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
38 #if defined(_CRAY) || (defined(__hpux) && !defined(HAVE_UTMPX_H))
39 # define PARENT_DOES_UTMP
52 #elif defined(HAVE_UTMP_H)
54 #endif /* HAVE_UTMPX_H */
56 #ifdef HAVE_STRUCT_UTMP_UT_HOST
57 int utmp_len = sizeof(wtmp.ut_host);
59 int utmp_len = MaxHostNameLen;
64 #define UTMP_FILE _PATH_UTMP
66 #define UTMP_FILE "/etc/utmp"
70 /* really, mac os uses wtmpx (or asl) */
75 #if !defined(WTMP_FILE) && defined(_PATH_WTMP)
76 #define WTMP_FILE _PATH_WTMP
79 #ifndef PARENT_DOES_UTMP
81 char wtmpf[] = WTMP_FILE;
83 char wtmpf[] = "/usr/adm/wtmp";
85 char utmpf[] = UTMP_FILE;
86 #else /* PARENT_DOES_UTMP */
88 char wtmpf[] = WTMP_FILE;
90 char wtmpf[] = "/etc/wtmp";
92 #endif /* PARENT_DOES_UTMP */
98 #if !(defined(__sgi) || defined(__linux) || defined(_AIX)) && defined(HAVE_SYS_TTY)
118 #ifdef HAVE_TERMIOS_H
129 #ifdef HAVE_LIBUTIL_H
135 # define TCSANOW TCSETS
136 # define TCSADRAIN TCSETSW
137 # define tcgetattr(f, t) ioctl(f, TCGETS, (char *)t)
140 # define TCSANOW TCSETA
141 # define TCSADRAIN TCSETAW
142 # define tcgetattr(f, t) ioctl(f, TCGETA, (char *)t)
144 # define TCSANOW TIOCSETA
145 # define TCSADRAIN TIOCSETAW
146 # define tcgetattr(f, t) ioctl(f, TIOCGETA, (char *)t)
149 # define tcsetattr(f, a, t) ioctl(f, a, t)
150 # define cfsetospeed(tp, val) (tp)->c_cflag &= ~CBAUD; \
151 (tp)->c_cflag |= (val)
152 # define cfgetospeed(tp) ((tp)->c_cflag & CBAUD)
154 # define cfsetispeed(tp, val) (tp)->c_cflag &= ~CIBAUD; \
155 (tp)->c_cflag |= ((val)<<IBSHIFT)
156 # define cfgetispeed(tp) (((tp)->c_cflag & CIBAUD)>>IBSHIFT)
158 # define cfsetispeed(tp, val) (tp)->c_cflag &= ~CBAUD; \
159 (tp)->c_cflag |= (val)
160 # define cfgetispeed(tp) ((tp)->c_cflag & CBAUD)
162 # endif /* TCSANOW */
163 struct termios termbuf, termbuf2; /* pty control structure */
165 static int ttyfd = -1;
166 int really_stream = 0;
168 #define really_stream 0
171 const char *new_login = _PATH_LOGIN;
178 * These three routines are used to get and set the "termbuf" structure
179 * to and from the kernel. init_termbuf() gets the current settings.
180 * copy_termbuf() hands in a new "termbuf" to write to the kernel, and
181 * set_termbuf() writes the structure into the kernel.
189 tcgetattr(ttyfd, &termbuf);
192 tcgetattr(ourpty, &termbuf);
200 * Only make the necessary changes.
202 if (memcmp(&termbuf, &termbuf2, sizeof(termbuf))) {
205 tcsetattr(ttyfd, TCSANOW, &termbuf);
208 tcsetattr(ourpty, TCSANOW, &termbuf);
214 * spcset(func, valp, valpp)
216 * This function takes various special characters (func), and
217 * sets *valp to the current value of that character, and
218 * *valpp to point to where in the "termbuf" structure that
221 * It returns the SLC_ level of support for this function.
226 spcset(int func, cc_t *valp, cc_t **valpp)
229 #define setval(a, b) *valp = termbuf.c_cc[a]; \
230 *valpp = &termbuf.c_cc[a]; \
232 #define defval(a) *valp = ((cc_t)a); *valpp = (cc_t *)0; return(SLC_DEFAULT);
236 setval(VEOF, SLC_VARIABLE);
238 setval(VERASE, SLC_VARIABLE);
240 setval(VKILL, SLC_VARIABLE);
242 setval(VINTR, SLC_VARIABLE|SLC_FLUSHIN|SLC_FLUSHOUT);
244 setval(VQUIT, SLC_VARIABLE|SLC_FLUSHIN|SLC_FLUSHOUT);
247 setval(VSTART, SLC_VARIABLE);
253 setval(VSTOP, SLC_VARIABLE);
259 setval(VWERASE, SLC_VARIABLE);
265 setval(VREPRINT, SLC_VARIABLE);
271 setval(VLNEXT, SLC_VARIABLE);
276 #if !defined(VDISCARD) && defined(VFLUSHO)
277 # define VDISCARD VFLUSHO
280 setval(VDISCARD, SLC_VARIABLE|SLC_FLUSHOUT);
286 setval(VSUSP, SLC_VARIABLE|SLC_FLUSHIN);
292 setval(VEOL, SLC_VARIABLE);
296 setval(VEOL2, SLC_VARIABLE);
300 setval(VSTATUS, SLC_VARIABLE);
313 return(SLC_NOSUPPORT);
321 * Return the number of pty's configured into the system.
329 if ((numptys = sysconf(_SC_CRAY_NPTY)) != -1)
332 #endif /* _SC_CRAY_NPTY */
340 * Allocate a pty. As a side effect, the external character
341 * array "line" contains the name of the slave side.
343 * Returns the file descriptor of the opened pty.
346 static int ptyslavefd = -1;
348 static char Xline[] = "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0";
352 char myline[] = "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0";
355 #if !defined(HAVE_PTSNAME) && defined(STREAMSPTY)
356 static char *ptsname(int fd)
366 int getpty(int *ptynum)
368 #if defined(HAVE_OPENPTY) || defined(__linux) || defined(__osf__) /* XXX */
372 if(openpty(&master, &slave, line, 0, 0) == 0){
377 #endif /* HAVE_OPENPTY .... */
382 p = _getpty(&master, O_RDWR, 0600, 1);
385 strlcpy(line, p, sizeof(Xline));
392 char *clone[] = { "/dev/ptc", "/dev/ptmx", "/dev/ptm",
393 "/dev/ptym/clone", 0 };
397 for(q=clone; *q; q++){
406 strlcpy(line, ptsname(p), sizeof(Xline));
412 #endif /* STREAMSPTY */
420 snprintf(line, sizeof(Xline), "/dev/ptyXX");
424 snprintf(line, sizeof(Xline), "/dev/ptym/ptyXX");
430 for (cp = "pqrstuvwxyzPQRST"; *cp; cp++) {
436 * This stat() check is just to keep us from
437 * looping through all 256 combinations if there
438 * aren't that many ptys available.
440 if (stat(line, &stb) < 0)
442 for (i = 0; i < 16; i++) {
443 *p2 = "0123456789abcdef"[i];
444 p = open(line, O_RDWR);
453 for (p1 = &line[8]; *p1; p1++)
460 if (ioctl(p, TIOCGPGRP, &dummy) == 0
466 #endif /* SunOS == 40 */
474 extern lowpty, highpty;
478 for (*ptynum = lowpty; *ptynum <= highpty; (*ptynum)++) {
479 snprintf(myline, sizeof(myline), "/dev/pty/%03d", *ptynum);
483 snprintf(line, sizeof(Xline), "/dev/ttyp%03d", *ptynum);
485 * Here are some shenanigans to make sure that there
486 * are no listeners lurking on the line.
488 if(stat(line, &sb) < 0) {
492 if(sb.st_uid || sb.st_gid || sb.st_mode != 0600) {
501 * Now it should be safe...check for accessability.
503 if (access(line, 6) == 0)
506 /* no tty side to pty so skip it */
519 return (termbuf.c_lflag & ECHO);
525 return((termbuf.c_iflag & IXON) ? 1 : 0);
531 return((termbuf.c_iflag & IXANY) ? 1 : 0);
538 termbuf.c_lflag |= ECHO;
540 termbuf.c_lflag &= ~ECHO;
546 return(!(termbuf.c_lflag & ICANON));
553 termbuf.c_iflag &= ~ISTRIP;
555 termbuf.c_iflag |= ISTRIP;
560 tty_binaryout(int on)
563 termbuf.c_cflag &= ~(CSIZE|PARENB);
564 termbuf.c_cflag |= CS8;
565 termbuf.c_oflag &= ~OPOST;
567 termbuf.c_cflag &= ~CSIZE;
568 termbuf.c_cflag |= CS7|PARENB;
569 termbuf.c_oflag |= OPOST;
576 return(!(termbuf.c_iflag & ISTRIP));
580 tty_isbinaryout(void)
582 return(!(termbuf.c_oflag&OPOST));
590 return (termbuf.c_oflag & OXTABS);
593 return ((termbuf.c_oflag & TABDLY) == TAB3);
598 tty_setsofttab(int on)
602 termbuf.c_oflag |= OXTABS;
605 termbuf.c_oflag &= ~TABDLY;
606 termbuf.c_oflag |= TAB3;
610 termbuf.c_oflag &= ~OXTABS;
613 termbuf.c_oflag &= ~TABDLY;
614 termbuf.c_oflag |= TAB0;
623 return (!(termbuf.c_lflag & ECHOCTL));
626 return (!(termbuf.c_lflag & TCTLECH));
628 # if !defined(ECHOCTL) && !defined(TCTLECH)
629 return (0); /* assumes ctl chars are echoed '^x' */
634 tty_setlitecho(int on)
638 termbuf.c_lflag &= ~ECHOCTL;
640 termbuf.c_lflag |= ECHOCTL;
644 termbuf.c_lflag &= ~TCTLECH;
646 termbuf.c_lflag |= TCTLECH;
653 return (termbuf.c_iflag & ICRNL);
657 * Try to guess whether speeds are "encoded" (4.2BSD) or just numeric (4.4BSD).
666 * A table of available terminal speeds
672 { 0, B0 }, { 50, B50 }, { 75, B75 },
673 { 110, B110 }, { 134, B134 }, { 150, B150 },
674 { 200, B200 }, { 300, B300 }, { 600, B600 },
675 { 1200, B1200 }, { 1800, B1800 }, { 2400, B2400 },
704 #endif /* DECODE_BUAD */
710 struct termspeeds *tp;
712 for (tp = termspeeds; (tp->speed != -1) && (val > tp->speed); tp++)
714 if (tp->speed == -1) /* back up to last valid value */
716 cfsetospeed(&termbuf, tp->value);
717 #else /* DECODE_BUAD */
718 cfsetospeed(&termbuf, val);
719 #endif /* DECODE_BUAD */
726 struct termspeeds *tp;
728 for (tp = termspeeds; (tp->speed != -1) && (val > tp->speed); tp++)
730 if (tp->speed == -1) /* back up to last valid value */
732 cfsetispeed(&termbuf, tp->value);
733 #else /* DECODE_BAUD */
734 cfsetispeed(&termbuf, val);
735 #endif /* DECODE_BAUD */
738 #ifdef PARENT_DOES_UTMP
739 extern struct utmp wtmp;
742 extern void utmp_sig_init (void);
743 extern void utmp_sig_reset (void);
744 extern void utmp_sig_wait (void);
745 extern void utmp_sig_notify (int);
746 # endif /* PARENT_DOES_UTMP */
750 /* I_FIND seems to live a life of its own */
751 static int my_find(int fd, char *module)
753 #if defined(I_FIND) && defined(I_LIST)
755 static struct str_list sl;
760 n = ioctl(fd, I_LIST, 0);
762 perror("ioctl(fd, I_LIST, 0)");
765 sl.sl_modlist=(struct str_mlist*)malloc(n * sizeof(struct str_mlist));
767 n = ioctl(fd, I_LIST, &sl);
769 perror("ioctl(fd, I_LIST, n)");
775 for(i=0; i<sl.sl_nmods; i++)
776 if(!strcmp(sl.sl_modlist[i].l_name, module))
782 static void maybe_push_modules(int fd, char **modules)
787 for(p=modules; *p; p++){
788 err = my_find(fd, *p);
791 if(err < 0 && errno != EINVAL)
792 fatalperror(net, "my_find()");
793 /* module not pushed or does not exist */
795 /* p points to null or to an already pushed module, now push all
796 modules before this one */
798 for(p--; p >= modules; p--){
799 err = ioctl(fd, I_PUSH, *p);
800 if(err < 0 && errno != EINVAL)
801 fatalperror(net, "I_PUSH");
809 * Open the slave side of the pty, and do any initialization
810 * that is necessary. The return value is a file descriptor
811 * for the slave side.
813 void getptyslave(void)
819 * Opening the slave side may cause initilization of the
820 * kernel tty structure. We need remember the state of
821 * if linemode was turned on
822 * terminal window size
824 * so that we can re-set them if we need to.
829 * Make sure that we don't have a controlling tty, and
830 * that we are the session (process group) leader.
835 fatalperror(net, "setsid()");
838 t = open(_PATH_TTY, O_RDWR);
840 ioctl(t, TIOCNOTTY, (char *)0);
846 # ifdef PARENT_DOES_UTMP
848 * Wait for our parent to get the utmp stuff to get done.
855 fatalperror(net, line);
862 * Not all systems have (or need) modules ttcompat and pckt so
863 * don't flag it as a fatal error if they don't exist.
868 /* these are the streams modules that we want pushed. note
869 that they are in reverse order, ptem will be pushed
870 first. maybe_push_modules() will try to push all modules
871 before the first one that isn't already pushed. i.e if
872 ldterm is pushed, only ttcompat will be attempted.
874 all this is because we don't know which modules are
875 available, and we don't know which modules are already
876 pushed (via autopush, for instance).
880 char *ttymodules[] = { "ttcompat", "ldterm", "ptem", NULL };
881 char *ptymodules[] = { "pckt", NULL };
883 maybe_push_modules(t, ttymodules);
884 maybe_push_modules(ourpty, ptymodules);
888 * set up the tty modes as we like them to be.
892 if (def_row || def_col) {
893 memset(&ws, 0, sizeof(ws));
896 ioctl(t, TIOCSWINSZ, (char *)&ws);
901 * Settings for sgtty based systems
905 * Settings for UNICOS (and HPUX)
907 # if defined(_CRAY) || defined(__hpux)
908 termbuf.c_oflag = OPOST|ONLCR|TAB3;
909 termbuf.c_iflag = IGNPAR|ISTRIP|ICRNL|IXON;
910 termbuf.c_lflag = ISIG|ICANON|ECHO|ECHOE|ECHOK;
911 termbuf.c_cflag = EXTB|HUPCL|CS8;
915 * Settings for all other termios/termio based
916 * systems, other than 4.4BSD. In 4.4BSD the
917 * kernel does the initial terminal setup.
919 # if !(defined(_CRAY) || defined(__hpux)) && (BSD <= 43)
923 termbuf.c_lflag |= ECHO;
924 termbuf.c_oflag |= ONLCR|OXTABS;
925 termbuf.c_iflag |= ICRNL;
926 termbuf.c_iflag &= ~IXOFF;
928 tty_rspeed((def_rspeed > 0) ? def_rspeed : 9600);
929 tty_tspeed((def_tspeed > 0) ? def_tspeed : 9600);
932 * Set the tty modes, and make this our controlling tty.
935 if (login_tty(t) == -1)
936 fatalperror(net, "login_tty");
949 * Open the specified slave side of the pty,
950 * making sure that we have a clean tty.
953 int cleanopen(char *line)
957 if (ptyslavefd != -1)
965 * Make sure that other people can't open the
966 * slave side of the connection.
976 t = open(line, O_RDWR|O_NOCTTY);
982 * Hangup anybody else using this ttyp, then reopen it for
985 # if !(defined(_CRAY) || defined(__hpux)) && (BSD <= 43) && !defined(STREAMSPTY)
986 signal(SIGHUP, SIG_IGN);
991 signal(SIGHUP, SIG_DFL);
992 t = open(line, O_RDWR|O_NOCTTY);
996 # if defined(_CRAY) && defined(TCVHUP)
999 signal(SIGHUP, SIG_IGN);
1000 ioctl(t, TCVHUP, (char *)0);
1001 signal(SIGHUP, SIG_DFL);
1003 i = open(line, O_RDWR);
1010 # endif /* defined(CRAY) && defined(TCVHUP) */
1014 #if !defined(BSD4_4)
1016 int login_tty(int t)
1018 /* Dont need to set this as the controlling PTY on steams sockets,
1019 * don't abort on failure. */
1020 # if defined(TIOCSCTTY) && !defined(__hpux)
1021 if (ioctl(t, TIOCSCTTY, (char *)0) < 0 && !really_stream)
1022 fatalperror(net, "ioctl(sctty)");
1025 * Close the hard fd to /dev/ttypXXX, and re-open through
1026 * the indirect /dev/tty interface.
1029 if ((t = open("/dev/tty", O_RDWR)) < 0)
1030 fatalperror(net, "open(/dev/tty)");
1034 * We get our controlling tty assigned as a side-effect
1035 * of opening up a tty device. But on BSD based systems,
1036 * this only happens if our process group is zero. The
1037 * setsid() call above may have set our pgrp, so clear
1038 * it out before opening the tty...
1043 setpgrp(0, 0); /* if setpgid isn't available, setpgrp
1044 probably takes arguments */
1046 close(open(line, O_RDWR));
1058 #endif /* BSD <= 43 */
1061 * This comes from ../../bsd/tty.c and should not really be here.
1065 * Clean the tty name. Return a pointer to the cleaned version.
1068 static char * clean_ttyname (char *) __attribute__((unused));
1071 clean_ttyname (char *tty)
1075 if (strncmp (res, _PATH_DEV, strlen(_PATH_DEV)) == 0)
1076 res += strlen(_PATH_DEV);
1077 if (strncmp (res, "pty/", 4) == 0)
1079 if (strncmp (res, "ptym/", 5) == 0)
1085 * Generate a name usable as an `ut_id', typically without `tty'.
1088 #ifdef HAVE_STRUCT_UTMP_UT_ID
1094 if (strncmp (res, "pts/", 4) == 0)
1096 if (strncmp (res, "tty", 3) == 0)
1105 * Given a hostname, do whatever
1106 * is necessary to startup the login process on the slave side of the pty.
1111 startslave(const char *host, const char *utmp_host,
1112 int autologin, char *autoname)
1116 #ifdef AUTHENTICATION
1117 if (!autoname || !autoname[0])
1120 if (autologin < auth_level) {
1121 fatal(net, "Authorization failed");
1128 "\r\n*** Connection not encrypted! "
1129 "Communication may be eavesdropped. ***\r\n";
1131 if (!no_warn && (encrypt_output == 0 || decrypt_input == 0))
1133 writenet(tbuf, strlen(tbuf));
1135 # ifdef PARENT_DOES_UTMP
1137 # endif /* PARENT_DOES_UTMP */
1139 if ((i = fork()) < 0)
1140 fatalperror(net, "fork");
1142 # ifdef PARENT_DOES_UTMP
1144 * Cray parent will create utmp entry for child and send
1145 * signal to child to tell when done. Child waits for signal
1146 * before doing anything important.
1152 utmp_sig_reset(); /* reset handler to default */
1154 * Create utmp entry for child
1156 wtmp.ut_time = time(NULL);
1157 wtmp.ut_type = LOGIN_PROCESS;
1159 strncpy(wtmp.ut_user, "LOGIN", sizeof(wtmp.ut_user));
1160 strncpy(wtmp.ut_host, utmp_host, sizeof(wtmp.ut_host));
1161 strncpy(wtmp.ut_line, clean_ttyname(line), sizeof(wtmp.ut_line));
1162 #ifdef HAVE_STRUCT_UTMP_UT_ID
1163 strncpy(wtmp.ut_id, wtmp.ut_line + 3, sizeof(wtmp.ut_id));
1168 if ((i = open(wtmpf, O_WRONLY|O_APPEND)) >= 0) {
1169 write(i, &wtmp, sizeof(struct utmp));
1173 signal(WJSIGNAL, sigjob);
1175 utmp_sig_notify(pid);
1176 # endif /* PARENT_DOES_UTMP */
1180 /* if we authenticated via K5, try and join the PAG */
1183 start_login(host, autologin, autoname);
1189 #if !HAVE_DECL_ENVIRON
1190 extern char **environ;
1199 if ((*envp = getenv("TZ")))
1201 #if defined(_CRAY) || defined(__hpux)
1203 *envp++ = "TZ=GMT0";
1212 * We only accept the environment variables listed below.
1218 static const char *reject[] = {
1223 static const char *accept[] = {
1224 "XAUTH=", "XAUTHORITY=", "DISPLAY=",
1238 for (cpp2 = cpp = environ; *cpp; cpp++) {
1241 for(p = reject; *p; p++)
1242 if(strncmp(*cpp, *p, strlen(*p)) == 0) {
1249 for(p = accept; *p; p++)
1250 if(strncmp(*cpp, *p, strlen(*p)) == 0)
1265 static void addarg(struct arg_val*, const char*);
1270 * Assuming that we are now running as a child processes, this
1271 * function will turn us into the login process.
1275 start_login(const char *host, int autologin, char *name)
1277 struct arg_val argv;
1282 encrypt_output = NULL;
1283 decrypt_input = NULL;
1294 * Create utmp entry for child
1297 clean_tty = clean_ttyname(line);
1298 memset(&utmpx, 0, sizeof(utmpx));
1299 strncpy(utmpx.ut_user, ".telnet", sizeof(utmpx.ut_user));
1300 strncpy(utmpx.ut_line, clean_tty, sizeof(utmpx.ut_line));
1301 #ifdef HAVE_STRUCT_UTMP_UT_ID
1302 strncpy(utmpx.ut_id, make_id(clean_tty), sizeof(utmpx.ut_id));
1306 utmpx.ut_type = LOGIN_PROCESS;
1308 gettimeofday (&tv, NULL);
1309 utmpx.ut_tv.tv_sec = tv.tv_sec;
1310 utmpx.ut_tv.tv_usec = tv.tv_usec;
1312 if (pututxline(&utmpx) == NULL)
1313 fatal(net, "pututxline failed");
1320 * -h : pass on name of host.
1321 * WARNING: -h is accepted by login if and only if
1323 * -p : don't clobber the environment (so terminal type stays set).
1325 * -f : force this login, he has already been authenticated
1328 /* init argv structure */
1331 argv.argv=malloc(0); /*so we can call realloc later */
1332 addarg(&argv, "login");
1333 addarg(&argv, "-h");
1334 addarg(&argv, host);
1335 addarg(&argv, "-p");
1339 user = getenv("USER");
1340 #ifdef AUTHENTICATION
1341 if (auth_level < 0 || autologin != AUTH_VALID) {
1343 printf("User not authenticated. ");
1345 printf("Using one-time password\r\n");
1347 printf("Using plaintext username and password\r\n");
1350 addarg(&argv, "-a");
1351 addarg(&argv, "otp");
1354 syslog(LOG_INFO, "unauthenticated access from %s (%s)",
1355 host, user ? user : "unknown user");
1357 if (auth_level >= 0 && autologin == AUTH_VALID)
1358 addarg(&argv, "-f");
1361 addarg(&argv, "--");
1362 addarg(&argv, strdup(user));
1364 if (getenv("USER")) {
1366 * Assume that login will set the USER variable
1367 * correctly. For SysV systems, this means that
1368 * USER will no longer be set, just LOGNAME by
1369 * login. (The problem is that if the auto-login
1370 * fails, and the user then specifies a different
1371 * account name, he can get logged in with both
1372 * LOGNAME and USER in his environment, but the
1373 * USER value will be wrong.
1379 * This sleep(1) is in here so that telnetd can
1380 * finish up with the tty. There's a race condition
1381 * the login banner message gets lost...
1385 execv(new_login, argv.argv);
1387 syslog(LOG_ERR, "%s: %m", new_login);
1388 fatalperror_errno(net, new_login, save_errno);
1393 addarg(struct arg_val *argv, const char *val)
1395 if(argv->size <= argv->argc+1) {
1396 argv->argv = realloc(argv->argv, sizeof(char*) * (argv->size + 10));
1397 if (argv->argv == NULL)
1398 fatal (net, "realloc: out of memory");
1401 if((argv->argv[argv->argc++] = strdup(val)) == NULL)
1402 fatal (net, "strdup: out of memory");
1403 argv->argv[argv->argc] = NULL;
1410 * This is the function called by cleanup() to
1411 * remove the utmp entry for this person.
1418 struct utmpx utmpx, *non_save_utxp;
1419 char *clean_tty = clean_ttyname(line);
1422 * This updates the utmpx and utmp entries and make a wtmp/x entry
1426 memset(&utmpx, 0, sizeof(utmpx));
1427 strncpy(utmpx.ut_line, clean_tty, sizeof(utmpx.ut_line));
1428 utmpx.ut_type = LOGIN_PROCESS;
1429 non_save_utxp = getutxline(&utmpx);
1430 if (non_save_utxp) {
1435 utxp = malloc(sizeof(struct utmpx));
1436 *utxp = *non_save_utxp;
1437 user0 = utxp->ut_user[0];
1438 utxp->ut_user[0] = '\0';
1439 utxp->ut_type = DEAD_PROCESS;
1440 #ifdef HAVE_STRUCT_UTMPX_UT_EXIT
1441 #ifdef _STRUCT___EXIT_STATUS
1442 utxp->ut_exit.__e_termination = 0;
1443 utxp->ut_exit.__e_exit = 0;
1444 #elif defined(__osf__) /* XXX */
1445 utxp->ut_exit.ut_termination = 0;
1446 utxp->ut_exit.ut_exit = 0;
1448 utxp->ut_exit.e_termination = 0;
1449 utxp->ut_exit.e_exit = 0;
1452 gettimeofday (&tv, NULL);
1453 utxp->ut_tv.tv_sec = tv.tv_sec;
1454 utxp->ut_tv.tv_usec = tv.tv_usec;
1458 utxp->ut_user[0] = user0;
1459 updwtmpx(WTMPX_FILE, utxp);
1460 #elif defined(WTMP_FILE)
1461 /* This is a strange system with a utmpx and a wtmp! */
1463 int f = open(wtmpf, O_WRONLY|O_APPEND);
1466 strncpy(wtmp.ut_line, clean_tty, sizeof(wtmp.ut_line));
1467 strncpy(wtmp.ut_name, "", sizeof(wtmp.ut_name));
1468 #ifdef HAVE_STRUCT_UTMP_UT_HOST
1469 strncpy(wtmp.ut_host, "", sizeof(wtmp.ut_host));
1471 wtmp.ut_time = time(NULL);
1472 write(f, &wtmp, sizeof(wtmp));
1483 #if !defined(HAVE_UTMPX_H) && !(defined(_CRAY) || defined(__hpux)) && BSD <= 43
1489 struct utmp *u, *utmp;
1492 char *clean_tty = clean_ttyname(line);
1494 f = open(utmpf, O_RDWR);
1497 utmp = (struct utmp *)malloc((unsigned)statbf.st_size);
1499 syslog(LOG_ERR, "utmp malloc failed");
1500 if (statbf.st_size && utmp) {
1501 nutmp = read(f, utmp, (int)statbf.st_size);
1502 nutmp /= sizeof(struct utmp);
1504 for (u = utmp ; u < &utmp[nutmp] ; u++) {
1505 if (strncmp(u->ut_line,
1507 sizeof(u->ut_line)) ||
1510 lseek(f, ((long)u)-((long)utmp), L_SET);
1511 strncpy(u->ut_name, "", sizeof(u->ut_name));
1512 #ifdef HAVE_STRUCT_UTMP_UT_HOST
1513 strncpy(u->ut_host, "", sizeof(u->ut_host));
1515 u->ut_time = time(NULL);
1516 write(f, u, sizeof(wtmp));
1523 f = open(wtmpf, O_WRONLY|O_APPEND);
1525 strncpy(wtmp.ut_line, clean_tty, sizeof(wtmp.ut_line));
1526 strncpy(wtmp.ut_name, "", sizeof(wtmp.ut_name));
1527 #ifdef HAVE_STRUCT_UTMP_UT_HOST
1528 strncpy(wtmp.ut_host, "", sizeof(wtmp.ut_host));
1530 wtmp.ut_time = time(NULL);
1531 write(f, &wtmp, sizeof(wtmp));
1537 line[strlen("/dev/")] = 'p';
1543 #if defined(__hpux) && !defined(HAVE_UTMPX_H)
1549 int fd; /* for /etc/wtmp */
1551 utmp.ut_type = USER_PROCESS;
1552 strncpy(utmp.ut_line, clean_ttyname(line), sizeof(utmp.ut_line));
1554 utptr = getutline(&utmp);
1555 /* write it out only if it exists */
1557 utptr->ut_type = DEAD_PROCESS;
1558 utptr->ut_time = time(NULL);
1560 /* set wtmp entry if wtmp file exists */
1561 if ((fd = open(wtmpf, O_WRONLY | O_APPEND)) >= 0) {
1562 write(fd, utptr, sizeof(utmp));
1570 line[14] = line[13];
1571 line[13] = line[12];
1585 * This is the routine to call when we are all through, to
1586 * clean up anything that needs to be cleaned up.
1589 #ifdef PARENT_DOES_UTMP
1595 static int incleanup = 0;
1597 int child_status; /* status of child process as returned by waitpid */
1598 int flags = WNOHANG|WUNTRACED;
1601 * 1: Pick up the zombie, if we are being called
1602 * as the signal handler.
1603 * 2: If we are a nested cleanup(), return.
1604 * 3: Try to clean up TMPDIR.
1605 * 4: Fill in utmp with shutdown of process.
1606 * 5: Close down the network and pty connections.
1607 * 6: Finish up the TMPDIR cleanup, if needed.
1609 if (sig == SIGCHLD) {
1610 while (waitpid(-1, &child_status, flags) > 0)
1612 /* Check if the child process was stopped
1613 * rather than exited. We want cleanup only if
1614 * the child has died.
1616 if (WIFSTOPPED(child_status)) {
1620 t = sigblock(sigmask(SIGCHLD));
1628 t = cleantmp(&wtmp);
1629 setutent(); /* just to make sure */
1641 #else /* PARENT_DOES_UTMP */
1646 #if defined(HAVE_UTMPX_H) || !defined(HAVE_LOGWTMP)
1650 vhangup(); /* XXX */
1656 p = line + sizeof("/dev/") - 1;
1669 #endif /* PARENT_DOES_UTMP */
1671 #ifdef PARENT_DOES_UTMP
1676 * These three functions are used to coordinate the handling of
1677 * the utmp file between the server and the soon-to-be-login shell.
1678 * The server actually creates the utmp structure, the child calls
1679 * utmp_sig_wait(), until the server calls utmp_sig_notify() and
1680 * signals the future-login shell to proceed.
1682 static int caught=0; /* NZ when signal intercepted */
1683 static void (*func)(); /* address of previous handler */
1690 signal(SIGUSR1, func);
1697 * register signal handler for UTMP creation
1699 if ((int)(func = signal(SIGUSR1, _utmp_sig_rcv)) == -1)
1700 fatalperror(net, "telnetd/signal");
1706 signal(SIGUSR1, func); /* reset handler to default */
1710 # define sigoff() /* do nothing */
1711 # define sigon() /* do nothing */
1718 * Wait for parent to write our utmp entry.
1721 while (caught == 0) {
1722 pause(); /* wait until we get a signal (sigon) */
1723 sigoff(); /* turn off signals while we check caught */
1725 sigon(); /* turn on signals again */
1729 utmp_sig_notify(pid)
1735 static int gotsigjob = 0;
1745 while ((jid = waitjob(NULL)) != -1) {
1750 jobend(jid, NULL, NULL);
1756 * called by jobend() before calling cleantmp()
1757 * to find the correct $TMPDIR to cleanup.
1764 struct utmp *cur = NULL;
1766 setutent(); /* just to make sure */
1767 while (cur = getutent()) {
1768 if ( (cur->ut_type != NULL) && (jid == cur->ut_jid) ) {
1777 * Clean up the TMPDIR that login created.
1778 * The first time this is called we pick up the info
1779 * from the utmp. If the job has already gone away,
1780 * then we'll clean up and be done. If not, then
1781 * when this is called the second time it will wait
1782 * for the signal that the job is done.
1789 static int first = 1;
1790 int mask, omask, ret;
1791 extern struct utmp *getutid (const struct utmp *_Id);
1794 mask = sigmask(WJSIGNAL);
1797 omask = sigblock(mask);
1798 while (gotsigjob == 0)
1803 setutent(); /* just to make sure */
1807 syslog(LOG_ERR, "Can't get /etc/utmp entry to clean TMPDIR");
1811 * Nothing to clean up if the user shell was never started.
1813 if (utp->ut_type != USER_PROCESS || utp->ut_jid == 0)
1817 * Block the WJSIGNAL while we are in jobend().
1819 omask = sigblock(mask);
1820 ret = jobend(utp->ut_jid, utp->ut_tpath, utp->ut_user);
1826 jobend(jid, path, user)
1831 static int saved_jid = 0;
1832 static int pty_saved_jid = 0;
1833 static char saved_path[sizeof(wtmp.ut_tpath)+1];
1834 static char saved_user[sizeof(wtmp.ut_user)+1];
1837 * this little piece of code comes into play
1838 * only when ptyreconnect is used to reconnect
1839 * to an previous session.
1841 * this is the only time when the
1842 * "saved_jid != jid" code is executed.
1845 if ( saved_jid && saved_jid != jid ) {
1846 if (!path) { /* called from signal handler */
1847 pty_saved_jid = jid;
1849 pty_saved_jid = saved_jid;
1854 strlcpy(saved_path, path, sizeof(saved_path));
1855 strlcpy(saved_user, user, sizeof(saved_user));
1857 if (saved_jid == 0) {
1862 /* if the jid has changed, get the correct entry from the utmp file */
1864 if ( saved_jid != jid ) {
1865 struct utmp *utp = NULL;
1866 struct utmp *jid_getutid();
1868 utp = jid_getutid(pty_saved_jid);
1871 syslog(LOG_ERR, "Can't get /etc/utmp entry to clean TMPDIR");
1875 cleantmpdir(jid, utp->ut_tpath, utp->ut_user);
1879 cleantmpdir(jid, saved_path, saved_user);
1884 * Fork a child process to clean up the TMPDIR
1886 cleantmpdir(jid, tpath, user)
1893 syslog(LOG_ERR, "TMPDIR cleanup(%s): fork() failed: %m\n",
1897 execl(CLEANTMPCMD, CLEANTMPCMD, user, tpath, NULL);
1898 syslog(LOG_ERR, "TMPDIR cleanup(%s): execl(%s) failed: %m\n",
1899 tpath, CLEANTMPCMD);
1903 * Forget about child. We will exit, and
1904 * /etc/init will pick it up.
1910 #endif /* defined(PARENT_DOES_UTMP) */