* Copyright (C) 2000 by spoon <spoon@ix.netcom.com>
* Written by spoon <spon@ix.netcom.com>
*
- * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
/* Shoutz to Michael K. Johnson <johnsonm@redhat.com>, author of the
* minimalistic vlock.
*/
/* Fixed by Erik Andersen to do passwords the tinylogin way...
- * It now works with md5, sha1, etc passwords. */
+ * It now works with md5, sha1, etc passwords.
+ */
+//config:config VLOCK
+//config: bool "vlock"
+//config: default y
+//config: help
+//config: Build the "vlock" applet which allows you to lock (virtual) terminals.
+//config:
+//config: Note that Busybox binary must be setuid root for this applet to
+//config: work properly.
+
+//applet:/* Needs to be run by root or be suid root - needs to change uid and gid: */
+//applet:IF_VLOCK(APPLET(vlock, BB_DIR_USR_BIN, BB_SUID_REQUIRE))
+
+//kbuild:lib-$(CONFIG_VLOCK) += vlock.o
+
+//usage:#define vlock_trivial_usage
+//usage: "[-a]"
+//usage:#define vlock_full_usage "\n\n"
+//usage: "Lock a virtual terminal. A password is required to unlock.\n"
+//usage: "\n -a Lock all VTs"
-#include <sys/vt.h>
#include "libbb.h"
+#ifdef __linux__
+#include <sys/vt.h>
+
static void release_vt(int signo UNUSED_PARAM)
{
/* If -a, param is 0, which means:
/* ACK to kernel that switch to console is successful */
ioctl(STDIN_FILENO, VT_RELDISP, VT_ACKACQ);
}
+#endif
int vlock_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int vlock_main(int argc UNUSED_PARAM, char **argv)
{
+#ifdef __linux__
struct vt_mode vtm;
+ struct vt_mode ovtm;
+#endif
struct termios term;
struct termios oterm;
- struct vt_mode ovtm;
struct passwd *pw;
pw = xgetpwuid(getuid());
+ (1 << SIGINT )
, SIG_IGN);
+#ifdef __linux__
/* We will use SIGUSRx for console switch control: */
/* 1: set handlers */
signal_SA_RESTART_empty_mask(SIGUSR1, release_vt);
/* 2: unmask them */
sig_unblock(SIGUSR1);
sig_unblock(SIGUSR2);
+#endif
/* Revert stdin/out to our controlling tty
* (or die if we have none) */
xmove_fd(xopen(CURRENT_TTY, O_RDWR), STDIN_FILENO);
xdup2(STDIN_FILENO, STDOUT_FILENO);
+#ifdef __linux__
xioctl(STDIN_FILENO, VT_GETMODE, &vtm);
ovtm = vtm;
/* "console switches are controlled by us, not kernel!" */
vtm.relsig = SIGUSR1;
vtm.acqsig = SIGUSR2;
ioctl(STDIN_FILENO, VT_SETMODE, &vtm);
+#endif
+//TODO: use set_termios_to_raw()
tcgetattr(STDIN_FILENO, &oterm);
term = oterm;
- term.c_iflag &= ~BRKINT;
- term.c_iflag |= IGNBRK;
- term.c_lflag &= ~ISIG;
- term.c_lflag &= ~(ECHO | ECHOCTL);
+ term.c_iflag |= IGNBRK; /* ignore serial break (why? VTs don't have breaks, right?) */
+ term.c_iflag &= ~BRKINT; /* redundant? "dont translate break to SIGINT" */
+ term.c_lflag &= ~(ISIG | ECHO | ECHOCTL); /* ignore ^C ^Z, echo off */
tcsetattr_stdin_TCSANOW(&term);
- do {
+ while (1) {
printf("Virtual console%s locked by %s.\n",
- option_mask32 /*o_lock_all*/ ? "s" : "",
- pw->pw_name);
- if (correct_password(pw)) {
+ /* "s" if -a, else "": */ "s" + !option_mask32,
+ pw->pw_name
+ );
+ if (ask_and_check_password(pw) > 0) {
break;
}
- bb_do_delay(FAIL_DELAY);
- puts("Password incorrect");
- } while (1);
+ bb_do_delay(LOGIN_FAIL_DELAY);
+ puts("Incorrect password");
+ }
+#ifdef __linux__
ioctl(STDIN_FILENO, VT_SETMODE, &ovtm);
+#endif
tcsetattr_stdin_TCSANOW(&oterm);
fflush_stdout_and_exit(EXIT_SUCCESS);
}