+/*-
+ * 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
-static char *sccsid = "@(#)login.c 4.30 (Berkeley) 83/06/13";
-#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 -r hostname (for rlogind)
- * login -h hostname (for telnetd, etc.)
+ * login -h hostname (for telnetd, etc.)
+ * login -f name (for pre-authenticated login: datakit, xterm, etc.)
*/
#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 <errno.h>
+#include <ttyent.h>
+#include <syslog.h>
+#include <grp.h>
#include <pwd.h>
+#include <setjmp.h>
#include <stdio.h>
-#include <lastlog.h>
-#include <errno.h>
-
-#define SCPYN(a, b) strncpy(a, b, sizeof(a))
+#include <string.h>
+#include <tzfile.h>
+#include "pathnames.h"
-#define NMAX sizeof(utmp.ut_name)
+#define TTYGRPNAME "tty" /* name of group to own ttys */
-#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] = "-";
/*
- * This bounds the time given to login. We initialize it here
- * so it can be patched on machines where it's too small.
+ * This bounds the time given to login. Not a define so it can
+ * be patched on machines where it's too small.
*/
-int timeout = 60;
-
-char homedir[64] = "HOME=";
-char shell[64] = "SHELL=";
-char term[64] = "TERM=";
-char user[20] = "USER=";
-
-char *envinit[] =
- { homedir, shell, "PATH=:/usr/ucb:/bin:/usr/bin", term, user, 0 };
+int timeout = 300;
+int rootlogin;
+#ifdef KERBEROS
+int notickets = 1;
+char *instance;
+char *krbtkfile_env;
+int authok;
+#endif
struct passwd *pwd;
-struct passwd *getpwnam();
-char *strcat(), *rindex(), *index();
-int setpwent();
-int timedout();
-char *ttyname();
-char *crypt();
-char *getpass();
-char *stypeof();
-extern char **environ;
-extern int errno;
-
-struct tchars tc = {
- CINTR, CQUIT, CSTART, CSTOP, CEOT, CBRK
-};
-struct ltchars ltc = {
- 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)
- char *argv[];
+ int argc;
+ char **argv;
{
- register char *namep;
- int t, f, c, i;
- int invalid, quietlog;
- FILE *nlfd;
- char *ttyn;
- int ldisc = 0, zero = 0;
-
- signal(SIGALRM, timedout);
- alarm(timeout);
- signal(SIGQUIT, SIG_IGN);
- signal(SIGINT, SIG_IGN);
- setpriority(PRIO_PROCESS, 0, 0);
- quota(Q_SETUID, 0, 0, 0);
+ 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);
+
/*
- * -r is used by rlogind to cause the autologin protocol;
- * -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
+ * -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
*/
- if (argc > 1) {
- if (strcmp(argv[1], "-r") == 0) {
- rflag = doremotelogin(argv[2]);
- SCPYN(utmp.ut_host, argv[2]);
- argc = 0;
- }
- if (strcmp(argv[1], "-h") == 0 && getuid() == 0) {
- SCPYN(utmp.ut_host, argv[2]);
- argc = 0;
+ 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);
+ }
+ 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);
}
- }
- ioctl(0, TIOCLSET, &zero);
- ioctl(0, TIOCNXCL, 0);
- 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);
- ioctl(0, TIOCSLTC, <c);
- ioctl(0, TIOCSETC, &tc);
- ioctl(0, TIOCSETP, &ttyb);
- for (t = getdtablesize(); t > 3; 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);
- if (ttyn==(char *)0)
- ttyn = "/dev/tty??";
- do {
- ldisc = 0;
- ioctl(0, TIOCSETD, &ldisc);
- invalid = FALSE;
- SCPYN(utmp.ut_name, "");
- /*
- * Name specified, take it.
- */
- 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 remote login take given name,
- * otherwise prompt user for something.
- */
- if (rflag) {
- SCPYN(utmp.ut_name, lusername);
- /* autologin failed, prompt for passwd */
- if (rflag == -1)
- rflag = 0;
+#ifdef KERBEROS
+ if ((instance = index(username, '.')) != NULL) {
+ if (strncmp(instance, ".root", 5) == 0)
+ rootlogin++;
+ *instance++ = '\0';
} else {
- getloginname(&utmp);
- }
- if (!strcmp(pwd->pw_shell, "/bin/csh")) {
- ldisc = NTTYDISC;
- ioctl(0, TIOCSETD, &ldisc);
+ rootlogin = 0;
+ instance = "";
}
+#else
+ rootlogin = 0;
+#endif
+ if (strlen(username) > UT_NAMESIZE)
+ username[UT_NAMESIZE] = '\0';
+
/*
- * If no remote login authentication and
- * a password exists for this user, prompt
- * for one and verify it.
+ * 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 (!rflag && *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 (failures && strcmp(tbuf, username)) {
+ if (failures > (pwd ? 0 : 1))
+ badlogin(tbuf);
+ failures = 0;
}
+ (void)strcpy(tbuf, username);
+
+ if (pwd = getpwnam(username))
+ salt = pwd->pw_passwd;
+ else
+ salt = "xx";
+
/*
- * If user not super-user, check for logins disabled.
+ * 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->pw_uid != 0 && (nlfd = fopen(nolog, "r")) > 0) {
- while ((c = getc(nlfd)) != EOF)
- putchar(c);
- fflush(stdout);
- sleep(5);
- exit(0);
+ 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
}
+ bzero(p, strlen(p));
+
+ (void)setpriority(PRIO_PROCESS, 0, 0);
+
/*
- * If valid so far and root is logging in,
- * see if root logins on this terminal are permitted.
+ * If trying to log in as root without Kerberos,
+ * but with insecure terminal, refuse the login attempt.
*/
- 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);
+#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! %s\n",
- "Logging in with home=/");
- 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));
}
- /*
- * Remote login invalid must have been because
- * of a restriction of some sort, no extra chances.
- */
- if (rflag && invalid)
- exit(1);
- } while (invalid);
-/* committed to login turn off timeout */
- alarm(0);
-
- 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);
- }
- if (t > 0 && (f = open("/usr/adm/wtmp", 1)) >= 0) {
- lseek(f, 0L, 2);
- 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");
}
- quietlog = access(qlog, 0) == 0;
- 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 && !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, rindex(ttyn, '/')+1);
- SCPYN(ll.ll_host, utmp.ut_host);
- write(f, (char *) &ll, sizeof ll);
- 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);
}
- 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;
- else
- namep++;
- strcat(minusnam, namep);
- umask(022);
- if (ttyn[sizeof("/dev/tty")-1] == 'd')
- logerr("DIALUP %s %s\n", ttyn+sizeof("/dev/")-1, pwd->pw_name);
+
+ 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) {
- 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");
- }
+ 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 " : "");
}
- signal(SIGALRM, SIG_DFL);
- 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");
- exit(0);
+
+ (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
+ (void) setuid(pwd->pw_uid);
+
+ execlp(pwd->pw_shell, tbuf, 0);
+ (void)fprintf(stderr, "%s: %s\n", pwd->pw_shell, strerror(errno));
+ exit(1);
}
-getloginname(up)
- register struct utmp *up;
+#ifdef KERBEROS
+#define NBUFSIZ (UT_NAMESIZE + 1 + 5) /* .root suffix */
+#else
+#define NBUFSIZ (UT_NAMESIZE + 1)
+#endif
+
+getloginname()
{
- register char *namep;
- char c;
-
- while (up->ut_name[0] == '\0') {
- namep = utmp.ut_name;
- printf("login: ");
- while ((c = getchar()) != '\n') {
- if (c == ' ')
- c = '_';
- if (c == EOF)
+ 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 (namep < up->ut_name+NMAX)
- *namep++ = c;
+ }
+ 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;
+ }
}
- setpwent();
- if ((pwd = getpwnam(utmp.ut_name)) == NULL)
- pwd = &nouser;
- endpwent();
}
+void
timedout()
{
-
- printf("Login timed out after %d seconds\n", timeout);
+ (void)fprintf(stderr, "Login timed out after %d seconds\n", timeout);
exit(0);
}
-int stopmotd;
-catch()
+rootterm(ttyn)
+ char *ttyn;
{
+ struct ttyent *t;
- signal(SIGINT, SIG_IGN);
- stopmotd++;
+ return((t = getttynam(ttyn)) && t->ty_status&TTY_SECURE);
}
-rootterm(tty)
- char *tty;
+jmp_buf motdinterrupt;
+
+motd()
{
- 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);
- }
- }
- fclose(fd);
- return(0);
+ 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);
}
-showmotd()
+void
+sigint()
{
- 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);
- }
- signal(SIGINT, SIG_IGN);
+ longjmp(motdinterrupt, 1);
}
-#undef UNKNOWN
-#define UNKNOWN "su"
-
-char *
-stypeof(ttyid)
- char *ttyid;
+checknologin()
{
- 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);
- }
+ register int fd, nchars;
+ char tbuf[8192];
+
+ 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);
}
- fclose (f);
- return (UNKNOWN);
}
-doremotelogin(host)
- char *host;
+dolastlog(quiet)
+ int quiet;
{
- FILE *hostf;
- int first = 1;
-
- getstr(rusername, sizeof (rusername), "remuser");
- getstr(lusername, sizeof (lusername), "locuser");
- getstr(term+5, sizeof(term)-5, "Terminal type");
- if (getuid())
- goto bad;
- setpwent();
- pwd = getpwnam(lusername);
- endpwent();
- if (pwd == NULL)
- goto bad;
- 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(host, ahost) &&
- !strcmp(rusername, user ? user : lusername)) {
- fclose(hostf);
- 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);
}
- fclose(hostf);
+ 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);
}
- 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 bad;
- }
- hostf = fopen(rhosts, "r");
- fstat(fileno(hostf), &sbuf);
- if (sbuf.st_uid && sbuf.st_uid != pwd->pw_uid) {
- printf("login: Bad .rhosts ownership.\r\n");
- fclose(hostf);
- goto bad;
- }
- goto again;
- }
-bad:
- return (-1);
}
-getstr(buf, cnt, err)
- char *buf;
- int cnt;
- char *err;
+badlogin(name)
+ char *name;
{
- 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);
+ 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);
+ }
}
-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]))
+#undef UNKNOWN
+#define UNKNOWN "su"
-doremoteterm(term, tp)
- char *term;
- struct sgttyb *tp;
+char *
+stypeof(ttyid)
+ char *ttyid;
{
- char *cp = index(term, '/');
- register int i;
-
- if (cp) {
- *cp++ = 0;
- for (i = 0; i < NSPEEDS; i++)
- if (!strcmp(speeds[i], cp)) {
- tp->sg_ispeed = tp->sg_ospeed = i;
- break;
- }
- }
- tp->sg_flags = ECHO|CRMOD|ANYP|XTABS;
+ struct ttyent *t;
+
+ return(ttyid && (t = getttynam(ttyid)) ? t->ty_type : UNKNOWN);
}
-logerr(fmt, a1, a2, a3)
- char *fmt, *a1, *a2, *a3;
+sleepexit(eval)
+ int eval;
{
-#ifdef LOGERR
- FILE *cons = fopen("/dev/console", "w");
-
- if (cons != NULL) {
- fprintf(cons, fmt, a1, a2, a3);
- fputc('\r', cons);
- fclose(cons);
- }
-#endif
+ sleep((u_int)5);
+ exit(eval);
}