1 /* vi: set sw=4 ts=4: */
4 * vlock implementation for busybox
6 * Copyright (C) 2000 by spoon <spoon@ix.netcom.com>
7 * Written by spoon <spon@ix.netcom.com>
9 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
12 /* Shoutz to Michael K. Johnson <johnsonm@redhat.com>, author of the
13 * original vlock. I snagged a bunch of his code to write this
16 /* Fixed by Erik Andersen to do passwords the tinylogin way...
17 * It now works with md5, sha1, etc passwords. */
22 static struct passwd *pw;
23 static struct vt_mode ovtm;
24 static struct termios oterm;
26 static unsigned long o_lock_all;
28 static void release_vt(int signo)
30 ioctl(vfd, VT_RELDISP, !o_lock_all);
33 static void acquire_vt(int signo)
35 ioctl(vfd, VT_RELDISP, VT_ACKACQ);
38 static void restore_terminal(void)
40 ioctl(vfd, VT_SETMODE, &ovtm);
41 tcsetattr(STDIN_FILENO, TCSANOW, &oterm);
44 int vlock_main(int argc, char **argv)
54 bb_error_msg_and_die("unknown uid %d", uid);
60 o_lock_all = getopt32(argc, argv, "a");
62 vfd = xopen(CURRENT_TTY, O_RDWR);
64 if (ioctl(vfd, VT_GETMODE, &vtm) < 0) {
65 bb_perror_msg_and_die("VT_GETMODE");
68 /* mask a bunch of signals */
69 sigprocmask(SIG_SETMASK, NULL, &sig);
70 sigdelset(&sig, SIGUSR1);
71 sigdelset(&sig, SIGUSR2);
72 sigaddset(&sig, SIGTSTP);
73 sigaddset(&sig, SIGTTIN);
74 sigaddset(&sig, SIGTTOU);
75 sigaddset(&sig, SIGHUP);
76 sigaddset(&sig, SIGCHLD);
77 sigaddset(&sig, SIGQUIT);
78 sigaddset(&sig, SIGINT);
80 sigemptyset(&(sa.sa_mask));
81 sa.sa_flags = SA_RESTART;
82 sa.sa_handler = release_vt;
83 sigaction(SIGUSR1, &sa, NULL);
84 sa.sa_handler = acquire_vt;
85 sigaction(SIGUSR2, &sa, NULL);
87 /* need to handle some signals so that we don't get killed by them */
88 sa.sa_handler = SIG_IGN;
89 sigaction(SIGHUP, &sa, NULL);
90 sigaction(SIGQUIT, &sa, NULL);
91 sigaction(SIGINT, &sa, NULL);
92 sigaction(SIGTSTP, &sa, NULL);
95 vtm.mode = VT_PROCESS;
98 ioctl(vfd, VT_SETMODE, &vtm);
100 tcgetattr(STDIN_FILENO, &oterm);
102 term.c_iflag &= ~BRKINT;
103 term.c_iflag |= IGNBRK;
104 term.c_lflag &= ~ISIG;
105 term.c_lflag &= ~(ECHO | ECHOCTL);
106 tcsetattr(STDIN_FILENO, TCSANOW, &term);
109 printf("Virtual Console%s locked by %s.\n", (o_lock_all) ? "s" : "", pw->pw_name);
110 if (correct_password(pw)) {
113 bb_do_delay(FAIL_DELAY);
114 puts("Password incorrect");
117 fflush_stdout_and_exit(0);