN_R)
948 * Leave the pty open so that we can write out the rlogin
949 * protocol for /bin/login, if the authentication works.
957 #endif /* AUTHENTICATION */
964 * Open the specified slave side of the pty,
965 * making sure that we have a clean tty.
973 * Make sure that other people can't open the
974 * slave side of the connection.
976 (void) chown(li, 0, 0);
977 (void) chmod(li, 0600);
981 t = open(line, O_RDWR|O_NOCTTY);
992 * Given a hostname, do whatever
993 * is necessary to startup the login process on the slave side of the pty.
998 startslave(char *host, int autologin, char *autoname)
1002 #ifdef AUTHENTICATION
1003 if (!autoname || !autoname[0])
1006 if (autologin < auth_level) {
1007 fatal(net, "Authorization failed");
1013 if ((i = fork()) < 0)
1014 fatalperror(net, "fork");
1018 start_login(host, autologin, autoname);
1029 if ((*envp = getenv("TZ")))
1039 * Assuming that we are now running as a child processes, this
1040 * function will turn us into the login process.
1043 #ifndef AUTHENTICATION
1044 #define undef1 __unused
1050 start_login(char *host undef1, int autologin undef1, char *name undef1)
1057 * -h : pass on name of host.
1058 * WARNING: -h is accepted by login if and only if
1060 * -p : don't clobber the environment (so terminal type stays set).
1062 * -f : force this login, he has already been authenticated
1064 argv = addarg(0, "login");
1066 #if !defined(NO_LOGIN_H)
1067 #ifdef AUTHENTICATION
1068 # if defined(NO_LOGIN_F) && defined(LOGIN_R)
1070 * Don't add the "-h host" option if we are going
1071 * to be adding the "-r host" option down below...
1073 if ((auth_level < 0) || (autologin != AUTH_VALID))
1076 argv = addarg(argv, "-h");
1077 argv = addarg(argv, host);
1079 #endif /* AUTHENTICATION */
1081 #if !defined(NO_LOGIN_P)
1082 argv = addarg(argv, "-p");
1086 * Set the environment variable "LINEMODE" to either
1087 * "real" or "kludge" if we are operating in either
1088 * real or kludge linemode.
1090 if (lmodetype == REAL_LINEMODE) {
1091 if (setenv("LINEMODE", "real", 1) == -1)
1092 syslog(LOG_ERR, "setenv: cannot set LINEMODE=real: %m");
1094 # ifdef KLUDGELINEMODE
1095 else if (lmodetype == KLUDGE_LINEMODE || lmodetype == KLUDGE_OK) {
1096 if (setenv("LINEMODE", "kludge", 1) == -1)
1097 syslog(LOG_ERR, "setenv: cannot set LINEMODE=kludge: %m");
1103 * Are we working as the bftp daemon? If so, then ask login
1104 * to start bftp instead of shell.
1107 argv = addarg(argv, "-e");
1108 argv = addarg(argv, BFTPPATH);
1111 #ifdef AUTHENTICATION
1112 if (auth_level >= 0 && autologin == AUTH_VALID) {
1113 # if !defined(NO_LOGIN_F)
1114 argv = addarg(argv, "-f");
1115 argv = addarg(argv, "--");
1116 argv = addarg(argv, name);
1118 # if defined(LOGIN_R)
1120 * We don't have support for "login -f", but we
1121 * can fool /bin/login into thinking that we are
1122 * rlogind, and allow us to log in without a
1123 * password. The rlogin protocol expects
1124 * local-user\0remote-user\0term/speed\0
1130 int isecho, israw, xpty, len;
1131 extern int def_rspeed;
1134 * Tell login that we are coming from "localhost".
1135 * If we passed in the real host name, then the
1136 * user would have to allow .rhost access from
1137 * every machine that they want authenticated
1138 * access to work from, which sort of defeats
1139 * the purpose of an authenticated login...
1140 * So, we tell login that the session is coming
1141 * from "localhost", and the user will only have
1142 * to have "localhost" in their .rhost file.
1144 # define LOGIN_HOST "localhost"
1146 argv = addarg(argv, "-r");
1147 argv = addarg(argv, LOGIN_HOST);
1152 isecho = tty_isecho();
1153 israw = tty_israw();
1154 if (isecho || !israw) {
1155 tty_setecho(0); /* Turn off echo */
1156 tty_setraw(1); /* Turn on raw */
1159 len = strlen(name)+1;
1160 write(xpty, name, len);
1161 write(xpty, name, len);
1162 snprintf(speed, sizeof(speed),
1163 "%s/%d", (cp = getenv("TERM")) ? cp : "",
1164 (def_rspeed > 0) ? def_rspeed : 9600);
1165 len = strlen(speed)+1;
1166 write(xpty, speed, len);
1168 if (isecho || !israw) {
1170 tty_setecho(isecho);
1175 * Write a newline to ensure
1176 * that login will be able to
1179 write(xpty, "\n", 1);
1185 argv = addarg(argv, "--");
1186 argv = addarg(argv, name);
1191 if (getenv("USER")) {
1192 argv = addarg(argv, "--");
1193 argv = addarg(argv, getenv("USER"));
1194 #if defined(LOGIN_ARGS) && defined(NO_LOGIN_P)
1197 for (cpp = environ; *cpp; cpp++)
1198 argv = addarg(argv, *cpp);
1202 * Assume that login will set the USER variable
1203 * correctly. For SysV systems, this means that
1204 * USER will no longer be set, just LOGNAME by
1205 * login. (The problem is that if the auto-login
1206 * fails, and the user then specifies a different
1207 * account name, he can get logged in with both
1208 * LOGNAME and USER in his environment, but the
1209 * USER value will be wrong.
1213 #ifdef AUTHENTICATION
1214 #if defined(NO_LOGIN_F) && defined(LOGIN_R)
1218 #endif /* AUTHENTICATION */
1221 if (altlogin == NULL) {
1222 altlogin = _PATH_LOGIN;
1224 execv(altlogin, argv);
1226 syslog(LOG_ERR, "%s: %m", altlogin);
1227 fatalperror(net, altlogin);
1232 addarg(char **argv, const char *val)
1238 * 10 entries, a leading length, and a null
1240 argv = (char **)malloc(sizeof(*argv) * 12);
1243 *argv++ = (char *)10;
1246 for (cpp = argv; *cpp; cpp++)
1248 if (cpp == &argv[(long)argv[-1]]) {
1250 *argv = (char *)((long)(*argv) + 10);
1251 argv = (char **)realloc(argv, sizeof(*argv)*((long)(*argv) + 2));
1255 cpp = &argv[(long)argv[-1] - 10];
1257 *cpp++ = strdup(val);
1265 * We only accept the environment variables listed below.
1270 static const char *rej[] = {
1275 static const char *acc[] = {
1276 "XAUTH=", "XAUTHORITY=", "DISPLAY=",
1288 char ** new_environ;
1291 /* Allocate space for scrubbed environment. */
1292 for (count = 1, cpp = environ; *cpp; count++, cpp++)
1294 if ((new_environ = malloc(count * sizeof(char *))) == NULL) {
1299 for (cpp2 = new_environ, cpp = environ; *cpp; cpp++) {
1302 for(p = rej; *p; p++)
1303 if(strncmp(*cpp, *p, strlen(*p)) == 0) {
1310 for(p = acc; *p; p++)
1311 if(strncmp(*cpp, *p, strlen(*p)) == 0)
1314 if ((*cpp2++ = strdup(*cpp)) == NULL) {
1315 environ = new_environ;
1321 environ = new_environ;
1327 * This is the routine to call when we are all through, to
1328 * clean up anything that needs to be cleaned up.
1332 cleanup(int sig __unused)
1337 p = line + sizeof(_PATH_DEV) - 1;
1339 * Block all signals before clearing the utmp entry. We don't want to
1340 * be called again after calling logout() and then not add the wtmp
1341 * entry because of not finding the corresponding entry in utmp.
1344 sigprocmask(SIG_SETMASK, &mask, NULL);
1347 (void)chmod(line, 0666);
1348 (void)chown(line, 0, 0);
1350 (void)chmod(line, 0666);
1351 (void)chown(line, 0, 0);
1352 (void) shutdown(net, SHUT_RDWR);