add protection against masquerading Kerberos server

[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 56b1890..c1ac218 100644 (file)
--- a/usr/src/usr.bin/login/login.c
+++ b/usr/src/usr.bin/login/login.c
@@ -22,7 +22,7 @@ char copyright[] =
 #endif /* not lint */
 
 #ifndef lint
 #endif /* not lint */
 
 #ifndef lint

-static char sccsid[] = "@(#)login.c    5.25 (Berkeley) %G%";
+static char sccsid[] = "@(#)login.c    5.41 (Berkeley) %G%";

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


@@ -33,7 +33,7 @@ static char sccsid[] = "@(#)login.c   5.25 (Berkeley) %G%";
  */
 
 #include <sys/param.h>
  */
 
 #include <sys/param.h>

-#include <sys/quota.h>
+#include <ufs/quota.h>

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


@@ -42,7 +42,6 @@ static char sccsid[] = "@(#)login.c   5.25 (Berkeley) %G%";
 
 #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 <errno.h>
 #include <ttyent.h>
 #include <syslog.h>


@@ -51,47 +50,56 @@ static char sccsid[] = "@(#)login.c 5.25 (Berkeley) %G%";
 #include <setjmp.h>
 #include <stdio.h>
 #include <strings.h>
 #include <setjmp.h>
 #include <stdio.h>
 #include <strings.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 *pwd;
-char term[64], *hostname, *username;
+struct passwd *pwd;
+int    failures;
+char   term[64], *hostname, *username, *tty;

 
 

-struct sgttyb sgttyb;
-struct tchars tc = {
+struct sgttyb sgttyb;
+struct tchars tc = {

        CINTR, CQUIT, CSTART, CSTOP, CEOT, CBRK
 };
        CINTR, CQUIT, CSTART, CSTOP, CEOT, CBRK
 };

-struct ltchars ltc = {
+struct ltchars ltc = {

        CSUSP, CDSUSP, CRPRNT, CFLUSH, CWERASE, CLNEXT
 };
 
        CSUSP, CDSUSP, CRPRNT, CFLUSH, CWERASE, CLNEXT
 };
 

+char *months[] =
+       { "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug",
+         "Sep", "Oct", "Nov", "Dec" };
+
+char *months[] =
+       { "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug",
+         "Sep", "Oct", "Nov", "Dec" };
+

 main(argc, argv)
        int argc;
        char **argv;
 {
        extern int errno, optind;
        extern char *optarg, **environ;
 main(argc, argv)
        int argc;
        char **argv;
 {
        extern int errno, optind;
        extern char *optarg, **environ;

+       struct timeval tp;
+       struct tm *ttp;
+       struct timeval tp;
+       struct tm *ttp;

        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 ask, fflag, hflag, pflag, rflag, cnt;

        int quietlog, passwd_req, ioctlval, timedout();
        int quietlog, passwd_req, ioctlval, timedout();

-       char *domain, *salt, *envinit[1], *ttyn, *tty;
-       char tbuf[MAXPATHLEN + 2];
-       char *ttyname(), *stypeof(), *crypt(), *getpass();
+       char *domain, *salt, *envinit[1], *ttyn, *pp;
+       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();
 


@@ -106,11 +114,14 @@ main(argc, argv)
         * -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 
         * -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 

-        * -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;
 
        fflag = hflag = pflag = rflag = 0;
        passwd_req = 1;


@@ -126,7 +137,7 @@ main(argc, argv)
                        break;
                case 'h':
                        if (getuid()) {
                        break;
                case 'h':
                        if (getuid()) {

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

                                    "login: -h for super-user only.\n");
                                exit(1);
                        }
                                    "login: -h for super-user only.\n");
                                exit(1);
                        }


@@ -137,7 +148,7 @@ main(argc, argv)
                        }
                        hflag = 1;
                        if (domain && (p = index(optarg, '.')) &&
                        }
                        hflag = 1;
                        if (domain && (p = index(optarg, '.')) &&

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

                                *p = 0;
                        hostname = optarg;
                        break;
                                *p = 0;
                        hostname = optarg;
                        break;


@@ -169,13 +180,19 @@ main(argc, argv)
                        break;
                case '?':
                default:
                        break;
                case '?':
                default:

-                       fprintf(stderr, "usage: login [-fp] [username]\n");
+                       (void)fprintf(stderr,
+                           "usage: login [-fp] [username]\n");

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

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

                username = *argv;
                username = *argv;

+               ask = 0;
+       } else
+               ask = 1;
+       if (rflag)
+               ask = 0;

 
        ioctlval = 0;
        (void)ioctl(0, TIOCLSET, &ioctlval);
 
        ioctlval = 0;
        (void)ioctl(0, TIOCLSET, &ioctlval);


@@ -199,8 +216,10 @@ main(argc, argv)
                close(cnt);
 
        ttyn = ttyname(0);
                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
        if (tty = rindex(ttyn, '/'))
                ++tty;
        else


@@ -208,14 +227,26 @@ main(argc, argv)
 
        openlog("login", LOG_ODELAY, LOG_AUTH);
 
 
        openlog("login", LOG_ODELAY, LOG_AUTH);
 

-       for (cnt = 0;; username = NULL) {
+       for (cnt = 0;; ask = 1) {

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

-               if (username == NULL) {
+               if (ask) {

                        fflag = 0;
                        getloginname();
                }
                        fflag = 0;
                        getloginname();
                }

+               /*
+                * 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)) {
+                       if (failures > (pwd ? 0 : 1))
+                               badlogin(tbuf);
+                       failures = 0;
+               }
+               (void)strcpy(tbuf, username);

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


@@ -237,59 +268,62 @@ main(argc, argv)
                }
 
                /*
                }
 
                /*

-                * If no remote login authentication and a password exists
+                * If no pre-authentication and a password exists

                 * for this user, prompt for one and verify it.
                 */
                 * for this user, prompt for one and verify it.
                 */

-               if (!passwd_req || pwd && !*pwd->pw_passwd)
+               if (!passwd_req || (pwd && !*pwd->pw_passwd))

                        break;
 
                setpriority(PRIO_PROCESS, 0, -4);
                        break;
 
                setpriority(PRIO_PROCESS, 0, -4);

-               p = crypt(getpass("Password:"), salt);
+               pp = getpass("Password:");
+               p = crypt(pp, salt);

                setpriority(PRIO_PROCESS, 0, 0);
                setpriority(PRIO_PROCESS, 0, 0);

+
+               (void) bzero(pp, strlen(pp));

                if (pwd && !strcmp(p, pwd->pw_passwd))
                        break;
 
                if (pwd && !strcmp(p, pwd->pw_passwd))
                        break;
 

-               printf("Login incorrect\n");
-               if (++cnt >= 5) {
-                       if (hostname)
-                           syslog(LOG_ERR,
-                               "REPEATED LOGIN FAILURES ON %s FROM %.*s, %.*s",
-                               tty, UT_HOSTSIZE, hostname, UT_NAMESIZE,
-                               username);
-                       else
-                           syslog(LOG_ERR,
-                               "REPEATED LOGIN FAILURES ON %s, %.*s",
-                               tty, UT_NAMESIZE, username);
-                       (void)ioctl(0, TIOCHPCL, (struct sgttyb *)NULL);
-                       sleepexit(1);
+               (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);
+                               (void)ioctl(0, TIOCHPCL, (struct sgttyb *)NULL);
+                               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);
 

+       /* paranoia... */
+       endpwent();
+

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

                else
                else

-                       syslog(LOG_ERR, "ROOT LOGIN REFUSED ON %s", tty);
-               printf("Login incorrect\n");
+                       syslog(LOG_NOTICE, "ROOT LOGIN REFUSED ON %s", tty);
+               (void)printf("Login incorrect\n");

                sleepexit(1);
        }
 
        if (quota(Q_SETUID, pwd->pw_uid, 0, 0) < 0 && errno != EINVAL) {
                switch(errno) {
                case EUSERS:
                sleepexit(1);
        }
 
        if (quota(Q_SETUID, pwd->pw_uid, 0, 0) < 0 && errno != EINVAL) {
                switch(errno) {
                case EUSERS:

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

                "Too many users logged on already.\nTry again later.\n");
                        break;
                case EPROCLIM:
                "Too many users logged on already.\nTry again later.\n");
                        break;
                case EPROCLIM:

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

                            "You have too many processes running.\n");
                        break;
                default:
                            "You have too many processes running.\n");
                        break;
                default:


@@ -299,26 +333,75 @@ main(argc, argv)
        }
 
        if (chdir(pwd->pw_dir) < 0) {
        }
 
        if (chdir(pwd->pw_dir) < 0) {

-               printf("No directory %s!\n", pwd->pw_dir);
+               (void)printf("No 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)
+       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");
+                       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);
+               }
+       if (pwd->pw_expire)
+               if (tp.tv_sec >= pwd->pw_expire) {
+                       printf("Sorry -- your account has expired.\n");
+                       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);
+               }
+
+#define        TWOWEEKS        (14*24*60*60)
+       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 (tp.tv_sec - pwd->pw_change < TWOWEEKS && !quietlog) {
+                       ttp = localtime(&pwd->pw_change);
+                       (void)printf("Warning: your password expires on %s %d, %d\n",
+                           months[ttp->tm_mon], ttp->tm_mday, TM_YEAR_BASE + ttp->tm_year);
+               }
+       if (pwd->pw_expire)
+               if (tp.tv_sec >= pwd->pw_expire) {
+                       (void)printf("Sorry -- your account has expired.\n");
+                       sleepexit(1);
+               }
+               else if (tp.tv_sec - pwd->pw_expire < TWOWEEKS && !quietlog) {
+                       ttp = localtime(&pwd->pw_expire);
+                       (void)printf("Warning: your account expires on %s %d, %d\n",
+                           months[ttp->tm_mon], ttp->tm_mday, TM_YEAR_BASE + ttp->tm_year);
+               }
+

        /* nothing else left to fail -- really log in */
        {
                struct utmp utmp;
 
        /* 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));
                (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);
+       dolastlog(quietlog);

 
        if (!hflag && !rflag) {                                 /* XXX */
                static struct winsize win = { 0, 0, 0, 0 };
 
        if (!hflag && !rflag) {                                 /* XXX */
                static struct winsize win = { 0, 0, 0, 0 };


@@ -334,12 +417,11 @@ main(argc, argv)
        initgroups(username, pwd->pw_gid);
 
        quota(Q_DOWARN, pwd->pw_uid, (dev_t)-1, 0);
        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;
+               pwd->pw_shell = _PATH_BSHELL;

        /* turn on new line discipline for the csh */
        /* turn on new line discipline for the csh */

-       else if (!strcmp(pwd->pw_shell, "/bin/csh")) {
+       else if (!strcmp(pwd->pw_shell, _PATH_CSHELL)) {

                ioctlval = NTTYDISC;
                (void)ioctl(0, TIOCSETD, &ioctlval);
        }
                ioctlval = NTTYDISC;
                (void)ioctl(0, TIOCSETD, &ioctlval);
        }


@@ -353,24 +435,24 @@ main(argc, argv)
                strncpy(term, stypeof(tty), sizeof(term));
        (void)setenv("TERM", term, 0);
        (void)setenv("USER", pwd->pw_name, 1);
                strncpy(term, stypeof(tty), sizeof(term));
        (void)setenv("TERM", term, 0);
        (void)setenv("USER", pwd->pw_name, 1);

-       (void)setenv("PATH", "/usr/ucb:/bin:/usr/bin:", 0);
+       (void)setenv("PATH", _PATH_DEFPATH, 0);

 
        if (tty[sizeof("tty")-1] == 'd')
                syslog(LOG_INFO, "DIALUP %s, %s", tty, pwd->pw_name);
        if (pwd->pw_uid == 0)
                if (hostname)
 
        if (tty[sizeof("tty")-1] == 'd')
                syslog(LOG_INFO, "DIALUP %s, %s", tty, pwd->pw_name);
        if (pwd->pw_uid == 0)
                if (hostname)

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

                else
                else

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

 
        if (!quietlog) {
                struct stat st;
 
                motd();
 
        if (!quietlog) {
                struct stat st;
 
                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 " : "");
        }
 


@@ -382,9 +464,15 @@ 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 (setlogname(pwd->pw_name, strlen(pwd->pw_name)) < 0)
+               syslog(LOG_ERR, "setlogname() failure: %m");
+
+       /* discard permissions last so can't get killed and drop core */
+       (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);
+       (void)fprintf(stderr, "login: no shell: %s.\n", strerror(errno));

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


@@ -395,16 +483,18 @@ getloginname()
        static char nbuf[UT_NAMESIZE + 1];
 
        for (;;) {
        static char nbuf[UT_NAMESIZE + 1];
 
        for (;;) {

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

                for (p = nbuf; (ch = getchar()) != '\n'; ) {
                for (p = nbuf; (ch = getchar()) != '\n'; ) {

-                       if (ch == EOF)
+                       if (ch == EOF) {
+                               badlogin(username);

                                exit(0);
                                exit(0);

+                       }

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


@@ -416,16 +506,16 @@ getloginname()
 
 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);

 }
 
 jmp_buf motdinterrupt;
 }
 
 jmp_buf motdinterrupt;


@@ -436,7 +526,7 @@ motd()
        int (*oldint)(), sigint();
        char tbuf[8192];
 
        int (*oldint)(), sigint();
        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)


@@ -456,44 +546,60 @@ checknologin()
        register int fd, nchars;
        char tbuf[8192];
 
        register int fd, nchars;
        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();
+       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",
+                                       (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);
                        }
                        (void)lseek(fd, (off_t)pwd->pw_uid * sizeof(ll), L_SET);
                }
                                            sizeof(ll.ll_line), ll.ll_line);
                        }
                        (void)lseek(fd, (off_t)pwd->pw_uid * sizeof(ll), L_SET);
                }

+               bzero((char *)&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, %s",
+                   failures, failures > 1 ? "S" : "", hostname, name);
+       else
+               syslog(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"
 


@@ -506,22 +612,6 @@ 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;
-       pwd = getpwnam(username);
-       if (pwd == NULL)
-               return(-1);
-       return(ruserok(host, (pwd->pw_uid == 0), rusername, username));
-}
-

 getstr(buf, cnt, err)
        char *buf, *err;
        int cnt;
 getstr(buf, cnt, err)
        char *buf, *err;
        int cnt;


@@ -532,13 +622,36 @@ getstr(buf, cnt, err)
                if (read(0, &ch, sizeof(ch)) != sizeof(ch))
                        exit(1);
                if (--cnt < 0) {
                if (read(0, &ch, sizeof(ch)) != sizeof(ch))
                        exit(1);
                if (--cnt < 0) {

-                       fprintf(stderr, "%s too long\r\n", err);
+                       (void)fprintf(stderr, "%s too long\r\n", err);

                        sleepexit(1);
                }
                *buf++ = ch;
        } while (ch);
 }
 
                        sleepexit(1);
                }
                *buf++ = ch;
        } while (ch);
 }
 

+sleepexit(eval)
+       int eval;
+{
+       sleep((u_int)5);
+       exit(eval);
+}
+
+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;
+       pwd = getpwnam(username);
+       if (pwd == NULL)
+               return(-1);
+       return(ruserok(host, (pwd->pw_uid == 0), rusername, username));
+}
+

 char *speeds[] = {
        "0", "50", "75", "110", "134", "150", "200", "300", "600",
        "1200", "1800", "2400", "4800", "9600", "19200", "38400",
 char *speeds[] = {
        "0", "50", "75", "110", "134", "150", "200", "300", "600",
        "1200", "1800", "2400", "4800", "9600", "19200", "38400",


@@ -565,10 +678,3 @@ doremoteterm(tp)
        }
        tp->sg_flags = ECHO|CRMOD|ANYP|XTABS;
 }
        }
        tp->sg_flags = ECHO|CRMOD|ANYP|XTABS;
 }

-
-sleepexit(eval)
-       int eval;
-{
-       sleep((u_int)5);
-       exit(eval);
-}