i unused

[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 b7979ee..926be83 100644 (file)
--- a/usr/src/usr.bin/login/login.c
+++ b/usr/src/usr.bin/login/login.c
@@ -1,341 +1,421 @@
-static char *sccsid = "@(#)login.c     4.21 83/03/31";
+/*
+ * 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.
+ */
+
+#ifndef lint
+char copyright[] =
+"@(#) Copyright (c) 1980 Regents of the University of California.\n\
+ All rights reserved.\n";
+#endif not lint
+
+#ifndef lint
+static char sccsid[] = "@(#)login.c    5.21 (Berkeley) %G%";
+#endif not lint
+

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

- * login -r
+ * login -r hostname   (for rlogind)
+ * login -h hostname   (for telnetd, etc.)
+ * login -f name       (for pre-authenticated login: datakit, xterm, etc.)

  */
 
  */
 

-#include <sys/types.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 <sgtty.h>
 #include <utmp.h>
 #include <signal.h>
 #include <pwd.h>
 #include <stdio.h>
 #include <sgtty.h>
 #include <utmp.h>
 #include <signal.h>
 #include <pwd.h>
 #include <stdio.h>

-#include <sys/stat.h>

 #include <lastlog.h>
 #include <lastlog.h>

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

 
 

+#define TTYGRPNAME     "tty"           /* name of group to own ttys */
+#define TTYGID(gid)    tty_gid(gid)    /* gid that owns all ttys */
+
+#define        SCMPN(a, b)     strncmp(a, b, sizeof(a))

 #define        SCPYN(a, b)     strncpy(a, b, sizeof(a))
 
 #define NMAX   sizeof(utmp.ut_name)
 #define        SCPYN(a, b)     strncpy(a, b, sizeof(a))
 
 #define NMAX   sizeof(utmp.ut_name)

-#define LMAX   sizeof(utmp.ut_line)
+#define HMAX   sizeof(utmp.ut_host)

 
 #define        FALSE   0
 #define        TRUE    -1
 
 char   nolog[] =       "/etc/nologin";
 char   qlog[]  =       ".hushlogin";
 
 #define        FALSE   0
 #define        TRUE    -1
 
 char   nolog[] =       "/etc/nologin";
 char   qlog[]  =       ".hushlogin";

-char   securetty[] =   "/etc/securetty";

 char   maildir[30] =   "/usr/spool/mail/";
 char   lastlog[] =     "/usr/adm/lastlog";
 struct passwd nouser = {"", "nope", -1, -1, -1, "", "", "", "" };
 struct sgttyb ttyb;
 struct utmp utmp;
 char   minusnam[16] = "-";
 char   maildir[30] =   "/usr/spool/mail/";
 char   lastlog[] =     "/usr/adm/lastlog";
 struct passwd nouser = {"", "nope", -1, -1, -1, "", "", "", "" };
 struct sgttyb ttyb;
 struct utmp utmp;
 char   minusnam[16] = "-";

+char   *envinit[1];                    /* now set by setenv calls */
+/*
+ * This bounds the time given to login.  We initialize it here
+ * so it can be patched on machines where it's too small.
+ */
+int    timeout = 300;

 
 

-char   homedir[64] = "HOME=";
-char   shell[64] = "SHELL=";
-char   term[64] = "TERM=";
-char   user[20] = "USER=";
-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]))
-
-char   *envinit[] =
-    {homedir, shell, "PATH=:/usr/ucb:/bin:/usr/bin", term, user, 0};
+char   term[64];

 
 struct passwd *pwd;
 
 struct passwd *pwd;

-struct passwd *getpwnam();

 char   *strcat(), *rindex(), *index();
 char   *strcat(), *rindex(), *index();

-int    setpwent();
+int    timedout();

 char   *ttyname();
 char   *crypt();
 char   *getpass();
 char   *ttyname();
 char   *crypt();
 char   *getpass();

-char   *rindex();

 char   *stypeof();
 char   *stypeof();

-extern char **environ;
+extern int errno;

 
 

-struct ttychars tc = {
-       CERASE, CKILL,  CINTR,  CQUIT,  CSTART,
-       CSTOP,  CEOF,   CBRK,   CSUSP,  CDSUSP,
-       CRPRNT, CFLUSH, CWERASE,CLNEXT
+struct tchars tc = {
+       CINTR, CQUIT, CSTART, CSTOP, CEOT, CBRK
+};
+struct ltchars ltc = {
+       CSUSP, CDSUSP, CRPRNT, CFLUSH, CWERASE, CLNEXT

 };
 
 };
 

+struct winsize win = { 0, 0, 0, 0 };
+

 int    rflag;
 int    rflag;

+int    usererr = -1;

 char   rusername[NMAX+1], lusername[NMAX+1];
 char   rpassword[NMAX+1];
 char   name[NMAX+1];
 char   rusername[NMAX+1], lusername[NMAX+1];
 char   rpassword[NMAX+1];
 char   name[NMAX+1];

+char   me[MAXHOSTNAMELEN];

 char   *rhost;
 
 main(argc, argv)
 char   *rhost;
 
 main(argc, argv)

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

 {
 {

+       extern  char **environ;

        register char *namep;
        register char *namep;

-       int t, f, c;
-       int invalid;
-       int quietlog;
-       int i;
+       int pflag = 0, hflag = 0, fflag = 0, t, f, c;
+       int invalid, quietlog;

        FILE *nlfd;
        FILE *nlfd;

-       char *ttyn;
+       char *ttyn, *tty;

        int ldisc = 0, zero = 0;
        int ldisc = 0, zero = 0;

-       FILE *hostf; int first = 1;
+       char *p, *domain, *index();

 
 

-       alarm(60);
+       signal(SIGALRM, timedout);
+       alarm(timeout);

        signal(SIGQUIT, SIG_IGN);
        signal(SIGINT, SIG_IGN);
        signal(SIGQUIT, SIG_IGN);
        signal(SIGINT, SIG_IGN);

-       nice(-100);
-       nice(20);
-       nice(0);
-       if (argc > 1 && !strcmp(argv[1], "-r")) {
-               rflag++;
-               rhost = argv[2];
-               argc = 1;
-               getstr(rusername, sizeof (rusername), "remuser");
-               getstr(lusername, sizeof (lusername), "locuser");
-               getstr(term+5, sizeof(term)-5, "Terminal type");
-               if (getuid())
-                       goto abnormal;
-               setpwent();
-               pwd = getpwnam(lusername);
-               endpwent();
-               if (pwd == NULL) {
-                       if (strcmp(rusername, lusername))
-                               printf("%s: No such user\r\n", lusername);
-                       goto abnormal;
+       setpriority(PRIO_PROCESS, 0, 0);
+       quota(Q_SETUID, 0, 0, 0);
+       /*
+        * -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
+        */
+       (void) gethostname(me, sizeof(me));
+       domain = index(me, '.');
+       while (argc > 1) {
+               if (strcmp(argv[1], "-r") == 0) {
+                       if (rflag || hflag || fflag) {
+                               printf("Other options not allowed with -r\n");
+                               exit(1);
+                       }
+                       if (argv[2] == 0)
+                               exit(1);
+                       rflag = 1;
+                       usererr = doremotelogin(argv[2]);
+                       if ((p = index(argv[2], '.')) && strcmp(p, domain) == 0)
+                               *p = 0;
+                       SCPYN(utmp.ut_host, argv[2]);
+                       argc -= 2;
+                       argv += 2;
+                       continue;

                }
                }

-               hostf = pwd->pw_uid ? fopen("/etc/hosts.equiv", "r") : 0;
-       again:
-               if (hostf) {
-                       char ahost[32];
-
-                       while (fgets(ahost, sizeof (ahost), hostf)) {
-                               char *user;
-
-                               if (index(ahost, '\n'))
-                                       *index(ahost, '\n') = 0;
-                               user = index(ahost, ' ');
-                               if (user)
-                                       *user++ = 0;
-                               if (!strcmp(rhost, ahost) &&
-                                   !strcmp(rusername, user ?
-                                   user : lusername)) {
-                                       fclose(hostf);
-                                       goto normal;
+               if (strcmp(argv[1], "-h") == 0) {
+                       if (getuid() == 0) {
+                               if (rflag || hflag) {
+                                   printf("Only one of -r and -h allowed\n");
+                                   exit(1);

                                }
                                }

+                               hflag = 1;
+                               if ((p = index(argv[2], '.')) &&
+                                   strcmp(p, domain) == 0)
+                                       *p = 0;
+                               SCPYN(utmp.ut_host, argv[2]);

                        }
                        }

-                       fclose(hostf);
+                       argc -= 2;
+                       argv += 2;
+                       continue;

                }
                }

-               if (first == 1) {
-                       char *rhosts = ".rhosts";
-                       struct stat sbuf;
-
-                       first = 0;
-                       if (chdir(pwd->pw_dir) < 0)
-                               goto again;
-                       if (lstat(rhosts, &sbuf) < 0)
-                               goto again;
-                       if ((sbuf.st_mode & S_IFMT) == S_IFLNK) {
-                               printf("login: .rhosts is a soft link.\r\n");
-                               fclose(hostf);
-                               goto abnormal;
-                       }
-                       hostf = fopen(rhosts, "r");
-                       fstat(fileno(hostf), &sbuf);
-                       if ((int) sbuf.st_uid != pwd->pw_uid &&
-                           (int) sbuf.st_uid != 0) {
-                               printf("login: Bad .rhosts ownership.\r\n");
-                               fclose(hostf);
-                               goto abnormal;
+               if (strcmp(argv[1], "-f") == 0 && argc > 2) {
+                       if (rflag) {
+                               printf("Only one of -r and -f allowed\n");
+                               exit(1);

                        }
                        }

-               goto again;
+                       fflag = 1;
+                       SCPYN(utmp.ut_name, argv[2]);
+                       argc -= 2;
+                       argv += 2;
+                       continue;

                }
                }

-abnormal:
-               rhost = 0;
-               rflag = -1;
+               if (strcmp(argv[1], "-p") == 0) {
+                       argc--;
+                       argv++;
+                       pflag = 1;
+                       continue;
+               }
+               break;

        }
        }

-normal:
-       ioctl(0, TIOCLSET, &zero);      /* XXX */
+       ioctl(0, TIOCLSET, &zero);

        ioctl(0, TIOCNXCL, 0);
        ioctl(0, FIONBIO, &zero);
        ioctl(0, FIOASYNC, &zero);
        ioctl(0, TIOCNXCL, 0);
        ioctl(0, FIONBIO, &zero);
        ioctl(0, FIOASYNC, &zero);

-       ioctl(0, TIOCGETP, &ttyb);      /* XXX */
-       if (rflag) {
-               char *cp = index(term, '/');
-               if (cp) {
-                       int i;
-                       *cp++ = 0;
-                       for (i = 0; i < NSPEEDS; i++)
-                               if (!strcmp(speeds[i], cp)) {
-                                       ttyb.sg_ispeed = ttyb.sg_ospeed = i;
-                                       break;
-                               }
-               }
-               ttyb.sg_flags = ECHO|CRMOD|ANYP|XTABS;
-       }
-       ioctl(0, TIOCSETP, &ttyb);      /* XXX */
-       ioctl(0, TIOCCSET, &tc);
-       for (t=3; t<20; t++)
+       ioctl(0, TIOCGETP, &ttyb);
+       /*
+        * If talking to an rlogin process,
+        * propagate the terminal type and
+        * baud rate across the network.
+        */
+       if (rflag)
+               doremoteterm(term, &ttyb);
+       ttyb.sg_erase = CERASE;
+       ttyb.sg_kill = CKILL;
+       ioctl(0, TIOCSLTC, &ltc);
+       ioctl(0, TIOCSETC, &tc);
+       ioctl(0, TIOCSETP, &ttyb);
+       for (t = getdtablesize(); t > 2; t--)

                close(t);
        ttyn = ttyname(0);
                close(t);
        ttyn = ttyname(0);

-       if (ttyn==(char *)0)
+       if (ttyn == (char *)0 || *ttyn == '\0')

                ttyn = "/dev/tty??";
                ttyn = "/dev/tty??";

+       tty = rindex(ttyn, '/');
+       if (tty == NULL)
+               tty = ttyn;
+       else
+               tty++;
+       openlog("login", LOG_ODELAY, LOG_AUTH);
+       t = 0;
+       invalid = FALSE;

        do {
                ldisc = 0;
                ioctl(0, TIOCSETD, &ldisc);
        do {
                ldisc = 0;
                ioctl(0, TIOCSETD, &ldisc);

-               invalid = FALSE;
-               SCPYN(utmp.ut_name, "");
-               if (argc>1) {
+               if (fflag == 0)
+                       SCPYN(utmp.ut_name, "");
+               /*
+                * Name specified, take it.
+                */
+               if (argc > 1) {

                        SCPYN(utmp.ut_name, argv[1]);
                        argc = 0;
                }
                        SCPYN(utmp.ut_name, argv[1]);
                        argc = 0;
                }

-               if (rflag) {
+               /*
+                * If remote login take given name,
+                * otherwise prompt user for something.
+                */
+               if (rflag && !invalid)

                        SCPYN(utmp.ut_name, lusername);
                        SCPYN(utmp.ut_name, lusername);

-                       if (rflag == -1)
-                               rflag = 0;
-               } else
-                       while (utmp.ut_name[0] == '\0') {
-                               namep = utmp.ut_name;
-                               { char hostname[32];
-                                 gethostname(hostname, sizeof (hostname));
-                                 printf("%s login: ", hostname); }
-                               while ((c = getchar()) != '\n') {
-                                       if (c == ' ')
-                                               c = '_';
-                                       if (c == EOF)
-                                               exit(0);
-                                       if (namep < utmp.ut_name+NMAX)
-                                               *namep++ = c;
-                               }
+               else {
+                       getloginname(&utmp);
+                       if (utmp.ut_name[0] == '-') {
+                               puts("login names may not start with '-'.");
+                               invalid = TRUE;
+                               continue;

                        }
                        }

-               if (rhost == 0) {
-                       setpwent();
-                       if ((pwd = getpwnam(utmp.ut_name)) == NULL)
-                               pwd = &nouser;
-                       endpwent();

                }
                }

+               invalid = FALSE;

                if (!strcmp(pwd->pw_shell, "/bin/csh")) {
                        ldisc = NTTYDISC;
                        ioctl(0, TIOCSETD, &ldisc);
                }
                if (!strcmp(pwd->pw_shell, "/bin/csh")) {
                        ldisc = NTTYDISC;
                        ioctl(0, TIOCSETD, &ldisc);
                }

-               if (rhost == 0) {
-                       if (*pwd->pw_passwd != '\0') {
-                               char *pp;
-                               nice(-4);
-                               if (rflag == 0)
-                                       pp = getpass("Password:");
-                               else
-                                       pp = rpassword;
-                               namep = crypt(pp,pwd->pw_passwd);
-                               nice(4);
-                               if (strcmp(namep, pwd->pw_passwd))
-                                       invalid = TRUE;
-                       }
+               if (fflag) {
+                       int uid = getuid();
+
+                       if (uid != 0 && uid != pwd->pw_uid)
+                               fflag = 0;
+                       /*
+                        * Disallow automatic login for root.
+                        */
+                       if (pwd->pw_uid == 0)
+                               fflag = 0;

                }
                }

+               /*
+                * If no remote login authentication and
+                * a password exists for this user, prompt
+                * for one and verify it.
+                */
+               if (usererr == -1 && fflag == 0 && *pwd->pw_passwd != '\0') {
+                       char *pp;
+
+                       setpriority(PRIO_PROCESS, 0, -4);
+                       pp = getpass("Password:");
+                       namep = crypt(pp, pwd->pw_passwd);
+                       setpriority(PRIO_PROCESS, 0, 0);
+                       if (strcmp(namep, pwd->pw_passwd))
+                               invalid = TRUE;
+               }
+               /*
+                * If user not super-user, check for logins disabled.
+                */

                if (pwd->pw_uid != 0 && (nlfd = fopen(nolog, "r")) > 0) {
                if (pwd->pw_uid != 0 && (nlfd = fopen(nolog, "r")) > 0) {

-                       /* logins are disabled except for root */

                        while ((c = getc(nlfd)) != EOF)
                                putchar(c);
                        fflush(stdout);
                        sleep(5);
                        exit(0);
                }
                        while ((c = getc(nlfd)) != EOF)
                                putchar(c);
                        fflush(stdout);
                        sleep(5);
                        exit(0);
                }

-               if (!invalid && pwd->pw_uid == 0 &&
-                   !rootterm(ttyn+sizeof("/dev/")-1)) {
-                       logerr("ROOT LOGIN REFUSED %s",
-                           ttyn+sizeof("/dev/")-1);
+               /*
+                * If valid so far and root is logging in,
+                * see if root logins on this terminal are permitted.
+                */
+               if (!invalid && pwd->pw_uid == 0 && !rootterm(tty)) {
+                       if (utmp.ut_host[0])
+                               syslog(LOG_CRIT,
+                                   "ROOT LOGIN REFUSED ON %s FROM %.*s",
+                                   tty, HMAX, utmp.ut_host);
+                       else
+                               syslog(LOG_CRIT,
+                                   "ROOT LOGIN REFUSED ON %s", tty);

                        invalid = TRUE;
                }
                if (invalid) {
                        printf("Login incorrect\n");
                        invalid = TRUE;
                }
                if (invalid) {
                        printf("Login incorrect\n");

-                       if (ttyn[sizeof("/dev/tty")-1] == 'd')
-                               logerr("BADDIALUP %s %s\n",
-                                   ttyn+sizeof("/dev/")-1, utmp.ut_name);
+                       if (++t >= 5) {
+                               if (utmp.ut_host[0])
+                                       syslog(LOG_ERR,
+                           "REPEATED LOGIN FAILURES ON %s FROM %.*s, %.*s",
+                                           tty, HMAX, utmp.ut_host,
+                                           NMAX, utmp.ut_name);
+                               else
+                                       syslog(LOG_ERR,
+                                   "REPEATED LOGIN FAILURES ON %s, %.*s",
+                                               tty, NMAX, utmp.ut_name);
+                               ioctl(0, TIOCHPCL, (struct sgttyb *) 0);
+                               close(0), close(1), close(2);
+                               sleep(10);
+                               exit(1);
+                       }

                }
                if (*pwd->pw_shell == '\0')
                        pwd->pw_shell = "/bin/sh";
                }
                if (*pwd->pw_shell == '\0')
                        pwd->pw_shell = "/bin/sh";

-               i = strlen(pwd->pw_shell);

                if (chdir(pwd->pw_dir) < 0 && !invalid ) {
                        if (chdir("/") < 0) {
                                printf("No directory!\n");
                                invalid = TRUE;
                        } else {
                if (chdir(pwd->pw_dir) < 0 && !invalid ) {
                        if (chdir("/") < 0) {
                                printf("No directory!\n");
                                invalid = TRUE;
                        } else {

-                               printf("No directory!  Logging in with home=/\n");
+                               printf("No directory! %s\n",
+                                  "Logging in with home=/");

                                pwd->pw_dir = "/";
                        }
                }
                                pwd->pw_dir = "/";
                        }
                }

-               if (rflag && invalid)
+               /*
+                * Remote login invalid must have been because
+                * of a restriction of some sort, no extra chances.
+                */
+               if (!usererr && invalid)

                        exit(1);
        } while (invalid);
                        exit(1);
        } while (invalid);

+/* committed to login turn off timeout */
+       alarm(0);

 
 

-
+       if (quota(Q_SETUID, pwd->pw_uid, 0, 0) < 0 && errno != EINVAL) {
+               if (errno == EUSERS)
+                       printf("%s.\n%s.\n",
+                          "Too many users logged on already",
+                          "Try again later");
+               else if (errno == EPROCLIM)
+                       printf("You have too many processes running.\n");
+               else
+                       perror("quota (Q_SETUID)");
+               sleep(5);
+               exit(0);
+       }

        time(&utmp.ut_time);
        t = ttyslot();
        time(&utmp.ut_time);
        t = ttyslot();

-       if (t>0 && (f = open("/etc/utmp", 1)) >= 0) {
+       if (t > 0 && (f = open("/etc/utmp", O_WRONLY)) >= 0) {

                lseek(f, (long)(t*sizeof(utmp)), 0);
                lseek(f, (long)(t*sizeof(utmp)), 0);

-               SCPYN(utmp.ut_line, rindex(ttyn, '/')+1);
+               SCPYN(utmp.ut_line, tty);

                write(f, (char *)&utmp, sizeof(utmp));
                close(f);
        }
                write(f, (char *)&utmp, sizeof(utmp));
                close(f);
        }

-       if (t>0 && (f = open("/usr/adm/wtmp", 1)) >= 0) {
-               lseek(f, 0L, 2);
+       if ((f = open("/usr/adm/wtmp", O_WRONLY|O_APPEND)) >= 0) {

                write(f, (char *)&utmp, sizeof(utmp));
                close(f);
        }
                write(f, (char *)&utmp, sizeof(utmp));
                close(f);
        }

-       quietlog = 0;
-       if (access(qlog, 0) == 0)
-               quietlog = 1;
-       if ((f = open(lastlog, 2)) >= 0) {
+       quietlog = access(qlog, F_OK) == 0;
+       if ((f = open(lastlog, O_RDWR)) >= 0) {

                struct lastlog ll;
 
                lseek(f, (long)pwd->pw_uid * sizeof (struct lastlog), 0);
                if (read(f, (char *) &ll, sizeof ll) == sizeof ll &&
                struct lastlog ll;
 
                lseek(f, (long)pwd->pw_uid * sizeof (struct lastlog), 0);
                if (read(f, (char *) &ll, sizeof ll) == sizeof ll &&

-                   ll.ll_time != 0) {
-                       if (quietlog == 0)
-                       printf("Last login: %.*s on %.*s\n"
-                           , 24-5
-                           , (char *) ctime(&ll.ll_time)
-                           , sizeof(ll.ll_line)
-                           , ll.ll_line
-                       );
+                   ll.ll_time != 0 && !quietlog) {
+                       printf("Last login: %.*s ",
+                           24-5, (char *)ctime(&ll.ll_time));
+                       if (*ll.ll_host != '\0')
+                               printf("from %.*s\n",
+                                   sizeof (ll.ll_host), ll.ll_host);
+                       else
+                               printf("on %.*s\n",
+                                   sizeof (ll.ll_line), ll.ll_line);

                }
                lseek(f, (long)pwd->pw_uid * sizeof (struct lastlog), 0);
                time(&ll.ll_time);
                }
                lseek(f, (long)pwd->pw_uid * sizeof (struct lastlog), 0);
                time(&ll.ll_time);

-               SCPYN(ll.ll_line, rindex(ttyn, '/')+1);
+               SCPYN(ll.ll_line, tty);
+               SCPYN(ll.ll_host, utmp.ut_host);

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

-       chown(ttyn, pwd->pw_uid, pwd->pw_gid);
-       chmod(ttyn, 0622);
+       chown(ttyn, pwd->pw_uid, TTYGID(pwd->pw_gid));
+       if (!hflag && !rflag)                                   /* XXX */
+               ioctl(0, TIOCSWINSZ, &win);
+       chmod(ttyn, 0620);

        setgid(pwd->pw_gid);
        strncpy(name, utmp.ut_name, NMAX);
        name[NMAX] = '\0';
        initgroups(name, pwd->pw_gid);
        setgid(pwd->pw_gid);
        strncpy(name, utmp.ut_name, NMAX);
        name[NMAX] = '\0';
        initgroups(name, pwd->pw_gid);

+       quota(Q_DOWARN, pwd->pw_uid, (dev_t)-1, 0);

        setuid(pwd->pw_uid);
        setuid(pwd->pw_uid);

-       environ = envinit;
-       strncat(homedir, pwd->pw_dir, sizeof(homedir)-6);
-       strncat(shell, pwd->pw_shell, sizeof(shell)-7);
-       if (term[strlen("TERM=")] == 0)
-               strncat(term, stypeof(ttyn), sizeof(term)-6);
-       strncat(user, pwd->pw_name, sizeof(user)-6);
+
+       /* destroy environment unless user has asked to preserve it */
+       if (!pflag)
+               environ = envinit;
+       setenv("HOME", pwd->pw_dir, 1);
+       setenv("SHELL", pwd->pw_shell, 1);
+       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);
+

        if ((namep = rindex(pwd->pw_shell, '/')) == NULL)
                namep = pwd->pw_shell;
        else
                namep++;
        strcat(minusnam, namep);
        if ((namep = rindex(pwd->pw_shell, '/')) == NULL)
                namep = pwd->pw_shell;
        else
                namep++;
        strcat(minusnam, namep);

-       alarm(0);
-       umask(022);
-       if (ttyn[sizeof("/dev/tty")-1] == 'd')
-               logerr("DIALUP %s %s\n", ttyn+sizeof("/dev/")-1, 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 (utmp.ut_host[0])
+                       syslog(LOG_NOTICE, "ROOT LOGIN %s FROM %.*s",
+                           tty, HMAX, utmp.ut_host);
+               else
+                       syslog(LOG_NOTICE, "ROOT LOGIN %s", tty);

        if (!quietlog) {
        if (!quietlog) {

+               struct stat st;
+

                showmotd();
                strcat(maildir, pwd->pw_name);
                showmotd();
                strcat(maildir, pwd->pw_name);

-               if (access(maildir,4)==0) {
-                       struct stat statb;
-                       stat(maildir, &statb);
-                       if (statb.st_size)
-                               printf("You have mail.\n");
-               }
+               if (stat(maildir, &st) == 0 && st.st_size != 0)
+                       printf("You have %smail.\n",
+                               (st.st_mtime > st.st_atime) ? "new " : "");

        }
        }

-       
+       signal(SIGALRM, SIG_DFL);

        signal(SIGQUIT, SIG_DFL);
        signal(SIGINT, SIG_DFL);
        signal(SIGTSTP, SIG_IGN);
        signal(SIGQUIT, SIG_DFL);
        signal(SIGINT, SIG_DFL);
        signal(SIGTSTP, SIG_IGN);


@@ -345,6 +425,37 @@ normal:
        exit(0);
 }
 
        exit(0);
 }
 

+getloginname(up)
+       register struct utmp *up;
+{
+       register char *namep;
+       char c;
+
+       while (up->ut_name[0] == '\0') {
+               namep = up->ut_name;
+               printf("login: ");
+               while ((c = getchar()) != '\n') {
+                       if (c == ' ')
+                               c = '_';
+                       if (c == EOF)
+                               exit(0);
+                       if (namep < up->ut_name+NMAX)
+                               *namep++ = c;
+               }
+       }
+       strncpy(lusername, up->ut_name, NMAX);
+       lusername[NMAX] = 0;
+       if ((pwd = getpwnam(lusername)) == NULL)
+               pwd = &nouser;
+}
+
+timedout()
+{
+
+       printf("Login timed out after %d seconds\n", timeout);
+       exit(0);
+}
+

 int    stopmotd;
 catch()
 {
 int    stopmotd;
 catch()
 {


@@ -356,22 +467,13 @@ catch()
 rootterm(tty)
        char *tty;
 {
 rootterm(tty)
        char *tty;
 {

-       register FILE *fd;
-       char buf[100];
+       register struct ttyent *t;

 
 

-       if (rflag)
-               return(1);
-       if ((fd = fopen(securetty, "r")) == NULL)
-               return(1);
-       while (fgets(buf, sizeof buf, fd) != NULL) {
-               buf[strlen(buf)-1] = '\0';
-               if (strcmp(tty, buf) == 0) {
-                       fclose(fd);
-                       return(1);
-               }
+       if ((t = getttynam(tty)) != NULL) {
+               if (t->ty_status & TTY_SECURE)
+                       return (1);

        }
        }

-       fclose(fd);
-       return(0);
+       return (0);

 }
 
 showmotd()
 }
 
 showmotd()


@@ -380,7 +482,7 @@ showmotd()
        register c;
 
        signal(SIGINT, catch);
        register c;
 
        signal(SIGINT, catch);

-       if ((mf = fopen("/etc/motd","r")) != NULL) {
+       if ((mf = fopen("/etc/motd", "r")) != NULL) {

                while ((c = getc(mf)) != EOF && stopmotd == 0)
                        putchar(c);
                fclose(mf);
                while ((c = getc(mf)) != EOF && stopmotd == 0)
                        putchar(c);
                fclose(mf);


@@ -393,42 +495,31 @@ showmotd()
 
 char *
 stypeof(ttyid)
 
 char *
 stypeof(ttyid)

-char   *ttyid;
+       char *ttyid;

 {
 {

-       static char     typebuf[16];
-       char            buf[50];
-       register FILE   *f;
-       register char   *p, *t, *q;
+       register struct ttyent *t;

 
 

-       if (ttyid == NULL)
-               return (UNKNOWN);
-       f = fopen("/etc/ttytype", "r");
-       if (f == NULL)
+       if (ttyid == NULL || (t = getttynam(ttyid)) == NULL)

                return (UNKNOWN);
                return (UNKNOWN);

-       /* split off end of name */
-       for (p = q = ttyid; *p != 0; p++)
-               if (*p == '/')
-                       q = p + 1;
-
-       /* scan the file */
-       while (fgets(buf, sizeof buf, f) != NULL)
-       {
-               for (t=buf; *t!=' ' && *t != '\t'; t++)
-                       ;
-               *t++ = 0;
-               while (*t == ' ' || *t == '\t')
-                       t++;
-               for (p=t; *p>' '; p++)
-                       ;
-               *p = 0;
-               if (strcmp(q,t)==0) {
-                       strcpy(typebuf, buf);
-                       fclose(f);
-                       return (typebuf);
-               }
+       return (t->ty_type);
+}
+
+doremotelogin(host)
+       char *host;
+{
+       getstr(rusername, sizeof (rusername), "remuser");
+       getstr(lusername, sizeof (lusername), "locuser");
+       getstr(term, sizeof(term), "Terminal type");
+       if (getuid()) {
+               pwd = &nouser;
+               return(-1);
+       }
+       pwd = getpwnam(lusername);
+       if (pwd == NULL) {
+               pwd = &nouser;
+               return(-1);

        }
        }

-       fclose (f);
-       return (UNKNOWN);
+       return(ruserok(host, (pwd->pw_uid == 0), rusername, lusername));

 }
 
 getstr(buf, cnt, err)
 }
 
 getstr(buf, cnt, err)


@@ -449,8 +540,44 @@ getstr(buf, cnt, err)
        } while (c != 0);
 }
 
        } while (c != 0);
 }
 

-logerr(fmt, a1, a2, a3)
-       char *fmt, *a1, *a2, *a3;
+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(term, tp)
+       char *term;
+       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;
+}
+
+tty_gid(default_gid)
+       int default_gid;
+{
+       struct group *getgrnam(), *gr;
+       int gid = default_gid;
+
+       gr = getgrnam(TTYGRPNAME);
+       if (gr != (struct group *) 0)
+               gid = gr->gr_gid;
+
+       endgrent();

 
 

+       return (gid);

 }
 }