BSD 4_4_Lite1 release

[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 1d81da5..ef75733 100644 (file)
--- a/usr/src/usr.bin/login/login.c
+++ b/usr/src/usr.bin/login/login.c
@@ -1,28 +1,44 @@
-/*
- * Copyright (c) 1980, 1987, 1988 The Regents of the University of California.
- * All rights reserved.
+/*-
+ * Copyright (c) 1980, 1987, 1988, 1991, 1993, 1994
+ *     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.

  *
  *

- * Redistribution and use in source and binary forms are permitted
- * provided that the above copyright notice and this paragraph are
- * duplicated in all such forms and that any documentation,
- * advertising materials, and other materials related to such
- * distribution and use acknowledge that the software was developed
- * by the University of California, Berkeley.  The name of the
- * University may not be used to endorse or promote products derived
- * from this software without specific prior written permission.
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
- * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ * 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
  */
 
 #ifndef lint

-char copyright[] =
-"@(#) Copyright (c) 1980, 1987, 1988 The Regents of the University of California.\n\
- All rights reserved.\n";
+static char copyright[] =
+"@(#) Copyright (c) 1980, 1987, 1988, 1991, 1993, 1994\n\
+       The Regents of the University of California.  All rights reserved.\n";

 #endif /* not lint */
 
 #ifndef lint
 #endif /* not lint */
 
 #ifndef lint

-static char sccsid[] = "@(#)login.c    5.34 (Berkeley) %G%";
+static char sccsid[] = "@(#)login.c    8.4 (Berkeley) 4/2/94";

 #endif /* not lint */
 
 /*
 #endif /* not lint */
 
 /*


@@ -32,106 +48,111 @@ static char sccsid[] = "@(#)login.c       5.34 (Berkeley) %G%";
  */
 
 #include <sys/param.h>
  */
 
 #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/ioctl.h>

 
 

-#include <utmp.h>
-#include <signal.h>
-#include <lastlog.h>
+#include <err.h>

 #include <errno.h>
 #include <errno.h>

-#include <ttyent.h>
-#include <syslog.h>

 #include <grp.h>
 #include <pwd.h>
 #include <setjmp.h>
 #include <grp.h>
 #include <pwd.h>
 #include <setjmp.h>

+#include <signal.h>

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

-#include <strings.h>
+#include <stdlib.h>
+#include <string.h>
+#include <syslog.h>
+#include <ttyent.h>
+#include <tzfile.h>
+#include <unistd.h>
+#include <utmp.h>

 
 

-#define        TTYGRPNAME      "tty"           /* name of group to own ttys */
+#include "pathnames.h"
+
+void    badlogin __P((char *));
+void    checknologin __P((void));
+void    dolastlog __P((int));
+void    getloginname __P((void));
+void    motd __P((void));
+int     rootterm __P((char *));
+void    sigint __P((int));
+void    sleepexit __P((int));
+char   *stypeof __P((char *));
+void    timedout __P((int));
+#ifdef KERBEROS
+int     klogin __P((struct passwd *, char *, char *, char *));
+#endif

 
 

-#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"
+extern void login __P((struct utmp *));
+
+#define        TTYGRPNAME      "tty"           /* name of group to own ttys */

 
 /*
  * This bounds the time given to login.  Not a define so it can
  * be patched on machines where it's too small.
  */
 
 /*
  * 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;
+u_int  timeout = 300;
+
+#ifdef KERBEROS
+int    notickets = 1;
+char   *instance;
+char   *krbtkfile_env;
+int    authok;
+#endif

 
 struct passwd *pwd;
 int    failures;
 
 struct passwd *pwd;
 int    failures;

-char   term[64], *hostname, *username, *tty;
-
-struct sgttyb sgttyb;
-struct tchars tc = {
-       CINTR, CQUIT, CSTART, CSTOP, CEOT, CBRK
-};
-struct ltchars ltc = {
-       CSUSP, CDSUSP, CRPRNT, CFLUSH, CWERASE, CLNEXT
-};
-
-char *months[] =
-       { "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug",
-         "Sep", "Oct", "Nov", "Dec" };
+char   term[64], *envinit[1], *hostname, *username, *tty;

 
 

+int

 main(argc, argv)
        int argc;
 main(argc, argv)
        int argc;

-       char **argv;
+       char *argv[];

 {
 {

-       extern int errno, optind;
-       extern char *optarg, **environ;
-       struct timeval tp;
-       struct tm *ttp;
+       extern char **environ;

        struct group *gr;
        struct group *gr;

-       register int ch;
-       register char *p;
-       int ask, fflag, hflag, pflag, cnt;
-       int quietlog, passwd_req, ioctlval, timedout();
-       char *domain, *salt, *envinit[1], *ttyn, *pp;
-       char tbuf[MAXPATHLEN + 2];
-       char *ctime(), *ttyname(), *stypeof(), *crypt(), *getpass();
-       time_t time();
-       off_t lseek();
+       struct stat st;
+       struct timeval tp;
+       struct utmp utmp;
+       int ask, ch, cnt, fflag, hflag, pflag, quietlog, rootlogin, rval;
+       uid_t uid;
+       char *domain, *p, *salt, *ttyn;
+       char tbuf[MAXPATHLEN + 2], tname[sizeof(_PATH_TTY) + 10];
+       char localhost[MAXHOSTNAMELEN];

 
        (void)signal(SIGALRM, timedout);
 
        (void)signal(SIGALRM, timedout);

-       (void)alarm((u_int)timeout);
+       (void)alarm(timeout);

        (void)signal(SIGQUIT, SIG_IGN);
        (void)signal(SIGINT, SIG_IGN);
        (void)setpriority(PRIO_PROCESS, 0, 0);
        (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

-        * -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 = strchr(localhost, '.');

 
        fflag = hflag = pflag = 0;
 
        fflag = hflag = pflag = 0;

-       passwd_req = 1;
+       uid = getuid();

        while ((ch = getopt(argc, argv, "fh:p")) != EOF)
                switch (ch) {
                case 'f':
                        fflag = 1;
                        break;
                case 'h':
        while ((ch = getopt(argc, argv, "fh:p")) != EOF)
                switch (ch) {
                case 'f':
                        fflag = 1;
                        break;
                case 'h':

-                       if (getuid()) {
-                               fprintf(stderr,
-                                   "login: -h for super-user only.\n");
-                               exit(1);
-                       }
+                       if (uid)
+                               errx(1, "-h option: %s", strerror(EPERM));

                        hflag = 1;
                        hflag = 1;

-                       if (domain && (p = index(optarg, '.')) &&
+                       if (domain && (p = strchr(optarg, '.')) &&

                            strcasecmp(p, domain) == 0)
                                *p = 0;
                        hostname = optarg;
                            strcasecmp(p, domain) == 0)
                                *p = 0;
                        hostname = optarg;


@@ -141,53 +162,54 @@ main(argc, argv)
                        break;
                case '?':
                default:
                        break;
                case '?':
                default:

-                       fprintf(stderr, "usage: login [-fp] [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) {
                username = *argv;
                ask = 0;
        } else
                ask = 1;
 
        if (*argv) {
                username = *argv;
                ask = 0;
        } else
                ask = 1;
 

-       ioctlval = 0;
-       (void)ioctl(0, TIOCLSET, &ioctlval);
-       (void)ioctl(0, TIOCNXCL, 0);
-       (void)fcntl(0, F_SETFL, ioctlval);
-       (void)ioctl(0, TIOCGETP, &sgttyb);
-       sgttyb.sg_erase = CERASE;
-       sgttyb.sg_kill = CKILL;
-       (void)ioctl(0, TIOCSLTC, &ltc);
-       (void)ioctl(0, TIOCSETC, &tc);
-       (void)ioctl(0, TIOCSETP, &sgttyb);
-

        for (cnt = getdtablesize(); cnt > 2; cnt--)
        for (cnt = getdtablesize(); cnt > 2; cnt--)

-               close(cnt);
+               (void)close(cnt);

 
 

-       ttyn = ttyname(0);
-       if (ttyn == NULL || *ttyn == '\0')
-               ttyn = "/dev/tty??";
-       if (tty = rindex(ttyn, '/'))
+       ttyn = ttyname(STDIN_FILENO);
+       if (ttyn == NULL || *ttyn == '\0') {
+               (void)snprintf(tname, sizeof(tname), "%s??", _PATH_TTY);
+               ttyn = tname;
+       }
+       if (tty = strrchr(ttyn, '/'))

                ++tty;
        else
                tty = ttyn;
 
                ++tty;
        else
                tty = ttyn;
 

-       openlog("login", LOG_ODELAY, LOG_AUTH);
-

        for (cnt = 0;; ask = 1) {
        for (cnt = 0;; ask = 1) {

-               ioctlval = 0;
-               (void)ioctl(0, TIOCSETD, &ioctlval);
-

                if (ask) {
                        fflag = 0;
                        getloginname();
                }
                if (ask) {
                        fflag = 0;
                        getloginname();
                }

+               rootlogin = 0;
+#ifdef KERBEROS
+               if ((instance = strchr(username, '.')) != NULL) {
+                       if (strncmp(instance, ".root", 5) == 0)
+                               rootlogin = 1;
+                       *instance++ = '\0';
+               } else
+                       instance = "";
+#endif
+               if (strlen(username) > UT_NAMESIZE)
+                       username[UT_NAMESIZE] = '\0';
+

                /*
                /*

-                * Note if trying multiple user names;
-                * log failures for previous user name,
-                * but don't bother logging one failure
+                * 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 (failures && strcmp(tbuf, username)) {
                 * for nonexistent name (mistyped username).
                 */
                if (failures && strcmp(tbuf, username)) {


@@ -196,49 +218,77 @@ main(argc, argv)
                        failures = 0;
                }
                (void)strcpy(tbuf, username);
                        failures = 0;
                }
                (void)strcpy(tbuf, username);

+

                if (pwd = getpwnam(username))
                        salt = pwd->pw_passwd;
                else
                        salt = "xx";
 
                if (pwd = getpwnam(username))
                        salt = pwd->pw_passwd;
                else
                        salt = "xx";
 

-               /* if user not super-user, check for disabled logins */
-               if (pwd == NULL || pwd->pw_uid)
-                       checknologin();
-

                /*
                /*

-                * Disallow automatic login to root; if not invoked by
-                * root, disallow if the uid's differ.
+                * 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 (fflag && pwd) {
-                       int uid = getuid();
-
-                       passwd_req = pwd->pw_uid == 0 ||
-                           (uid && uid != pwd->pw_uid);
+               if (pwd && (*pwd->pw_passwd == '\0' ||
+                   fflag && (uid == 0 || uid == pwd->pw_uid)))
+                       break;
+               fflag = 0;
+               if (pwd && pwd->pw_uid == 0)
+                       rootlogin = 1;
+
+               (void)setpriority(PRIO_PROCESS, 0, -4);
+
+               p = getpass("Password:");
+
+               if (pwd) {
+#ifdef KERBEROS
+                       rval = klogin(pwd, instance, localhost, p);
+                       if (rval != 0 && rootlogin && pwd->pw_uid != 0)
+                               rootlogin = 0;
+                       if (rval == 0)
+                               authok = 1;
+                       else if (rval == 1)
+                               rval = strcmp(crypt(p, salt), pwd->pw_passwd);
+#else
+                       rval = strcmp(crypt(p, salt), pwd->pw_passwd);
+#endif

                }
                }

+               memset(p, 0, strlen(p));
+
+               (void)setpriority(PRIO_PROCESS, 0, 0);

 
                /*
 
                /*

-                * If no pre-authentication and a password exists
-                * for this user, prompt for one and verify it.
+                * If trying to log in as root without Kerberos,
+                * but with insecure terminal, refuse the login attempt.

                 */
                 */

-               if (!passwd_req || (pwd && !*pwd->pw_passwd))
-                       break;
-
-               setpriority(PRIO_PROCESS, 0, -4);
-               pp = getpass("Password:");
-               p = crypt(pp, salt);
-               setpriority(PRIO_PROCESS, 0, 0);
+#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)
+                               syslog(LOG_NOTICE,
+                                   "LOGIN %s REFUSED FROM %s ON TTY %s",
+                                   pwd->pw_name, hostname, tty);
+                       else
+                               syslog(LOG_NOTICE,
+                                   "LOGIN %s REFUSED ON TTY %s",
+                                    pwd->pw_name, tty);
+                       continue;
+               }

 
 

-               (void) bzero(pp, strlen(pp));
-               if (pwd && !strcmp(p, pwd->pw_passwd))
+               if (pwd && !rval)

                        break;
 
                        break;
 

-               printf("Login incorrect\n");
+               (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);
                failures++;
                /* we allow 10 tries, but after 3 we start backing off */
                if (++cnt > 3) {
                        if (cnt >= 10) {
                                badlogin(username);

-                               (void)ioctl(0, TIOCHPCL, (struct sgttyb *)NULL);

                                sleepexit(1);
                        }
                        sleep((u_int)((cnt - 3) * 5));
                                sleepexit(1);
                        }
                        sleep((u_int)((cnt - 3) * 5));


@@ -248,135 +298,103 @@ main(argc, argv)
        /* 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 == 0 && !rootterm(tty)) {
-               if (hostname)
-                       syslog(LOG_NOTICE, "ROOT LOGIN REFUSED FROM %s",
-                           hostname);
-               else
-                       syslog(LOG_NOTICE, "ROOT LOGIN REFUSED ON %s", tty);
-               printf("Login incorrect\n");
-               sleepexit(1);
-       }
+       endpwent();

 
 

-       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);
-       }
+       /* 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");

        }
 
        }
 

-#define        TWOWEEKS        (14*24*60*60)
+       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) {
        if (pwd->pw_change || pwd->pw_expire)
                (void)gettimeofday(&tp, (struct timezone *)NULL);
        if (pwd->pw_change)
                if (tp.tv_sec >= pwd->pw_change) {

-                       printf("Sorry -- your password has expired.\n");
+                       (void)printf("Sorry -- your password has expired.\n");

                        sleepexit(1);
                        sleepexit(1);

-               }
-               else if (tp.tv_sec - pwd->pw_change < TWOWEEKS) {
-                       ttp = localtime(&pwd->pw_change);
-                       printf("Warning: your password expires on %s %d, 19%d\n",
-                           months[ttp->tm_mon], ttp->tm_mday, ttp->tm_year);
-               }
+               } else if (pwd->pw_change - tp.tv_sec <
+                   2 * DAYSPERWEEK * SECSPERDAY && !quietlog)
+                       (void)printf("Warning: your password expires on %s",
+                           ctime(&pwd->pw_change));

        if (pwd->pw_expire)
                if (tp.tv_sec >= pwd->pw_expire) {
        if (pwd->pw_expire)
                if (tp.tv_sec >= pwd->pw_expire) {

-                       printf("Sorry -- your account has expired.\n");
+                       (void)printf("Sorry -- your account has expired.\n");

                        sleepexit(1);
                        sleepexit(1);

-               }
-               else if (tp.tv_sec - pwd->pw_expire < TWOWEEKS) {
-                       ttp = localtime(&pwd->pw_expire);
-                       printf("Warning: your account expires on %s %d, 19%d\n",
-                           months[ttp->tm_mon], ttp->tm_mday, ttp->tm_year);
-               }
-
-       /* nothing else left to fail -- really log in */
-       {
-               struct utmp utmp;
-
-               bzero((char *)&utmp, sizeof(utmp));
-               (void)time(&utmp.ut_time);
-               strncpy(utmp.ut_name, username, sizeof(utmp.ut_name));
-               if (hostname)
-                       strncpy(utmp.ut_host, hostname, sizeof(utmp.ut_host));
-               strncpy(utmp.ut_line, tty, sizeof(utmp.ut_line));
-               login(&utmp);
-       }
+               } 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. */
+       memset((void *)&utmp, 0, sizeof(utmp));
+       (void)time(&utmp.ut_time);
+       (void)strncpy(utmp.ut_name, username, sizeof(utmp.ut_name));
+       if (hostname)
+               (void)strncpy(utmp.ut_host, hostname, sizeof(utmp.ut_host));
+       (void)strncpy(utmp.ut_line, tty, sizeof(utmp.ut_line));
+       login(&utmp);

 
 

-       quietlog = access(HUSHLOGIN, F_OK) == 0;

        dolastlog(quietlog);
 
        dolastlog(quietlog);
 

-       if (!hflag) {                                   /* XXX */
-               static struct winsize win = { 0, 0, 0, 0 };
-
-               (void)ioctl(0, TIOCSWINSZ, &win);
-       }
-

        (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')
        if (*pwd->pw_shell == '\0')

-               pwd->pw_shell = BSHELL;
-       /* turn on new line discipline for the csh */
-       else if (!strcmp(pwd->pw_shell, "/bin/csh")) {
-               ioctlval = NTTYDISC;
-               (void)ioctl(0, TIOCSETD, &ioctlval);
-       }
+               pwd->pw_shell = _PATH_BSHELL;

 
 

-       /* destroy environment unless user has requested preservation */
+       /* Destroy environment unless user has requested its preservation. */

        if (!pflag)
                environ = envinit;
        (void)setenv("HOME", pwd->pw_dir, 1);
        (void)setenv("SHELL", pwd->pw_shell, 1);
        if (term[0] == '\0')
        if (!pflag)
                environ = envinit;
        (void)setenv("HOME", pwd->pw_dir, 1);
        (void)setenv("SHELL", pwd->pw_shell, 1);
        if (term[0] == '\0')

-               strncpy(term, stypeof(tty), sizeof(term));
+               (void)strncpy(term, stypeof(tty), sizeof(term));

        (void)setenv("TERM", term, 0);
        (void)setenv("TERM", term, 0);

+       (void)setenv("LOGNAME", pwd->pw_name, 1);

        (void)setenv("USER", pwd->pw_name, 1);
        (void)setenv("USER", pwd->pw_name, 1);

-       (void)setenv("PATH", "/usr/ucb:/bin:/usr/bin:", 0);
+       (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 ON %s FROM %s",
-                           tty, hostname);
+                       syslog(LOG_NOTICE, "ROOT LOGIN (%s) ON %s FROM %s",
+                           username, tty, hostname);

                else
                else

-                       syslog(LOG_NOTICE, "ROOT LOGIN ON %s", tty);
+                       syslog(LOG_NOTICE, "ROOT LOGIN (%s) ON %s", username, tty);

 
 

-       if (!quietlog) {
-               struct stat st;
+#ifdef KERBEROS
+       if (!quietlog && notickets == 1)
+               (void)printf("Warning: no Kerberos tickets issued.\n");
+#endif

 
 

+       if (!quietlog) {
+               (void)printf("%s\n\t%s  %s\n\n",
+           "Copyright (c) 1980, 1983, 1986, 1988, 1990, 1991, 1993, 1994",
+                   "The Regents of the University of California. ",
+                   "All rights reserved.");

                motd();
                motd();

-               (void)sprintf(tbuf, "%s/%s", MAILDIR, pwd->pw_name);
+               (void)snprintf(tbuf,
+                   sizeof(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 " : "");
        }
 


@@ -386,33 +404,48 @@ main(argc, argv)
        (void)signal(SIGTSTP, SIG_IGN);
 
        tbuf[0] = '-';
        (void)signal(SIGTSTP, SIG_IGN);
 
        tbuf[0] = '-';

-       strcpy(tbuf + 1, (p = rindex(pwd->pw_shell, '/')) ?
+       (void)strcpy(tbuf + 1, (p = strrchr(pwd->pw_shell, '/')) ?

            p + 1 : 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);

-       fprintf(stderr, "login: no shell: ");
-       perror(pwd->pw_shell);
-       exit(0);
+       err(1, "%s", pwd->pw_shell);

 }
 
 }
 

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

 getloginname()
 {
 getloginname()
 {

-       register int ch;
-       register char *p;
-       static char nbuf[UT_NAMESIZE + 1];
+       int ch;
+       char *p;
+       static char nbuf[NBUFSIZ];

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

-               printf("login: ");
+               (void)printf("login: ");

                for (p = nbuf; (ch = getchar()) != '\n'; ) {
                        if (ch == EOF) {
                                badlogin(username);
                                exit(0);
                        }
                for (p = nbuf; (ch = getchar()) != '\n'; ) {
                        if (ch == EOF) {
                                badlogin(username);
                                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';
                                    "login names may not start with '-'.\n");
                        else {
                                *p = '\0';


@@ -422,29 +455,25 @@ getloginname()
        }
 }
 
        }
 }
 

-timedout()
-{
-       fprintf(stderr, "Login timed out after %d seconds\n", timeout);
-       exit(0);
-}
-
+int

 rootterm(ttyn)
        char *ttyn;
 {
        struct ttyent *t;
 
 rootterm(ttyn)
        char *ttyn;
 {
        struct ttyent *t;
 

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

 }
 
 jmp_buf motdinterrupt;
 
 }
 
 jmp_buf motdinterrupt;
 

+void

 motd()
 {
 motd()
 {

-       register int fd, nchars;
-       int (*oldint)(), sigint();
+       int fd, nchars;
+       sig_t oldint;

        char tbuf[8192];
 
        char tbuf[8192];
 

-       if ((fd = open(MOTDFILE, O_RDONLY, 0)) < 0)
+       if ((fd = open(_PATH_MOTDFILE, O_RDONLY, 0)) < 0)

                return;
        oldint = signal(SIGINT, sigint);
        if (setjmp(motdinterrupt) == 0)
                return;
        oldint = signal(SIGINT, sigint);
        if (setjmp(motdinterrupt) == 0)


@@ -454,67 +483,93 @@ motd()
        (void)close(fd);
 }
 
        (void)close(fd);
 }
 

-sigint()
+/* ARGSUSED */
+void
+sigint(signo)
+       int signo;

 {
 {

+

        longjmp(motdinterrupt, 1);
 }
 
        longjmp(motdinterrupt, 1);
 }
 

+/* ARGSUSED */
+void
+timedout(signo)
+       int signo;
+{
+
+       (void)fprintf(stderr, "Login timed out after %d seconds\n", timeout);
+       exit(0);
+}
+
+void

 checknologin()
 {
 checknologin()
 {

-       register int fd, nchars;
+       int fd, nchars;

        char tbuf[8192];
 
        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);
        }
 }
 

+void

 dolastlog(quiet)
        int quiet;
 {
        struct lastlog ll;
        int fd;
 dolastlog(quiet)
        int quiet;
 {
        struct lastlog ll;
        int fd;

-       char *ctime();

 
 

-       if ((fd = open(LASTLOG, O_RDWR, 0)) >= 0) {
+       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) {
                (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) {

-                               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",
-                                           sizeof(ll.ll_host), ll.ll_host);
+                                       (void)printf("from %.*s\n",
+                                           (int)sizeof(ll.ll_host),
+                                           ll.ll_host);

                                else
                                else

-                                       printf("on %.*s\n",
-                                           sizeof(ll.ll_line), ll.ll_line);
+                                       (void)printf("on %.*s\n",
+                                           (int)sizeof(ll.ll_line),
+                                           ll.ll_line);

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

-               bzero((char *)&ll, sizeof(ll));
+               memset((void *)&ll, 0, sizeof(ll));

                (void)time(&ll.ll_time);
                (void)time(&ll.ll_time);

-               strncpy(ll.ll_line, tty, sizeof(ll.ll_line));
+               (void)strncpy(ll.ll_line, tty, sizeof(ll.ll_line));

                if (hostname)
                if (hostname)

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

+void

 badlogin(name)
        char *name;
 {
 badlogin(name)
        char *name;
 {

+

        if (failures == 0)
                return;
        if (failures == 0)
                return;

-       if (hostname)
-               syslog(LOG_NOTICE, "%d LOGIN FAILURE%s FROM %s, %s",
+       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);
                    failures, failures > 1 ? "S" : "", hostname, name);

-       else
-               syslog(LOG_NOTICE, "%d LOGIN FAILURE%s ON %s, %s",
+       } 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);
                    failures, failures > 1 ? "S" : "", tty, name);

+       }

 }
 
 #undef UNKNOWN
 }
 
 #undef UNKNOWN


@@ -526,29 +581,14 @@ stypeof(ttyid)
 {
        struct ttyent *t;
 
 {
        struct ttyent *t;
 

-       return(ttyid && (t = getttynam(ttyid)) ? t->ty_type : UNKNOWN);
-}
-
-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);
+       return (ttyid && (t = getttynam(ttyid)) ? t->ty_type : UNKNOWN);

 }
 
 }
 

+void

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

-       sleep((u_int)5);
+
+       (void)sleep(5);

        exit(eval);
 }
        exit(eval);
 }