2 * Copyright (c) 1980, 1987, 1993
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 static const char copyright[] =
39 "@(#) Copyright (c) 1980, 1987, 1993\n\
40 The Regents of the University of California. All rights reserved.\n";
45 static char sccsid[] = "@(#)lock.c 8.1 (Berkeley) 6/6/93";
48 #include <sys/cdefs.h>
49 __FBSDID("$FreeBSD: src/usr.bin/lock/lock.c,v 1.8.2.1 2002/09/15 22:32:56 dd Exp $");
52 * Lock a terminal up until the given key is entered or the given
55 * Timeout interval is by default TIMEOUT, it can be changed with
56 * an argument of the form -time where time is in minutes
59 #include <sys/param.h>
62 #include <sys/signal.h>
63 #include <sys/consio.h>
80 static void usage(void);
82 struct timeval timeout;
83 struct timeval zerotime;
84 struct sgttyb tty, ntty;
85 long nexttime; /* keep the timeout time */
86 int no_timeout; /* lock terminal forever */
87 int vtyunlock; /* Unlock flag and code. */
96 struct timeval timval;
98 struct itimerval ntimer, otimer;
100 int ch, failures, sectimeout, usemine, vtylock;
101 char *ap, *mypw, *ttynam, *tzn;
102 char hostname[MAXHOSTNAMELEN], s[BUFSIZ], s1[BUFSIZ];
104 openlog("lock", LOG_ODELAY, LOG_AUTH);
106 sectimeout = TIMEOUT;
111 while ((ch = getopt(argc, argv, "npt:v")) != -1)
114 if ((sectimeout = atoi(optarg)) <= 0)
115 errx(1, "illegal timeout value");
119 if (!(pw = getpwuid(getuid())))
120 errx(1, "unknown uid %d", getuid());
121 mypw = strdup(pw->pw_passwd);
133 timeout.tv_sec = sectimeout * 60;
135 setuid(getuid()); /* discard privs */
137 if (ioctl(0, TIOCGETP, &tty)) /* get information for header */
139 gethostname(hostname, sizeof(hostname));
140 if (!(ttynam = ttyname(0)))
141 errx(1, "not a terminal?");
142 if (gettimeofday(&timval, (struct timezone *)NULL))
143 err(1, "gettimeofday");
144 nexttime = timval.tv_sec + (sectimeout * 60);
145 timval_sec = timval.tv_sec;
146 timp = localtime(&timval_sec);
150 (void)signal(SIGINT, quit);
151 (void)signal(SIGQUIT, quit);
152 ntty = tty; ntty.sg_flags &= ~ECHO;
153 (void)ioctl(0, TIOCSETP, &ntty);
156 /* get key and check again */
157 (void)printf("Key: ");
158 if (!fgets(s, sizeof(s), stdin) || *s == '\n')
160 (void)printf("\nAgain: ");
162 * Don't need EOF test here, if we get EOF, then s1 != s
163 * and the right things will happen.
165 (void)fgets(s1, sizeof(s1), stdin);
168 (void)printf("\07lock: passwords didn't match.\n");
169 ioctl(0, TIOCSETP, &tty);
176 /* set signal handlers */
177 (void)signal(SIGINT, hi);
178 (void)signal(SIGQUIT, hi);
179 (void)signal(SIGTSTP, hi);
180 (void)signal(SIGALRM, bye);
182 ntimer.it_interval = zerotime;
183 ntimer.it_value = timeout;
185 setitimer(ITIMER_REAL, &ntimer, &otimer);
188 * If this failed, we want to err out; warn isn't good
189 * enough, since we don't want the user to think that
190 * everything is nice and locked because they got a
193 if (ioctl(0, VT_LOCKSWITCH, &vtylock) == -1) {
194 (void)ioctl(0, TIOCSETP, &tty);
195 err(1, "locking vty");
201 (void)printf("lock: %s on %s.", ttynam, hostname);
203 (void)printf(" no timeout.");
205 (void)printf(" timeout in %d minute%s.", sectimeout,
206 sectimeout != 1 ? "s" : "");
208 (void)printf(" vty locked.");
209 (void)printf("\ntime now is %.20s%s%s", ap, tzn, ap + 19);
214 (void)printf("Key: ");
215 if (!fgets(s, sizeof(s), stdin)) {
221 s[strlen(s) - 1] = '\0';
222 if (!strcmp(mypw, crypt(s, mypw)))
225 else if (!strcmp(s, s1))
227 (void)printf("\07\n");
230 syslog(LOG_NOTICE, "%d ROOT UNLOCK FAILURE%s (%s on %s)",
231 failures, failures > 1 ? "S": "", ttynam, hostname);
232 if (ioctl(0, TIOCGETP, &ntty))
234 sleep(1); /* to discourage guessing */
237 syslog(LOG_NOTICE, "ROOT UNLOCK ON hostname %s port %s",
240 return(0); /* not reached */
247 (void)fprintf(stderr, "usage: lock [-npv] [-t timeout]\n");
252 hi(int signo __unused)
254 struct timeval timval;
256 if (!gettimeofday(&timval, (struct timezone *)NULL)) {
257 (void)printf("lock: type in the unlock key. ");
261 (void)printf("timeout in %ld:%ld minutes\n",
262 (nexttime - timval.tv_sec) / 60,
263 (nexttime - timval.tv_sec) % 60);
269 quit(int signo __unused)
272 (void)ioctl(0, TIOCSETP, &tty);
274 (void)ioctl(0, VT_LOCKSWITCH, &vtyunlock);
279 bye(int signo __unused)
282 (void)ioctl(0, TIOCSETP, &tty);
284 (void)ioctl(0, VT_LOCKSWITCH, &vtyunlock);
285 (void)printf("lock: timeout\n");