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 $
37 #include <sys/types.h>
44 #include "pathnames.h"
47 #include <libtelnet/auth.h>
50 int cleanopen(char *);
56 char wtmpf[] = _PATH_WTMP;
58 char wtmpf[] = "/var/log/wtmp";
61 char utmpf[] = _PATH_UTMP;
63 char utmpf[] = "/var/run/utmp";
67 extern char **environ;
69 #define SCPYN(a, b) (void) strncpy(a, b, sizeof(a))
70 #define SCMPN(a, b) strncmp(a, b, sizeof(a))
97 # define cfsetospeed(tp, val) (tp)->sg.sg_ospeed = (val)
98 # define cfsetispeed(tp, val) (tp)->sg.sg_ispeed = (val)
99 # define cfgetospeed(tp) (tp)->sg.sg_ospeed
100 # define cfgetispeed(tp) (tp)->sg.sg_ispeed
101 #else /* USE_TERMIO */
104 # define TCSANOW TCSETS
105 # define TCSADRAIN TCSETSW
106 # define tcgetattr(f, t) ioctl(f, TCGETS, (char *)t)
109 # define TCSANOW TCSETA
110 # define TCSADRAIN TCSETAW
111 # define tcgetattr(f, t) ioctl(f, TCGETA, (char *)t)
113 # define TCSANOW TIOCSETA
114 # define TCSADRAIN TIOCSETAW
115 # define tcgetattr(f, t) ioctl(f, TIOCGETA, (char *)t)
118 # define tcsetattr(f, a, t) ioctl(f, a, t)
119 # define cfsetospeed(tp, val) (tp)->c_cflag &= ~CBAUD; \
120 (tp)->c_cflag |= (val)
121 # define cfgetospeed(tp) ((tp)->c_cflag & CBAUD)
123 # define cfsetispeed(tp, val) (tp)->c_cflag &= ~CIBAUD; \
124 (tp)->c_cflag |= ((val)<<IBSHIFT)
125 # define cfgetispeed(tp) (((tp)->c_cflag & CIBAUD)>>IBSHIFT)
127 # define cfsetispeed(tp, val) (tp)->c_cflag &= ~CBAUD; \
128 (tp)->c_cflag |= (val)
129 # define cfgetispeed(tp) ((tp)->c_cflag & CBAUD)
131 # endif /* TCSANOW */
132 struct termios termbuf, termbuf2; /* pty control structure */
133 #endif /* USE_TERMIO */
135 int cleanopen(char *);
136 void scrub_env(void);
137 static char **addarg(char **, const char *);
144 * These three routines are used to get and set the "termbuf" structure
145 * to and from the kernel. init_termbuf() gets the current settings.
146 * copy_termbuf() hands in a new "termbuf" to write to the kernel, and
147 * set_termbuf() writes the structure into the kernel.
154 (void) ioctl(pty, TIOCGETP, (char *)&termbuf.sg);
155 (void) ioctl(pty, TIOCGETC, (char *)&termbuf.tc);
156 (void) ioctl(pty, TIOCGLTC, (char *)&termbuf.ltc);
158 (void) ioctl(pty, TIOCGSTATE, (char *)&termbuf.state);
161 (void) tcgetattr(pty, &termbuf);
166 #if defined(LINEMODE) && defined(TIOCPKT_IOCTL)
168 copy_termbuf(char *cp, size_t len)
170 if (len > sizeof(termbuf))
171 len = sizeof(termbuf);
172 memmove((char *)&termbuf, cp, len);
175 #endif /* defined(LINEMODE) && defined(TIOCPKT_IOCTL) */
181 * Only make the necessary changes.
184 if (memcmp((char *)&termbuf.sg, (char *)&termbuf2.sg,
186 (void) ioctl(pty, TIOCSETN, (char *)&termbuf.sg);
187 if (memcmp((char *)&termbuf.tc, (char *)&termbuf2.tc,
189 (void) ioctl(pty, TIOCSETC, (char *)&termbuf.tc);
190 if (memcmp((char *)&termbuf.ltc, (char *)&termbuf2.ltc,
191 sizeof(termbuf.ltc)))
192 (void) ioctl(pty, TIOCSLTC, (char *)&termbuf.ltc);
193 if (termbuf.lflags != termbuf2.lflags)
194 (void) ioctl(pty, TIOCLSET, (char *)&termbuf.lflags);
195 #else /* USE_TERMIO */
196 if (memcmp((char *)&termbuf, (char *)&termbuf2, sizeof(termbuf)))
197 (void) tcsetattr(pty, TCSANOW, &termbuf);
198 #endif /* USE_TERMIO */
203 * spcset(func, valp, valpp)
205 * This function takes various special characters (func), and
206 * sets *valp to the current value of that character, and
207 * *valpp to point to where in the "termbuf" structure that
210 * It returns the SLC_ level of support for this function.
215 spcset(int func, cc_t *valp, cc_t **valpp)
219 *valp = termbuf.tc.t_eofc;
220 *valpp = (cc_t *)&termbuf.tc.t_eofc;
221 return(SLC_VARIABLE);
223 *valp = termbuf.sg.sg_erase;
224 *valpp = (cc_t *)&termbuf.sg.sg_erase;
225 return(SLC_VARIABLE);
227 *valp = termbuf.sg.sg_kill;
228 *valpp = (cc_t *)&termbuf.sg.sg_kill;
229 return(SLC_VARIABLE);
231 *valp = termbuf.tc.t_intrc;
232 *valpp = (cc_t *)&termbuf.tc.t_intrc;
233 return(SLC_VARIABLE|SLC_FLUSHIN|SLC_FLUSHOUT);
235 *valp = termbuf.tc.t_quitc;
236 *valpp = (cc_t *)&termbuf.tc.t_quitc;
237 return(SLC_VARIABLE|SLC_FLUSHIN|SLC_FLUSHOUT);
239 *valp = termbuf.tc.t_startc;
240 *valpp = (cc_t *)&termbuf.tc.t_startc;
241 return(SLC_VARIABLE);
243 *valp = termbuf.tc.t_stopc;
244 *valpp = (cc_t *)&termbuf.tc.t_stopc;
245 return(SLC_VARIABLE);
247 *valp = termbuf.ltc.t_flushc;
248 *valpp = (cc_t *)&termbuf.ltc.t_flushc;
249 return(SLC_VARIABLE);
251 *valp = termbuf.ltc.t_suspc;
252 *valpp = (cc_t *)&termbuf.ltc.t_suspc;
253 return(SLC_VARIABLE);
255 *valp = termbuf.ltc.t_werasc;
256 *valpp = (cc_t *)&termbuf.ltc.t_werasc;
257 return(SLC_VARIABLE);
259 *valp = termbuf.ltc.t_rprntc;
260 *valpp = (cc_t *)&termbuf.ltc.t_rprntc;
261 return(SLC_VARIABLE);
263 *valp = termbuf.ltc.t_lnextc;
264 *valpp = (cc_t *)&termbuf.ltc.t_lnextc;
265 return(SLC_VARIABLE);
267 *valp = termbuf.tc.t_brkc;
268 *valpp = (cc_t *)&termbuf.ltc.t_lnextc;
269 return(SLC_VARIABLE);
280 return(SLC_NOSUPPORT);
284 #else /* USE_TERMIO */
287 #define setval(a, b) *valp = termbuf.c_cc[a]; \
288 *valpp = &termbuf.c_cc[a]; \
290 #define defval(a) *valp = ((cc_t)a); *valpp = NULL; return(SLC_DEFAULT);
293 spcset(int func, cc_t *valp, cc_t **valpp)
297 setval(VEOF, SLC_VARIABLE);
299 setval(VERASE, SLC_VARIABLE);
301 setval(VKILL, SLC_VARIABLE);
303 setval(VINTR, SLC_VARIABLE|SLC_FLUSHIN|SLC_FLUSHOUT);
305 setval(VQUIT, SLC_VARIABLE|SLC_FLUSHIN|SLC_FLUSHOUT);
308 setval(VSTART, SLC_VARIABLE);
314 setval(VSTOP, SLC_VARIABLE);
320 setval(VWERASE, SLC_VARIABLE);
326 setval(VREPRINT, SLC_VARIABLE);
332 setval(VLNEXT, SLC_VARIABLE);
337 #if !defined(VDISCARD) && defined(VFLUSHO)
338 # define VDISCARD VFLUSHO
341 setval(VDISCARD, SLC_VARIABLE|SLC_FLUSHOUT);
347 setval(VSUSP, SLC_VARIABLE|SLC_FLUSHIN);
353 setval(VEOL, SLC_VARIABLE);
357 setval(VEOL2, SLC_VARIABLE);
361 setval(VSTATUS, SLC_VARIABLE);
374 return(SLC_NOSUPPORT);
377 #endif /* USE_TERMIO */
382 * Allocate a pty. As a side effect, the external character
383 * array "line" contains the name of the slave side.
385 * Returns the file descriptor of the opened pty.
387 char alpha[] = "0123456789abcdefghijklmnopqrstuv";
391 getpty(int *ptynum __unused)
398 (void) strcpy(line, _PATH_DEV);
399 (void) strcat(line, "ptyXX");
403 for (cp = "pqrsPQRS"; *cp; cp++) {
409 * This stat() check is just to keep us from
410 * looping through all 256 combinations if there
411 * aren't that many ptys available.
413 if (stat(line, &stb) < 0)
415 for (i = 0; i < 32; i++) {
431 * tty_flowmode() Find out if flow control is enabled or disabled.
432 * tty_linemode() Find out if linemode (external processing) is enabled.
433 * tty_setlinemod(on) Turn on/off linemode.
434 * tty_isecho() Find out if echoing is turned on.
435 * tty_setecho(on) Enable/disable character echoing.
436 * tty_israw() Find out if terminal is in RAW mode.
437 * tty_binaryin(on) Turn on/off BINARY on input.
438 * tty_binaryout(on) Turn on/off BINARY on output.
439 * tty_isediting() Find out if line editing is enabled.
440 * tty_istrapsig() Find out if signal trapping is enabled.
441 * tty_setedit(on) Turn on/off line editing.
442 * tty_setsig(on) Turn on/off signal trapping.
443 * tty_issofttab() Find out if tab expansion is enabled.
444 * tty_setsofttab(on) Turn on/off soft tab expansion.
445 * tty_islitecho() Find out if typed control chars are echoed literally
446 * tty_setlitecho() Turn on/off literal echo of control chars
447 * tty_tspeed(val) Set transmit speed to val.
448 * tty_rspeed(val) Set receive speed to val.
456 return(termbuf.state & TS_EXTPROC);
458 return(termbuf.c_lflag & EXTPROC);
463 tty_setlinemode(int on)
467 (void) ioctl(pty, TIOCEXT, (char *)&on);
472 termbuf.c_lflag |= EXTPROC;
474 termbuf.c_lflag &= ~EXTPROC;
478 #endif /* LINEMODE */
484 return (termbuf.sg.sg_flags & ECHO);
486 return (termbuf.c_lflag & ECHO);
494 return(((termbuf.tc.t_startc) > 0 && (termbuf.tc.t_stopc) > 0) ? 1 : 0);
496 return((termbuf.c_iflag & IXON) ? 1 : 0);
505 return((termbuf.lflags & DECCTQ) ? 0 : 1);
510 return((termbuf.c_iflag & IXANY) ? 1 : 0);
519 termbuf.sg.sg_flags |= ECHO|CRMOD;
521 termbuf.sg.sg_flags &= ~(ECHO|CRMOD);
524 termbuf.c_lflag |= ECHO;
526 termbuf.c_lflag &= ~ECHO;
534 return(termbuf.sg.sg_flags & RAW);
536 return(!(termbuf.c_lflag & ICANON));
540 #ifdef AUTHENTICATION
541 #if defined(NO_LOGIN_F) && defined(LOGIN_R)
547 termbuf.sg.sg_flags |= RAW;
549 termbuf.sg.sg_flags &= ~RAW;
552 termbuf.c_lflag &= ~ICANON;
554 termbuf.c_lflag |= ICANON;
558 #endif /* AUTHENTICATION */
565 termbuf.lflags |= LPASS8;
567 termbuf.lflags &= ~LPASS8;
570 termbuf.c_iflag &= ~ISTRIP;
572 termbuf.c_iflag |= ISTRIP;
578 tty_binaryout(int on)
582 termbuf.lflags |= LLITOUT;
584 termbuf.lflags &= ~LLITOUT;
587 termbuf.c_cflag &= ~(CSIZE|PARENB);
588 termbuf.c_cflag |= CS8;
589 termbuf.c_oflag &= ~OPOST;
591 termbuf.c_cflag &= ~CSIZE;
592 termbuf.c_cflag |= CS7|PARENB;
593 termbuf.c_oflag |= OPOST;
602 return(termbuf.lflags & LPASS8);
604 return(!(termbuf.c_iflag & ISTRIP));
609 tty_isbinaryout(void)
612 return(termbuf.lflags & LLITOUT);
614 return(!(termbuf.c_oflag&OPOST));
623 return(!(termbuf.sg.sg_flags & (CBREAK|RAW)));
625 return(termbuf.c_lflag & ICANON);
633 return(!(termbuf.sg.sg_flags&RAW));
635 return(termbuf.c_lflag & ISIG);
644 termbuf.sg.sg_flags &= ~CBREAK;
646 termbuf.sg.sg_flags |= CBREAK;
649 termbuf.c_lflag |= ICANON;
651 termbuf.c_lflag &= ~ICANON;
663 termbuf.c_lflag |= ISIG;
665 termbuf.c_lflag &= ~ISIG;
668 #endif /* LINEMODE */
674 return (termbuf.sg.sg_flags & XTABS);
677 return (termbuf.c_oflag & OXTABS);
680 return ((termbuf.c_oflag & TABDLY) == TAB3);
686 tty_setsofttab(int on)
690 termbuf.sg.sg_flags |= XTABS;
692 termbuf.sg.sg_flags &= ~XTABS;
696 termbuf.c_oflag |= OXTABS;
699 termbuf.c_oflag &= ~TABDLY;
700 termbuf.c_oflag |= TAB3;
704 termbuf.c_oflag &= ~OXTABS;
707 termbuf.c_oflag &= ~TABDLY;
708 termbuf.c_oflag |= TAB0;
718 return (!(termbuf.lflags & LCTLECH));
721 return (!(termbuf.c_lflag & ECHOCTL));
724 return (!(termbuf.c_lflag & TCTLECH));
726 # if !defined(ECHOCTL) && !defined(TCTLECH)
727 return (0); /* assumes ctl chars are echoed '^x' */
733 tty_setlitecho(int on)
737 termbuf.lflags &= ~LCTLECH;
739 termbuf.lflags |= LCTLECH;
743 termbuf.c_lflag &= ~ECHOCTL;
745 termbuf.c_lflag |= ECHOCTL;
749 termbuf.c_lflag &= ~TCTLECH;
751 termbuf.c_lflag |= TCTLECH;
760 return (termbuf.sg.sg_flags & CRMOD);
762 return (termbuf.c_iflag & ICRNL);
767 * Try to guess whether speeds are "encoded" (4.2BSD) or just numeric (4.4BSD).
776 * A table of available terminal speeds
782 { 0, B0 }, { 50, B50 }, { 75, B75 },
783 { 110, B110 }, { 134, B134 }, { 150, B150 },
784 { 200, B200 }, { 300, B300 }, { 600, B600 },
785 { 1200, B1200 }, { 1800, B1800 }, { 2400, B2400 },
814 #endif /* DECODE_BAUD */
820 struct termspeeds *tp;
822 for (tp = termspeeds; (tp->speed != -1) && (val > tp->speed); tp++)
824 if (tp->speed == -1) /* back up to last valid value */
826 cfsetospeed(&termbuf, tp->value);
827 #else /* DECODE_BAUD */
828 cfsetospeed(&termbuf, val);
829 #endif /* DECODE_BAUD */
836 struct termspeeds *tp;
838 for (tp = termspeeds; (tp->speed != -1) && (val > tp->speed); tp++)
840 if (tp->speed == -1) /* back up to last valid value */
842 cfsetispeed(&termbuf, tp->value);
843 #else /* DECODE_BAUD */
844 cfsetispeed(&termbuf, val);
845 #endif /* DECODE_BAUD */
851 * Open the slave side of the pty, and do any initialization
865 extern int def_row, def_col;
867 extern int def_tspeed, def_rspeed;
869 * Opening the slave side may cause initilization of the
870 * kernel tty structure. We need remember the state of
871 * if linemode was turned on
872 * terminal window size
875 * so that we can re-set them if we need to.
878 waslm = tty_linemode();
880 erase = termbuf.c_cc[VERASE];
883 * Make sure that we don't have a controlling tty, and
884 * that we are the session (process group) leader.
887 t = open(_PATH_TTY, O_RDWR);
889 (void) ioctl(t, TIOCNOTTY, NULL);
896 fatalperror(net, line);
900 * set up the tty modes as we like them to be.
904 if (def_row || def_col) {
905 memset((char *)&ws, 0, sizeof(ws));
908 (void)ioctl(t, TIOCSWINSZ, (char *)&ws);
913 * Settings for sgtty based systems
916 termbuf.sg.sg_flags |= CRMOD|ANYP|ECHO|XTABS;
917 # endif /* USE_TERMIO */
920 * Settings for all other termios/termio based
921 * systems, other than 4.4BSD. In 4.4BSD the
922 * kernel does the initial terminal setup.
924 tty_rspeed((def_rspeed > 0) ? def_rspeed : 9600);
925 tty_tspeed((def_tspeed > 0) ? def_tspeed : 9600);
927 termbuf.c_cc[VERASE] = erase;
931 # endif /* LINEMODE */
934 * Set the tty modes, and make this our controlling tty.
937 if (login_tty(t) == -1)
938 fatalperror(net, "login_tty");
941 #ifdef AUTHENTICATION
942 #if defined(NO_LOGIN_F) && defined(LOGIN_R)
944 * Leave the pty open so that we can write out the rlogin
945 * protocol for /bin/login, if the authentication works.
953 #endif /* AUTHENTICATION */
960 * Open the specified slave side of the pty,
961 * making sure that we have a clean tty.
969 * Make sure that other people can't open the
970 * slave side of the connection.
972 (void) chown(li, 0, 0);
973 (void) chmod(li, 0600);
977 t = open(line, O_RDWR|O_NOCTTY);
988 * Given a hostname, do whatever
989 * is necessary to startup the login process on the slave side of the pty.
994 startslave(char *host, int autologin, char *autoname)
998 #ifdef AUTHENTICATION
999 if (!autoname || !autoname[0])
1002 if (autologin < auth_level) {
1003 fatal(net, "Authorization failed");
1009 if ((i = fork()) < 0)
1010 fatalperror(net, "fork");
1014 start_login(host, autologin, autoname);
1025 if ((*envp = getenv("TZ")))
1035 * Assuming that we are now running as a child processes, this
1036 * function will turn us into the login process.
1039 #ifndef AUTHENTICATION
1040 #define undef1 __unused
1046 start_login(char *host undef1, int autologin undef1, char *name undef1)
1053 * -h : pass on name of host.
1054 * WARNING: -h is accepted by login if and only if
1056 * -p : don't clobber the environment (so terminal type stays set).
1058 * -f : force this login, he has already been authenticated
1060 argv = addarg(0, "login");
1062 #if !defined(NO_LOGIN_H)
1063 #ifdef AUTHENTICATION
1064 # if defined(NO_LOGIN_F) && defined(LOGIN_R)
1066 * Don't add the "-h host" option if we are going
1067 * to be adding the "-r host" option down below...
1069 if ((auth_level < 0) || (autologin != AUTH_VALID))
1072 argv = addarg(argv, "-h");
1073 argv = addarg(argv, host);
1075 #endif /* AUTHENTICATION */
1077 #if !defined(NO_LOGIN_P)
1078 argv = addarg(argv, "-p");
1082 * Set the environment variable "LINEMODE" to either
1083 * "real" or "kludge" if we are operating in either
1084 * real or kludge linemode.
1086 if (lmodetype == REAL_LINEMODE) {
1087 if (setenv("LINEMODE", "real", 1) == -1)
1088 syslog(LOG_ERR, "setenv: cannot set LINEMODE=real: %m");
1090 # ifdef KLUDGELINEMODE
1091 else if (lmodetype == KLUDGE_LINEMODE || lmodetype == KLUDGE_OK) {
1092 if (setenv("LINEMODE", "kludge", 1) == -1)
1093 syslog(LOG_ERR, "setenv: cannot set LINEMODE=kludge: %m");
1099 * Are we working as the bftp daemon? If so, then ask login
1100 * to start bftp instead of shell.
1103 argv = addarg(argv, "-e");
1104 argv = addarg(argv, BFTPPATH);
1107 #ifdef AUTHENTICATION
1108 if (auth_level >= 0 && autologin == AUTH_VALID) {
1109 # if !defined(NO_LOGIN_F)
1110 argv = addarg(argv, "-f");
1111 argv = addarg(argv, "--");
1112 argv = addarg(argv, name);
1114 # if defined(LOGIN_R)
1116 * We don't have support for "login -f", but we
1117 * can fool /bin/login into thinking that we are
1118 * rlogind, and allow us to log in without a
1119 * password. The rlogin protocol expects
1120 * local-user\0remote-user\0term/speed\0
1126 int isecho, israw, xpty, len;
1127 extern int def_rspeed;
1130 * Tell login that we are coming from "localhost".
1131 * If we passed in the real host name, then the
1132 * user would have to allow .rhost access from
1133 * every machine that they want authenticated
1134 * access to work from, which sort of defeats
1135 * the purpose of an authenticated login...
1136 * So, we tell login that the session is coming
1137 * from "localhost", and the user will only have
1138 * to have "localhost" in their .rhost file.
1140 # define LOGIN_HOST "localhost"
1142 argv = addarg(argv, "-r");
1143 argv = addarg(argv, LOGIN_HOST);
1148 isecho = tty_isecho();
1149 israw = tty_israw();
1150 if (isecho || !israw) {
1151 tty_setecho(0); /* Turn off echo */
1152 tty_setraw(1); /* Turn on raw */
1155 len = strlen(name)+1;
1156 write(xpty, name, len);
1157 write(xpty, name, len);
1158 snprintf(speed, sizeof(speed),
1159 "%s/%d", (cp = getenv("TERM")) ? cp : "",
1160 (def_rspeed > 0) ? def_rspeed : 9600);
1161 len = strlen(speed)+1;
1162 write(xpty, speed, len);
1164 if (isecho || !israw) {
1166 tty_setecho(isecho);
1171 * Write a newline to ensure
1172 * that login will be able to
1175 write(xpty, "\n", 1);
1181 argv = addarg(argv, "--");
1182 argv = addarg(argv, name);
1187 if (getenv("USER")) {
1188 argv = addarg(argv, "--");
1189 argv = addarg(argv, getenv("USER"));
1190 #if defined(LOGIN_ARGS) && defined(NO_LOGIN_P)
1193 for (cpp = environ; *cpp; cpp++)
1194 argv = addarg(argv, *cpp);
1198 * Assume that login will set the USER variable
1199 * correctly. For SysV systems, this means that
1200 * USER will no longer be set, just LOGNAME by
1201 * login. (The problem is that if the auto-login
1202 * fails, and the user then specifies a different
1203 * account name, he can get logged in with both
1204 * LOGNAME and USER in his environment, but the
1205 * USER value will be wrong.
1209 #ifdef AUTHENTICATION
1210 #if defined(NO_LOGIN_F) && defined(LOGIN_R)
1214 #endif /* AUTHENTICATION */
1217 if (altlogin == NULL) {
1218 altlogin = _PATH_LOGIN;
1220 execv(altlogin, argv);
1222 syslog(LOG_ERR, "%s: %m", altlogin);
1223 fatalperror(net, altlogin);
1228 addarg(char **argv, const char *val)
1234 * 10 entries, a leading length, and a null
1236 argv = (char **)malloc(sizeof(*argv) * 12);
1239 *argv++ = (char *)10;
1242 for (cpp = argv; *cpp; cpp++)
1244 if (cpp == &argv[(long)argv[-1]]) {
1246 *argv = (char *)((long)(*argv) + 10);
1247 argv = (char **)realloc(argv, sizeof(*argv)*((long)(*argv) + 2));
1251 cpp = &argv[(long)argv[-1] - 10];
1253 *cpp++ = strdup(val);
1261 * We only accept the environment variables listed below.
1266 static const char *rej[] = {
1271 static const char *acc[] = {
1272 "XAUTH=", "XAUTHORITY=", "DISPLAY=",
1284 char ** new_environ;
1287 /* Allocate space for scrubbed environment. */
1288 for (count = 1, cpp = environ; *cpp; count++, cpp++)
1290 if ((new_environ = malloc(count * sizeof(char *))) == NULL) {
1295 for (cpp2 = new_environ, cpp = environ; *cpp; cpp++) {
1298 for(p = rej; *p; p++)
1299 if(strncmp(*cpp, *p, strlen(*p)) == 0) {
1306 for(p = acc; *p; p++)
1307 if(strncmp(*cpp, *p, strlen(*p)) == 0)
1310 if ((*cpp2++ = strdup(*cpp)) == NULL) {
1311 environ = new_environ;
1317 environ = new_environ;
1323 * This is the routine to call when we are all through, to
1324 * clean up anything that needs to be cleaned up.
1328 cleanup(int sig __unused)
1333 p = line + sizeof(_PATH_DEV) - 1;
1335 * Block all signals before clearing the utmp entry. We don't want to
1336 * be called again after calling logout() and then not add the wtmp
1337 * entry because of not finding the corresponding entry in utmp.
1340 sigprocmask(SIG_SETMASK, &mask, NULL);
1343 (void)chmod(line, 0666);
1344 (void)chown(line, 0, 0);
1346 (void)chmod(line, 0666);
1347 (void)chown(line, 0, 0);
1348 (void) shutdown(net, SHUT_RDWR);