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
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9 * modification, are permitted provided that the following conditions
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17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
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36 * @(#) Copyright (c) 1980, 1987, 1993 The Regents of the University of California. All rights reserved.
37 * @(#)lock.c 8.1 (Berkeley) 6/6/93
38 * $FreeBSD: src/usr.bin/lock/lock.c,v 1.8.2.1 2002/09/15 22:32:56 dd Exp $
39 * $DragonFly: src/usr.bin/lock/lock.c,v 1.2 2003/06/17 04:29:28 dillon Exp $
43 * Lock a terminal up until the given key is entered or the given
46 * Timeout interval is by default TIMEOUT, it can be changed with
47 * an argument of the form -time where time is in minutes
50 #include <sys/param.h>
53 #include <sys/signal.h>
54 #include <sys/consio.h>
71 static void usage(void);
73 struct timeval timeout;
74 struct timeval zerotime;
75 struct sgttyb tty, ntty;
76 long nexttime; /* keep the timeout time */
77 int no_timeout; /* lock terminal forever */
78 int vtyunlock; /* Unlock flag and code. */
87 struct timeval timval;
89 struct itimerval ntimer, otimer;
91 int ch, failures, sectimeout, usemine, vtylock;
92 char *ap, *mypw, *ttynam, *tzn;
93 char hostname[MAXHOSTNAMELEN], s[BUFSIZ], s1[BUFSIZ];
95 openlog("lock", LOG_ODELAY, LOG_AUTH);
102 while ((ch = getopt(argc, argv, "npt:v")) != -1)
105 if ((sectimeout = atoi(optarg)) <= 0)
106 errx(1, "illegal timeout value");
110 if (!(pw = getpwuid(getuid())))
111 errx(1, "unknown uid %d", getuid());
112 mypw = strdup(pw->pw_passwd);
124 timeout.tv_sec = sectimeout * 60;
126 setuid(getuid()); /* discard privs */
128 if (ioctl(0, TIOCGETP, &tty)) /* get information for header */
130 gethostname(hostname, sizeof(hostname));
131 if (!(ttynam = ttyname(0)))
132 errx(1, "not a terminal?");
133 if (gettimeofday(&timval, (struct timezone *)NULL))
134 err(1, "gettimeofday");
135 nexttime = timval.tv_sec + (sectimeout * 60);
136 timval_sec = timval.tv_sec;
137 timp = localtime(&timval_sec);
141 (void)signal(SIGINT, quit);
142 (void)signal(SIGQUIT, quit);
143 ntty = tty; ntty.sg_flags &= ~ECHO;
144 (void)ioctl(0, TIOCSETP, &ntty);
147 /* get key and check again */
148 (void)printf("Key: ");
149 if (!fgets(s, sizeof(s), stdin) || *s == '\n')
151 (void)printf("\nAgain: ");
153 * Don't need EOF test here, if we get EOF, then s1 != s
154 * and the right things will happen.
156 (void)fgets(s1, sizeof(s1), stdin);
159 (void)printf("\07lock: passwords didn't match.\n");
160 ioctl(0, TIOCSETP, &tty);
167 /* set signal handlers */
168 (void)signal(SIGINT, hi);
169 (void)signal(SIGQUIT, hi);
170 (void)signal(SIGTSTP, hi);
171 (void)signal(SIGALRM, bye);
173 ntimer.it_interval = zerotime;
174 ntimer.it_value = timeout;
176 setitimer(ITIMER_REAL, &ntimer, &otimer);
179 * If this failed, we want to err out; warn isn't good
180 * enough, since we don't want the user to think that
181 * everything is nice and locked because they got a
184 if (ioctl(0, VT_LOCKSWITCH, &vtylock) == -1) {
185 (void)ioctl(0, TIOCSETP, &tty);
186 err(1, "locking vty");
192 (void)printf("lock: %s on %s.", ttynam, hostname);
194 (void)printf(" no timeout.");
196 (void)printf(" timeout in %d minute%s.", sectimeout,
197 sectimeout != 1 ? "s" : "");
199 (void)printf(" vty locked.");
200 (void)printf("\ntime now is %.20s%s%s", ap, tzn, ap + 19);
205 (void)printf("Key: ");
206 if (!fgets(s, sizeof(s), stdin)) {
212 s[strlen(s) - 1] = '\0';
213 if (!strcmp(mypw, crypt(s, mypw)))
216 else if (!strcmp(s, s1))
218 (void)printf("\07\n");
221 syslog(LOG_NOTICE, "%d ROOT UNLOCK FAILURE%s (%s on %s)",
222 failures, failures > 1 ? "S": "", ttynam, hostname);
223 if (ioctl(0, TIOCGETP, &ntty))
225 sleep(1); /* to discourage guessing */
228 syslog(LOG_NOTICE, "ROOT UNLOCK ON hostname %s port %s",
231 return(0); /* not reached */
238 (void)fprintf(stderr, "usage: lock [-npv] [-t timeout]\n");
243 hi(int signo __unused)
245 struct timeval timval;
247 if (!gettimeofday(&timval, (struct timezone *)NULL)) {
248 (void)printf("lock: type in the unlock key. ");
252 (void)printf("timeout in %ld:%ld minutes\n",
253 (nexttime - timval.tv_sec) / 60,
254 (nexttime - timval.tv_sec) % 60);
260 quit(int signo __unused)
263 (void)ioctl(0, TIOCSETP, &tty);
265 (void)ioctl(0, VT_LOCKSWITCH, &vtyunlock);
270 bye(int signo __unused)
273 (void)ioctl(0, TIOCSETP, &tty);
275 (void)ioctl(0, VT_LOCKSWITCH, &vtyunlock);
276 (void)printf("lock: timeout\n");