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[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 ae1f834..33baab4 100644 (file)
--- a/usr/src/usr.bin/login/login.c
+++ b/usr/src/usr.bin/login/login.c
@@ -22,7 +22,7 @@ char copyright[] =
 #endif /* not lint */
 
 #ifndef lint
 #endif /* not lint */
 
 #ifndef lint

-static char sccsid[] = "@(#)login.c    5.28 (Berkeley) %G%";
+static char sccsid[] = "@(#)login.c    5.36 (Berkeley) %G%";

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


@@ -50,48 +50,54 @@ static char sccsid[] = "@(#)login.c 5.28 (Berkeley) %G%";
 #include <setjmp.h>
 #include <stdio.h>
 #include <strings.h>
 #include <setjmp.h>
 #include <stdio.h>
 #include <strings.h>

+#include "pathnames.h"

 
 #define        TTYGRPNAME      "tty"           /* name of group to own ttys */
 
 
 #define        TTYGRPNAME      "tty"           /* name of group to own ttys */
 

-#define        MOTDFILE        "/etc/motd"
-#define        MAILDIR         "/usr/spool/mail"
-#define        NOLOGIN         "/etc/nologin"
-#define        HUSHLOGIN       ".hushlogin"
-#define        LASTLOG         "/usr/adm/lastlog"
-#define        BSHELL          "/bin/sh"
-

 /*
  * This bounds the time given to login.  Not a define so it can
  * be patched on machines where it's too small.
  */
 int    timeout = 300;
 
 /*
  * This bounds the time given to login.  Not a define so it can
  * be patched on machines where it's too small.
  */
 int    timeout = 300;
 

-struct passwd *pwd;
-int repeatcnt;
-char term[64], *hostname, *username, *tty;
+struct passwd *pwd;
+int    failures;
+char   term[64], *hostname, *username, *tty;

 
 

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

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

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

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

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

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

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

        struct group *gr;
        register int ch;
        register char *p;
        int ask, fflag, hflag, pflag, cnt;
        int quietlog, passwd_req, ioctlval, timedout();
        struct group *gr;
        register int ch;
        register char *p;
        int ask, fflag, hflag, pflag, cnt;
        int quietlog, passwd_req, ioctlval, timedout();

-       char *domain, *salt, *envinit[1], *ttyn;
+       char *domain, *salt, *envinit[1], *ttyn, *pp;

        char tbuf[MAXPATHLEN + 2];
        char tbuf[MAXPATHLEN + 2];

-       char *ttyname(), *stypeof(), *crypt(), *getpass();
+       char *ctime(), *ttyname(), *stypeof(), *crypt(), *getpass();

        time_t time();
        off_t lseek();
 
        time_t time();
        off_t lseek();
 


@@ -141,10 +147,9 @@ main(argc, argv)
        argc -= optind;
        argv += optind;
        if (*argv) {
        argc -= optind;
        argv += optind;
        if (*argv) {

-               ask = 0;

                username = *argv;
                username = *argv;

-       }
-       else
+               ask = 0;
+       } else

                ask = 1;
 
        ioctlval = 0;
                ask = 1;
 
        ioctlval = 0;


@@ -179,20 +184,18 @@ main(argc, argv)
                        fflag = 0;
                        getloginname();
                }
                        fflag = 0;
                        getloginname();
                }

-               /* note if trying multiple login's */
-               if (repeatcnt) {
-                       if (strcmp(tbuf, username)) {
+               /*
+                * 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);
                                badlogin(tbuf);

-                               repeatcnt = 1;
-                               (void)strcpy(tbuf, username);
-                       }
-                       else
-                               ++repeatcnt;
-               }
-               else {
-                       repeatcnt = 1;
-                       (void)strcpy(tbuf, username);
+                       failures = 0;

                }
                }

+               (void)strcpy(tbuf, username);

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


@@ -217,16 +220,20 @@ main(argc, argv)
                 * If no pre-authentication and a password exists
                 * for this user, prompt for one and verify it.
                 */
                 * If no pre-authentication and a password exists
                 * for this user, prompt for one and verify it.
                 */

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

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

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

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

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

                if (pwd && !strcmp(p, pwd->pw_passwd))
                        break;
 
                printf("Login incorrect\n");
                if (pwd && !strcmp(p, pwd->pw_passwd))
                        break;
 
                printf("Login incorrect\n");

+               failures++;

                /* we allow 10 tries, but after 3 we start backing off */
                if (++cnt > 3) {
                        if (cnt >= 10) {
                /* we allow 10 tries, but after 3 we start backing off */
                if (++cnt > 3) {
                        if (cnt >= 10) {


@@ -241,20 +248,16 @@ main(argc, argv)
        /* committed to login -- turn off timeout */
        (void)alarm((u_int)0);
 
        /* committed to login -- turn off timeout */
        (void)alarm((u_int)0);
 

-       /* log any mistakes -- don't count last one */
-       --repeatcnt;
-       badlogin(username);
-

        /*
         * If valid so far and root is logging in, see if root logins on
         * this terminal are permitted.
         */
        /*
         * If valid so far and root is logging in, see if root logins on
         * this terminal are permitted.
         */

-       if (pwd->pw_uid == 0 && !rootterm()) {
+       if (pwd->pw_uid == 0 && !rootterm(tty)) {

                if (hostname)
                if (hostname)

-                       syslog(LOG_ERR, "ROOT LOGIN REFUSED ON %s FROM %s",
-                           tty, hostname);
+                       syslog(LOG_NOTICE, "ROOT LOGIN REFUSED FROM %s",
+                           hostname);

                else
                else

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

                printf("Login incorrect\n");
                sleepexit(1);
        }
                printf("Login incorrect\n");
                sleepexit(1);
        }


@@ -283,18 +286,68 @@ main(argc, argv)
                printf("Logging in with home = \"/\".\n");
        }
 
                printf("Logging in with home = \"/\".\n");
        }
 

+#define        TWOWEEKS        (14*24*60*60)
+       if (pwd->pw_change || pwd->pw_expire)
+               (void)gettimeofday(&tp, (struct timezone *)NULL);
+       if (pwd->pw_change)
+               if (tp.tv_sec >= pwd->pw_change) {
+                       printf("Sorry -- your password has expired.\n");
+                       sleepexit(1);
+               }
+               else if (tp.tv_sec - pwd->pw_change < TWOWEEKS) {
+                       ttp = localtime(&pwd->pw_change);
+                       printf("Warning: your password expires on %s %d, 19%d\n",
+                           months[ttp->tm_mon], ttp->tm_mday, ttp->tm_year);
+               }
+       if (pwd->pw_expire)
+               if (tp.tv_sec >= pwd->pw_expire) {
+                       printf("Sorry -- your account has expired.\n");
+                       sleepexit(1);
+               }
+               else if (tp.tv_sec - pwd->pw_expire < TWOWEEKS) {
+                       ttp = localtime(&pwd->pw_expire);
+                       printf("Warning: your account expires on %s %d, 19%d\n",
+                           months[ttp->tm_mon], ttp->tm_mday, ttp->tm_year);
+               }
+
+#define        TWOWEEKS        (14*24*60*60)
+       if (pwd->pw_change || pwd->pw_expire)
+               (void)gettimeofday(&tp, (struct timezone *)NULL);
+       if (pwd->pw_change)
+               if (tp.tv_sec >= pwd->pw_change) {
+                       printf("Sorry -- your password has expired.\n");
+                       sleepexit(1);
+               }
+               else if (tp.tv_sec - pwd->pw_change < TWOWEEKS) {
+                       ttp = localtime(&pwd->pw_change);
+                       printf("Warning: your password expires on %s %d, 19%d\n",
+                           months[ttp->tm_mon], ttp->tm_mday, ttp->tm_year);
+               }
+       if (pwd->pw_expire)
+               if (tp.tv_sec >= pwd->pw_expire) {
+                       printf("Sorry -- your account has expired.\n");
+                       sleepexit(1);
+               }
+               else if (tp.tv_sec - pwd->pw_expire < TWOWEEKS) {
+                       ttp = localtime(&pwd->pw_expire);
+                       printf("Warning: your account expires on %s %d, 19%d\n",
+                           months[ttp->tm_mon], ttp->tm_mday, ttp->tm_year);
+               }
+

        /* nothing else left to fail -- really log in */
        {
                struct utmp utmp;
 
        /* nothing else left to fail -- really log in */
        {
                struct utmp utmp;
 

+               bzero((char *)&utmp, sizeof(utmp));

                (void)time(&utmp.ut_time);
                strncpy(utmp.ut_name, username, sizeof(utmp.ut_name));
                (void)time(&utmp.ut_time);
                strncpy(utmp.ut_name, username, sizeof(utmp.ut_name));

-               strncpy(utmp.ut_host, hostname, sizeof(utmp.ut_host));
+               if (hostname)
+                       strncpy(utmp.ut_host, hostname, sizeof(utmp.ut_host));

                strncpy(utmp.ut_line, tty, sizeof(utmp.ut_line));
                login(&utmp);
        }
 
                strncpy(utmp.ut_line, tty, sizeof(utmp.ut_line));
                login(&utmp);
        }
 

-       quietlog = access(HUSHLOGIN, F_OK) == 0;
+       quietlog = access(_PATH_HUSHLOGIN, F_OK) == 0;

        dolastlog(quietlog);
 
        if (!hflag) {                                   /* XXX */
        dolastlog(quietlog);
 
        if (!hflag) {                                   /* XXX */


@@ -314,9 +367,9 @@ main(argc, argv)
        (void)setuid(pwd->pw_uid);
 
        if (*pwd->pw_shell == '\0')
        (void)setuid(pwd->pw_uid);
 
        if (*pwd->pw_shell == '\0')

-               pwd->pw_shell = BSHELL;
+               pwd->pw_shell = _PATH_BSHELL;

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

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

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


@@ -327,7 +380,7 @@ main(argc, argv)
        (void)setenv("HOME", pwd->pw_dir, 1);
        (void)setenv("SHELL", pwd->pw_shell, 1);
        if (term[0] == '\0')
        (void)setenv("HOME", pwd->pw_dir, 1);
        (void)setenv("SHELL", pwd->pw_shell, 1);
        if (term[0] == '\0')

-               strncpy(term, stypeof(), sizeof(term));
+               strncpy(term, stypeof(tty), sizeof(term));

        (void)setenv("TERM", term, 0);
        (void)setenv("USER", pwd->pw_name, 1);
        (void)setenv("PATH", "/usr/ucb:/bin:/usr/bin:", 0);
        (void)setenv("TERM", term, 0);
        (void)setenv("USER", pwd->pw_name, 1);
        (void)setenv("PATH", "/usr/ucb:/bin:/usr/bin:", 0);


@@ -336,16 +389,16 @@ main(argc, argv)
                syslog(LOG_INFO, "DIALUP %s, %s", tty, pwd->pw_name);
        if (pwd->pw_uid == 0)
                if (hostname)
                syslog(LOG_INFO, "DIALUP %s, %s", tty, pwd->pw_name);
        if (pwd->pw_uid == 0)
                if (hostname)

-                       syslog(LOG_NOTICE, "ROOT LOGIN %s FROM %s",
+                       syslog(LOG_NOTICE, "ROOT LOGIN ON %s FROM %s",

                            tty, hostname);
                else
                            tty, hostname);
                else

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

 
        if (!quietlog) {
                struct stat st;
 
                motd();
 
        if (!quietlog) {
                struct stat st;
 
                motd();

-               (void)sprintf(tbuf, "%s/%s", MAILDIR, pwd->pw_name);
+               (void)sprintf(tbuf, "%s/%s", _PATH_MAILDIR, pwd->pw_name);

                if (stat(tbuf, &st) == 0 && st.st_size != 0)
                        printf("You have %smail.\n",
                            (st.st_mtime > st.st_atime) ? "new " : "");
                if (stat(tbuf, &st) == 0 && st.st_size != 0)
                        printf("You have %smail.\n",
                            (st.st_mtime > st.st_atime) ? "new " : "");


@@ -399,11 +452,12 @@ timedout()
        exit(0);
 }
 
        exit(0);
 }
 

-rootterm()
+rootterm(ttyn)
+       char *ttyn;

 {
        struct ttyent *t;
 
 {
        struct ttyent *t;
 

-       return((t = getttynam(tty)) && t->ty_status&TTY_SECURE);
+       return((t = getttynam(ttyn)) && t->ty_status&TTY_SECURE);

 }
 
 jmp_buf motdinterrupt;
 }
 
 jmp_buf motdinterrupt;


@@ -414,7 +468,7 @@ motd()
        int (*oldint)(), sigint();
        char tbuf[8192];
 
        int (*oldint)(), sigint();
        char tbuf[8192];
 

-       if ((fd = open(MOTDFILE, O_RDONLY, 0)) < 0)
+       if ((fd = open(_PATH_MOTDFILE, O_RDONLY, 0)) < 0)

                return;
        oldint = signal(SIGINT, sigint);
        if (setjmp(motdinterrupt) == 0)
                return;
        oldint = signal(SIGINT, sigint);
        if (setjmp(motdinterrupt) == 0)


@@ -434,7 +488,7 @@ checknologin()
        register int fd, nchars;
        char tbuf[8192];
 
        register int fd, nchars;
        char tbuf[8192];
 

-       if ((fd = open(NOLOGIN, O_RDONLY, 0)) >= 0) {
+       if ((fd = open(_PATH_NOLOGIN, O_RDONLY, 0)) >= 0) {

                while ((nchars = read(fd, tbuf, sizeof(tbuf))) > 0)
                        (void)write(fileno(stdout), tbuf, nchars);
                sleepexit(0);
                while ((nchars = read(fd, tbuf, sizeof(tbuf))) > 0)
                        (void)write(fileno(stdout), tbuf, nchars);
                sleepexit(0);


@@ -446,8 +500,10 @@ dolastlog(quiet)
 {
        struct lastlog ll;
        int fd;
 {
        struct lastlog ll;
        int fd;

+       char *ctime();
+       char *ctime();

 
 

-       if ((fd = open(LASTLOG, O_RDWR, 0)) >= 0) {
+       if ((fd = open(_PATH_LASTLOG, O_RDWR, 0)) >= 0) {

                (void)lseek(fd, (off_t)pwd->pw_uid * sizeof(ll), L_SET);
                if (!quiet) {
                        if (read(fd, (char *)&ll, sizeof(ll)) == sizeof(ll) &&
                (void)lseek(fd, (off_t)pwd->pw_uid * sizeof(ll), L_SET);
                if (!quiet) {
                        if (read(fd, (char *)&ll, sizeof(ll)) == sizeof(ll) &&


@@ -463,9 +519,11 @@ dolastlog(quiet)
                        }
                        (void)lseek(fd, (off_t)pwd->pw_uid * sizeof(ll), L_SET);
                }
                        }
                        (void)lseek(fd, (off_t)pwd->pw_uid * sizeof(ll), L_SET);
                }

+               bzero((char *)&ll, sizeof(ll));

                (void)time(&ll.ll_time);
                strncpy(ll.ll_line, tty, sizeof(ll.ll_line));
                (void)time(&ll.ll_time);
                strncpy(ll.ll_line, tty, sizeof(ll.ll_line));

-               strncpy(ll.ll_host, hostname, sizeof(ll.ll_host));
+               if (hostname)
+                       strncpy(ll.ll_host, hostname, sizeof(ll.ll_host));

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


@@ -474,25 +532,26 @@ dolastlog(quiet)
 badlogin(name)
        char *name;
 {
 badlogin(name)
        char *name;
 {

-       if (!repeatcnt)
+       if (failures == 0)

                return;
        if (hostname)
                return;
        if (hostname)

-               syslog(LOG_ERR, "%d LOGIN FAILURE%s ON %s FROM %s, %s",
-                   repeatcnt, repeatcnt > 1 ? "S" : "", tty, hostname, name);
+               syslog(LOG_NOTICE, "%d LOGIN FAILURE%s FROM %s, %s",
+                   failures, failures > 1 ? "S" : "", hostname, name);

        else
        else

-               syslog(LOG_ERR, "%d LOGIN FAILURE%s ON %s, %s",
-                   repeatcnt, repeatcnt > 1 ? "S" : "", tty, name);
+               syslog(LOG_NOTICE, "%d LOGIN FAILURE%s ON %s, %s",
+                   failures, failures > 1 ? "S" : "", tty, name);

 }
 
 #undef UNKNOWN
 #define        UNKNOWN "su"
 
 char *
 }
 
 #undef UNKNOWN
 #define        UNKNOWN "su"
 
 char *

-stypeof()
+stypeof(ttyid)
+       char *ttyid;

 {
        struct ttyent *t;
 
 {
        struct ttyent *t;
 

-       return(tty && (t = getttynam(tty)) ? t->ty_type : UNKNOWN);
+       return(ttyid && (t = getttynam(ttyid)) ? t->ty_type : UNKNOWN);

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