386BSD 0.1 development

[unix-history] / usr / src / usr.bin / login / login.c

diff --git a/usr/src/usr.bin/login/login.c b/usr/src/usr.bin/login/login.c
index 49b62b1..e095538 100644 (file)
--- a/usr/src/usr.bin/login/login.c
+++ b/usr/src/usr.bin/login/login.c
@@ -1,353 +1,402 @@
-/*
- * Copyright (c) 1980, 1987 Regents of the University of California.
- * All rights reserved.  The Berkeley software License Agreement
- * specifies the terms and conditions for redistribution.
+/*-
+ * Copyright (c) 1980, 1987, 1988, 1991 The Regents of the University
+ * of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *     This product includes software developed by the University of
+ *     California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.

  */
 
 #ifndef lint
 char copyright[] =
  */
 
 #ifndef lint
 char copyright[] =

-"@(#) Copyright (c) 1980 Regents of the University of California.\n\
+"@(#) Copyright (c) 1980, 1987, 1988, 1991 The Regents of the University of California.\n\

  All rights reserved.\n";
  All rights reserved.\n";

-#endif not lint
+#endif /* not lint */

 
 #ifndef lint
 
 #ifndef lint

-static char sccsid[] = "@(#)login.c    5.24 (Berkeley) %G%";
-#endif not lint
+static char sccsid[] = "@(#)login.c    5.73 (Berkeley) 6/29/91";
+#endif /* not lint */

 
 /*
  * login [ name ]
 
 /*
  * login [ name ]

- * login -r hostname   (for rlogind)

  * login -h hostname   (for telnetd, etc.)
  * login -f name       (for pre-authenticated login: datakit, xterm, etc.)
  */
 
 #include <sys/param.h>
  * login -h hostname   (for telnetd, etc.)
  * login -f name       (for pre-authenticated login: datakit, xterm, etc.)
  */
 
 #include <sys/param.h>

-#include <sys/quota.h>

 #include <sys/stat.h>
 #include <sys/time.h>
 #include <sys/resource.h>
 #include <sys/file.h>
 #include <sys/stat.h>
 #include <sys/time.h>
 #include <sys/resource.h>
 #include <sys/file.h>

-#include <sys/termios.h>
-#include <sys/ioctl.h>

 
 #include <utmp.h>
 #include <signal.h>
 
 #include <utmp.h>
 #include <signal.h>

-#include <lastlog.h>

 #include <errno.h>
 #include <ttyent.h>
 #include <syslog.h>
 #include <grp.h>
 #include <pwd.h>
 #include <errno.h>
 #include <ttyent.h>
 #include <syslog.h>
 #include <grp.h>
 #include <pwd.h>

+#include <setjmp.h>

 #include <stdio.h>
 #include <stdio.h>

-#include <strings.h>
+#include <string.h>
+#include <tzfile.h>
+#include "pathnames.h"

 
 #define        TTYGRPNAME      "tty"           /* name of group to own ttys */
 
 
 #define        TTYGRPNAME      "tty"           /* name of group to own ttys */
 

-#define        MOTDFILE        "/etc/motd"
-#define        MAILDIR         "/usr/spool/mail"
-#define        NOLOGIN         "/etc/nologin"
-#define        HUSHLOGIN       ".hushlogin"
-#define        LASTLOG         "/usr/adm/lastlog"
-#define        BSHELL          "/bin/sh"
-

 /*
  * This bounds the time given to login.  Not a define so it can
  * be patched on machines where it's too small.
  */
 int    timeout = 300;
 /*
  * This bounds the time given to login.  Not a define so it can
  * be patched on machines where it's too small.
  */
 int    timeout = 300;

-
-struct passwd nouser = {"", "NOLOGIN", -1, -1, -1, "", "", "", "" };
-struct sgttyb ttyb;
-struct passwd *pwd;
-char term[64], *hostname, *username;
-
-struct tchars tc = {
-       CINTR, CQUIT, CSTART, CSTOP, CEOT, CBRK
-};
-struct ltchars ltc = {
-       CSUSP, CDSUSP, CRPRNT, CFLUSH, CWERASE, CLNEXT
-};
+int    rootlogin;
+#ifdef KERBEROS
+int    notickets = 1;
+char   *instance;
+char   *krbtkfile_env;
+int    authok;
+#endif
+
+struct passwd *pwd;
+int    failures;
+char   term[64], *envinit[1], *hostname, *username, *tty;

 
 main(argc, argv)
        int argc;
        char **argv;
 {
 
 main(argc, argv)
        int argc;
        char **argv;
 {

-       extern int errno, optind;
+       extern int optind;

        extern char *optarg, **environ;
        extern char *optarg, **environ;

+       struct timeval tp;

        struct group *gr;
        register int ch;
        register char *p;
        struct group *gr;
        register int ch;
        register char *p;

-       int fflag, hflag, pflag, rflag, cnt;
-       int quietlog, passwd_req, ioctlval, timedout();
-       char *domain, *envinit[1], *ttyn, *tty;
-       char tbuf[MAXPATHLEN + 2];
-       char *ttyname(), *stypeof(), *crypt(), *getpass();
+       int ask, fflag, hflag, pflag, cnt, uid;
+       int quietlog, rval;
+       char *domain, *salt, *ttyn;
+       char tbuf[MAXPATHLEN + 2], tname[sizeof(_PATH_TTY) + 10];
+       char localhost[MAXHOSTNAMELEN];
+       char *ctime(), *ttyname(), *stypeof(), *crypt(), *getpass();

        time_t time();
        off_t lseek();
        time_t time();
        off_t lseek();

+       void timedout();

 
        (void)signal(SIGALRM, timedout);
        (void)alarm((u_int)timeout);
        (void)signal(SIGQUIT, SIG_IGN);
        (void)signal(SIGINT, SIG_IGN);
        (void)setpriority(PRIO_PROCESS, 0, 0);
 
        (void)signal(SIGALRM, timedout);
        (void)alarm((u_int)timeout);
        (void)signal(SIGQUIT, SIG_IGN);
        (void)signal(SIGINT, SIG_IGN);
        (void)setpriority(PRIO_PROCESS, 0, 0);

-       (void)quota(Q_SETUID, 0, 0, 0);
+
+       openlog("login", LOG_ODELAY, LOG_AUTH);

 
        /*
         * -p is used by getty to tell login not to destroy the environment
 
        /*
         * -p is used by getty to tell login not to destroy the environment

-        * -r is used by rlogind to cause the autologin protocol;

         * -f is used to skip a second login authentication 
         * -f is used to skip a second login authentication 

-        * -h is used by other servers to pass the name of the
-        * remote host to login so that it may be placed in utmp and wtmp
+        * -h is used by other servers to pass the name of the remote
+        *    host to login so that it may be placed in utmp and wtmp

         */
         */

-       (void)gethostname(tbuf, sizeof(tbuf));
-       domain = index(tbuf, '.');
+       domain = NULL;
+       if (gethostname(localhost, sizeof(localhost)) < 0)
+               syslog(LOG_ERR, "couldn't get local hostname: %m");
+       else
+               domain = index(localhost, '.');

 
 

-       fflag = hflag = pflag = rflag = 0;
-       passwd_req = 1;
-       while ((ch = getopt(argc, argv, "f:h:pr:")) != EOF)
-               switch(ch) {
+       fflag = hflag = pflag = 0;
+       uid = getuid();
+       while ((ch = getopt(argc, argv, "fh:p")) != EOF)
+               switch (ch) {

                case 'f':
                case 'f':

-                       if (rflag) {
-                               fprintf(stderr,
-                                   "login: only one of -r and -f allowed.\n");
-                               exit(1);
-                       }

                        fflag = 1;
                        fflag = 1;

-                       username = optarg;

                        break;
                case 'h':
                        break;
                case 'h':

-                       if (getuid()) {
-                               fprintf(stderr,
-                                   "login: -h for super-user only.\n");
-                               exit(1);
-                       }
-                       if (rflag) {
-                               fprintf(stderr,
-                                   "login: only one of -r and -h allowed.\n");
+                       if (uid) {
+                               (void)fprintf(stderr,
+                                   "login: -h option: %s\n", strerror(EPERM));

                                exit(1);
                        }
                        hflag = 1;
                        if (domain && (p = index(optarg, '.')) &&
                                exit(1);
                        }
                        hflag = 1;
                        if (domain && (p = index(optarg, '.')) &&

-                           strcmp(p, domain) == 0)
+                           strcasecmp(p, domain) == 0)

                                *p = 0;
                        hostname = optarg;
                        break;
                case 'p':
                        pflag = 1;
                        break;
                                *p = 0;
                        hostname = optarg;
                        break;
                case 'p':
                        pflag = 1;
                        break;

-               case 'r':
-                       if (hflag || fflag) {
-                               fprintf(stderr,
-                                   "login: -f and -h not allowed with -r.\n");
-                               exit(1);
-                       }
-                       rflag = 1;
-                       passwd_req = doremotelogin(optarg);
-                       if (domain && (p = index(optarg, '.')) &&
-                           !strcmp(p, domain))
-                               *p = '\0';
-                       hostname = optarg;
-                       break;

                case '?':
                default:
                case '?':
                default:

-                       fprintf(stderr, "usage: login [-p] [username]\n");
+                       if (!uid)
+                               syslog(LOG_ERR, "invalid flag %c", ch);
+                       (void)fprintf(stderr,
+                           "usage: login [-fp] [-h hostname] [username]\n");

                        exit(1);
                }
        argc -= optind;
        argv += optind;
                        exit(1);
                }
        argc -= optind;
        argv += optind;

-       if (*argv)
+       if (*argv) {

                username = *argv;
                username = *argv;

-
-       ioctlval = 0;
-       (void)ioctl(0, TIOCLSET, &ioctlval);
-       (void)ioctl(0, TIOCNXCL, 0);
-       (void)ioctl(0, FIONBIO, &ioctlval);
-       (void)ioctl(0, FIOASYNC, &ioctlval);
-       (void)ioctl(0, TIOCGETP, &ttyb);
-
-       /*
-        * If talking to an rlogin process, propagate the terminal type and
-        * baud rate across the network.
-        */
-       if (rflag)
-               doremoteterm(&ttyb);
-       ttyb.sg_erase = CERASE;
-       ttyb.sg_kill = CKILL;
-       (void)ioctl(0, TIOCSLTC, &ltc);
-       (void)ioctl(0, TIOCSETC, &tc);
-       (void)ioctl(0, TIOCSETP, &ttyb);
+               ask = 0;
+       } else
+               ask = 1;

 
        for (cnt = getdtablesize(); cnt > 2; cnt--)
                close(cnt);
 
        ttyn = ttyname(0);
 
        for (cnt = getdtablesize(); cnt > 2; cnt--)
                close(cnt);
 
        ttyn = ttyname(0);

-       if (ttyn == NULL || *ttyn == '\0')
-               ttyn = "/dev/tty??";
+       if (ttyn == NULL || *ttyn == '\0') {
+               (void)sprintf(tname, "%s??", _PATH_TTY);
+               ttyn = tname;
+       }

        if (tty = rindex(ttyn, '/'))
                ++tty;
        else
                tty = ttyn;
 
        if (tty = rindex(ttyn, '/'))
                ++tty;
        else
                tty = ttyn;
 

-       openlog("login", LOG_ODELAY, LOG_AUTH);
-
-       for (cnt = 0;; username = NULL) {
-               ioctlval = 0;
-               (void)ioctl(0, TIOCSETD, &ioctlval);
-
-               if (!username)
+       for (cnt = 0;; ask = 1) {
+               if (ask) {
+                       fflag = 0;

                        getloginname();
                        getloginname();

-               if ((pwd = getpwnam(username)) == NULL)
-                       pwd = &nouser;
-
-               /* if user not super-user, check for disabled logins */
-               if (pwd->pw_uid)
-                       checknologin();
-
-               if (!strcmp(pwd->pw_shell, "/bin/csh")) {
-                       ioctlval = NTTYDISC;
-                       (void)ioctl(0, TIOCSETD, &ioctlval);

                }
                }

+#ifdef KERBEROS
+               if ((instance = index(username, '.')) != NULL) {
+                       if (strncmp(instance, ".root", 5) == 0)
+                               rootlogin++;
+                       *instance++ = '\0';
+               } else {
+                       rootlogin = 0;
+                       instance = "";
+               }
+#else
+               rootlogin = 0;
+#endif
+               if (strlen(username) > UT_NAMESIZE)
+                       username[UT_NAMESIZE] = '\0';

 
                /*
 
                /*

-                * disallow automatic login to root, or if not root
-                * and the uid's differ
+                * Note if trying multiple user names; log failures for
+                * previous user name, but don't bother logging one failure
+                * for nonexistent name (mistyped username).

                 */
                 */

-               if (fflag) {
-                       int uid = getuid();
-
-                       passwd_req = !pwd->pw_uid || uid && uid != pwd->pw_uid;
+               if (failures && strcmp(tbuf, username)) {
+                       if (failures > (pwd ? 0 : 1))
+                               badlogin(tbuf);
+                       failures = 0;

                }
                }

+               (void)strcpy(tbuf, username);
+
+               if (pwd = getpwnam(username))
+                       salt = pwd->pw_passwd;
+               else
+                       salt = "xx";

 
                /*
 
                /*

-                * If no remote login authentication and a password exists
-                * for this user, prompt for one and verify it.
+                * if we have a valid account name, and it doesn't have a
+                * password, or the -f option was specified and the caller
+                * is root or the caller isn't changing their uid, don't
+                * authenticate.

                 */
                 */

-               if (!passwd_req || !*pwd->pw_passwd)
+               if (pwd && (*pwd->pw_passwd == '\0' ||
+                   fflag && (uid == 0 || uid == pwd->pw_uid)))

                        break;
                        break;

+               fflag = 0;
+               if (pwd && pwd->pw_uid == 0)
+                       rootlogin = 1;
+
+               (void)setpriority(PRIO_PROCESS, 0, -4);

 
 

-               setpriority(PRIO_PROCESS, 0, -4);

                p = getpass("Password:");
                p = getpass("Password:");

-               p = crypt(p, pwd->pw_passwd);
-               setpriority(PRIO_PROCESS, 0, 0);
-               if (!strcmp(p, pwd->pw_passwd))
-                       break;

 
 

-               printf("Login incorrect\n");
-               if (++cnt >= 5) {
+               if (pwd) {
+#ifdef KERBEROS
+                       rval = klogin(pwd, instance, localhost, p);
+                       if (rval == 0)
+                               authok = 1;
+                       else if (rval == 1) {
+                               if (pwd->pw_uid != 0)
+                                       rootlogin = 0;
+                               rval = strcmp(crypt(p, salt), pwd->pw_passwd);
+                       }
+#else
+                       if (pwd->pw_uid != 0)
+                               rootlogin = 0;
+#ifdef DES
+                       rval = strcmp(crypt(p, salt), pwd->pw_passwd);
+#else
+                       rval = strcmp(p, pwd->pw_passwd);
+#endif
+#endif
+               }
+               bzero(p, strlen(p));
+
+               (void)setpriority(PRIO_PROCESS, 0, 0);
+
+               /*
+                * If trying to log in as root without Kerberos,
+                * but with insecure terminal, refuse the login attempt.
+                */
+#ifdef KERBEROS
+               if (authok == 0)
+#endif
+               if (pwd && rootlogin && !rootterm(tty)) {
+                       (void)fprintf(stderr,
+                           "%s login refused on this terminal.\n",
+                           pwd->pw_name);

                        if (hostname)
                        if (hostname)

-                           syslog(LOG_ERR,
-                               "REPEATED LOGIN FAILURES ON %s FROM %.*s, %.*s",
-                               tty, UT_HOSTSIZE, hostname, UT_NAMESIZE,
-                               username);
+                               syslog(LOG_NOTICE,
+                                   "LOGIN %s REFUSED FROM %s ON TTY %s",
+                                   pwd->pw_name, hostname, tty);

                        else
                        else

-                           syslog(LOG_ERR,
-                               "REPEATED LOGIN FAILURES ON %s, %.*s",
-                               tty, UT_NAMESIZE, username);
-                       (void)ioctl(0, TIOCHPCL, (struct sgttyb *)NULL);
-                       sleepexit(1);
+                               syslog(LOG_NOTICE,
+                                   "LOGIN %s REFUSED ON TTY %s",
+                                    pwd->pw_name, tty);
+                       continue;
+               }
+
+               if (pwd && !rval)
+                       break;
+
+               (void)printf("Login incorrect\n");
+               failures++;
+               /* we allow 10 tries, but after 3 we start backing off */
+               if (++cnt > 3) {
+                       if (cnt >= 10) {
+                               badlogin(username);
+                               sleepexit(1);
+                       }
+                       sleep((u_int)((cnt - 3) * 5));

                }
        }
 
        /* committed to login -- turn off timeout */
        (void)alarm((u_int)0);
 
                }
        }
 
        /* committed to login -- turn off timeout */
        (void)alarm((u_int)0);
 

-       /*
-        * If valid so far and root is logging in, see if root logins on
-        * this terminal are permitted.
-        */
-       if (!pwd->pw_uid && !rootterm(tty)) {
-               if (hostname)
-                       syslog(LOG_CRIT, "ROOT LOGIN REFUSED ON %s FROM %.*s",
-                           tty, UT_HOSTSIZE, hostname);
-               else
-                       syslog(LOG_CRIT, "ROOT LOGIN REFUSED ON %s", tty);
-               printf("Login incorrect\n");
-               sleepexit(1);
-       }
+       endpwent();

 
 

-       if (*pwd->pw_shell == '\0')
-               pwd->pw_shell = BSHELL;
+       /* if user not super-user, check for disabled logins */
+       if (!rootlogin)
+               checknologin();

 
        if (chdir(pwd->pw_dir) < 0) {
 
        if (chdir(pwd->pw_dir) < 0) {

-               printf("No directory %s!\n", pwd->pw_dir);
+               (void)printf("No home directory %s!\n", pwd->pw_dir);

                if (chdir("/"))
                        exit(0);
                pwd->pw_dir = "/";
                if (chdir("/"))
                        exit(0);
                pwd->pw_dir = "/";

-               printf("Logging in with home = \"/\".\n");
+               (void)printf("Logging in with home = \"/\".\n");

        }
 
        }
 

-       if (quota(Q_SETUID, pwd->pw_uid, 0, 0) < 0 && errno != EINVAL) {
-               switch(errno) {
-               case EUSERS:
-                       fprintf(stderr,
-               "Too many users logged on already.\nTry again later.\n");
-                       break;
-               case EPROCLIM:
-                       fprintf(stderr,
-                           "You have too many processes running.\n");
-                       break;
-               default:
-                       perror("quota (Q_SETUID)");
-               }
-               sleepexit(0);
-       }
+       quietlog = access(_PATH_HUSHLOGIN, F_OK) == 0;
+
+       if (pwd->pw_change || pwd->pw_expire)
+               (void)gettimeofday(&tp, (struct timezone *)NULL);
+       if (pwd->pw_change)
+               if (tp.tv_sec >= pwd->pw_change) {
+                       (void)printf("Sorry -- your password has expired.\n");
+                       sleepexit(1);
+               } else if (pwd->pw_change - tp.tv_sec <
+                   2 * DAYSPERWEEK * SECSPERDAY && !quietlog)
+                       (void)printf("Warning: your password expires on %s",
+                           ctime(&pwd->pw_expire));
+       if (pwd->pw_expire)
+               if (tp.tv_sec >= pwd->pw_expire) {
+                       (void)printf("Sorry -- your account has expired.\n");
+                       sleepexit(1);
+               } else if (pwd->pw_expire - tp.tv_sec <
+                   2 * DAYSPERWEEK * SECSPERDAY && !quietlog)
+                       (void)printf("Warning: your account expires on %s",
+                           ctime(&pwd->pw_expire));

 
 

+       /* nothing else left to fail -- really log in */

        {
                struct utmp utmp;
 
        {
                struct utmp utmp;
 

+               bzero((void *)&utmp, sizeof(utmp));

                (void)time(&utmp.ut_time);
                strncpy(utmp.ut_name, username, sizeof(utmp.ut_name));
                (void)time(&utmp.ut_time);
                strncpy(utmp.ut_name, username, sizeof(utmp.ut_name));

-               strncpy(utmp.ut_host, hostname, sizeof(utmp.ut_host));
+               if (hostname)
+                       strncpy(utmp.ut_host, hostname, sizeof(utmp.ut_host));

                strncpy(utmp.ut_line, tty, sizeof(utmp.ut_line));
                login(&utmp);
        }
 
                strncpy(utmp.ut_line, tty, sizeof(utmp.ut_line));
                login(&utmp);
        }
 

-       quietlog = access(HUSHLOGIN, F_OK) == 0;
-       dolastlog(quietlog, tty);
-
-       if (!hflag && !rflag) {                                 /* XXX */
-               static struct winsize win = { 0, 0, 0, 0 };
-
-               (void)ioctl(0, TIOCSWINSZ, &win);
-       }
+       dolastlog(quietlog);

 
        (void)chown(ttyn, pwd->pw_uid,
            (gr = getgrnam(TTYGRPNAME)) ? gr->gr_gid : pwd->pw_gid);
 
        (void)chown(ttyn, pwd->pw_uid,
            (gr = getgrnam(TTYGRPNAME)) ? gr->gr_gid : pwd->pw_gid);

-       (void)chmod(ttyn, 0620);

        (void)setgid(pwd->pw_gid);
 
        initgroups(username, pwd->pw_gid);
 
        (void)setgid(pwd->pw_gid);
 
        initgroups(username, pwd->pw_gid);
 

-       quota(Q_DOWARN, pwd->pw_uid, (dev_t)-1, 0);
-       (void)setuid(pwd->pw_uid);
+       if (*pwd->pw_shell == '\0')
+               pwd->pw_shell = _PATH_BSHELL;

 
        /* destroy environment unless user has requested preservation */
        if (!pflag)
                environ = envinit;
 
        /* destroy environment unless user has requested preservation */
        if (!pflag)
                environ = envinit;

-       setenv("HOME", pwd->pw_dir, 1);
-       setenv("SHELL", pwd->pw_shell, 1);
+       (void)setenv("HOME", pwd->pw_dir, 1);
+       (void)setenv("SHELL", pwd->pw_shell, 1);

        if (term[0] == '\0')
                strncpy(term, stypeof(tty), sizeof(term));
        if (term[0] == '\0')
                strncpy(term, stypeof(tty), sizeof(term));

-       setenv("TERM", term, 0);
-       setenv("USER", pwd->pw_name, 1);
-       setenv("PATH", ":/usr/ucb:/bin:/usr/bin", 0);
+       (void)setenv("TERM", term, 0);
+       (void)setenv("LOGNAME", pwd->pw_name, 1);
+       (void)setenv("USER", pwd->pw_name, 1);
+       (void)setenv("PATH", _PATH_DEFPATH, 0);
+#ifdef KERBEROS
+       if (krbtkfile_env)
+               (void)setenv("KRBTKFILE", krbtkfile_env, 1);
+#endif

 
        if (tty[sizeof("tty")-1] == 'd')
                syslog(LOG_INFO, "DIALUP %s, %s", tty, pwd->pw_name);
 
        if (tty[sizeof("tty")-1] == 'd')
                syslog(LOG_INFO, "DIALUP %s, %s", tty, pwd->pw_name);

-       if (pwd->pw_uid == 0)
+       /* if fflag is on, assume caller/authenticator has logged root login */
+       if (rootlogin && fflag == 0)

                if (hostname)
                if (hostname)

-                       syslog(LOG_NOTICE, "ROOT LOGIN %s FROM %.*s",
-                           tty, UT_HOSTSIZE, hostname);
+                       syslog(LOG_NOTICE, "ROOT LOGIN (%s) ON %s FROM %s",
+                           username, tty, hostname);

                else
                else

-                       syslog(LOG_NOTICE, "ROOT LOGIN %s", tty);
+                       syslog(LOG_NOTICE, "ROOT LOGIN (%s) ON %s", username, tty);
+
+#ifdef KERBEROS
+       if (!quietlog && notickets == 1)
+               (void)printf("Warning: no Kerberos tickets issued.\n");
+#endif

 
        if (!quietlog) {
                struct stat st;
 
 
        if (!quietlog) {
                struct stat st;
 

+               printf("%s%s",
+                       "386BSD Release 0.1 by William and Lynne Jolitz.\n",
+"Copyright (c) 1989,1990,1991,1992 William F. Jolitz. All rights reserved.\n\
+Based in part on work by the 386BSD User Community and the\n\
+BSD Networking Software, Release 2 by UCB EECS Department.\n");
+

                motd();
                motd();

-               (void)sprintf(tbuf, "%s/%s", MAILDIR, pwd->pw_name);
+               (void)sprintf(tbuf, "%s/%s", _PATH_MAILDIR, pwd->pw_name);

                if (stat(tbuf, &st) == 0 && st.st_size != 0)
                if (stat(tbuf, &st) == 0 && st.st_size != 0)

-                       printf("You have %smail.\n",
+                       (void)printf("You have %smail.\n",

                            (st.st_mtime > st.st_atime) ? "new " : "");
        }
 
                            (st.st_mtime > st.st_atime) ? "new " : "");
        }
 


@@ -359,122 +408,160 @@ main(argc, argv)
        tbuf[0] = '-';
        strcpy(tbuf + 1, (p = rindex(pwd->pw_shell, '/')) ?
            p + 1 : pwd->pw_shell);
        tbuf[0] = '-';
        strcpy(tbuf + 1, (p = rindex(pwd->pw_shell, '/')) ?
            p + 1 : pwd->pw_shell);

+
+       if (setlogin(pwd->pw_name) < 0)
+               syslog(LOG_ERR, "setlogin() failure: %m");
+
+       /* discard permissions last so can't get killed and drop core */
+       if (rootlogin)
+               (void) setuid(0);
+       else
+               (void) setuid(pwd->pw_uid);
+

        execlp(pwd->pw_shell, tbuf, 0);
        execlp(pwd->pw_shell, tbuf, 0);

-       perror(pwd->pw_shell);
-       fprintf(stderr, "login: no shell\n");
-       exit(0);
+       (void)fprintf(stderr, "%s: %s\n", pwd->pw_shell, strerror(errno));
+       exit(1);

 }
 
 }
 

+#ifdef KERBEROS
+#define        NBUFSIZ         (UT_NAMESIZE + 1 + 5) /* .root suffix */
+#else
+#define        NBUFSIZ         (UT_NAMESIZE + 1)
+#endif
+

 getloginname()
 {
        register int ch;
        register char *p;
 getloginname()
 {
        register int ch;
        register char *p;

-       static char nbuf[UT_NAMESIZE + 1];
+       static char nbuf[NBUFSIZ];

 
        for (;;) {
 
        for (;;) {

-               p = nbuf;
-               printf("login: ");
-               while ((ch = getchar()) != '\n') {
-                       if (ch == ' ')
-                               ch = '_';
-                       if (ch == EOF)
+               (void)printf("login: ");
+               for (p = nbuf; (ch = getchar()) != '\n'; ) {
+                       if (ch == EOF) {
+                               badlogin(username);

                                exit(0);
                                exit(0);

-                       if (p < nbuf+UT_NAMESIZE)
+                       }
+                       if (p < nbuf + (NBUFSIZ - 1))

                                *p++ = ch;
                }
                if (p > nbuf)
                        if (nbuf[0] == '-')
                                *p++ = ch;
                }
                if (p > nbuf)
                        if (nbuf[0] == '-')

-                               fprintf(stderr,
+                               (void)fprintf(stderr,

                                    "login names may not start with '-'.\n");
                        else {
                                *p = '\0';
                                username = nbuf;
                                    "login names may not start with '-'.\n");
                        else {
                                *p = '\0';
                                username = nbuf;

-                               return;
+                               break;

                        }
        }
                        }
        }

-       /* NOTREACHED */

 }
 
 }
 

+void

 timedout()
 {
 timedout()
 {

-       fprintf(stderr, "Login timed out after %d seconds\n", timeout);
+       (void)fprintf(stderr, "Login timed out after %d seconds\n", timeout);

        exit(0);
 }
 
        exit(0);
 }
 

-rootterm(tty)
-       char *tty;
+rootterm(ttyn)
+       char *ttyn;

 {
        struct ttyent *t;
 
 {
        struct ttyent *t;
 

-       return((t = getttynam(tty)) && t->ty_status&TTY_SECURE);
+       return((t = getttynam(ttyn)) && t->ty_status&TTY_SECURE);

 }
 
 }
 

-int motdinterrupt;
+jmp_buf motdinterrupt;
+

 motd()
 {
 motd()
 {

-       register int ch;
-       FILE *fp;
-       int (*oldint)(), sigint();
+       register int fd, nchars;
+       sig_t oldint;
+       void sigint();
+       char tbuf[8192];

 
 

-       if ((fp = fopen(MOTDFILE, "r")) == NULL)
+       if ((fd = open(_PATH_MOTDFILE, O_RDONLY, 0)) < 0)

                return;
        oldint = signal(SIGINT, sigint);
                return;
        oldint = signal(SIGINT, sigint);

-       while ((ch = getc(fp)) != EOF && !motdinterrupt)
-               (void)putchar(ch);
+       if (setjmp(motdinterrupt) == 0)
+               while ((nchars = read(fd, tbuf, sizeof(tbuf))) > 0)
+                       (void)write(fileno(stdout), tbuf, nchars);

        (void)signal(SIGINT, oldint);
        (void)signal(SIGINT, oldint);

-       if (motdinterrupt)
-               fpurge(fp);
-       (void)fclose(fp);
+       (void)close(fd);

 }
 
 }
 

+void

 sigint()
 {
 sigint()
 {

-       motdinterrupt = 1;
+       longjmp(motdinterrupt, 1);

 }
 
 checknologin()
 {
        register int fd, nchars;
 }
 
 checknologin()
 {
        register int fd, nchars;

-       char tbuf[1024];
+       char tbuf[8192];

 
 

-       if ((fd = open(NOLOGIN, O_RDONLY, 0)) >= 0) {
+       if ((fd = open(_PATH_NOLOGIN, O_RDONLY, 0)) >= 0) {

                while ((nchars = read(fd, tbuf, sizeof(tbuf))) > 0)
                        (void)write(fileno(stdout), tbuf, nchars);
                sleepexit(0);
        }
 }
 
                while ((nchars = read(fd, tbuf, sizeof(tbuf))) > 0)
                        (void)write(fileno(stdout), tbuf, nchars);
                sleepexit(0);
        }
 }
 

-dolastlog(quiet, tty)
+dolastlog(quiet)

        int quiet;
        int quiet;

-       char *tty;

 {
        struct lastlog ll;
        int fd;
 {
        struct lastlog ll;
        int fd;

+       char *ctime();

 
 

-       if ((fd = open(LASTLOG, O_RDWR, 0)) >= 0) {
-               (void)lseek(fd, (long)pwd->pw_uid * sizeof(ll), L_SET);
+       if ((fd = open(_PATH_LASTLOG, O_RDWR, 0)) >= 0) {
+               (void)lseek(fd, (off_t)pwd->pw_uid * sizeof(ll), L_SET);

                if (!quiet) {
                        if (read(fd, (char *)&ll, sizeof(ll)) == sizeof(ll) &&
                            ll.ll_time != 0) {
                if (!quiet) {
                        if (read(fd, (char *)&ll, sizeof(ll)) == sizeof(ll) &&
                            ll.ll_time != 0) {

-                               printf("Last login: %.*s ",
+                               (void)printf("Last login: %.*s ",

                                    24-5, (char *)ctime(&ll.ll_time));
                                if (*ll.ll_host != '\0')
                                    24-5, (char *)ctime(&ll.ll_time));
                                if (*ll.ll_host != '\0')

-                                       printf("from %.*s\n",
+                                       (void)printf("from %.*s\n",

                                            sizeof(ll.ll_host), ll.ll_host);
                                else
                                            sizeof(ll.ll_host), ll.ll_host);
                                else

-                                       printf("on %.*s\n",
+                                       (void)printf("on %.*s\n",

                                            sizeof(ll.ll_line), ll.ll_line);
                        }
                                            sizeof(ll.ll_line), ll.ll_line);
                        }

-                       (void)lseek(fd, (long)pwd->pw_uid * sizeof(ll), L_SET);
+                       (void)lseek(fd, (off_t)pwd->pw_uid * sizeof(ll), L_SET);

                }
                }

+               bzero((void *)&ll, sizeof(ll));

                (void)time(&ll.ll_time);
                strncpy(ll.ll_line, tty, sizeof(ll.ll_line));
                (void)time(&ll.ll_time);
                strncpy(ll.ll_line, tty, sizeof(ll.ll_line));

-               strncpy(ll.ll_host, hostname, sizeof(ll.ll_host));
+               if (hostname)
+                       strncpy(ll.ll_host, hostname, sizeof(ll.ll_host));

                (void)write(fd, (char *)&ll, sizeof(ll));
                (void)close(fd);
        }
 }
 
                (void)write(fd, (char *)&ll, sizeof(ll));
                (void)close(fd);
        }
 }
 

+badlogin(name)
+       char *name;
+{
+       if (failures == 0)
+               return;
+       if (hostname) {
+               syslog(LOG_NOTICE, "%d LOGIN FAILURE%s FROM %s",
+                   failures, failures > 1 ? "S" : "", hostname);
+               syslog(LOG_AUTHPRIV|LOG_NOTICE,
+                   "%d LOGIN FAILURE%s FROM %s, %s",
+                   failures, failures > 1 ? "S" : "", hostname, name);
+       } else {
+               syslog(LOG_NOTICE, "%d LOGIN FAILURE%s ON %s",
+                   failures, failures > 1 ? "S" : "", tty);
+               syslog(LOG_AUTHPRIV|LOG_NOTICE,
+                   "%d LOGIN FAILURE%s ON %s, %s",
+                   failures, failures > 1 ? "S" : "", tty, name);
+       }
+}
+

 #undef UNKNOWN
 #define        UNKNOWN "su"
 
 #undef UNKNOWN
 #define        UNKNOWN "su"
 


@@ -487,72 +574,6 @@ stypeof(ttyid)
        return(ttyid && (t = getttynam(ttyid)) ? t->ty_type : UNKNOWN);
 }
 
        return(ttyid && (t = getttynam(ttyid)) ? t->ty_type : UNKNOWN);
 }
 

-doremotelogin(host)
-       char *host;
-{
-       static char lusername[UT_NAMESIZE+1];
-       char rusername[UT_NAMESIZE+1];
-
-       getstr(rusername, sizeof(rusername), "remuser");
-       getstr(lusername, sizeof(lusername), "locuser");
-       getstr(term, sizeof(term), "Terminal type");
-       username = lusername;
-       if (getuid()) {
-               pwd = &nouser;
-               return(-1);
-       }
-       pwd = getpwnam(username);
-       if (pwd == NULL) {
-               pwd = &nouser;
-               return(-1);
-       }
-       return(ruserok(host, (pwd->pw_uid == 0), rusername, username));
-}
-
-getstr(buf, cnt, err)
-       char *buf, *err;
-       int cnt;
-{
-       char ch;
-
-       do {
-               if (read(0, &ch, sizeof(ch)) != sizeof(ch))
-                       exit(1);
-               if (--cnt < 0) {
-                       fprintf(stderr, "%s too long\r\n", err);
-                       sleepexit(1);
-               }
-               *buf++ = ch;
-       } while (ch);
-}
-
-char *speeds[] = {
-       "0", "50", "75", "110", "134", "150", "200", "300", "600",
-       "1200", "1800", "2400", "4800", "9600", "19200", "38400",
-};
-#define        NSPEEDS (sizeof(speeds) / sizeof(speeds[0]))
-
-doremoteterm(tp)
-       struct sgttyb *tp;
-{
-       register char *cp = index(term, '/'), **cpp;
-       char *speed;
-
-       if (cp) {
-               *cp++ = '\0';
-               speed = cp;
-               cp = index(speed, '/');
-               if (cp)
-                       *cp++ = '\0';
-               for (cpp = speeds; cpp < &speeds[NSPEEDS]; cpp++)
-                       if (strcmp(*cpp, speed) == 0) {
-                               tp->sg_ispeed = tp->sg_ospeed = cpp-speeds;
-                               break;
-                       }
-       }
-       tp->sg_flags = ECHO|CRMOD|ANYP|XTABS;
-}
-

 sleepexit(eval)
        int eval;
 {
 sleepexit(eval)
        int eval;
 {