BSD 4_3_Net_2 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 6accb11..261de5f 100644 (file)
--- a/usr/src/usr.bin/login/login.c
+++ b/usr/src/usr.bin/login/login.c
@@ -1,30 +1,44 @@
 /*-
 /*-

- * Copyright (c) 1980, 1987, 1988 The Regents of the University of California.
- * All rights reserved.
+ * Copyright (c) 1980, 1987, 1988, 1991 The Regents of the University
+ * of California.  All rights reserved.

  *
  *

- * Redistribution and use in source and binary forms are permitted provided
- * that: (1) source distributions retain this entire copyright notice and
- * comment, and (2) distributions including binaries display the following
- * acknowledgement:  ``This product includes software developed by the
- * University of California, Berkeley and its contributors'' in the
- * documentation or other materials provided with the distribution and in
- * all advertising materials mentioning features or use of this software.
- * 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ * 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, 1987, 1988 The 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";
 #endif /* not lint */
 
 #ifndef lint
  All rights reserved.\n";
 #endif /* not lint */
 
 #ifndef lint

-static char sccsid[] = "@(#)login.c    5.63 (Berkeley) 6/29/90";
+static char sccsid[] = "@(#)login.c    5.73 (Berkeley) 6/29/91";

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


@@ -38,7 +52,6 @@ static char sccsid[] = "@(#)login.c   5.63 (Berkeley) 6/29/90";
 #include <sys/time.h>
 #include <sys/resource.h>
 #include <sys/file.h>
 #include <sys/time.h>
 #include <sys/resource.h>
 #include <sys/file.h>

-#include <sgtty.h>

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


@@ -60,8 +73,12 @@ static char sccsid[] = "@(#)login.c  5.63 (Berkeley) 6/29/90";
  * be patched on machines where it's too small.
  */
 int    timeout = 300;
  * be patched on machines where it's too small.
  */
 int    timeout = 300;

+int    rootlogin;

 #ifdef KERBEROS
 int    notickets = 1;
 #ifdef KERBEROS
 int    notickets = 1;

+char   *instance;
+char   *krbtkfile_env;
+int    authok;

 #endif
 
 struct passwd *pwd;
 #endif
 
 struct passwd *pwd;


@@ -118,7 +135,7 @@ main(argc, argv)
                case 'h':
                        if (uid) {
                                (void)fprintf(stderr,
                case 'h':
                        if (uid) {
                                (void)fprintf(stderr,

-                                   "login: -h for super-user only.\n");
+                                   "login: -h option: %s\n", strerror(EPERM));

                                exit(1);
                        }
                        hflag = 1;
                                exit(1);
                        }
                        hflag = 1;


@@ -135,15 +152,13 @@ main(argc, argv)
                        if (!uid)
                                syslog(LOG_ERR, "invalid flag %c", ch);
                        (void)fprintf(stderr,
                        if (!uid)
                                syslog(LOG_ERR, "invalid flag %c", ch);
                        (void)fprintf(stderr,

-                           "usage: login [-fp] [username]\n");
+                           "usage: login [-fp] [-h hostname] [username]\n");

                        exit(1);
                }
        argc -= optind;
        argv += optind;
        if (*argv) {
                username = *argv;
                        exit(1);
                }
        argc -= optind;
        argv += optind;
        if (*argv) {
                username = *argv;

-               if (strlen(username) > UT_NAMESIZE)
-                       username[UT_NAMESIZE] = '\0';

                ask = 0;
        } else
                ask = 1;
                ask = 0;
        } else
                ask = 1;


@@ -166,6 +181,19 @@ main(argc, argv)
                        fflag = 0;
                        getloginname();
                }
                        fflag = 0;
                        getloginname();
                }

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


@@ -193,12 +221,39 @@ main(argc, argv)
                    fflag && (uid == 0 || uid == pwd->pw_uid)))
                        break;
                fflag = 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)
+                               authok = 1;
+                       else if (rval == 1) {
+                               if (pwd->pw_uid != 0)
+                                       rootlogin = 0;
+                               rval = strcmp(crypt(p, salt), pwd->pw_passwd);
+                       }
+#else
+                       rval = strcmp(crypt(p, salt), pwd->pw_passwd);
+#endif
+               }
+               bzero(p, strlen(p));
+
+               (void)setpriority(PRIO_PROCESS, 0, 0);

 
                /*
 
                /*

-                * If trying to log in as root, but with insecure terminal,
-                * refuse the login attempt.
+                * If trying to log in as root without Kerberos,
+                * but with insecure terminal, refuse the login attempt.

                 */
                 */

-               if (pwd && pwd->pw_uid == 0 && !rootterm(tty)) {
+#ifdef KERBEROS
+               if (authok == 0)
+#endif
+               if (pwd && rootlogin && !rootterm(tty)) {

                        (void)fprintf(stderr,
                            "%s login refused on this terminal.\n",
                            pwd->pw_name);
                        (void)fprintf(stderr,
                            "%s login refused on this terminal.\n",
                            pwd->pw_name);


@@ -213,23 +268,6 @@ main(argc, argv)
                        continue;
                }
 
                        continue;
                }
 

-               (void)setpriority(PRIO_PROCESS, 0, -4);
-
-               p = getpass("Password:");
-
-               if (pwd) {
-#ifdef KERBEROS
-                       rval = klogin(pwd, localhost, p);
-                       if (rval == 1)
-                               rval = strcmp(crypt(p, salt), pwd->pw_passwd);
-#else
-                       rval = strcmp(crypt(p, salt), pwd->pw_passwd);
-#endif
-               }
-               bzero(p, strlen(p));
-
-               (void)setpriority(PRIO_PROCESS, 0, 0);
-

                if (pwd && !rval)
                        break;
 
                if (pwd && !rval)
                        break;
 


@@ -248,15 +286,14 @@ 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);
 

-       /* paranoia... */

        endpwent();
 
        /* if user not super-user, check for disabled logins */
        endpwent();
 
        /* if user not super-user, check for disabled logins */

-       if (pwd->pw_uid)
+       if (!rootlogin)

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

-               (void)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 = "/";


@@ -271,8 +308,7 @@ main(argc, argv)
                if (tp.tv_sec >= pwd->pw_change) {
                        (void)printf("Sorry -- your password has expired.\n");
                        sleepexit(1);
                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 <
+               } else if (pwd->pw_change - tp.tv_sec <

                    2 * DAYSPERWEEK * SECSPERDAY && !quietlog)
                        (void)printf("Warning: your password expires on %s",
                            ctime(&pwd->pw_expire));
                    2 * DAYSPERWEEK * SECSPERDAY && !quietlog)
                        (void)printf("Warning: your password expires on %s",
                            ctime(&pwd->pw_expire));


@@ -280,8 +316,7 @@ main(argc, argv)
                if (tp.tv_sec >= pwd->pw_expire) {
                        (void)printf("Sorry -- your account has expired.\n");
                        sleepexit(1);
                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 <
+               } else if (pwd->pw_expire - tp.tv_sec <

                    2 * DAYSPERWEEK * SECSPERDAY && !quietlog)
                        (void)printf("Warning: your account expires on %s",
                            ctime(&pwd->pw_expire));
                    2 * DAYSPERWEEK * SECSPERDAY && !quietlog)
                        (void)printf("Warning: your account expires on %s",
                            ctime(&pwd->pw_expire));


@@ -303,7 +338,6 @@ main(argc, argv)
 
        (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);


@@ -319,18 +353,23 @@ main(argc, argv)
        if (term[0] == '\0')
                strncpy(term, stypeof(tty), sizeof(term));
        (void)setenv("TERM", term, 0);
        if (term[0] == '\0')
                strncpy(term, stypeof(tty), sizeof(term));
        (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);
        (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 fflag is on, assume caller/authenticator has logged root login */
 
        if (tty[sizeof("tty")-1] == 'd')
                syslog(LOG_INFO, "DIALUP %s, %s", tty, pwd->pw_name);
        /* if fflag is on, assume caller/authenticator has logged root login */

-       if (pwd->pw_uid == 0 && fflag == 0)
+       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);

 
 #ifdef KERBEROS
        if (!quietlog && notickets == 1)
 
 #ifdef KERBEROS
        if (!quietlog && notickets == 1)


@@ -340,6 +379,9 @@ main(argc, argv)
        if (!quietlog) {
                struct stat st;
 
        if (!quietlog) {
                struct stat st;
 

+               printf(
+"Copyright (c) 1980,1983,1986,1988,1990,1991 The Regents of the University\n%s",
+"of California.  All rights reserved.\n\n");

                motd();
                (void)sprintf(tbuf, "%s/%s", _PATH_MAILDIR, pwd->pw_name);
                if (stat(tbuf, &st) == 0 && st.st_size != 0)
                motd();
                (void)sprintf(tbuf, "%s/%s", _PATH_MAILDIR, pwd->pw_name);
                if (stat(tbuf, &st) == 0 && st.st_size != 0)


@@ -360,18 +402,27 @@ main(argc, argv)
                syslog(LOG_ERR, "setlogin() failure: %m");
 
        /* discard permissions last so can't get killed and drop core */
                syslog(LOG_ERR, "setlogin() failure: %m");
 
        /* discard permissions last so can't get killed and drop core */

-       (void)setuid(pwd->pw_uid);
+       if (rootlogin)
+               (void) setuid(0);
+       else
+               (void) setuid(pwd->pw_uid);

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

-       (void)fprintf(stderr, "login: no shell: %s.\n", strerror(errno));
-       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 (;;) {
                (void)printf("login: ");
 
        for (;;) {
                (void)printf("login: ");


@@ -380,7 +431,7 @@ getloginname()
                                badlogin(username);
                                exit(0);
                        }
                                badlogin(username);
                                exit(0);
                        }

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

                                *p++ = ch;
                }
                if (p > nbuf)
                                *p++ = ch;
                }
                if (p > nbuf)


@@ -416,7 +467,7 @@ motd()
 {
        register int fd, nchars;
        sig_t oldint;
 {
        register int fd, nchars;
        sig_t oldint;

-       int sigint();
+       void sigint();

        char tbuf[8192];
 
        if ((fd = open(_PATH_MOTDFILE, O_RDONLY, 0)) < 0)
        char tbuf[8192];
 
        if ((fd = open(_PATH_MOTDFILE, O_RDONLY, 0)) < 0)


@@ -429,6 +480,7 @@ motd()
        (void)close(fd);
 }
 
        (void)close(fd);
 }
 

+void

 sigint()
 {
        longjmp(motdinterrupt, 1);
 sigint()
 {
        longjmp(motdinterrupt, 1);


@@ -484,12 +536,19 @@ badlogin(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