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
36 static const char sccsid[] = "@(#)sys_term.c 8.4+1 (Berkeley) 5/30/95";
39 #include <sys/cdefs.h>
40 __FBSDID("$FreeBSD$");
42 #include <sys/types.h>
49 #include "pathnames.h"
52 #include <libtelnet/auth.h>
55 int cleanopen(char *);
61 char wtmpf[] = _PATH_WTMP;
63 char wtmpf[] = "/var/log/wtmp";
66 char utmpf[] = _PATH_UTMP;
68 char utmpf[] = "/var/run/utmp";
72 extern char **environ;
74 #define SCPYN(a, b) (void) strncpy(a, b, sizeof(a))
75 #define SCMPN(a, b) strncmp(a, b, sizeof(a))
102 # define cfsetospeed(tp, val) (tp)->sg.sg_ospeed = (val)
103 # define cfsetispeed(tp, val) (tp)->sg.sg_ispeed = (val)
104 # define cfgetospeed(tp) (tp)->sg.sg_ospeed
105 # define cfgetispeed(tp) (tp)->sg.sg_ispeed
106 #else /* USE_TERMIO */
109 # define TCSANOW TCSETS
110 # define TCSADRAIN TCSETSW
111 # define tcgetattr(f, t) ioctl(f, TCGETS, (char *)t)
114 # define TCSANOW TCSETA
115 # define TCSADRAIN TCSETAW
116 # define tcgetattr(f, t) ioctl(f, TCGETA, (char *)t)
118 # define TCSANOW TIOCSETA
119 # define TCSADRAIN TIOCSETAW
120 # define tcgetattr(f, t) ioctl(f, TIOCGETA, (char *)t)
123 # define tcsetattr(f, a, t) ioctl(f, a, t)
124 # define cfsetospeed(tp, val) (tp)->c_cflag &= ~CBAUD; \
125 (tp)->c_cflag |= (val)
126 # define cfgetospeed(tp) ((tp)->c_cflag & CBAUD)
128 # define cfsetispeed(tp, val) (tp)->c_cflag &= ~CIBAUD; \
129 (tp)->c_cflag |= ((val)<<IBSHIFT)
130 # define cfgetispeed(tp) (((tp)->c_cflag & CIBAUD)>>IBSHIFT)
132 # define cfsetispeed(tp, val) (tp)->c_cflag &= ~CBAUD; \
133 (tp)->c_cflag |= (val)
134 # define cfgetispeed(tp) ((tp)->c_cflag & CBAUD)
136 # endif /* TCSANOW */
137 struct termios termbuf, termbuf2; /* pty control structure */
138 #endif /* USE_TERMIO */
140 #include <sys/types.h>
143 int cleanopen(char *);
144 void scrub_env(void);
145 static char **addarg(char **, const char *);
152 * These three routines are used to get and set the "termbuf" structure
153 * to and from the kernel. init_termbuf() gets the current settings.
154 * copy_termbuf() hands in a new "termbuf" to write to the kernel, and
155 * set_termbuf() writes the structure into the kernel.
162 (void) ioctl(pty, TIOCGETP, (char *)&termbuf.sg);
163 (void) ioctl(pty, TIOCGETC, (char *)&termbuf.tc);
164 (void) ioctl(pty, TIOCGLTC, (char *)&termbuf.ltc);
166 (void) ioctl(pty, TIOCGSTATE, (char *)&termbuf.state);
169 (void) tcgetattr(pty, &termbuf);
174 #if defined(LINEMODE) && defined(TIOCPKT_IOCTL)
176 copy_termbuf(char *cp, size_t len)
178 if (len > sizeof(termbuf))
179 len = sizeof(termbuf);
180 memmove((char *)&termbuf, cp, len);
183 #endif /* defined(LINEMODE) && defined(TIOCPKT_IOCTL) */
189 * Only make the necessary changes.
192 if (memcmp((char *)&termbuf.sg, (char *)&termbuf2.sg,
194 (void) ioctl(pty, TIOCSETN, (char *)&termbuf.sg);
195 if (memcmp((char *)&termbuf.tc, (char *)&termbuf2.tc,
197 (void) ioctl(pty, TIOCSETC, (char *)&termbuf.tc);
198 if (memcmp((char *)&termbuf.ltc, (char *)&termbuf2.ltc,
199 sizeof(termbuf.ltc)))
200 (void) ioctl(pty, TIOCSLTC, (char *)&termbuf.ltc);
201 if (termbuf.lflags != termbuf2.lflags)
202 (void) ioctl(pty, TIOCLSET, (char *)&termbuf.lflags);
203 #else /* USE_TERMIO */
204 if (memcmp((char *)&termbuf, (char *)&termbuf2, sizeof(termbuf)))
205 (void) tcsetattr(pty, TCSANOW, &termbuf);
206 #endif /* USE_TERMIO */
211 * spcset(func, valp, valpp)
213 * This function takes various special characters (func), and
214 * sets *valp to the current value of that character, and
215 * *valpp to point to where in the "termbuf" structure that
218 * It returns the SLC_ level of support for this function.
223 spcset(int func, cc_t *valp, cc_t **valpp)
227 *valp = termbuf.tc.t_eofc;
228 *valpp = (cc_t *)&termbuf.tc.t_eofc;
229 return(SLC_VARIABLE);
231 *valp = termbuf.sg.sg_erase;
232 *valpp = (cc_t *)&termbuf.sg.sg_erase;
233 return(SLC_VARIABLE);
235 *valp = termbuf.sg.sg_kill;
236 *valpp = (cc_t *)&termbuf.sg.sg_kill;
237 return(SLC_VARIABLE);
239 *valp = termbuf.tc.t_intrc;
240 *valpp = (cc_t *)&termbuf.tc.t_intrc;
241 return(SLC_VARIABLE|SLC_FLUSHIN|SLC_FLUSHOUT);
243 *valp = termbuf.tc.t_quitc;
244 *valpp = (cc_t *)&termbuf.tc.t_quitc;
245 return(SLC_VARIABLE|SLC_FLUSHIN|SLC_FLUSHOUT);
247 *valp = termbuf.tc.t_startc;
248 *valpp = (cc_t *)&termbuf.tc.t_startc;
249 return(SLC_VARIABLE);
251 *valp = termbuf.tc.t_stopc;
252 *valpp = (cc_t *)&termbuf.tc.t_stopc;
253 return(SLC_VARIABLE);
255 *valp = termbuf.ltc.t_flushc;
256 *valpp = (cc_t *)&termbuf.ltc.t_flushc;
257 return(SLC_VARIABLE);
259 *valp = termbuf.ltc.t_suspc;
260 *valpp = (cc_t *)&termbuf.ltc.t_suspc;
261 return(SLC_VARIABLE);
263 *valp = termbuf.ltc.t_werasc;
264 *valpp = (cc_t *)&termbuf.ltc.t_werasc;
265 return(SLC_VARIABLE);
267 *valp = termbuf.ltc.t_rprntc;
268 *valpp = (cc_t *)&termbuf.ltc.t_rprntc;
269 return(SLC_VARIABLE);
271 *valp = termbuf.ltc.t_lnextc;
272 *valpp = (cc_t *)&termbuf.ltc.t_lnextc;
273 return(SLC_VARIABLE);
275 *valp = termbuf.tc.t_brkc;
276 *valpp = (cc_t *)&termbuf.ltc.t_lnextc;
277 return(SLC_VARIABLE);
288 return(SLC_NOSUPPORT);
292 #else /* USE_TERMIO */
295 #define setval(a, b) *valp = termbuf.c_cc[a]; \
296 *valpp = &termbuf.c_cc[a]; \
298 #define defval(a) *valp = ((cc_t)a); *valpp = (cc_t *)0; return(SLC_DEFAULT);
301 spcset(int func, cc_t *valp, cc_t **valpp)
305 setval(VEOF, SLC_VARIABLE);
307 setval(VERASE, SLC_VARIABLE);
309 setval(VKILL, SLC_VARIABLE);
311 setval(VINTR, SLC_VARIABLE|SLC_FLUSHIN|SLC_FLUSHOUT);
313 setval(VQUIT, SLC_VARIABLE|SLC_FLUSHIN|SLC_FLUSHOUT);
316 setval(VSTART, SLC_VARIABLE);
322 setval(VSTOP, SLC_VARIABLE);
328 setval(VWERASE, SLC_VARIABLE);
334 setval(VREPRINT, SLC_VARIABLE);
340 setval(VLNEXT, SLC_VARIABLE);
345 #if !defined(VDISCARD) && defined(VFLUSHO)
346 # define VDISCARD VFLUSHO
349 setval(VDISCARD, SLC_VARIABLE|SLC_FLUSHOUT);
355 setval(VSUSP, SLC_VARIABLE|SLC_FLUSHIN);
361 setval(VEOL, SLC_VARIABLE);
365 setval(VEOL2, SLC_VARIABLE);
369 setval(VSTATUS, SLC_VARIABLE);
382 return(SLC_NOSUPPORT);
385 #endif /* USE_TERMIO */
390 * Allocate a pty. As a side effect, the external character
391 * array "line" contains the name of the slave side.
393 * Returns the file descriptor of the opened pty.
398 getpty(int *ptynum __unused)
403 p = posix_openpt(O_RDWR|O_NOCTTY);
407 if (grantpt(p) == -1)
410 if (unlockpt(p) == -1)
417 if (strlcpy(line, pn, sizeof line) >= sizeof line)
425 * tty_flowmode() Find out if flow control is enabled or disabled.
426 * tty_linemode() Find out if linemode (external processing) is enabled.
427 * tty_setlinemod(on) Turn on/off linemode.
428 * tty_isecho() Find out if echoing is turned on.
429 * tty_setecho(on) Enable/disable character echoing.
430 * tty_israw() Find out if terminal is in RAW mode.
431 * tty_binaryin(on) Turn on/off BINARY on input.
432 * tty_binaryout(on) Turn on/off BINARY on output.
433 * tty_isediting() Find out if line editing is enabled.
434 * tty_istrapsig() Find out if signal trapping is enabled.
435 * tty_setedit(on) Turn on/off line editing.
436 * tty_setsig(on) Turn on/off signal trapping.
437 * tty_issofttab() Find out if tab expansion is enabled.
438 * tty_setsofttab(on) Turn on/off soft tab expansion.
439 * tty_islitecho() Find out if typed control chars are echoed literally
440 * tty_setlitecho() Turn on/off literal echo of control chars
441 * tty_tspeed(val) Set transmit speed to val.
442 * tty_rspeed(val) Set receive speed to val.
450 return(termbuf.state & TS_EXTPROC);
452 return(termbuf.c_lflag & EXTPROC);
457 tty_setlinemode(int on)
461 (void) ioctl(pty, TIOCEXT, (char *)&on);
466 termbuf.c_lflag |= EXTPROC;
468 termbuf.c_lflag &= ~EXTPROC;
472 #endif /* LINEMODE */
478 return (termbuf.sg.sg_flags & ECHO);
480 return (termbuf.c_lflag & ECHO);
488 return(((termbuf.tc.t_startc) > 0 && (termbuf.tc.t_stopc) > 0) ? 1 : 0);
490 return((termbuf.c_iflag & IXON) ? 1 : 0);
499 return((termbuf.lflags & DECCTQ) ? 0 : 1);
504 return((termbuf.c_iflag & IXANY) ? 1 : 0);
513 termbuf.sg.sg_flags |= ECHO|CRMOD;
515 termbuf.sg.sg_flags &= ~(ECHO|CRMOD);
518 termbuf.c_lflag |= ECHO;
520 termbuf.c_lflag &= ~ECHO;
528 return(termbuf.sg.sg_flags & RAW);
530 return(!(termbuf.c_lflag & ICANON));
534 #ifdef AUTHENTICATION
535 #if defined(NO_LOGIN_F) && defined(LOGIN_R)
541 termbuf.sg.sg_flags |= RAW;
543 termbuf.sg.sg_flags &= ~RAW;
546 termbuf.c_lflag &= ~ICANON;
548 termbuf.c_lflag |= ICANON;
552 #endif /* AUTHENTICATION */
559 termbuf.lflags |= LPASS8;
561 termbuf.lflags &= ~LPASS8;
564 termbuf.c_iflag &= ~ISTRIP;
566 termbuf.c_iflag |= ISTRIP;
572 tty_binaryout(int on)
576 termbuf.lflags |= LLITOUT;
578 termbuf.lflags &= ~LLITOUT;
581 termbuf.c_cflag &= ~(CSIZE|PARENB);
582 termbuf.c_cflag |= CS8;
583 termbuf.c_oflag &= ~OPOST;
585 termbuf.c_cflag &= ~CSIZE;
586 termbuf.c_cflag |= CS7|PARENB;
587 termbuf.c_oflag |= OPOST;
596 return(termbuf.lflags & LPASS8);
598 return(!(termbuf.c_iflag & ISTRIP));
603 tty_isbinaryout(void)
606 return(termbuf.lflags & LLITOUT);
608 return(!(termbuf.c_oflag&OPOST));
617 return(!(termbuf.sg.sg_flags & (CBREAK|RAW)));
619 return(termbuf.c_lflag & ICANON);
627 return(!(termbuf.sg.sg_flags&RAW));
629 return(termbuf.c_lflag & ISIG);
638 termbuf.sg.sg_flags &= ~CBREAK;
640 termbuf.sg.sg_flags |= CBREAK;
643 termbuf.c_lflag |= ICANON;
645 termbuf.c_lflag &= ~ICANON;
657 termbuf.c_lflag |= ISIG;
659 termbuf.c_lflag &= ~ISIG;
662 #endif /* LINEMODE */
668 return (termbuf.sg.sg_flags & XTABS);
671 return (termbuf.c_oflag & OXTABS);
674 return ((termbuf.c_oflag & TABDLY) == TAB3);
680 tty_setsofttab(int on)
684 termbuf.sg.sg_flags |= XTABS;
686 termbuf.sg.sg_flags &= ~XTABS;
690 termbuf.c_oflag |= OXTABS;
693 termbuf.c_oflag &= ~TABDLY;
694 termbuf.c_oflag |= TAB3;
698 termbuf.c_oflag &= ~OXTABS;
701 termbuf.c_oflag &= ~TABDLY;
702 termbuf.c_oflag |= TAB0;
712 return (!(termbuf.lflags & LCTLECH));
715 return (!(termbuf.c_lflag & ECHOCTL));
718 return (!(termbuf.c_lflag & TCTLECH));
720 # if !defined(ECHOCTL) && !defined(TCTLECH)
721 return (0); /* assumes ctl chars are echoed '^x' */
727 tty_setlitecho(int on)
731 termbuf.lflags &= ~LCTLECH;
733 termbuf.lflags |= LCTLECH;
737 termbuf.c_lflag &= ~ECHOCTL;
739 termbuf.c_lflag |= ECHOCTL;
743 termbuf.c_lflag &= ~TCTLECH;
745 termbuf.c_lflag |= TCTLECH;
754 return (termbuf.sg.sg_flags & CRMOD);
756 return (termbuf.c_iflag & ICRNL);
761 * Try to guess whether speeds are "encoded" (4.2BSD) or just numeric (4.4BSD).
770 * A table of available terminal speeds
776 { 0, B0 }, { 50, B50 }, { 75, B75 },
777 { 110, B110 }, { 134, B134 }, { 150, B150 },
778 { 200, B200 }, { 300, B300 }, { 600, B600 },
779 { 1200, B1200 }, { 1800, B1800 }, { 2400, B2400 },
808 #endif /* DECODE_BAUD */
814 struct termspeeds *tp;
816 for (tp = termspeeds; (tp->speed != -1) && (val > tp->speed); tp++)
818 if (tp->speed == -1) /* back up to last valid value */
820 cfsetospeed(&termbuf, tp->value);
821 #else /* DECODE_BAUD */
822 cfsetospeed(&termbuf, val);
823 #endif /* DECODE_BAUD */
830 struct termspeeds *tp;
832 for (tp = termspeeds; (tp->speed != -1) && (val > tp->speed); tp++)
834 if (tp->speed == -1) /* back up to last valid value */
836 cfsetispeed(&termbuf, tp->value);
837 #else /* DECODE_BAUD */
838 cfsetispeed(&termbuf, val);
839 #endif /* DECODE_BAUD */
845 * Open the slave side of the pty, and do any initialization
859 extern int def_row, def_col;
861 extern int def_tspeed, def_rspeed;
863 * Opening the slave side may cause initilization of the
864 * kernel tty structure. We need remember the state of
865 * if linemode was turned on
866 * terminal window size
869 * so that we can re-set them if we need to.
872 waslm = tty_linemode();
874 erase = termbuf.c_cc[VERASE];
877 * Make sure that we don't have a controlling tty, and
878 * that we are the session (process group) leader.
881 t = open(_PATH_TTY, O_RDWR);
883 (void) ioctl(t, TIOCNOTTY, (char *)0);
890 fatalperror(net, line);
894 * set up the tty modes as we like them to be.
898 if (def_row || def_col) {
899 memset((char *)&ws, 0, sizeof(ws));
902 (void)ioctl(t, TIOCSWINSZ, (char *)&ws);
907 * Settings for sgtty based systems
910 termbuf.sg.sg_flags |= CRMOD|ANYP|ECHO|XTABS;
911 # endif /* USE_TERMIO */
914 * Settings for all other termios/termio based
915 * systems, other than 4.4BSD. In 4.4BSD the
916 * kernel does the initial terminal setup.
918 tty_rspeed((def_rspeed > 0) ? def_rspeed : 9600);
919 tty_tspeed((def_tspeed > 0) ? def_tspeed : 9600);
921 termbuf.c_cc[VERASE] = erase;
925 # endif /* LINEMODE */
928 * Set the tty modes, and make this our controlling tty.
931 if (login_tty(t) == -1)
932 fatalperror(net, "login_tty");
935 #ifdef AUTHENTICATION
936 #if defined(NO_LOGIN_F) && defined(LOGIN_R)
938 * Leave the pty open so that we can write out the rlogin
939 * protocol for /bin/login, if the authentication works.
947 #endif /* AUTHENTICATION */
954 * Open the specified slave side of the pty,
955 * making sure that we have a clean tty.
963 * Make sure that other people can't open the
964 * slave side of the connection.
966 (void) chown(li, 0, 0);
967 (void) chmod(li, 0600);
971 t = open(line, O_RDWR|O_NOCTTY);
982 * Given a hostname, do whatever
983 * is necessary to startup the login process on the slave side of the pty.
988 startslave(char *host, int autologin, char *autoname)
992 #ifdef AUTHENTICATION
993 if (!autoname || !autoname[0])
996 if (autologin < auth_level) {
997 fatal(net, "Authorization failed");
1003 if ((i = fork()) < 0)
1004 fatalperror(net, "fork");
1008 start_login(host, autologin, autoname);
1019 if ((*envp = getenv("TZ")))
1029 * Assuming that we are now running as a child processes, this
1030 * function will turn us into the login process.
1033 #ifndef AUTHENTICATION
1034 #define undef1 __unused
1040 start_login(char *host undef1, int autologin undef1, char *name undef1)
1047 * -h : pass on name of host.
1048 * WARNING: -h is accepted by login if and only if
1050 * -p : don't clobber the environment (so terminal type stays set).
1052 * -f : force this login, he has already been authenticated
1054 argv = addarg(0, "login");
1056 #if !defined(NO_LOGIN_H)
1057 #ifdef AUTHENTICATION
1058 # if defined(NO_LOGIN_F) && defined(LOGIN_R)
1060 * Don't add the "-h host" option if we are going
1061 * to be adding the "-r host" option down below...
1063 if ((auth_level < 0) || (autologin != AUTH_VALID))
1066 argv = addarg(argv, "-h");
1067 argv = addarg(argv, host);
1069 #endif /* AUTHENTICATION */
1071 #if !defined(NO_LOGIN_P)
1072 argv = addarg(argv, "-p");
1076 * Set the environment variable "LINEMODE" to either
1077 * "real" or "kludge" if we are operating in either
1078 * real or kludge linemode.
1080 if (lmodetype == REAL_LINEMODE)
1081 setenv("LINEMODE", "real", 1);
1082 # ifdef KLUDGELINEMODE
1083 else if (lmodetype == KLUDGE_LINEMODE || lmodetype == KLUDGE_OK)
1084 setenv("LINEMODE", "kludge", 1);
1089 * Are we working as the bftp daemon? If so, then ask login
1090 * to start bftp instead of shell.
1093 argv = addarg(argv, "-e");
1094 argv = addarg(argv, BFTPPATH);
1097 #ifdef AUTHENTICATION
1098 if (auth_level >= 0 && autologin == AUTH_VALID) {
1099 # if !defined(NO_LOGIN_F)
1100 argv = addarg(argv, "-f");
1101 argv = addarg(argv, "--");
1102 argv = addarg(argv, name);
1104 # if defined(LOGIN_R)
1106 * We don't have support for "login -f", but we
1107 * can fool /bin/login into thinking that we are
1108 * rlogind, and allow us to log in without a
1109 * password. The rlogin protocol expects
1110 * local-user\0remote-user\0term/speed\0
1116 int isecho, israw, xpty, len;
1117 extern int def_rspeed;
1120 * Tell login that we are coming from "localhost".
1121 * If we passed in the real host name, then the
1122 * user would have to allow .rhost access from
1123 * every machine that they want authenticated
1124 * access to work from, which sort of defeats
1125 * the purpose of an authenticated login...
1126 * So, we tell login that the session is coming
1127 * from "localhost", and the user will only have
1128 * to have "localhost" in their .rhost file.
1130 # define LOGIN_HOST "localhost"
1132 argv = addarg(argv, "-r");
1133 argv = addarg(argv, LOGIN_HOST);
1138 isecho = tty_isecho();
1139 israw = tty_israw();
1140 if (isecho || !israw) {
1141 tty_setecho(0); /* Turn off echo */
1142 tty_setraw(1); /* Turn on raw */
1145 len = strlen(name)+1;
1146 write(xpty, name, len);
1147 write(xpty, name, len);
1148 snprintf(speed, sizeof(speed),
1149 "%s/%d", (cp = getenv("TERM")) ? cp : "",
1150 (def_rspeed > 0) ? def_rspeed : 9600);
1151 len = strlen(speed)+1;
1152 write(xpty, speed, len);
1154 if (isecho || !israw) {
1156 tty_setecho(isecho);
1161 * Write a newline to ensure
1162 * that login will be able to
1165 write(xpty, "\n", 1);
1171 argv = addarg(argv, "--");
1172 argv = addarg(argv, name);
1177 if (getenv("USER")) {
1178 argv = addarg(argv, "--");
1179 argv = addarg(argv, getenv("USER"));
1180 #if defined(LOGIN_ARGS) && defined(NO_LOGIN_P)
1183 for (cpp = environ; *cpp; cpp++)
1184 argv = addarg(argv, *cpp);
1188 * Assume that login will set the USER variable
1189 * correctly. For SysV systems, this means that
1190 * USER will no longer be set, just LOGNAME by
1191 * login. (The problem is that if the auto-login
1192 * fails, and the user then specifies a different
1193 * account name, he can get logged in with both
1194 * LOGNAME and USER in his environment, but the
1195 * USER value will be wrong.
1199 #ifdef AUTHENTICATION
1200 #if defined(NO_LOGIN_F) && defined(LOGIN_R)
1204 #endif /* AUTHENTICATION */
1207 if (altlogin == NULL) {
1208 altlogin = _PATH_LOGIN;
1210 execv(altlogin, argv);
1212 syslog(LOG_ERR, "%s: %m", altlogin);
1213 fatalperror(net, altlogin);
1218 addarg(char **argv, const char *val)
1224 * 10 entries, a leading length, and a null
1226 argv = (char **)malloc(sizeof(*argv) * 12);
1229 *argv++ = (char *)10;
1232 for (cpp = argv; *cpp; cpp++)
1234 if (cpp == &argv[(long)argv[-1]]) {
1236 *argv = (char *)((long)(*argv) + 10);
1237 argv = (char **)realloc(argv, sizeof(*argv)*((long)(*argv) + 2));
1241 cpp = &argv[(long)argv[-1] - 10];
1243 *cpp++ = strdup(val);
1251 * We only accept the environment variables listed below.
1256 static const char *rej[] = {
1261 static const char *acc[] = {
1262 "XAUTH=", "XAUTHORITY=", "DISPLAY=",
1274 char ** new_environ;
1277 /* Allocate space for scrubbed environment. */
1278 for (count = 1, cpp = environ; *cpp; count++, cpp++)
1280 if ((new_environ = malloc(count * sizeof(char *))) == NULL) {
1285 for (cpp2 = new_environ, cpp = environ; *cpp; cpp++) {
1288 for(p = rej; *p; p++)
1289 if(strncmp(*cpp, *p, strlen(*p)) == 0) {
1296 for(p = acc; *p; p++)
1297 if(strncmp(*cpp, *p, strlen(*p)) == 0)
1300 if ((*cpp2++ = strdup(*cpp)) == NULL) {
1301 environ = new_environ;
1307 environ = new_environ;
1313 * This is the routine to call when we are all through, to
1314 * clean up anything that needs to be cleaned up.
1318 cleanup(int sig __unused)
1323 p = line + sizeof(_PATH_DEV) - 1;
1325 * Block all signals before clearing the utmp entry. We don't want to
1326 * be called again after calling logout() and then not add the wtmp
1327 * entry because of not finding the corresponding entry in utmp.
1330 sigprocmask(SIG_SETMASK, &mask, NULL);
1333 (void)chmod(line, 0666);
1334 (void)chown(line, 0, 0);
1336 (void)chmod(line, 0666);
1337 (void)chown(line, 0, 0);
1338 (void) shutdown(net, 2);