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";
47 static const char rcsid[] =
52 * Lock a terminal up until the given key is entered, until the root
53 * password is entered, or the given interval times out.
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>
74 void quit(), bye(), hi();
75 static void usage __P((void));
77 struct timeval timeout;
78 struct timeval zerotime;
79 struct sgttyb tty, ntty;
80 long nexttime; /* keep the timeout time */
81 int no_timeout; /* lock terminal forever */
90 struct timeval timval;
92 struct itimerval ntimer, otimer;
94 int ch, sectimeout, usemine;
95 char *ap, *mypw, *ttynam, *tzn;
96 char hostname[MAXHOSTNAMELEN], s[BUFSIZ], s1[BUFSIZ];
97 char *crypt(), *ttyname();
103 while ((ch = getopt(argc, argv, "npt:")) != -1)
106 if ((sectimeout = atoi(optarg)) <= 0)
107 errx(1, "illegal timeout value");
111 if (!(pw = getpwuid(getuid())))
112 errx(1, "unknown uid %d", getuid());
113 mypw = strdup(pw->pw_passwd);
122 timeout.tv_sec = sectimeout * 60;
124 setuid(getuid()); /* discard privs */
126 if (ioctl(0, TIOCGETP, &tty)) /* get information for header */
128 gethostname(hostname, sizeof(hostname));
129 if (!(ttynam = ttyname(0)))
130 errx(1, "not a terminal?");
131 if (gettimeofday(&timval, (struct timezone *)NULL))
132 err(1, "gettimeofday");
133 nexttime = timval.tv_sec + (sectimeout * 60);
134 timval_sec = timval.tv_sec;
135 timp = localtime(&timval_sec);
139 (void)signal(SIGINT, quit);
140 (void)signal(SIGQUIT, quit);
141 ntty = tty; ntty.sg_flags &= ~ECHO;
142 (void)ioctl(0, TIOCSETP, &ntty);
145 /* get key and check again */
146 (void)printf("Key: ");
147 if (!fgets(s, sizeof(s), stdin) || *s == '\n')
149 (void)printf("\nAgain: ");
151 * Don't need EOF test here, if we get EOF, then s1 != s
152 * and the right things will happen.
154 (void)fgets(s1, sizeof(s1), stdin);
157 (void)printf("\07lock: passwords didn't match.\n");
158 ioctl(0, TIOCSETP, &tty);
165 /* set signal handlers */
166 (void)signal(SIGINT, hi);
167 (void)signal(SIGQUIT, hi);
168 (void)signal(SIGTSTP, hi);
169 (void)signal(SIGALRM, bye);
171 ntimer.it_interval = zerotime;
172 ntimer.it_value = timeout;
174 setitimer(ITIMER_REAL, &ntimer, &otimer);
178 (void)printf("lock: %s on %s. no timeout\ntime now is %.20s%s%s",
179 ttynam, hostname, ap, tzn, ap + 19);
181 (void)printf("lock: %s on %s. timeout in %d minutes\ntime now is %.20s%s%s",
182 ttynam, hostname, sectimeout, ap, tzn, ap + 19);
186 (void)printf("Key: ");
187 if (!fgets(s, sizeof(s), stdin)) {
193 s[strlen(s) - 1] = '\0';
194 if (!strcmp(mypw, crypt(s, mypw)))
197 else if (!strcmp(s, s1))
199 (void)printf("\07\n");
200 if (ioctl(0, TIOCGETP, &ntty))
204 return(0); /* not reached */
211 (void)fprintf(stderr, "usage: lock [-n] [-p] [-t timeout]\n");
218 struct timeval timval;
220 if (!gettimeofday(&timval, (struct timezone *)NULL)) {
221 (void)printf("lock: type in the unlock key. ");
225 (void)printf("timeout in %ld:%ld minutes\n",
226 (nexttime - timval.tv_sec) / 60,
227 (nexttime - timval.tv_sec) % 60);
236 (void)ioctl(0, TIOCSETP, &tty);
244 (void)ioctl(0, TIOCSETP, &tty);
245 (void)printf("lock: timeout\n");