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. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * @(#)sys_term.c 8.4+1 (Berkeley) 5/30/95
30 * $FreeBSD: src/crypto/telnet/telnetd/sys_term.c,v 1.7.2.5 2002/06/17 02:48:02 jmallett Exp $
33 #include <sys/types.h>
40 #include "pathnames.h"
43 #include <libtelnet/auth.h>
44 extern int auth_level
;
47 int cleanopen(char *);
51 extern char **environ
;
53 #define SCPYN(a, b) (void) strncpy(a, b, sizeof(a))
54 #define SCMPN(a, b) strncmp(a, b, sizeof(a))
81 # define cfsetospeed(tp, val) (tp)->sg.sg_ospeed = (val)
82 # define cfsetispeed(tp, val) (tp)->sg.sg_ispeed = (val)
83 # define cfgetospeed(tp) (tp)->sg.sg_ospeed
84 # define cfgetispeed(tp) (tp)->sg.sg_ispeed
85 #else /* USE_TERMIO */
88 # define TCSANOW TCSETS
89 # define TCSADRAIN TCSETSW
90 # define tcgetattr(f, t) ioctl(f, TCGETS, (char *)t)
93 # define TCSANOW TCSETA
94 # define TCSADRAIN TCSETAW
95 # define tcgetattr(f, t) ioctl(f, TCGETA, (char *)t)
97 # define TCSANOW TIOCSETA
98 # define TCSADRAIN TIOCSETAW
99 # define tcgetattr(f, t) ioctl(f, TIOCGETA, (char *)t)
102 # define tcsetattr(f, a, t) ioctl(f, a, t)
103 # define cfsetospeed(tp, val) (tp)->c_cflag &= ~CBAUD; \
104 (tp)->c_cflag |= (val)
105 # define cfgetospeed(tp) ((tp)->c_cflag & CBAUD)
107 # define cfsetispeed(tp, val) (tp)->c_cflag &= ~CIBAUD; \
108 (tp)->c_cflag |= ((val)<<IBSHIFT)
109 # define cfgetispeed(tp) (((tp)->c_cflag & CIBAUD)>>IBSHIFT)
111 # define cfsetispeed(tp, val) (tp)->c_cflag &= ~CBAUD; \
112 (tp)->c_cflag |= (val)
113 # define cfgetispeed(tp) ((tp)->c_cflag & CBAUD)
115 # endif /* TCSANOW */
116 struct termios termbuf
, termbuf2
; /* pty control structure */
117 #endif /* USE_TERMIO */
119 int cleanopen(char *);
120 void scrub_env(void);
121 static char **addarg(char **, const char *);
128 * These three routines are used to get and set the "termbuf" structure
129 * to and from the kernel. init_termbuf() gets the current settings.
130 * copy_termbuf() hands in a new "termbuf" to write to the kernel, and
131 * set_termbuf() writes the structure into the kernel.
138 (void) ioctl(pty
, TIOCGETP
, (char *)&termbuf
.sg
);
139 (void) ioctl(pty
, TIOCGETC
, (char *)&termbuf
.tc
);
140 (void) ioctl(pty
, TIOCGLTC
, (char *)&termbuf
.ltc
);
142 (void) ioctl(pty
, TIOCGSTATE
, (char *)&termbuf
.state
);
145 (void) tcgetattr(pty
, &termbuf
);
150 #if defined(LINEMODE) && defined(TIOCPKT_IOCTL)
152 copy_termbuf(char *cp
, size_t len
)
154 if (len
> sizeof(termbuf
))
155 len
= sizeof(termbuf
);
156 memmove((char *)&termbuf
, cp
, len
);
159 #endif /* defined(LINEMODE) && defined(TIOCPKT_IOCTL) */
165 * Only make the necessary changes.
168 if (memcmp((char *)&termbuf
.sg
, (char *)&termbuf2
.sg
,
170 (void) ioctl(pty
, TIOCSETN
, (char *)&termbuf
.sg
);
171 if (memcmp((char *)&termbuf
.tc
, (char *)&termbuf2
.tc
,
173 (void) ioctl(pty
, TIOCSETC
, (char *)&termbuf
.tc
);
174 if (memcmp((char *)&termbuf
.ltc
, (char *)&termbuf2
.ltc
,
175 sizeof(termbuf
.ltc
)))
176 (void) ioctl(pty
, TIOCSLTC
, (char *)&termbuf
.ltc
);
177 if (termbuf
.lflags
!= termbuf2
.lflags
)
178 (void) ioctl(pty
, TIOCLSET
, (char *)&termbuf
.lflags
);
179 #else /* USE_TERMIO */
180 if (memcmp((char *)&termbuf
, (char *)&termbuf2
, sizeof(termbuf
)))
181 (void) tcsetattr(pty
, TCSANOW
, &termbuf
);
182 #endif /* USE_TERMIO */
187 * spcset(func, valp, valpp)
189 * This function takes various special characters (func), and
190 * sets *valp to the current value of that character, and
191 * *valpp to point to where in the "termbuf" structure that
194 * It returns the SLC_ level of support for this function.
199 spcset(int func
, cc_t
*valp
, cc_t
**valpp
)
203 *valp
= termbuf
.tc
.t_eofc
;
204 *valpp
= (cc_t
*)&termbuf
.tc
.t_eofc
;
205 return(SLC_VARIABLE
);
207 *valp
= termbuf
.sg
.sg_erase
;
208 *valpp
= (cc_t
*)&termbuf
.sg
.sg_erase
;
209 return(SLC_VARIABLE
);
211 *valp
= termbuf
.sg
.sg_kill
;
212 *valpp
= (cc_t
*)&termbuf
.sg
.sg_kill
;
213 return(SLC_VARIABLE
);
215 *valp
= termbuf
.tc
.t_intrc
;
216 *valpp
= (cc_t
*)&termbuf
.tc
.t_intrc
;
217 return(SLC_VARIABLE
|SLC_FLUSHIN
|SLC_FLUSHOUT
);
219 *valp
= termbuf
.tc
.t_quitc
;
220 *valpp
= (cc_t
*)&termbuf
.tc
.t_quitc
;
221 return(SLC_VARIABLE
|SLC_FLUSHIN
|SLC_FLUSHOUT
);
223 *valp
= termbuf
.tc
.t_startc
;
224 *valpp
= (cc_t
*)&termbuf
.tc
.t_startc
;
225 return(SLC_VARIABLE
);
227 *valp
= termbuf
.tc
.t_stopc
;
228 *valpp
= (cc_t
*)&termbuf
.tc
.t_stopc
;
229 return(SLC_VARIABLE
);
231 *valp
= termbuf
.ltc
.t_flushc
;
232 *valpp
= (cc_t
*)&termbuf
.ltc
.t_flushc
;
233 return(SLC_VARIABLE
);
235 *valp
= termbuf
.ltc
.t_suspc
;
236 *valpp
= (cc_t
*)&termbuf
.ltc
.t_suspc
;
237 return(SLC_VARIABLE
);
239 *valp
= termbuf
.ltc
.t_werasc
;
240 *valpp
= (cc_t
*)&termbuf
.ltc
.t_werasc
;
241 return(SLC_VARIABLE
);
243 *valp
= termbuf
.ltc
.t_rprntc
;
244 *valpp
= (cc_t
*)&termbuf
.ltc
.t_rprntc
;
245 return(SLC_VARIABLE
);
247 *valp
= termbuf
.ltc
.t_lnextc
;
248 *valpp
= (cc_t
*)&termbuf
.ltc
.t_lnextc
;
249 return(SLC_VARIABLE
);
251 *valp
= termbuf
.tc
.t_brkc
;
252 *valpp
= (cc_t
*)&termbuf
.ltc
.t_lnextc
;
253 return(SLC_VARIABLE
);
264 return(SLC_NOSUPPORT
);
268 #else /* USE_TERMIO */
271 #define setval(a, b) *valp = termbuf.c_cc[a]; \
272 *valpp = &termbuf.c_cc[a]; \
274 #define defval(a) *valp = ((cc_t)a); *valpp = NULL; return(SLC_DEFAULT);
277 spcset(int func
, cc_t
*valp
, cc_t
**valpp
)
281 setval(VEOF
, SLC_VARIABLE
);
283 setval(VERASE
, SLC_VARIABLE
);
285 setval(VKILL
, SLC_VARIABLE
);
287 setval(VINTR
, SLC_VARIABLE
|SLC_FLUSHIN
|SLC_FLUSHOUT
);
289 setval(VQUIT
, SLC_VARIABLE
|SLC_FLUSHIN
|SLC_FLUSHOUT
);
292 setval(VSTART
, SLC_VARIABLE
);
298 setval(VSTOP
, SLC_VARIABLE
);
304 setval(VWERASE
, SLC_VARIABLE
);
310 setval(VREPRINT
, SLC_VARIABLE
);
316 setval(VLNEXT
, SLC_VARIABLE
);
321 #if !defined(VDISCARD) && defined(VFLUSHO)
322 # define VDISCARD VFLUSHO
325 setval(VDISCARD
, SLC_VARIABLE
|SLC_FLUSHOUT
);
331 setval(VSUSP
, SLC_VARIABLE
|SLC_FLUSHIN
);
337 setval(VEOL
, SLC_VARIABLE
);
341 setval(VEOL2
, SLC_VARIABLE
);
345 setval(VSTATUS
, SLC_VARIABLE
);
358 return(SLC_NOSUPPORT
);
361 #endif /* USE_TERMIO */
366 * Allocate a pty. As a side effect, the external character
367 * array "line" contains the name of the slave side.
369 * Returns the file descriptor of the opened pty.
371 char alpha
[] = "0123456789abcdefghijklmnopqrstuv";
375 getpty(int *ptynum __unused
)
382 (void) strcpy(line
, _PATH_DEV
);
383 (void) strcat(line
, "ptyXX");
387 for (cp
= "pqrsPQRS"; *cp
; cp
++) {
393 * This stat() check is just to keep us from
394 * looping through all 256 combinations if there
395 * aren't that many ptys available.
397 if (stat(line
, &stb
) < 0)
399 for (i
= 0; i
< 32; i
++) {
415 * tty_flowmode() Find out if flow control is enabled or disabled.
416 * tty_linemode() Find out if linemode (external processing) is enabled.
417 * tty_setlinemod(on) Turn on/off linemode.
418 * tty_isecho() Find out if echoing is turned on.
419 * tty_setecho(on) Enable/disable character echoing.
420 * tty_israw() Find out if terminal is in RAW mode.
421 * tty_binaryin(on) Turn on/off BINARY on input.
422 * tty_binaryout(on) Turn on/off BINARY on output.
423 * tty_isediting() Find out if line editing is enabled.
424 * tty_istrapsig() Find out if signal trapping is enabled.
425 * tty_setedit(on) Turn on/off line editing.
426 * tty_setsig(on) Turn on/off signal trapping.
427 * tty_issofttab() Find out if tab expansion is enabled.
428 * tty_setsofttab(on) Turn on/off soft tab expansion.
429 * tty_islitecho() Find out if typed control chars are echoed literally
430 * tty_setlitecho() Turn on/off literal echo of control chars
431 * tty_tspeed(val) Set transmit speed to val.
432 * tty_rspeed(val) Set receive speed to val.
440 return(termbuf
.state
& TS_EXTPROC
);
442 return(termbuf
.c_lflag
& EXTPROC
);
447 tty_setlinemode(int on
)
451 (void) ioctl(pty
, TIOCEXT
, (char *)&on
);
456 termbuf
.c_lflag
|= EXTPROC
;
458 termbuf
.c_lflag
&= ~EXTPROC
;
462 #endif /* LINEMODE */
468 return (termbuf
.sg
.sg_flags
& ECHO
);
470 return (termbuf
.c_lflag
& ECHO
);
478 return(((termbuf
.tc
.t_startc
) > 0 && (termbuf
.tc
.t_stopc
) > 0) ? 1 : 0);
480 return((termbuf
.c_iflag
& IXON
) ? 1 : 0);
489 return((termbuf
.lflags
& DECCTQ
) ? 0 : 1);
494 return((termbuf
.c_iflag
& IXANY
) ? 1 : 0);
503 termbuf
.sg
.sg_flags
|= ECHO
|CRMOD
;
505 termbuf
.sg
.sg_flags
&= ~(ECHO
|CRMOD
);
508 termbuf
.c_lflag
|= ECHO
;
510 termbuf
.c_lflag
&= ~ECHO
;
518 return(termbuf
.sg
.sg_flags
& RAW
);
520 return(!(termbuf
.c_lflag
& ICANON
));
524 #ifdef AUTHENTICATION
525 #if defined(NO_LOGIN_F) && defined(LOGIN_R)
531 termbuf
.sg
.sg_flags
|= RAW
;
533 termbuf
.sg
.sg_flags
&= ~RAW
;
536 termbuf
.c_lflag
&= ~ICANON
;
538 termbuf
.c_lflag
|= ICANON
;
542 #endif /* AUTHENTICATION */
549 termbuf
.lflags
|= LPASS8
;
551 termbuf
.lflags
&= ~LPASS8
;
554 termbuf
.c_iflag
&= ~ISTRIP
;
556 termbuf
.c_iflag
|= ISTRIP
;
562 tty_binaryout(int on
)
566 termbuf
.lflags
|= LLITOUT
;
568 termbuf
.lflags
&= ~LLITOUT
;
571 termbuf
.c_cflag
&= ~(CSIZE
|PARENB
);
572 termbuf
.c_cflag
|= CS8
;
573 termbuf
.c_oflag
&= ~OPOST
;
575 termbuf
.c_cflag
&= ~CSIZE
;
576 termbuf
.c_cflag
|= CS7
|PARENB
;
577 termbuf
.c_oflag
|= OPOST
;
586 return(termbuf
.lflags
& LPASS8
);
588 return(!(termbuf
.c_iflag
& ISTRIP
));
593 tty_isbinaryout(void)
596 return(termbuf
.lflags
& LLITOUT
);
598 return(!(termbuf
.c_oflag
&OPOST
));
607 return(!(termbuf
.sg
.sg_flags
& (CBREAK
|RAW
)));
609 return(termbuf
.c_lflag
& ICANON
);
617 return(!(termbuf
.sg
.sg_flags
&RAW
));
619 return(termbuf
.c_lflag
& ISIG
);
628 termbuf
.sg
.sg_flags
&= ~CBREAK
;
630 termbuf
.sg
.sg_flags
|= CBREAK
;
633 termbuf
.c_lflag
|= ICANON
;
635 termbuf
.c_lflag
&= ~ICANON
;
647 termbuf
.c_lflag
|= ISIG
;
649 termbuf
.c_lflag
&= ~ISIG
;
652 #endif /* LINEMODE */
658 return (termbuf
.sg
.sg_flags
& XTABS
);
661 return (termbuf
.c_oflag
& OXTABS
);
664 return ((termbuf
.c_oflag
& TABDLY
) == TAB3
);
670 tty_setsofttab(int on
)
674 termbuf
.sg
.sg_flags
|= XTABS
;
676 termbuf
.sg
.sg_flags
&= ~XTABS
;
680 termbuf
.c_oflag
|= OXTABS
;
683 termbuf
.c_oflag
&= ~TABDLY
;
684 termbuf
.c_oflag
|= TAB3
;
688 termbuf
.c_oflag
&= ~OXTABS
;
691 termbuf
.c_oflag
&= ~TABDLY
;
692 termbuf
.c_oflag
|= TAB0
;
702 return (!(termbuf
.lflags
& LCTLECH
));
705 return (!(termbuf
.c_lflag
& ECHOCTL
));
708 return (!(termbuf
.c_lflag
& TCTLECH
));
710 # if !defined(ECHOCTL) && !defined(TCTLECH)
711 return (0); /* assumes ctl chars are echoed '^x' */
717 tty_setlitecho(int on
)
721 termbuf
.lflags
&= ~LCTLECH
;
723 termbuf
.lflags
|= LCTLECH
;
727 termbuf
.c_lflag
&= ~ECHOCTL
;
729 termbuf
.c_lflag
|= ECHOCTL
;
733 termbuf
.c_lflag
&= ~TCTLECH
;
735 termbuf
.c_lflag
|= TCTLECH
;
744 return (termbuf
.sg
.sg_flags
& CRMOD
);
746 return (termbuf
.c_iflag
& ICRNL
);
751 * Try to guess whether speeds are "encoded" (4.2BSD) or just numeric (4.4BSD).
760 * A table of available terminal speeds
766 { 0, B0
}, { 50, B50
}, { 75, B75
},
767 { 110, B110
}, { 134, B134
}, { 150, B150
},
768 { 200, B200
}, { 300, B300
}, { 600, B600
},
769 { 1200, B1200
}, { 1800, B1800
}, { 2400, B2400
},
798 #endif /* DECODE_BAUD */
804 struct termspeeds
*tp
;
806 for (tp
= termspeeds
; (tp
->speed
!= -1) && (val
> tp
->speed
); tp
++)
808 if (tp
->speed
== -1) /* back up to last valid value */
810 cfsetospeed(&termbuf
, tp
->value
);
811 #else /* DECODE_BAUD */
812 cfsetospeed(&termbuf
, val
);
813 #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 cfsetispeed(&termbuf
, tp
->value
);
827 #else /* DECODE_BAUD */
828 cfsetispeed(&termbuf
, val
);
829 #endif /* DECODE_BAUD */
835 * Open the slave side of the pty, and do any initialization
849 extern int def_row
, def_col
;
851 extern int def_tspeed
, def_rspeed
;
853 * Opening the slave side may cause initilization of the
854 * kernel tty structure. We need remember the state of
855 * if linemode was turned on
856 * terminal window size
859 * so that we can re-set them if we need to.
862 waslm
= tty_linemode();
864 erase
= termbuf
.c_cc
[VERASE
];
867 * Make sure that we don't have a controlling tty, and
868 * that we are the session (process group) leader.
871 t
= open(_PATH_TTY
, O_RDWR
);
873 (void) ioctl(t
, TIOCNOTTY
, NULL
);
880 fatalperror(net
, line
);
884 * set up the tty modes as we like them to be.
888 if (def_row
|| def_col
) {
889 memset((char *)&ws
, 0, sizeof(ws
));
892 (void)ioctl(t
, TIOCSWINSZ
, (char *)&ws
);
897 * Settings for sgtty based systems
900 termbuf
.sg
.sg_flags
|= CRMOD
|ANYP
|ECHO
|XTABS
;
901 # endif /* USE_TERMIO */
904 * Settings for all other termios/termio based
905 * systems, other than 4.4BSD. In 4.4BSD the
906 * kernel does the initial terminal setup.
908 tty_rspeed((def_rspeed
> 0) ? def_rspeed
: 9600);
909 tty_tspeed((def_tspeed
> 0) ? def_tspeed
: 9600);
911 termbuf
.c_cc
[VERASE
] = erase
;
915 # endif /* LINEMODE */
918 * Set the tty modes, and make this our controlling tty.
921 if (login_tty(t
) == -1)
922 fatalperror(net
, "login_tty");
925 #ifdef AUTHENTICATION
926 #if defined(NO_LOGIN_F) && defined(LOGIN_R)
928 * Leave the pty open so that we can write out the rlogin
929 * protocol for /bin/login, if the authentication works.
937 #endif /* AUTHENTICATION */
944 * Open the specified slave side of the pty,
945 * making sure that we have a clean tty.
953 * Make sure that other people can't open the
954 * slave side of the connection.
956 (void) chown(li
, 0, 0);
957 (void) chmod(li
, 0600);
961 t
= open(line
, O_RDWR
|O_NOCTTY
);
972 * Given a hostname, do whatever
973 * is necessary to startup the login process on the slave side of the pty.
978 startslave(char *host
, int autologin
, char *autoname
)
982 #ifdef AUTHENTICATION
983 if (!autoname
|| !autoname
[0])
986 if (autologin
< auth_level
) {
987 fatalmsg(net
, "Authorization failed");
993 if ((i
= fork()) < 0)
994 fatalperror(net
, "fork");
998 start_login(host
, autologin
, autoname
);
1009 if ((*envp
= getenv("TZ")))
1019 * Assuming that we are now running as a child processes, this
1020 * function will turn us into the login process.
1023 #ifndef AUTHENTICATION
1024 #define undef1 __unused
1030 start_login(char *host undef1
, int autologin undef1
, char *name undef1
)
1037 * -h : pass on name of host.
1038 * WARNING: -h is accepted by login if and only if
1040 * -p : don't clobber the environment (so terminal type stays set).
1042 * -f : force this login, he has already been authenticated
1044 argv
= addarg(0, "login");
1046 #if !defined(NO_LOGIN_H)
1047 #ifdef AUTHENTICATION
1048 # if defined(NO_LOGIN_F) && defined(LOGIN_R)
1050 * Don't add the "-h host" option if we are going
1051 * to be adding the "-r host" option down below...
1053 if ((auth_level
< 0) || (autologin
!= AUTH_VALID
))
1056 argv
= addarg(argv
, "-h");
1057 argv
= addarg(argv
, host
);
1059 #endif /* AUTHENTICATION */
1061 #if !defined(NO_LOGIN_P)
1062 argv
= addarg(argv
, "-p");
1066 * Set the environment variable "LINEMODE" to either
1067 * "real" or "kludge" if we are operating in either
1068 * real or kludge linemode.
1070 if (lmodetype
== REAL_LINEMODE
) {
1071 if (setenv("LINEMODE", "real", 1) == -1)
1072 syslog(LOG_ERR
, "setenv: cannot set LINEMODE=real: %m");
1074 # ifdef KLUDGELINEMODE
1075 else if (lmodetype
== KLUDGE_LINEMODE
|| lmodetype
== KLUDGE_OK
) {
1076 if (setenv("LINEMODE", "kludge", 1) == -1)
1077 syslog(LOG_ERR
, "setenv: cannot set LINEMODE=kludge: %m");
1083 * Are we working as the bftp daemon? If so, then ask login
1084 * to start bftp instead of shell.
1087 argv
= addarg(argv
, "-e");
1088 argv
= addarg(argv
, BFTPPATH
);
1091 #ifdef AUTHENTICATION
1092 if (auth_level
>= 0 && autologin
== AUTH_VALID
) {
1093 # if !defined(NO_LOGIN_F)
1094 argv
= addarg(argv
, "-f");
1095 argv
= addarg(argv
, "--");
1096 argv
= addarg(argv
, name
);
1098 # if defined(LOGIN_R)
1100 * We don't have support for "login -f", but we
1101 * can fool /bin/login into thinking that we are
1102 * rlogind, and allow us to log in without a
1103 * password. The rlogin protocol expects
1104 * local-user\0remote-user\0term/speed\0
1110 int isecho
, israw
, xpty
, len
;
1111 extern int def_rspeed
;
1114 * Tell login that we are coming from "localhost".
1115 * If we passed in the real host name, then the
1116 * user would have to allow .rhost access from
1117 * every machine that they want authenticated
1118 * access to work from, which sort of defeats
1119 * the purpose of an authenticated login...
1120 * So, we tell login that the session is coming
1121 * from "localhost", and the user will only have
1122 * to have "localhost" in their .rhost file.
1124 # define LOGIN_HOST "localhost"
1126 argv
= addarg(argv
, "-r");
1127 argv
= addarg(argv
, LOGIN_HOST
);
1132 isecho
= tty_isecho();
1133 israw
= tty_israw();
1134 if (isecho
|| !israw
) {
1135 tty_setecho(0); /* Turn off echo */
1136 tty_setraw(1); /* Turn on raw */
1139 len
= strlen(name
)+1;
1140 write(xpty
, name
, len
);
1141 write(xpty
, name
, len
);
1142 snprintf(speed
, sizeof(speed
),
1143 "%s/%d", (cp
= getenv("TERM")) ? cp
: "",
1144 (def_rspeed
> 0) ? def_rspeed
: 9600);
1145 len
= strlen(speed
)+1;
1146 write(xpty
, speed
, len
);
1148 if (isecho
|| !israw
) {
1150 tty_setecho(isecho
);
1155 * Write a newline to ensure
1156 * that login will be able to
1159 write(xpty
, "\n", 1);
1165 argv
= addarg(argv
, "--");
1166 argv
= addarg(argv
, name
);
1171 if (getenv("USER")) {
1172 argv
= addarg(argv
, "--");
1173 argv
= addarg(argv
, getenv("USER"));
1174 #if defined(LOGIN_ARGS) && defined(NO_LOGIN_P)
1177 for (cpp
= environ
; *cpp
; cpp
++)
1178 argv
= addarg(argv
, *cpp
);
1182 * Assume that login will set the USER variable
1183 * correctly. For SysV systems, this means that
1184 * USER will no longer be set, just LOGNAME by
1185 * login. (The problem is that if the auto-login
1186 * fails, and the user then specifies a different
1187 * account name, he can get logged in with both
1188 * LOGNAME and USER in his environment, but the
1189 * USER value will be wrong.
1193 #ifdef AUTHENTICATION
1194 #if defined(NO_LOGIN_F) && defined(LOGIN_R)
1198 #endif /* AUTHENTICATION */
1201 if (altlogin
== NULL
) {
1202 altlogin
= _PATH_LOGIN
;
1204 execv(altlogin
, argv
);
1206 syslog(LOG_ERR
, "%s: %m", altlogin
);
1207 fatalperror(net
, altlogin
);
1212 addarg(char **argv
, const char *val
)
1218 * 10 entries, a leading length, and a null
1220 argv
= (char **)malloc(sizeof(*argv
) * 12);
1223 *argv
++ = (char *)10;
1226 for (cpp
= argv
; *cpp
; cpp
++)
1228 if (cpp
== &argv
[(long)argv
[-1]]) {
1230 *argv
= (char *)((long)(*argv
) + 10);
1231 argv
= (char **)realloc(argv
, sizeof(*argv
)*((long)(*argv
) + 2));
1235 cpp
= &argv
[(long)argv
[-1] - 10];
1237 *cpp
++ = strdup(val
);
1245 * We only accept the environment variables listed below.
1250 static const char *rej
[] = {
1255 static const char *acc
[] = {
1256 "XAUTH=", "XAUTHORITY=", "DISPLAY=",
1268 char ** new_environ
;
1271 /* Allocate space for scrubbed environment. */
1272 for (count
= 1, cpp
= environ
; *cpp
; count
++, cpp
++)
1274 if ((new_environ
= malloc(count
* sizeof(char *))) == NULL
) {
1279 for (cpp2
= new_environ
, cpp
= environ
; *cpp
; cpp
++) {
1282 for(p
= rej
; *p
; p
++)
1283 if(strncmp(*cpp
, *p
, strlen(*p
)) == 0) {
1290 for(p
= acc
; *p
; p
++)
1291 if(strncmp(*cpp
, *p
, strlen(*p
)) == 0)
1294 if ((*cpp2
++ = strdup(*cpp
)) == NULL
) {
1295 environ
= new_environ
;
1301 environ
= new_environ
;
1307 * This is the routine to call when we are all through, to
1308 * clean up anything that needs to be cleaned up.
1312 cleanup(int sig __unused
)
1317 p
= line
+ sizeof(_PATH_DEV
) - 1;
1319 * Block all signals before clearing the utmpx entry. We don't want to
1320 * be called again after calling logout() and then not add the wtmpx
1321 * entry because of not finding the corresponding entry in utmpx.
1324 sigprocmask(SIG_SETMASK
, &mask
, NULL
);
1325 if (logoutx(p
, 0, DEAD_PROCESS
))
1326 logwtmpx(p
, "", "", 0, DEAD_PROCESS
);
1327 (void)chmod(line
, 0666);
1328 (void)chown(line
, 0, 0);
1330 (void)chmod(line
, 0666);
1331 (void)chown(line
, 0, 0);
1332 (void) shutdown(net
, SHUT_RDWR
);