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 1195e73..926be83 100644 (file)
--- a/usr/src/usr.bin/login/login.c
+++ b/usr/src/usr.bin/login/login.c
@@ -1,264 +1,583 @@
-static char *sccsid = "@(#)login.c     4.5 (Berkeley) %G%";
+/*
+ * 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 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>

-#define SCPYN(a, b)    strncpy(a, b, sizeof(a))
+#include <errno.h>
+#include <ttyent.h>
+#include <syslog.h>
+#include <grp.h>

 
 

-#define NMAX sizeof(utmp.ut_name)
-#define LMAX sizeof(utmp.ut_line)
+#define TTYGRPNAME     "tty"           /* name of group to own ttys */
+#define TTYGID(gid)    tty_gid(gid)    /* gid that owns all ttys */

 
 

-char   user[20];
+#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 HMAX   sizeof(utmp.ut_host)
+
+#define        FALSE   0
+#define        TRUE    -1
+
+char   nolog[] =       "/etc/nologin";
+char   qlog[]  =       ".hushlogin";

 char   maildir[30] =   "/usr/spool/mail/";
 char   lastlog[] =     "/usr/adm/lastlog";
 char   maildir[30] =   "/usr/spool/mail/";
 char   lastlog[] =     "/usr/adm/lastlog";

-struct passwd nouser = {"", "nope"};
+struct passwd nouser = {"", "nope", -1, -1, -1, "", "", "", "" };

 struct sgttyb ttyb;
 struct utmp utmp;
 char   minusnam[16] = "-";
 struct sgttyb ttyb;
 struct utmp utmp;
 char   minusnam[16] = "-";

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

 
 

-struct passwd *getpwnam();
-char   *strcat();
-int    setpwent();
+char   term[64];
+
+struct passwd *pwd;
+char   *strcat(), *rindex(), *index();
+int    timedout();

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

-char   *rindex();

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

-extern char **environ;
-
-#define        CTRL(c) ('c'&037)
-#define        CERASE  '#'
-#define        CEOT    CTRL(d)
-#define        CKILL   '@'
-#define        CQUIT   034             /* FS, cntl shift L */
-#define        CINTR   0177            /* DEL */
-#define        CSTOP   CTRL(s)
-#define        CSTART  CTRL(q)
-#define        CBRK    0377
+extern int errno;
+

 struct tchars tc = {
        CINTR, CQUIT, CSTART, CSTOP, CEOT, CBRK
 };
 struct ltchars ltc = {
 struct tchars tc = {
        CINTR, CQUIT, CSTART, CSTOP, CEOT, CBRK
 };
 struct ltchars ltc = {

-       CTRL(z), CTRL(y), CTRL(r), CTRL(o), CTRL(w), CTRL(v)
+       CSUSP, CDSUSP, CRPRNT, CFLUSH, CWERASE, CLNEXT

 };
 
 };
 

+struct winsize win = { 0, 0, 0, 0 };
+
+int    rflag;
+int    usererr = -1;
+char   rusername[NMAX+1], lusername[NMAX+1];
+char   rpassword[NMAX+1];
+char   name[NMAX+1];
+char   me[MAXHOSTNAMELEN];
+char   *rhost;
+

 main(argc, argv)
 main(argc, argv)

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

 {
 {

+       extern  char **environ;

        register char *namep;
        register char *namep;

-       int t, f, c;
-       char *ttyn;
-       int ldisc = 0;
+       int pflag = 0, hflag = 0, fflag = 0, t, f, c;
+       int invalid, quietlog;
+       FILE *nlfd;
+       char *ttyn, *tty;
+       int ldisc = 0, zero = 0;
+       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);
-       ioctl(0, TIOCLSET, 0);
+       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;
+               }
+               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]);
+                       }
+                       argc -= 2;
+                       argv += 2;
+                       continue;
+               }
+               if (strcmp(argv[1], "-f") == 0 && argc > 2) {
+                       if (rflag) {
+                               printf("Only one of -r and -f allowed\n");
+                               exit(1);
+                       }
+                       fflag = 1;
+                       SCPYN(utmp.ut_name, argv[2]);
+                       argc -= 2;
+                       argv += 2;
+                       continue;
+               }
+               if (strcmp(argv[1], "-p") == 0) {
+                       argc--;
+                       argv++;
+                       pflag = 1;
+                       continue;
+               }
+               break;
+       }
+       ioctl(0, TIOCLSET, &zero);

        ioctl(0, TIOCNXCL, 0);
        ioctl(0, TIOCNXCL, 0);

-       gtty(0, &ttyb);
-       ttyb.sg_erase = '#';
-       ttyb.sg_kill = '@';
-       stty(0, &ttyb);
-       ioctl(0, TIOCSETC, &tc);
+       ioctl(0, FIONBIO, &zero);
+       ioctl(0, FIOASYNC, &zero);
+       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, TIOCSLTC, &ltc);

-       for (t=3; t<20; t++)
+       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==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);
+               if (fflag == 0)
+                       SCPYN(utmp.ut_name, "");
+               /*
+                * Name specified, take it.
+                */
+               if (argc > 1) {
+                       SCPYN(utmp.ut_name, argv[1]);
+                       argc = 0;
+               }
+               /*
+                * If remote login take given name,
+                * otherwise prompt user for something.
+                */
+               if (rflag && !invalid)
+                       SCPYN(utmp.ut_name, lusername);
+               else {
+                       getloginname(&utmp);
+                       if (utmp.ut_name[0] == '-') {
+                               puts("login names may not start with '-'.");
+                               invalid = TRUE;
+                               continue;
+                       }
+               }
+               invalid = FALSE;
+               if (!strcmp(pwd->pw_shell, "/bin/csh")) {
+                       ldisc = NTTYDISC;
+                       ioctl(0, TIOCSETD, &ldisc);
+               }
+               if (fflag) {
+                       int uid = getuid();

 
 

-    loop:
-       ldisc = 0;
-       ioctl(0, TIOCSETD, &ldisc);
-       SCPYN(utmp.ut_name, "");
-       if (argc>1) {
-               SCPYN(utmp.ut_name, argv[1]);
-               argc = 0;
-       }
-       while (utmp.ut_name[0] == '\0') {
-               namep = utmp.ut_name;
-               printf("login: ");
-               while ((c = getchar()) != '\n') {
-                       if(c == ' ')
-                               c = '_';
-                       if (c == EOF)
-                               exit(0);
-                       if (namep < utmp.ut_name+NMAX)
-                               *namep++ = c;
+                       if (uid != 0 && uid != pwd->pw_uid)
+                               fflag = 0;
+                       /*
+                        * Disallow automatic login for root.
+                        */
+                       if (pwd->pw_uid == 0)
+                               fflag = 0;

                }
                }

-       }
-       setpwent();
-       if ((pwd = getpwnam(utmp.ut_name)) == NULL)
-               pwd = &nouser;
-       endpwent();
-       if (!strcmp(pwd->pw_shell, "/bin/csh")) {
-               ldisc = NTTYDISC;
-               ioctl(0, TIOCSETD, &ldisc);
-       }
-       if (*pwd->pw_passwd != '\0') {
-               nice(-4);
-               namep = crypt(getpass("Password:"),pwd->pw_passwd);
-               nice(4);
-               if (strcmp(namep, pwd->pw_passwd)) {
-bad:
+               /*
+                * 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) {
+                       while ((c = getc(nlfd)) != EOF)
+                               putchar(c);
+                       fflush(stdout);
+                       sleep(5);
+                       exit(0);
+               }
+               /*
+                * 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");
                        printf("Login incorrect\n");

-                       if (ttyn[LMAX] == 'd') {
-                               FILE *console = fopen("/dev/console", "w");
-                               if (console != NULL) {
-                                       fprintf(console, "\r\nBADDIALUP %s %s\r\n", ttyn+5, utmp.ut_name);
-                                       fclose(console);
-                               }
+                       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);

                        }
                        }

-                       goto loop;

                }
                }

-       }
-       sprintf(user, "USER=%.*s", NMAX, pwd->pw_name);
-       if (pwd->pw_uid == 0 && ttyn[5] != 'c')
-               goto bad;
-       if (ttyn[LMAX] == 'd') {
-               FILE *console = fopen("/dev/console", "w");
-               if (console != NULL) {
-                       fprintf(console, "\r\nDIALUP %s %s\r\n", ttyn+5, pwd->pw_name);
-                       fclose(console);
+               if (*pwd->pw_shell == '\0')
+                       pwd->pw_shell = "/bin/sh";
+               if (chdir(pwd->pw_dir) < 0 && !invalid ) {
+                       if (chdir("/") < 0) {
+                               printf("No directory!\n");
+                               invalid = TRUE;
+                       } else {
+                               printf("No directory! %s\n",
+                                  "Logging in with home=/");
+                               pwd->pw_dir = "/";
+                       }

                }
                }

-       }
-       if((f = open(lastlog, 2)) >= 0) {
-               struct lastlog ll;
+               /*
+                * Remote login invalid must have been because
+                * of a restriction of some sort, no extra chances.
+                */
+               if (!usererr && invalid)
+                       exit(1);
+       } while (invalid);
+/* committed to login turn off timeout */
+       alarm(0);

 
 

-               lseek(f, (long) pwd->pw_uid * sizeof (struct lastlog), 0);
-               if (read(f, (char *) &ll, sizeof ll) == sizeof ll && ll.ll_time != 0) {
-                       register char *ep = (char *) ctime(&ll.ll_time);
-                       printf("Last login: ");
-                       ep[24 - 5] = 0;
-                       printf("%s on %.*s\n", ep, LMAX, ll.ll_line);
-               }
-               lseek(f, (long) pwd->pw_uid * sizeof (struct lastlog), 0);
-               time(&ll.ll_time);
-               strcpyn(ll.ll_line, ttyn+5, LMAX);
-               write(f, (char *) &ll, sizeof ll);
-               close(f);
-       }
-       if(chdir(pwd->pw_dir) < 0) {
-               printf("No directory\n");
-               goto loop;
+       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);
        }

-       chown(ttyn, pwd->pw_uid, pwd->pw_gid);
+       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 &&
+                   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);
+               SCPYN(ll.ll_line, tty);
+               SCPYN(ll.ll_host, utmp.ut_host);
+               write(f, (char *) &ll, sizeof ll);
+               close(f);
+       }
+       chown(ttyn, pwd->pw_uid, TTYGID(pwd->pw_gid));
+       if (!hflag && !rflag)                                   /* XXX */
+               ioctl(0, TIOCSWINSZ, &win);
+       chmod(ttyn, 0620);

        setgid(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);

-       if (*pwd->pw_shell == '\0')
-               pwd->pw_shell = "/bin/sh";
-       environ = envinit;
-       strncat(homedir, pwd->pw_dir, sizeof(homedir)-6);
-       strncat(shell, pwd->pw_shell, sizeof(shell)-7);
-       strncat(term, stypeof(ttyn), sizeof(term)-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);
-       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 (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) {
+               struct stat st;
+
+               showmotd();
+               strcat(maildir, pwd->pw_name);
+               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(SIGQUIT, SIG_DFL);
        signal(SIGINT, SIG_DFL);

+       signal(SIGTSTP, SIG_IGN);

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

+       perror(pwd->pw_shell);

        printf("No shell\n");
        exit(0);
 }
 
        printf("No shell\n");
        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()
 {

+

        signal(SIGINT, SIG_IGN);
        stopmotd++;
 }
 
        signal(SIGINT, SIG_IGN);
        stopmotd++;
 }
 

+rootterm(tty)
+       char *tty;
+{
+       register struct ttyent *t;
+
+       if ((t = getttynam(tty)) != NULL) {
+               if (t->ty_status & TTY_SECURE)
+                       return (1);
+       }
+       return (0);
+}
+

 showmotd()
 {
        FILE *mf;
        register c;
 
        signal(SIGINT, catch);
 showmotd()
 {
        FILE *mf;
        register c;
 
        signal(SIGINT, catch);

-       if((mf = fopen("/etc/motd","r")) != NULL) {
-               while((c = getc(mf)) != EOF && stopmotd == 0)
+       if ((mf = fopen("/etc/motd", "r")) != NULL) {
+               while ((c = getc(mf)) != EOF && stopmotd == 0)

                        putchar(c);
                fclose(mf);
        }
        signal(SIGINT, SIG_IGN);
 }
 
                        putchar(c);
                fclose(mf);
        }
        signal(SIGINT, SIG_IGN);
 }
 

+#undef UNKNOWN

 #define UNKNOWN "su"
 
 char *
 stypeof(ttyid)
 #define UNKNOWN "su"
 
 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)
+       if (ttyid == NULL || (t = getttynam(ttyid)) == NULL)

                return (UNKNOWN);
                return (UNKNOWN);

-       f = fopen("/etc/ttytype", "r");
-       if (f == NULL)
-               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++ = 0;
-               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);
+       }
+       return(ruserok(host, (pwd->pw_uid == 0), rusername, lusername));
+}
+
+getstr(buf, cnt, err)
+       char *buf;
+       int cnt;
+       char *err;
+{
+       char c;
+
+       do {
+               if (read(0, &c, 1) != 1)
+                       exit(1);
+               if (--cnt < 0) {
+                       printf("%s too long\r\n", err);
+                       exit(1);

                }
                }

+               *buf++ = c;
+       } while (c != 0);
+}
+
+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;
+                       }

        }
        }

-       fclose (f);
-       return (UNKNOWN);
+       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);

 }
 }