/*
- * 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.
+ * Copyright (c) 1980, 1987, 1988 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that the above copyright notice and this paragraph are
+ * duplicated in all such forms and that any documentation,
+ * advertising materials, and other materials related to such
+ * distribution and use acknowledge that the software was developed
+ * by the University of California, Berkeley. The name of the
+ * University may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#ifndef lint
char copyright[] =
-"@(#) Copyright (c) 1980 Regents of the University of California.\n\
+"@(#) Copyright (c) 1980, 1987, 1988 The Regents of the University of California.\n\
All rights reserved.\n";
-#endif not lint
+#endif /* not lint */
#ifndef lint
-static char sccsid[] = "@(#)login.c 5.21 (Berkeley) %G%";
-#endif not lint
+static char sccsid[] = "@(#)login.c 5.41 (Berkeley) %G%";
+#endif /* not lint */
/*
* login [ name ]
*/
#include <sys/param.h>
-#include <sys/quota.h>
+#include <ufs/quota.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <sys/file.h>
+#include <sys/ioctl.h>
-#include <sgtty.h>
#include <utmp.h>
#include <signal.h>
-#include <pwd.h>
-#include <stdio.h>
-#include <lastlog.h>
#include <errno.h>
#include <ttyent.h>
#include <syslog.h>
#include <grp.h>
+#include <pwd.h>
+#include <setjmp.h>
+#include <stdio.h>
+#include <strings.h>
+#include <tzfile.h>
+#include "pathnames.h"
-#define TTYGRPNAME "tty" /* name of group to own ttys */
-#define TTYGID(gid) tty_gid(gid) /* gid that owns all ttys */
-
-#define SCMPN(a, b) strncmp(a, b, sizeof(a))
-#define SCPYN(a, b) strncpy(a, b, sizeof(a))
-
-#define NMAX sizeof(utmp.ut_name)
-#define HMAX sizeof(utmp.ut_host)
-
-#define FALSE 0
-#define TRUE -1
+#define TTYGRPNAME "tty" /* name of group to own ttys */
-char nolog[] = "/etc/nologin";
-char qlog[] = ".hushlogin";
-char maildir[30] = "/usr/spool/mail/";
-char lastlog[] = "/usr/adm/lastlog";
-struct passwd nouser = {"", "nope", -1, -1, -1, "", "", "", "" };
-struct sgttyb ttyb;
-struct utmp utmp;
-char minusnam[16] = "-";
-char *envinit[1]; /* now set by setenv calls */
/*
- * This bounds the time given to login. We initialize it here
- * so it can be patched on machines where it's too small.
+ * 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;
-char term[64];
-
struct passwd *pwd;
-char *strcat(), *rindex(), *index();
-int timedout();
-char *ttyname();
-char *crypt();
-char *getpass();
-char *stypeof();
-extern int errno;
+int failures;
+char term[64], *hostname, *username, *tty;
+struct sgttyb sgttyb;
struct tchars tc = {
CINTR, CQUIT, CSTART, CSTOP, CEOT, CBRK
};
CSUSP, CDSUSP, CRPRNT, CFLUSH, CWERASE, CLNEXT
};
-struct winsize win = { 0, 0, 0, 0 };
+char *months[] =
+ { "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug",
+ "Sep", "Oct", "Nov", "Dec" };
-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;
+char *months[] =
+ { "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug",
+ "Sep", "Oct", "Nov", "Dec" };
main(argc, argv)
- char *argv[];
+ int argc;
+ char **argv;
{
- extern char **environ;
- register char *namep;
- 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();
-
- 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 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, rflag, cnt;
+ int quietlog, passwd_req, ioctlval, timedout();
+ char *domain, *salt, *envinit[1], *ttyn, *pp;
+ 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)signal(SIGALRM, timedout);
+ (void)alarm((u_int)timeout);
+ (void)signal(SIGQUIT, SIG_IGN);
+ (void)signal(SIGINT, SIG_IGN);
+ (void)setpriority(PRIO_PROCESS, 0, 0);
+ (void)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
+ * -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");
+ domain = NULL;
+ if (gethostname(localhost, sizeof(localhost)) < 0)
+ syslog(LOG_ERR, "couldn't get local hostname: %m");
+ else
+ domain = index(localhost, '.');
+
+ fflag = hflag = pflag = rflag = 0;
+ passwd_req = 1;
+ while ((ch = getopt(argc, argv, "fh:pr:")) != EOF)
+ switch (ch) {
+ case 'f':
+ if (rflag) {
+ fprintf(stderr,
+ "login: only one of -r and -f allowed.\n");
exit(1);
}
- if (argv[2] == 0)
+ fflag = 1;
+ break;
+ case 'h':
+ if (getuid()) {
+ (void)fprintf(stderr,
+ "login: -h for super-user only.\n");
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");
+ fprintf(stderr,
+ "login: only one of -r and -h 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++;
+ hflag = 1;
+ if (domain && (p = index(optarg, '.')) &&
+ strcasecmp(p, domain) == 0)
+ *p = 0;
+ hostname = optarg;
+ break;
+ case 'p':
pflag = 1;
- continue;
+ break;
+ case 'r':
+ if (hflag || fflag) {
+ fprintf(stderr,
+ "login: -f and -h not allowed with -r.\n");
+ exit(1);
+ }
+ if (getuid()) {
+ fprintf(stderr,
+ "login: -r for super-user only.\n");
+ exit(1);
+ }
+ /* "-r hostname" must be last args */
+ if (optind != argc) {
+ fprintf(stderr, "Syntax error.\n");
+ exit(1);
+ }
+ rflag = 1;
+ passwd_req = (doremotelogin(optarg) == -1);
+ if (domain && (p = index(optarg, '.')) &&
+ !strcmp(p, domain))
+ *p = '\0';
+ hostname = optarg;
+ break;
+ case '?':
+ default:
+ (void)fprintf(stderr,
+ "usage: login [-fp] [username]\n");
+ exit(1);
}
- break;
- }
- ioctl(0, TIOCLSET, &zero);
- ioctl(0, TIOCNXCL, 0);
- ioctl(0, FIONBIO, &zero);
- ioctl(0, FIOASYNC, &zero);
- ioctl(0, TIOCGETP, &ttyb);
+ argc -= optind;
+ argv += optind;
+ if (*argv) {
+ username = *argv;
+ ask = 0;
+ } else
+ ask = 1;
+ if (rflag)
+ ask = 0;
+
+ ioctlval = 0;
+ (void)ioctl(0, TIOCLSET, &ioctlval);
+ (void)ioctl(0, TIOCNXCL, 0);
+ (void)fcntl(0, F_SETFL, ioctlval);
+ (void)ioctl(0, TIOCGETP, &sgttyb);
+
/*
- * If talking to an rlogin process,
- * propagate the terminal type and
+ * 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, <c);
- ioctl(0, TIOCSETC, &tc);
- ioctl(0, TIOCSETP, &ttyb);
- for (t = getdtablesize(); t > 2; t--)
- close(t);
+ doremoteterm(&sgttyb);
+ sgttyb.sg_erase = CERASE;
+ sgttyb.sg_kill = CKILL;
+ (void)ioctl(0, TIOCSLTC, <c);
+ (void)ioctl(0, TIOCSETC, &tc);
+ (void)ioctl(0, TIOCSETP, &sgttyb);
+
+ for (cnt = getdtablesize(); cnt > 2; cnt--)
+ close(cnt);
+
ttyn = ttyname(0);
- if (ttyn == (char *)0 || *ttyn == '\0')
- ttyn = "/dev/tty??";
- tty = rindex(ttyn, '/');
- if (tty == NULL)
- tty = ttyn;
+ if (ttyn == NULL || *ttyn == '\0') {
+ (void)sprintf(tname, "%s??", _PATH_TTY);
+ ttyn = tname;
+ }
+ if (tty = rindex(ttyn, '/'))
+ ++tty;
else
- tty++;
+ tty = ttyn;
+
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();
- if (uid != 0 && uid != pwd->pw_uid)
- fflag = 0;
- /*
- * Disallow automatic login for root.
- */
- if (pwd->pw_uid == 0)
- fflag = 0;
+ for (cnt = 0;; ask = 1) {
+ ioctlval = 0;
+ (void)ioctl(0, TIOCSETD, &ioctlval);
+
+ if (ask) {
+ fflag = 0;
+ getloginname();
}
/*
- * 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 (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 (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 disabled logins */
+ if (pwd == NULL || pwd->pw_uid)
+ checknologin();
+
/*
- * If user not super-user, check for logins disabled.
+ * Disallow automatic login to root; if not invoked by
+ * root, disallow if the uid's differ.
*/
- if (pwd->pw_uid != 0 && (nlfd = fopen(nolog, "r")) > 0) {
- while ((c = getc(nlfd)) != EOF)
- putchar(c);
- fflush(stdout);
- sleep(5);
- exit(0);
+ if (fflag && pwd) {
+ int uid = getuid();
+
+ passwd_req = pwd->pw_uid == 0 ||
+ (uid && uid != pwd->pw_uid);
}
+
/*
- * If valid so far and root is logging in,
- * see if root logins on this terminal are permitted.
+ * If no pre-authentication and a password exists
+ * for this user, prompt for one and verify it.
*/
- 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");
- if (++t >= 5) {
- if (utmp.ut_host[0])
- syslog(LOG_ERR,
- "REPEATED LOGIN FAILURES ON %s FROM %.*s, %.*s",
- tty, HMAX, utmp.ut_host,
- NMAX, utmp.ut_name);
- else
- syslog(LOG_ERR,
- "REPEATED LOGIN FAILURES ON %s, %.*s",
- tty, NMAX, utmp.ut_name);
- ioctl(0, TIOCHPCL, (struct sgttyb *) 0);
- close(0), close(1), close(2);
- sleep(10);
- exit(1);
+ if (!passwd_req || (pwd && !*pwd->pw_passwd))
+ break;
+
+ setpriority(PRIO_PROCESS, 0, -4);
+ pp = getpass("Password:");
+ p = crypt(pp, salt);
+ setpriority(PRIO_PROCESS, 0, 0);
+
+ (void) bzero(pp, strlen(pp));
+ if (pwd && !strcmp(p, pwd->pw_passwd))
+ 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);
+ (void)ioctl(0, TIOCHPCL, (struct sgttyb *)NULL);
+ sleepexit(1);
}
+ sleep((u_int)((cnt - 3) * 5));
}
- 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 = "/";
- }
- }
- /*
- * 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);
+ }
- 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");
+ /* committed to login -- turn off timeout */
+ (void)alarm((u_int)0);
+
+ /* paranoia... */
+ endpwent();
+
+ /*
+ * If valid so far and root is logging in, see if root logins on
+ * this terminal are permitted.
+ */
+ if (pwd->pw_uid == 0 && !rootterm(tty)) {
+ if (hostname)
+ syslog(LOG_NOTICE, "ROOT LOGIN REFUSED FROM %s",
+ hostname);
else
- perror("quota (Q_SETUID)");
- sleep(5);
- exit(0);
+ syslog(LOG_NOTICE, "ROOT LOGIN REFUSED ON %s", tty);
+ (void)printf("Login incorrect\n");
+ sleepexit(1);
}
- time(&utmp.ut_time);
- t = ttyslot();
- if (t > 0 && (f = open("/etc/utmp", O_WRONLY)) >= 0) {
- lseek(f, (long)(t*sizeof(utmp)), 0);
- SCPYN(utmp.ut_line, tty);
- write(f, (char *)&utmp, sizeof(utmp));
- close(f);
+
+ if (quota(Q_SETUID, pwd->pw_uid, 0, 0) < 0 && errno != EINVAL) {
+ switch(errno) {
+ case EUSERS:
+ (void)fprintf(stderr,
+ "Too many users logged on already.\nTry again later.\n");
+ break;
+ case EPROCLIM:
+ (void)fprintf(stderr,
+ "You have too many processes running.\n");
+ break;
+ default:
+ perror("quota (Q_SETUID)");
+ }
+ sleepexit(0);
}
- if ((f = open("/usr/adm/wtmp", O_WRONLY|O_APPEND)) >= 0) {
- write(f, (char *)&utmp, sizeof(utmp));
- close(f);
+
+ if (chdir(pwd->pw_dir) < 0) {
+ (void)printf("No directory %s!\n", pwd->pw_dir);
+ if (chdir("/"))
+ exit(0);
+ pwd->pw_dir = "/";
+ (void)printf("Logging in with home = \"/\".\n");
}
- 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);
+
+#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) {
+ (void)printf("Sorry -- your password has expired.\n");
+ sleepexit(1);
+ }
+ else if (tp.tv_sec - pwd->pw_change < TWOWEEKS && !quietlog) {
+ ttp = localtime(&pwd->pw_change);
+ (void)printf("Warning: your password expires on %s %d, %d\n",
+ months[ttp->tm_mon], ttp->tm_mday, TM_YEAR_BASE + ttp->tm_year);
+ }
+ if (pwd->pw_expire)
+ if (tp.tv_sec >= pwd->pw_expire) {
+ (void)printf("Sorry -- your account has expired.\n");
+ sleepexit(1);
}
- 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);
+ else if (tp.tv_sec - pwd->pw_expire < TWOWEEKS && !quietlog) {
+ ttp = localtime(&pwd->pw_expire);
+ (void)printf("Warning: your account expires on %s %d, %d\n",
+ months[ttp->tm_mon], ttp->tm_mday, TM_YEAR_BASE + ttp->tm_year);
+ }
+
+ /* 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));
+ 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, TTYGID(pwd->pw_gid));
- if (!hflag && !rflag) /* XXX */
- ioctl(0, TIOCSWINSZ, &win);
- chmod(ttyn, 0620);
- setgid(pwd->pw_gid);
- strncpy(name, utmp.ut_name, NMAX);
- name[NMAX] = '\0';
- initgroups(name, pwd->pw_gid);
+
+ dolastlog(quietlog);
+
+ if (!hflag && !rflag) { /* XXX */
+ static struct winsize win = { 0, 0, 0, 0 };
+
+ (void)ioctl(0, TIOCSWINSZ, &win);
+ }
+
+ (void)chown(ttyn, pwd->pw_uid,
+ (gr = getgrnam(TTYGRPNAME)) ? gr->gr_gid : pwd->pw_gid);
+ (void)chmod(ttyn, 0620);
+ (void)setgid(pwd->pw_gid);
+
+ initgroups(username, pwd->pw_gid);
+
quota(Q_DOWARN, pwd->pw_uid, (dev_t)-1, 0);
- setuid(pwd->pw_uid);
- /* destroy environment unless user has asked to preserve it */
+ if (*pwd->pw_shell == '\0')
+ pwd->pw_shell = _PATH_BSHELL;
+ /* turn on new line discipline for the csh */
+ else if (!strcmp(pwd->pw_shell, _PATH_CSHELL)) {
+ ioctlval = NTTYDISC;
+ (void)ioctl(0, TIOCSETD, &ioctlval);
+ }
+
+ /* destroy environment unless user has requested preservation */
if (!pflag)
environ = envinit;
- setenv("HOME", pwd->pw_dir, 1);
- setenv("SHELL", pwd->pw_shell, 1);
+ (void)setenv("HOME", pwd->pw_dir, 1);
+ (void)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);
+ (void)setenv("TERM", term, 0);
+ (void)setenv("USER", pwd->pw_name, 1);
+ (void)setenv("PATH", _PATH_DEFPATH, 0);
- if ((namep = rindex(pwd->pw_shell, '/')) == NULL)
- namep = pwd->pw_shell;
- else
- namep++;
- strcat(minusnam, namep);
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);
+ if (hostname)
+ syslog(LOG_NOTICE, "ROOT LOGIN ON %s FROM %s",
+ tty, hostname);
else
- syslog(LOG_NOTICE, "ROOT LOGIN %s", tty);
+ syslog(LOG_NOTICE, "ROOT LOGIN ON %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 " : "");
+ 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");
+
+ (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 (setlogname(pwd->pw_name, strlen(pwd->pw_name)) < 0)
+ syslog(LOG_ERR, "setlogname() failure: %m");
+
+ /* discard permissions last so can't get killed and drop core */
+ (void)setuid(pwd->pw_uid);
+
+ execlp(pwd->pw_shell, tbuf, 0);
+ (void)fprintf(stderr, "login: no shell: %s.\n", strerror(errno));
exit(0);
}
-getloginname(up)
- register struct utmp *up;
+getloginname()
{
- 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)
+ register int ch;
+ register char *p;
+ static char nbuf[UT_NAMESIZE + 1];
+
+ 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 + UT_NAMESIZE)
+ *p++ = ch;
}
+ if (p > nbuf)
+ if (nbuf[0] == '-')
+ (void)fprintf(stderr,
+ "login names may not start with '-'.\n");
+ else {
+ *p = '\0';
+ username = nbuf;
+ break;
+ }
}
- 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);
+ (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 struct ttyent *t;
+ register int fd, nchars;
+ int (*oldint)(), 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);
+}
- if ((t = getttynam(tty)) != NULL) {
- if (t->ty_status & TTY_SECURE)
- return (1);
+sigint()
+{
+ longjmp(motdinterrupt, 1);
+}
+
+checknologin()
+{
+ 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);
}
- return (0);
}
-showmotd()
+dolastlog(quiet)
+ int quiet;
{
- 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);
+ struct lastlog ll;
+ int fd;
+ char *ctime();
+ 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((char *)&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);
}
- signal(SIGINT, SIG_IGN);
+}
+
+badlogin(name)
+ char *name;
+{
+ if (failures == 0)
+ return;
+ if (hostname)
+ syslog(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, %s",
+ failures, failures > 1 ? "S" : "", tty, name);
}
#undef UNKNOWN
-#define UNKNOWN "su"
+#define UNKNOWN "su"
char *
stypeof(ttyid)
char *ttyid;
{
- register struct ttyent *t;
+ struct ttyent *t;
- if (ttyid == NULL || (t = getttynam(ttyid)) == NULL)
- return (UNKNOWN);
- 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));
+ return(ttyid && (t = getttynam(ttyid)) ? t->ty_type : UNKNOWN);
}
getstr(buf, cnt, err)
- char *buf;
+ char *buf, *err;
int cnt;
- char *err;
{
- char c;
+ char ch;
do {
- if (read(0, &c, 1) != 1)
+ if (read(0, &ch, sizeof(ch)) != sizeof(ch))
exit(1);
if (--cnt < 0) {
- printf("%s too long\r\n", err);
- exit(1);
+ (void)fprintf(stderr, "%s too long\r\n", err);
+ sleepexit(1);
}
- *buf++ = c;
- } while (c != 0);
+ *buf++ = ch;
+ } while (ch);
}
-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]))
+sleepexit(eval)
+ int eval;
+{
+ sleep((u_int)5);
+ exit(eval);
+}
+
+doremotelogin(host)
+ char *host;
+{
+ static char lusername[UT_NAMESIZE+1];
+ char rusername[UT_NAMESIZE+1];
+
+ getstr(rusername, sizeof(rusername), "remuser");
+ getstr(lusername, sizeof(lusername), "locuser");
+ getstr(term, sizeof(term), "Terminal type");
+ username = lusername;
+ pwd = getpwnam(username);
+ if (pwd == NULL)
+ return(-1);
+ return(ruserok(host, (pwd->pw_uid == 0), rusername, username));
+}
+
+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;
+doremoteterm(tp)
struct sgttyb *tp;
{
register char *cp = index(term, '/'), **cpp;
}
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);
-}