X-Git-Url: https://git.subgeniuskitty.com/unix-history/.git/blobdiff_plain/f0c0c252f249335a59a5fe47fe1a866455c7ec97..011f52c6d88e4f7052c732ac4afa9bfe9c56c0a9:/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 2072073d90..371446fda1 100644 --- a/usr/src/usr.bin/login/login.c +++ b/usr/src/usr.bin/login/login.c @@ -1,237 +1,309 @@ -/* - * Copyright (c) 1980, 1987, 1988 The Regents of the University of California. - * All rights reserved. +/*- + * Copyright (c) 1980, 1987, 1988, 1991, 1993, 1994 + * 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. + * %sccs.include.redist.c% */ #ifndef lint -char copyright[] = -"@(#) Copyright (c) 1980, 1987, 1988 The Regents of the University of California.\n\ - All rights reserved.\n"; +static char copyright[] = +"@(#) Copyright (c) 1980, 1987, 1988, 1991, 1993, 1994\n\ + The Regents of the University of California. All rights reserved.\n"; #endif /* not lint */ #ifndef lint -static char sccsid[] = "@(#)login.c 5.27 (Berkeley) %G%"; +static char sccsid[] = "@(#)login.c 8.4 (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 -#include #include #include #include #include -#include -#include -#include -#include +#include #include -#include -#include #include #include #include +#include #include -#include +#include +#include +#include +#include +#include +#include +#include -#define TTYGRPNAME "tty" /* name of group to own ttys */ +#include "pathnames.h" + +void badlogin __P((char *)); +void checknologin __P((void)); +void dolastlog __P((int)); +void getloginname __P((void)); +void motd __P((void)); +int rootterm __P((char *)); +void sigint __P((int)); +void sleepexit __P((int)); +char *stypeof __P((char *)); +void timedout __P((int)); +#ifdef KERBEROS +int klogin __P((struct passwd *, char *, char *, char *)); +#endif -#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" +extern void login __P((struct utmp *)); + +#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; +u_int timeout = 300; -struct passwd *pwd; -int repeatcnt; -char term[64], *hostname, *username, *tty; +#ifdef KERBEROS +int notickets = 1; +char *instance; +char *krbtkfile_env; +int authok; +#endif -struct sgttyb sgttyb; -struct tchars tc = { - CINTR, CQUIT, CSTART, CSTOP, CEOT, CBRK -}; -struct ltchars ltc = { - CSUSP, CDSUSP, CRPRNT, CFLUSH, CWERASE, CLNEXT -}; +struct passwd *pwd; +int failures; +char term[64], *envinit[1], *hostname, *username, *tty; + +int +char *months[] = + { "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", + "Sep", "Oct", "Nov", "Dec" }; main(argc, argv) int argc; - char **argv; + char *argv[]; { - extern int errno, optind; - extern char *optarg, **environ; + extern char **environ; 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 tbuf[MAXPATHLEN + 2]; - char *ttyname(), *stypeof(), *crypt(), *getpass(); - time_t time(); - off_t lseek(); + struct stat st; + struct timeval tp; + struct utmp utmp; + int ask, ch, cnt, fflag, hflag, pflag, quietlog, rootlogin, rval; + uid_t uid; + char *domain, *p, *salt, *ttyn; + char tbuf[MAXPATHLEN + 2], tname[sizeof(_PATH_TTY) + 10]; + char localhost[MAXHOSTNAMELEN]; (void)signal(SIGALRM, timedout); - (void)alarm((u_int)timeout); + (void)alarm(timeout); (void)signal(SIGQUIT, SIG_IGN); (void)signal(SIGINT, SIG_IGN); (void)setpriority(PRIO_PROCESS, 0, 0); - (void)quota(Q_SETUID, 0, 0, 0); + + openlog("login", LOG_ODELAY, LOG_AUTH); /* * -p is used by getty to tell login not to destroy the environment - * -f is used to skip a second login authentication + * -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 */ - (void)gethostname(tbuf, sizeof(tbuf)); - domain = index(tbuf, '.'); + domain = NULL; + if (gethostname(localhost, sizeof(localhost)) < 0) + syslog(LOG_ERR, "couldn't get local hostname: %m"); + else + domain = strchr(localhost, '.'); - fflag = hflag = pflag = 0; - passwd_req = 1; - while ((ch = getopt(argc, argv, "fh:p")) != EOF) + fflag = hflag = pflag = rflag = 0; + uid = getuid(); + 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()) { + if (uid) + errx(1, "-h option: %s", strerror(EPERM)); + if (rflag) { fprintf(stderr, - "login: -h for super-user only.\n"); + "login: only one of -r and -h allowed.\n"); exit(1); } hflag = 1; - if (domain && (p = index(optarg, '.')) && - strcmp(p, domain) == 0) + if (domain && (p = strchr(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: - fprintf(stderr, "usage: login [-fp] [username]\n"); + if (!uid) + syslog(LOG_ERR, "invalid flag %c", ch); + (void)fprintf(stderr, + "usage: login [-fp] [-h hostname] [username]\n"); exit(1); } argc -= optind; argv += optind; + if (*argv) { - ask = 0; username = *argv; - } - else + ask = 0; + } else ask = 1; - - ioctlval = 0; - (void)ioctl(0, TIOCLSET, &ioctlval); - (void)ioctl(0, TIOCNXCL, 0); - (void)fcntl(0, F_SETFL, ioctlval); - (void)ioctl(0, TIOCGETP, &sgttyb); - sgttyb.sg_erase = CERASE; - sgttyb.sg_kill = CKILL; - (void)ioctl(0, TIOCSLTC, <c); - (void)ioctl(0, TIOCSETC, &tc); - (void)ioctl(0, TIOCSETP, &sgttyb); + if (rflag) + ask = 0; for (cnt = getdtablesize(); cnt > 2; cnt--) - close(cnt); + (void)close(cnt); - ttyn = ttyname(0); - if (ttyn == NULL || *ttyn == '\0') - ttyn = "/dev/tty??"; - if (tty = rindex(ttyn, '/')) + ttyn = ttyname(STDIN_FILENO); + if (ttyn == NULL || *ttyn == '\0') { + (void)snprintf(tname, sizeof(tname), "%s??", _PATH_TTY); + ttyn = tname; + } + if (tty = strrchr(ttyn, '/')) ++tty; else tty = ttyn; - openlog("login", LOG_ODELAY, LOG_AUTH); - for (cnt = 0;; ask = 1) { - ioctlval = 0; - (void)ioctl(0, TIOCSETD, &ioctlval); - if (ask) { fflag = 0; getloginname(); } - /* note if trying multiple login's */ - if (repeatcnt) { - if (strcmp(tbuf, username)) { + rootlogin = 0; +#ifdef KERBEROS + if ((instance = strchr(username, '.')) != NULL) { + if (strncmp(instance, ".root", 5) == 0) + rootlogin = 1; + *instance++ = '\0'; + } else + instance = ""; +#endif + if (strlen(username) > UT_NAMESIZE) + username[UT_NAMESIZE] = '\0'; + + /* + * Note if trying multiple user names; log failures for + * previous user name, but don't bother logging one failure + * for nonexistent name (mistyped username). + */ + if (failures && strcmp(tbuf, username)) { + if (failures > (pwd ? 0 : 1)) badlogin(tbuf); - 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 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 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 (fflag && pwd) { - int uid = getuid(); - - passwd_req = pwd->pw_uid == 0 || - (uid && uid != pwd->pw_uid); + 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 && rootlogin && pwd->pw_uid != 0) + rootlogin = 0; + if (rval == 0) + authok = 1; + else if (rval == 1) + rval = strcmp(crypt(p, salt), pwd->pw_passwd); +#else + rval = strcmp(crypt(p, salt), pwd->pw_passwd); +#endif } + memset(p, 0, strlen(p)); + + (void)setpriority(PRIO_PROCESS, 0, 0); /* - * If no pre-authentication and a password exists - * for this user, prompt for one and verify it. + * If trying to log in as root without Kerberos, + * but with insecure terminal, refuse the login attempt. */ - if (!passwd_req || pwd && !*pwd->pw_passwd) - break; +#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; + } - setpriority(PRIO_PROCESS, 0, -4); - p = crypt(getpass("Password:"), salt); - setpriority(PRIO_PROCESS, 0, 0); - if (pwd && !strcmp(p, pwd->pw_passwd)) + if (pwd && !rval) break; - printf("Login incorrect\n"); + (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)); @@ -241,113 +313,124 @@ main(argc, argv) /* 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 (pwd->pw_uid == 0 && !rootterm()) { - if (hostname) - syslog(LOG_ERR, "ROOT LOGIN REFUSED ON %s FROM %s", - tty, hostname); - else - syslog(LOG_ERR, "ROOT LOGIN REFUSED ON %s", tty); - printf("Login incorrect\n"); - sleepexit(1); - } + endpwent(); - if (quota(Q_SETUID, pwd->pw_uid, 0, 0) < 0 && errno != EINVAL) { - switch(errno) { - case EUSERS: - fprintf(stderr, - "Too many users logged on already.\nTry again later.\n"); - break; - case EPROCLIM: - fprintf(stderr, - "You have too many processes running.\n"); - break; - default: - perror("quota (Q_SETUID)"); - } - sleepexit(0); - } + /* if user not super-user, check for disabled logins */ + if (!rootlogin) + checknologin(); if (chdir(pwd->pw_dir) < 0) { - printf("No directory %s!\n", pwd->pw_dir); + (void)printf("No home directory %s!\n", pwd->pw_dir); if (chdir("/")) exit(0); pwd->pw_dir = "/"; - printf("Logging in with home = \"/\".\n"); + (void)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); + } - /* nothing else left to fail -- really log in */ - { - struct utmp utmp; - - (void)time(&utmp.ut_time); - strncpy(utmp.ut_name, username, sizeof(utmp.ut_name)); - strncpy(utmp.ut_host, hostname, sizeof(utmp.ut_host)); - strncpy(utmp.ut_line, tty, sizeof(utmp.ut_line)); - login(&utmp); - } + 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_change)); + 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. */ + memset((void *)&utmp, 0, sizeof(utmp)); + (void)time(&utmp.ut_time); + (void)strncpy(utmp.ut_name, username, sizeof(utmp.ut_name)); + if (hostname) + (void)strncpy(utmp.ut_host, hostname, sizeof(utmp.ut_host)); + (void)strncpy(utmp.ut_line, tty, sizeof(utmp.ut_line)); + login(&utmp); - quietlog = access(HUSHLOGIN, F_OK) == 0; dolastlog(quietlog); - if (!hflag) { /* 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); - (void)setuid(pwd->pw_uid); - if (*pwd->pw_shell == '\0') - pwd->pw_shell = BSHELL; - /* turn on new line discipline for the csh */ - else if (!strcmp(pwd->pw_shell, "/bin/csh")) { - ioctlval = NTTYDISC; - (void)ioctl(0, TIOCSETD, &ioctlval); - } + pwd->pw_shell = _PATH_BSHELL; - /* destroy environment unless user has requested preservation */ + /* Destroy environment unless user has requested its 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(), sizeof(term)); + (void)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", "/usr/ucb:/bin:/usr/bin:", 0); + (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 (pwd->pw_uid == 0) + + /* If fflag is on, assume caller/authenticator has logged root login. */ + if (rootlogin && fflag == 0) if (hostname) - syslog(LOG_NOTICE, "ROOT LOGIN %s FROM %s", - tty, hostname); + syslog(LOG_NOTICE, "ROOT LOGIN (%s) ON %s FROM %s", + username, tty, hostname); else - syslog(LOG_NOTICE, "ROOT LOGIN %s", tty); + syslog(LOG_NOTICE, "ROOT LOGIN (%s) ON %s", username, tty); - if (!quietlog) { - struct stat st; +#ifdef KERBEROS + if (!quietlog && notickets == 1) + (void)printf("Warning: no Kerberos tickets issued.\n"); +#endif + if (!quietlog) { + (void)printf("%s\n\t%s %s\n\n", + "Copyright (c) 1980, 1983, 1986, 1988, 1990, 1991, 1993, 1994", + "The Regents of the University of California. ", + "All rights reserved."); motd(); - (void)sprintf(tbuf, "%s/%s", MAILDIR, pwd->pw_name); + (void)snprintf(tbuf, + sizeof(tbuf), "%s/%s", _PATH_MAILDIR, pwd->pw_name); if (stat(tbuf, &st) == 0 && st.st_size != 0) - printf("You have %smail.\n", + (void)printf("You have %smail.\n", (st.st_mtime > st.st_atime) ? "new " : ""); } @@ -357,33 +440,48 @@ main(argc, argv) (void)signal(SIGTSTP, SIG_IGN); tbuf[0] = '-'; - strcpy(tbuf + 1, (p = rindex(pwd->pw_shell, '/')) ? + (void)strcpy(tbuf + 1, (p = strrchr(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); - fprintf(stderr, "login: no shell: "); - perror(pwd->pw_shell); - exit(0); + err(1, "%s", pwd->pw_shell); } +#ifdef KERBEROS +#define NBUFSIZ (UT_NAMESIZE + 1 + 5) /* .root suffix */ +#else +#define NBUFSIZ (UT_NAMESIZE + 1) +#endif + +void getloginname() { - register int ch; - register char *p; - static char nbuf[UT_NAMESIZE + 1]; + int ch; + char *p; + static char nbuf[NBUFSIZ]; for (;;) { - printf("login: "); + (void)printf("login: "); for (p = nbuf; (ch = getchar()) != '\n'; ) { if (ch == EOF) { badlogin(username); exit(0); } - if (p < nbuf + UT_NAMESIZE) + if (p < nbuf + (NBUFSIZ - 1)) *p++ = ch; } if (p > nbuf) if (nbuf[0] == '-') - fprintf(stderr, + (void)fprintf(stderr, "login names may not start with '-'.\n"); else { *p = '\0'; @@ -393,28 +491,25 @@ getloginname() } } -timedout() -{ - fprintf(stderr, "Login timed out after %d seconds\n", timeout); - exit(0); -} - -rootterm() +int +rootterm(ttyn) + char *ttyn; { struct ttyent *t; - return((t = getttynam(tty)) && t->ty_status&TTY_SECURE); + return ((t = getttynam(ttyn)) && t->ty_status & TTY_SECURE); } jmp_buf motdinterrupt; +void motd() { - register int fd, nchars; - int (*oldint)(), sigint(); + int fd, nchars; + sig_t oldint; 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) @@ -424,97 +519,156 @@ motd() (void)close(fd); } -sigint() +/* ARGSUSED */ +void +sigint(signo) + int signo; { + longjmp(motdinterrupt, 1); } +/* ARGSUSED */ +void +timedout(signo) + int signo; +{ + + (void)fprintf(stderr, "Login timed out after %d seconds\n", timeout); + exit(0); +} + +void checknologin() { - register int fd, nchars; + 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); } } +void dolastlog(quiet) int quiet; { struct lastlog ll; int fd; + 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) && ll.ll_time != 0) { - printf("Last login: %.*s ", + (void)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); + (void)printf("from %.*s\n", + (int)sizeof(ll.ll_host), + ll.ll_host); else - printf("on %.*s\n", - sizeof(ll.ll_line), ll.ll_line); + (void)printf("on %.*s\n", + (int)sizeof(ll.ll_line), + ll.ll_line); } (void)lseek(fd, (off_t)pwd->pw_uid * sizeof(ll), L_SET); } + memset((void *)&ll, 0, sizeof(ll)); (void)time(&ll.ll_time); - strncpy(ll.ll_line, tty, sizeof(ll.ll_line)); - strncpy(ll.ll_host, hostname, sizeof(ll.ll_host)); + (void)strncpy(ll.ll_line, tty, sizeof(ll.ll_line)); + if (hostname) + (void)strncpy(ll.ll_host, hostname, sizeof(ll.ll_host)); (void)write(fd, (char *)&ll, sizeof(ll)); (void)close(fd); } } +void badlogin(name) char *name; { - if (!repeatcnt) + + if (failures == 0) return; - if (hostname) - syslog(LOG_ERR, "%d LOGIN FAILURE%s ON %s FROM %s, %s", - repeatcnt, repeatcnt > 1 ? "S" : "", tty, hostname, name); - else - syslog(LOG_ERR, "%d LOGIN FAILURE%s ON %s, %s", - repeatcnt, repeatcnt > 1 ? "S" : "", tty, name); + 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); + } } #undef UNKNOWN #define UNKNOWN "su" char * -stypeof() +stypeof(ttyid) + char *ttyid; { 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) - char *buf, *err; - int cnt; +void +sleepexit(eval) + int eval; { - char ch; - do { - if (read(0, &ch, sizeof(ch)) != sizeof(ch)) - exit(1); - if (--cnt < 0) { - fprintf(stderr, "%s too long\r\n", err); - sleepexit(1); - } - *buf++ = ch; - } while (ch); + (void)sleep(5); + exit(eval); } -sleepexit(eval) - int eval; +doremotelogin(host) + char *host; { - sleep((u_int)5); - exit(eval); + 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; + } + } + tp->sg_flags = ECHO|CRMOD|ANYP|XTABS; }