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386BSD 0.1 development
[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 670407a..e095538 100644 (file)
--- a/usr/src/usr.bin/login/login.c
+++ b/usr/src/usr.bin/login/login.c
@@ -1,468 +1,582 @@
+/*-
+ * Copyright (c) 1980, 1987, 1988, 1991 The Regents of the University
+ * of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *     This product includes software developed by the University of
+ *     California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
 #ifndef lint
 #ifndef lint
-static char *sccsid = "@(#)login.c     4.24 83/05/22";
-#endif
+char copyright[] =
+"@(#) Copyright (c) 1980, 1987, 1988, 1991 The Regents of the University of California.\n\
+ All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+static char sccsid[] = "@(#)login.c    5.73 (Berkeley) 6/29/91";
+#endif /* not lint */
 
 /*
  * login [ name ]
 
 /*
  * login [ name ]
- * login -r
+ * login -h hostname   (for telnetd, etc.)
+ * login -f name       (for pre-authenticated login: datakit, xterm, etc.)
  */
 
  */
 
-#include <sys/types.h>
-#include <sgtty.h>
+#include <sys/param.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <sys/resource.h>
+#include <sys/file.h>
+
 #include <utmp.h>
 #include <signal.h>
 #include <utmp.h>
 #include <signal.h>
+#include <errno.h>
+#include <ttyent.h>
+#include <syslog.h>
+#include <grp.h>
 #include <pwd.h>
 #include <pwd.h>
+#include <setjmp.h>
 #include <stdio.h>
 #include <stdio.h>
-#include <sys/stat.h>
-#include <lastlog.h>
-#define        QUOTA
-#include <sys/quota.h>
-#include <errno.h>
-
-#define        SCPYN(a, b)     strncpy(a, b, sizeof(a))
-
-#define NMAX   sizeof(utmp.ut_name)
-#define LMAX   sizeof(utmp.ut_line)
-
-#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] = "-";
+#include <string.h>
+#include <tzfile.h>
+#include "pathnames.h"
 
 
-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]))
+#define        TTYGRPNAME      "tty"           /* name of group to own ttys */
 
 
-char   *envinit[] =
-    {homedir, shell, "PATH=:/usr/ucb:/bin:/usr/bin", term, user, 0};
+/*
+ * 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;
+int    rootlogin;
+#ifdef KERBEROS
+int    notickets = 1;
+char   *instance;
+char   *krbtkfile_env;
+int    authok;
+#endif
 
 struct passwd *pwd;
 
 struct passwd *pwd;
-struct passwd *getpwnam();
-char   *strcat(), *rindex(), *index();
-int    setpwent();
-char   *ttyname();
-char   *crypt();
-char   *getpass();
-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
-};
-
-int    rflag;
-char   rusername[NMAX+1], lusername[NMAX+1];
-char   rpassword[NMAX+1];
-char   name[NMAX+1];
-char   *rhost;
+int    failures;
+char   term[64], *envinit[1], *hostname, *username, *tty;
 
 main(argc, argv)
 
 main(argc, argv)
-char **argv;
+       int argc;
+       char **argv;
 {
 {
-       register char *namep;
-       int t, f, c;
-       int invalid;
-       int quietlog;
-       int i;
-       FILE *nlfd;
-       char *ttyn;
-       int ldisc = 0, zero = 0;
-       FILE *hostf; int first = 1;
-
-       alarm(60);
-       signal(SIGQUIT, SIG_IGN);
-       signal(SIGINT, SIG_IGN);
-       nice(-100);
-       nice(20);
-       nice(0);
-       quota(Q_SETUID, 0, 0, 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)
-                       goto abnormal;
-               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 ((user = index(ahost, '\n')) != 0)
-                                       *user++ = '\0';
-                               if ((user = index(ahost, ' ')) != 0)
-                                       *user++ = '\0';
-                               if (!strcmp(rhost, ahost) &&
-                                   !strcmp(rusername, user ?
-                                   user : lusername)) {
-                                       fclose(hostf);
-                                       goto normal;
-                               }
-                       }
-                       fclose(hostf);
-               }
-               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");
-                               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;
+       extern int optind;
+       extern char *optarg, **environ;
+       struct timeval tp;
+       struct group *gr;
+       register int ch;
+       register char *p;
+       int ask, fflag, hflag, pflag, cnt, uid;
+       int quietlog, rval;
+       char *domain, *salt, *ttyn;
+       char tbuf[MAXPATHLEN + 2], tname[sizeof(_PATH_TTY) + 10];
+       char localhost[MAXHOSTNAMELEN];
+       char *ctime(), *ttyname(), *stypeof(), *crypt(), *getpass();
+       time_t time();
+       off_t lseek();
+       void timedout();
+
+       (void)signal(SIGALRM, timedout);
+       (void)alarm((u_int)timeout);
+       (void)signal(SIGQUIT, SIG_IGN);
+       (void)signal(SIGINT, SIG_IGN);
+       (void)setpriority(PRIO_PROCESS, 0, 0);
+
+       openlog("login", LOG_ODELAY, LOG_AUTH);
+
+       /*
+        * -p is used by getty to tell login not to destroy the environment
+        * -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
+        */
+       domain = NULL;
+       if (gethostname(localhost, sizeof(localhost)) < 0)
+               syslog(LOG_ERR, "couldn't get local hostname: %m");
+       else
+               domain = index(localhost, '.');
+
+       fflag = hflag = pflag = 0;
+       uid = getuid();
+       while ((ch = getopt(argc, argv, "fh:p")) != EOF)
+               switch (ch) {
+               case 'f':
+                       fflag = 1;
+                       break;
+               case 'h':
+                       if (uid) {
+                               (void)fprintf(stderr,
+                                   "login: -h option: %s\n", strerror(EPERM));
+                               exit(1);
                        }
                        }
-               goto again;
-               }
-abnormal:
-               rhost = 0;
-               rflag = -1;
-       }
-normal:
-       ioctl(0, TIOCLSET, &zero);      /* XXX */
-       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;
-                               }
+                       hflag = 1;
+                       if (domain && (p = index(optarg, '.')) &&
+                           strcasecmp(p, domain) == 0)
+                               *p = 0;
+                       hostname = optarg;
+                       break;
+               case 'p':
+                       pflag = 1;
+                       break;
+               case '?':
+               default:
+                       if (!uid)
+                               syslog(LOG_ERR, "invalid flag %c", ch);
+                       (void)fprintf(stderr,
+                           "usage: login [-fp] [-h hostname] [username]\n");
+                       exit(1);
                }
                }
-               ttyb.sg_flags = ECHO|CRMOD|ANYP|XTABS;
-       }
-       ioctl(0, TIOCSETP, &ttyb);      /* XXX */
-       ioctl(0, TIOCCSET, &tc);
-       for (t=3; t<20; t++)
-               close(t);
+       argc -= optind;
+       argv += optind;
+       if (*argv) {
+               username = *argv;
+               ask = 0;
+       } else
+               ask = 1;
+
+       for (cnt = getdtablesize(); cnt > 2; cnt--)
+               close(cnt);
+
        ttyn = ttyname(0);
        ttyn = ttyname(0);
-       if (ttyn==(char *)0)
-               ttyn = "/dev/tty??";
-       do {
-               ldisc = 0;
-               ioctl(0, TIOCSETD, &ldisc);
-               invalid = FALSE;
-               SCPYN(utmp.ut_name, "");
-               if (argc>1) {
-                       SCPYN(utmp.ut_name, argv[1]);
-                       argc = 0;
+       if (ttyn == NULL || *ttyn == '\0') {
+               (void)sprintf(tname, "%s??", _PATH_TTY);
+               ttyn = tname;
+       }
+       if (tty = rindex(ttyn, '/'))
+               ++tty;
+       else
+               tty = ttyn;
+
+       for (cnt = 0;; ask = 1) {
+               if (ask) {
+                       fflag = 0;
+                       getloginname();
                }
                }
-               if (rflag) {
-                       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;
-                               }
-                       }
-               if (rhost == 0) {
-                       setpwent();
-                       if ((pwd = getpwnam(utmp.ut_name)) == NULL)
-                               pwd = &nouser;
-                       endpwent();
+#ifdef KERBEROS
+               if ((instance = index(username, '.')) != NULL) {
+                       if (strncmp(instance, ".root", 5) == 0)
+                               rootlogin++;
+                       *instance++ = '\0';
+               } else {
+                       rootlogin = 0;
+                       instance = "";
                }
                }
-               if (!strcmp(pwd->pw_shell, "/bin/csh")) {
-                       ldisc = NTTYDISC;
-                       ioctl(0, TIOCSETD, &ldisc);
+#else
+               rootlogin = 0;
+#endif
+               if (strlen(username) > UT_NAMESIZE)
+                       username[UT_NAMESIZE] = '\0';
+
+               /*
+                * Note if trying multiple user names; log failures for
+                * previous user name, but don't bother logging one failure
+                * for nonexistent name (mistyped username).
+                */
+               if (failures && strcmp(tbuf, username)) {
+                       if (failures > (pwd ? 0 : 1))
+                               badlogin(tbuf);
+                       failures = 0;
                }
                }
-               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;
+               (void)strcpy(tbuf, username);
+
+               if (pwd = getpwnam(username))
+                       salt = pwd->pw_passwd;
+               else
+                       salt = "xx";
+
+               /*
+                * if we have a valid account name, and it doesn't have a
+                * password, or the -f option was specified and the caller
+                * is root or the caller isn't changing their uid, don't
+                * authenticate.
+                */
+               if (pwd && (*pwd->pw_passwd == '\0' ||
+                   fflag && (uid == 0 || uid == pwd->pw_uid)))
+                       break;
+               fflag = 0;
+               if (pwd && pwd->pw_uid == 0)
+                       rootlogin = 1;
+
+               (void)setpriority(PRIO_PROCESS, 0, -4);
+
+               p = getpass("Password:");
+
+               if (pwd) {
+#ifdef KERBEROS
+                       rval = klogin(pwd, instance, localhost, p);
+                       if (rval == 0)
+                               authok = 1;
+                       else if (rval == 1) {
+                               if (pwd->pw_uid != 0)
+                                       rootlogin = 0;
+                               rval = strcmp(crypt(p, salt), pwd->pw_passwd);
                        }
                        }
+#else
+                       if (pwd->pw_uid != 0)
+                               rootlogin = 0;
+#ifdef DES
+                       rval = strcmp(crypt(p, salt), pwd->pw_passwd);
+#else
+                       rval = strcmp(p, pwd->pw_passwd);
+#endif
+#endif
                }
                }
-               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);
-               }
-               if (!invalid && pwd->pw_uid == 0 &&
-                   !rootterm(ttyn+sizeof("/dev/")-1)) {
-                       logerr("ROOT LOGIN REFUSED %s",
-                           ttyn+sizeof("/dev/")-1);
-                       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);
+               bzero(p, strlen(p));
+
+               (void)setpriority(PRIO_PROCESS, 0, 0);
+
+               /*
+                * If trying to log in as root without Kerberos,
+                * but with insecure terminal, refuse the login attempt.
+                */
+#ifdef KERBEROS
+               if (authok == 0)
+#endif
+               if (pwd && rootlogin && !rootterm(tty)) {
+                       (void)fprintf(stderr,
+                           "%s login refused on this terminal.\n",
+                           pwd->pw_name);
+                       if (hostname)
+                               syslog(LOG_NOTICE,
+                                   "LOGIN %s REFUSED FROM %s ON TTY %s",
+                                   pwd->pw_name, hostname, tty);
+                       else
+                               syslog(LOG_NOTICE,
+                                   "LOGIN %s REFUSED ON TTY %s",
+                                    pwd->pw_name, tty);
+                       continue;
                }
                }
-               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 {
-                               printf("No directory!  Logging in with home=/\n");
-                               pwd->pw_dir = "/";
+
+               if (pwd && !rval)
+                       break;
+
+               (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);
+                               sleepexit(1);
                        }
                        }
+                       sleep((u_int)((cnt - 3) * 5));
                }
                }
-               if (rflag && invalid)
-                       exit(1);
-       } while (invalid);
-
-       if (quota(Q_SETUID, pwd->pw_uid, 0, 0) < 0) {
-               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("setuid");
-               sleep(5);
-               exit(0);
        }
        }
-       time(&utmp.ut_time);
-       t = ttyslot();
-       if (t>0 && (f = open("/etc/utmp", 1)) >= 0) {
-               lseek(f, (long)(t*sizeof(utmp)), 0);
-               SCPYN(utmp.ut_line, rindex(ttyn, '/')+1);
-               write(f, (char *)&utmp, sizeof(utmp));
-               close(f);
+
+       /* committed to login -- turn off timeout */
+       (void)alarm((u_int)0);
+
+       endpwent();
+
+       /* if user not super-user, check for disabled logins */
+       if (!rootlogin)
+               checknologin();
+
+       if (chdir(pwd->pw_dir) < 0) {
+               (void)printf("No home directory %s!\n", pwd->pw_dir);
+               if (chdir("/"))
+                       exit(0);
+               pwd->pw_dir = "/";
+               (void)printf("Logging in with home = \"/\".\n");
        }
        }
-       if (t>0 && (f = open("/usr/adm/wtmp", 1)) >= 0) {
-               lseek(f, 0L, 2);
-               write(f, (char *)&utmp, sizeof(utmp));
-               close(f);
+
+       quietlog = access(_PATH_HUSHLOGIN, F_OK) == 0;
+
+       if (pwd->pw_change || pwd->pw_expire)
+               (void)gettimeofday(&tp, (struct timezone *)NULL);
+       if (pwd->pw_change)
+               if (tp.tv_sec >= pwd->pw_change) {
+                       (void)printf("Sorry -- your password has expired.\n");
+                       sleepexit(1);
+               } else if (pwd->pw_change - tp.tv_sec <
+                   2 * DAYSPERWEEK * SECSPERDAY && !quietlog)
+                       (void)printf("Warning: your password expires on %s",
+                           ctime(&pwd->pw_expire));
+       if (pwd->pw_expire)
+               if (tp.tv_sec >= pwd->pw_expire) {
+                       (void)printf("Sorry -- your account has expired.\n");
+                       sleepexit(1);
+               } else if (pwd->pw_expire - tp.tv_sec <
+                   2 * DAYSPERWEEK * SECSPERDAY && !quietlog)
+                       (void)printf("Warning: your account expires on %s",
+                           ctime(&pwd->pw_expire));
+
+       /* nothing else left to fail -- really log in */
+       {
+               struct utmp utmp;
+
+               bzero((void *)&utmp, sizeof(utmp));
+               (void)time(&utmp.ut_time);
+               strncpy(utmp.ut_name, username, sizeof(utmp.ut_name));
+               if (hostname)
+                       strncpy(utmp.ut_host, hostname, sizeof(utmp.ut_host));
+               strncpy(utmp.ut_line, tty, sizeof(utmp.ut_line));
+               login(&utmp);
        }
        }
-       quietlog = 0;
-       if (access(qlog, 0) == 0)
-               quietlog = 1;
-       if ((f = open(lastlog, 2)) >= 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) {
-                       if (quietlog == 0)
-                       printf("Last login: %.*s on %.*s\n"
-                           , 24-5
-                           , (char *) ctime(&ll.ll_time)
-                           , 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, rindex(ttyn, '/')+1);
-               write(f, (char *) &ll, sizeof ll);
-               close(f);
+
+       dolastlog(quietlog);
+
+       (void)chown(ttyn, pwd->pw_uid,
+           (gr = getgrnam(TTYGRPNAME)) ? gr->gr_gid : pwd->pw_gid);
+       (void)setgid(pwd->pw_gid);
+
+       initgroups(username, pwd->pw_gid);
+
+       if (*pwd->pw_shell == '\0')
+               pwd->pw_shell = _PATH_BSHELL;
+
+       /* destroy environment unless user has requested preservation */
+       if (!pflag)
+               environ = envinit;
+       (void)setenv("HOME", pwd->pw_dir, 1);
+       (void)setenv("SHELL", pwd->pw_shell, 1);
+       if (term[0] == '\0')
+               strncpy(term, stypeof(tty), sizeof(term));
+       (void)setenv("TERM", term, 0);
+       (void)setenv("LOGNAME", pwd->pw_name, 1);
+       (void)setenv("USER", pwd->pw_name, 1);
+       (void)setenv("PATH", _PATH_DEFPATH, 0);
+#ifdef KERBEROS
+       if (krbtkfile_env)
+               (void)setenv("KRBTKFILE", krbtkfile_env, 1);
+#endif
+
+       if (tty[sizeof("tty")-1] == 'd')
+               syslog(LOG_INFO, "DIALUP %s, %s", tty, pwd->pw_name);
+       /* if fflag is on, assume caller/authenticator has logged root login */
+       if (rootlogin && fflag == 0)
+               if (hostname)
+                       syslog(LOG_NOTICE, "ROOT LOGIN (%s) ON %s FROM %s",
+                           username, tty, hostname);
+               else
+                       syslog(LOG_NOTICE, "ROOT LOGIN (%s) ON %s", username, tty);
+
+#ifdef KERBEROS
+       if (!quietlog && notickets == 1)
+               (void)printf("Warning: no Kerberos tickets issued.\n");
+#endif
+
+       if (!quietlog) {
+               struct stat st;
+
+               printf("%s%s",
+                       "386BSD Release 0.1 by William and Lynne Jolitz.\n",
+"Copyright (c) 1989,1990,1991,1992 William F. Jolitz. All rights reserved.\n\
+Based in part on work by the 386BSD User Community and the\n\
+BSD Networking Software, Release 2 by UCB EECS Department.\n");
+
+               motd();
+               (void)sprintf(tbuf, "%s/%s", _PATH_MAILDIR, pwd->pw_name);
+               if (stat(tbuf, &st) == 0 && st.st_size != 0)
+                       (void)printf("You have %smail.\n",
+                           (st.st_mtime > st.st_atime) ? "new " : "");
        }
        }
-       chown(ttyn, pwd->pw_uid, pwd->pw_gid);
-       chmod(ttyn, 0622);
-       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);
-       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);
-       if ((namep = rindex(pwd->pw_shell, '/')) == NULL)
-               namep = pwd->pw_shell;
+
+       (void)signal(SIGALRM, SIG_DFL);
+       (void)signal(SIGQUIT, SIG_DFL);
+       (void)signal(SIGINT, SIG_DFL);
+       (void)signal(SIGTSTP, SIG_IGN);
+
+       tbuf[0] = '-';
+       strcpy(tbuf + 1, (p = rindex(pwd->pw_shell, '/')) ?
+           p + 1 : pwd->pw_shell);
+
+       if (setlogin(pwd->pw_name) < 0)
+               syslog(LOG_ERR, "setlogin() failure: %m");
+
+       /* discard permissions last so can't get killed and drop core */
+       if (rootlogin)
+               (void) setuid(0);
        else
        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 (!quietlog) {
-               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");
+               (void) setuid(pwd->pw_uid);
+
+       execlp(pwd->pw_shell, tbuf, 0);
+       (void)fprintf(stderr, "%s: %s\n", pwd->pw_shell, strerror(errno));
+       exit(1);
+}
+
+#ifdef KERBEROS
+#define        NBUFSIZ         (UT_NAMESIZE + 1 + 5) /* .root suffix */
+#else
+#define        NBUFSIZ         (UT_NAMESIZE + 1)
+#endif
+
+getloginname()
+{
+       register int ch;
+       register char *p;
+       static char nbuf[NBUFSIZ];
+
+       for (;;) {
+               (void)printf("login: ");
+               for (p = nbuf; (ch = getchar()) != '\n'; ) {
+                       if (ch == EOF) {
+                               badlogin(username);
+                               exit(0);
+                       }
+                       if (p < nbuf + (NBUFSIZ - 1))
+                               *p++ = ch;
                }
                }
+               if (p > nbuf)
+                       if (nbuf[0] == '-')
+                               (void)fprintf(stderr,
+                                   "login names may not start with '-'.\n");
+                       else {
+                               *p = '\0';
+                               username = nbuf;
+                               break;
+                       }
        }
        }
-       
-       signal(SIGQUIT, SIG_DFL);
-       signal(SIGINT, SIG_DFL);
-       signal(SIGTSTP, SIG_IGN);
-       execlp(pwd->pw_shell, minusnam, 0);
-       perror(pwd->pw_shell);
-       printf("No shell\n");
+}
+
+void
+timedout()
+{
+       (void)fprintf(stderr, "Login timed out after %d seconds\n", timeout);
        exit(0);
 }
 
        exit(0);
 }
 
-int    stopmotd;
-catch()
+rootterm(ttyn)
+       char *ttyn;
+{
+       struct ttyent *t;
+
+       return((t = getttynam(ttyn)) && t->ty_status&TTY_SECURE);
+}
+
+jmp_buf motdinterrupt;
+
+motd()
+{
+       register int fd, nchars;
+       sig_t oldint;
+       void sigint();
+       char tbuf[8192];
+
+       if ((fd = open(_PATH_MOTDFILE, O_RDONLY, 0)) < 0)
+               return;
+       oldint = signal(SIGINT, sigint);
+       if (setjmp(motdinterrupt) == 0)
+               while ((nchars = read(fd, tbuf, sizeof(tbuf))) > 0)
+                       (void)write(fileno(stdout), tbuf, nchars);
+       (void)signal(SIGINT, oldint);
+       (void)close(fd);
+}
+
+void
+sigint()
+{
+       longjmp(motdinterrupt, 1);
+}
+
+checknologin()
 {
 {
+       register int fd, nchars;
+       char tbuf[8192];
 
 
-       signal(SIGINT, SIG_IGN);
-       stopmotd++;
+       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);
+       }
 }
 
 }
 
-rootterm(tty)
-       char *tty;
+dolastlog(quiet)
+       int quiet;
 {
 {
-       register FILE *fd;
-       char buf[100];
-
-       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);
+       struct lastlog ll;
+       int fd;
+       char *ctime();
+
+       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)printf("Last login: %.*s ",
+                                   24-5, (char *)ctime(&ll.ll_time));
+                               if (*ll.ll_host != '\0')
+                                       (void)printf("from %.*s\n",
+                                           sizeof(ll.ll_host), ll.ll_host);
+                               else
+                                       (void)printf("on %.*s\n",
+                                           sizeof(ll.ll_line), ll.ll_line);
+                       }
+                       (void)lseek(fd, (off_t)pwd->pw_uid * sizeof(ll), L_SET);
                }
                }
+               bzero((void *)&ll, sizeof(ll));
+               (void)time(&ll.ll_time);
+               strncpy(ll.ll_line, tty, sizeof(ll.ll_line));
+               if (hostname)
+                       strncpy(ll.ll_host, hostname, sizeof(ll.ll_host));
+               (void)write(fd, (char *)&ll, sizeof(ll));
+               (void)close(fd);
        }
        }
-       fclose(fd);
-       return(0);
 }
 
 }
 
-showmotd()
+badlogin(name)
+       char *name;
 {
 {
-       FILE *mf;
-       register c;
-
-       signal(SIGINT, catch);
-       if ((mf = fopen("/etc/motd","r")) != NULL) {
-               while ((c = getc(mf)) != EOF && stopmotd == 0)
-                       putchar(c);
-               fclose(mf);
+       if (failures == 0)
+               return;
+       if (hostname) {
+               syslog(LOG_NOTICE, "%d LOGIN FAILURE%s FROM %s",
+                   failures, failures > 1 ? "S" : "", hostname);
+               syslog(LOG_AUTHPRIV|LOG_NOTICE,
+                   "%d LOGIN FAILURE%s FROM %s, %s",
+                   failures, failures > 1 ? "S" : "", hostname, name);
+       } else {
+               syslog(LOG_NOTICE, "%d LOGIN FAILURE%s ON %s",
+                   failures, failures > 1 ? "S" : "", tty);
+               syslog(LOG_AUTHPRIV|LOG_NOTICE,
+                   "%d LOGIN FAILURE%s ON %s, %s",
+                   failures, failures > 1 ? "S" : "", tty, name);
        }
        }
-       signal(SIGINT, SIG_IGN);
 }
 
 #undef UNKNOWN
 }
 
 #undef UNKNOWN
-#define UNKNOWN "su"
+#define        UNKNOWN "su"
 
 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;
-
-       if (ttyid == NULL)
-               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'; 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);
-               }
-       }
-       fclose (f);
-       return (UNKNOWN);
-}
+       struct ttyent *t;
 
 
-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);
+       return(ttyid && (t = getttynam(ttyid)) ? t->ty_type : UNKNOWN);
 }
 
 }
 
-logerr(fmt, a1, a2, a3)
-       char *fmt, *a1, *a2, *a3;
+sleepexit(eval)
+       int eval;
 {
 {
-
+       sleep((u_int)5);
+       exit(eval);
 }
 }
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.