-static char *sccsid = "@(#)login.c 4.2 (Berkeley) %G%";
+/*
+ * 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, 1987, 1988 The Regents of the University of California.\n\
+ All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+static char sccsid[] = "@(#)login.c 5.44 (Berkeley) %G%";
+#endif /* not lint */
+
/*
* login [ name ]
+ * login -r hostname (for rlogind)
+ * login -h hostname (for telnetd, etc.)
+ * login -f name (for pre-authenticated login: datakit, xterm, etc.)
*/
-#include <sys/types.h>
-#include <sgtty.h>
+#include <sys/param.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 <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 <sys/stat.h>
-#include <lastlog.h>
-#define SCPYN(a, b) strncpy(a, b, sizeof(a))
-
-#define NMAX sizeof(utmp.ut_name)
-#define LMAX sizeof(utmp.ut_line)
-
-char user[20];
-char maildir[30] = "/usr/spool/mail/";
-char lastlog[] = "/usr/adm/lastlog";
-struct passwd nouser = {"", "nope"};
-struct sgttyb ttyb;
-struct utmp utmp;
-char minusnam[16] = "-";
-char homedir[64] = "HOME=";
-char shell[64] = "SHELL=";
-char term[64] = "TERM=";
-char *envinit[] = {homedir, shell, "PATH=:/usr/ucb:/bin:/usr/bin", term, user,0};
+#include <strings.h>
+#include <tzfile.h>
+#include "pathnames.h"
+
+#define TTYGRPNAME "tty" /* name of group to own ttys */
+
+/*
+ * 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 failures;
+char term[64], *hostname, *username, *tty;
-struct passwd *getpwnam();
-char *strcat();
-int setpwent();
-char *ttyname();
-char *crypt();
-char *getpass();
-char *rindex();
-char *stypeof();
-extern char **environ;
-
-#define CTRL(c) ('c'&037)
-#define CERASE '#'
-#define CEOT CTRL(d)
-#define CKILL '@'
-#define CQUIT 034 /* FS, cntl shift L */
-#define CINTR 0177 /* DEL */
-#define CSTOP CTRL(s)
-#define CSTART CTRL(q)
-#define CBRK 0377
+struct sgttyb sgttyb;
struct tchars tc = {
CINTR, CQUIT, CSTART, CSTOP, CEOT, CBRK
};
struct ltchars ltc = {
- CTRL(z), CTRL(y), CTRL(r), CTRL(o), CTRL(w), CTRL(v), CTRL(h), CTRL(u),
- CTRL(c)
+ 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)
-char **argv;
+ int argc;
+ char **argv;
{
- register char *namep;
- int t, f, c;
- char *ttyn;
- int ldisc = 0;
-
- alarm(60);
- signal(SIGQUIT, SIG_IGN);
- signal(SIGINT, SIG_IGN);
- nice(-100);
- nice(20);
- nice(0);
- ioctl(0, TIOCSETD, &ldisc);
- ioctl(0, TIOCLSET, 0);
- gtty(0, &ttyb);
- ttyb.sg_erase = '#';
- ttyb.sg_kill = '@';
- stty(0, &ttyb);
- ioctl(0, TIOCSETC, &tc);
- ioctl(0, TIOCSLTC, <c);
- for (t=3; t<20; t++)
- close(t);
+ 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
+ */
+ 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);
+ }
+ fflag = 1;
+ break;
+ case 'h':
+ if (getuid()) {
+ (void)fprintf(stderr,
+ "login: -h for super-user only.\n");
+ exit(1);
+ }
+ if (rflag) {
+ fprintf(stderr,
+ "login: only one of -r and -h allowed.\n");
+ exit(1);
+ }
+ hflag = 1;
+ if (domain && (p = index(optarg, '.')) &&
+ strcasecmp(p, domain) == 0)
+ *p = 0;
+ hostname = optarg;
+ break;
+ case 'p':
+ pflag = 1;
+ 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:
+ syslog(LOG_ERR, "invalid flag");
+ (void)fprintf(stderr,
+ "usage: login [-fp] [username]\n");
+ exit(1);
+ }
+ 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
+ * baud rate across the network.
+ */
+ if (rflag)
+ 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==0)
- ttyn = "/dev/tty??";
-
- loop:
- 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;
}
- while (utmp.ut_name[0] == '\0') {
- namep = utmp.ut_name;
- printf("login: ");
- while ((c = getchar()) != '\n') {
- if(c == ' ')
- c = '_';
- if (c == EOF)
- exit(0);
- if (namep < utmp.ut_name+NMAX)
- *namep++ = c;
+ if (tty = rindex(ttyn, '/'))
+ ++tty;
+ else
+ tty = ttyn;
+
+ openlog("login", LOG_ODELAY, LOG_AUTH);
+
+ for (cnt = 0;; ask = 1) {
+ ioctlval = TTYDISC;
+ (void)ioctl(0, TIOCSETD, &ioctlval);
+
+ if (ask) {
+ fflag = 0;
+ getloginname();
}
- }
- setpwent();
- if ((pwd = getpwnam(utmp.ut_name)) == NULL)
- pwd = &nouser;
- endpwent();
- if (*pwd->pw_passwd != '\0') {
- namep = crypt(getpass("Password:"),pwd->pw_passwd);
- if (strcmp(namep, pwd->pw_passwd)) {
-bad:
- printf("Login incorrect\n");
- if (ttyn[LMAX] == 'd') {
- FILE *console = fopen("/dev/console", "w");
- if (console != NULL) {
- fprintf(console, "\r\nBADDIALUP %s %s\r\n", ttyn+5, utmp.ut_name);
- fclose(console);
- }
+ /*
+ * 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;
+ }
+ (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();
+
+ /*
+ * Disallow automatic login to root; if not invoked by
+ * root, disallow if the uid's differ.
+ */
+ if (fflag && pwd) {
+ int uid = getuid();
+
+ passwd_req =
+#ifndef KERBEROS
+ pwd->pw_uid == 0 ||
+#endif
+ (uid && uid != pwd->pw_uid);
+ }
+
+ /*
+ * If no pre-authentication and a password exists
+ * for this user, prompt for one and verify it.
+ */
+ 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);
}
- goto loop;
+ sleep((u_int)((cnt - 3) * 5));
}
}
- sprintf(user, "USER=%.*s", NMAX, pwd->pw_name);
- if (pwd->pw_uid == 0 && ttyn[5] != 'c')
- goto bad;
- if (ttyn[LMAX] == 'd') {
- FILE *console = fopen("/dev/console", "w");
- if (console != NULL) {
- fprintf(console, "\r\nDIALUP %s %s\r\n", ttyn+5, pwd->pw_name);
- fclose(console);
- }
+
+ /* 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
+ syslog(LOG_NOTICE, "ROOT LOGIN REFUSED ON %s", tty);
+ (void)printf("Login incorrect\n");
+ sleepexit(1);
}
- if((f = open(lastlog, 2)) >= 0) {
- struct lastlog ll;
-
- lseek(f, pwd->pw_uid * sizeof (struct lastlog), 0);
- if (read(f, (char *) &ll, sizeof ll) == sizeof ll && ll.ll_time != 0) {
- register char *ep = (char *) ctime(&ll.ll_time);
- printf("Last login: ");
- ep[24 - 5] = 0;
- printf("%s on %.*s\n", ep, LMAX, ll.ll_line);
+
+ 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)");
}
- lseek(f, pwd->pw_uid * sizeof (struct lastlog), 0);
- time(&ll.ll_time);
- strcpyn(ll.ll_line, ttyn+5, LMAX);
- write(f, (char *) &ll, sizeof ll);
- close(f);
+ sleepexit(0);
}
- if(chdir(pwd->pw_dir) < 0) {
- printf("No directory\n");
- goto loop;
+
+ 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");
}
- 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 BSD > 43
+#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);
+ }
+
+ 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) {
+ 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);
+ }
+ else if (pwd->pw_expire - tp.tv_sec <
+ 2 * DAYSPERWEEK * SECSPERDAY && !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);
+ }
+#endif
+
+ /* 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);
}
- if (t>0 && (f = open("/usr/adm/wtmp", 1)) >= 0) {
- lseek(f, 0L, 2);
- write(f, (char *)&utmp, sizeof(utmp));
- close(f);
+
+ dolastlog(quietlog);
+
+ if (!hflag && !rflag) { /* XXX */
+ static struct winsize win = { 0, 0, 0, 0 };
+
+ (void)ioctl(0, TIOCSWINSZ, &win);
}
- chown(ttyn, pwd->pw_uid, pwd->pw_gid);
- setgid(pwd->pw_gid);
- setuid(pwd->pw_uid);
+
+ (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);
+
if (*pwd->pw_shell == '\0')
- pwd->pw_shell = "/bin/sh";
- environ = envinit;
- strncat(homedir, pwd->pw_dir, sizeof(homedir)-6);
- strncat(shell, pwd->pw_shell, sizeof(shell)-7);
- strncat(term, stypeof(ttyn), sizeof(term)-6);
- if ((namep = rindex(pwd->pw_shell, '/')) == NULL)
- namep = pwd->pw_shell;
- else
- namep++;
- strcat(minusnam, namep);
- alarm(0);
- umask(022);
- showmotd();
- strcat(maildir, pwd->pw_name);
- if(access(maildir,4)==0) {
- struct stat statb;
- stat(maildir, &statb);
- if (statb.st_size)
- printf("You have mail.\n");
+ 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("USER", pwd->pw_name, 1);
+ (void)setenv("PATH", _PATH_DEFPATH, 0);
+
+ if (tty[sizeof("tty")-1] == 'd')
+ syslog(LOG_INFO, "DIALUP %s, %s", tty, pwd->pw_name);
+ if (pwd->pw_uid == 0)
+ if (hostname)
+ syslog(LOG_NOTICE, "ROOT LOGIN ON %s FROM %s",
+ tty, hostname);
+ else
+ syslog(LOG_NOTICE, "ROOT LOGIN ON %s", tty);
+
+ if (!quietlog) {
+ struct stat st;
+
+ 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(SIGQUIT, SIG_DFL);
- signal(SIGINT, SIG_DFL);
- execlp(pwd->pw_shell, minusnam, 0);
- 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 BSD > 43
+ if (setlogname(pwd->pw_name, strlen(pwd->pw_name)) < 0)
+ syslog(LOG_ERR, "setlogname() failure: %m");
+#endif
+
+ /* 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);
}
-int stopmotd;
-catch()
+getloginname()
{
- signal(SIGINT, SIG_IGN);
- stopmotd++;
+ 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 (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;
+ }
+ }
}
-showmotd()
+timedout()
{
- 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);
+ (void)fprintf(stderr, "Login timed out after %d seconds\n", timeout);
+ exit(0);
+}
+
+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;
+ int 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);
+}
+
+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);
}
- signal(SIGINT, SIG_IGN);
}
-#define UNKNOWN "su"
+dolastlog(quiet)
+ int quiet;
+{
+ 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);
+ }
+}
+
+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"
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++ = 0;
- for (p=t; *p>' '; p++)
- ;
- *p = 0;
- if (strcmp(q,t)==0) {
- strcpy(typebuf, buf);
- fclose(f);
- return (typebuf);
+ struct ttyent *t;
+
+ return(ttyid && (t = getttynam(ttyid)) ? t->ty_type : UNKNOWN);
+}
+
+getstr(buf, cnt, err)
+ char *buf, *err;
+ int cnt;
+{
+ char ch;
+
+ do {
+ if (read(0, &ch, sizeof(ch)) != sizeof(ch))
+ exit(1);
+ if (--cnt < 0) {
+ (void)fprintf(stderr, "%s too long\r\n", err);
+ sleepexit(1);
}
+ *buf++ = ch;
+ } while (ch);
+}
+
+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(tp)
+ struct sgttyb *tp;
+{
+ register char *cp = index(term, '/'), **cpp;
+ char *speed;
+
+ if (cp) {
+ *cp++ = '\0';
+ speed = cp;
+ cp = index(speed, '/');
+ if (cp)
+ *cp++ = '\0';
+ for (cpp = speeds; cpp < &speeds[NSPEEDS]; cpp++)
+ if (strcmp(*cpp, speed) == 0) {
+ tp->sg_ispeed = tp->sg_ospeed = cpp-speeds;
+ break;
+ }
}
- fclose (f);
- return (UNKNOWN);
+ tp->sg_flags = ECHO|CRMOD|ANYP|XTABS;
}