202ac504e1
function old new delta tcsetattr_stdin_TCSANOW - 14 +14 set_sane_term 116 113 -3 top_main 1277 1273 -4 make_new_session 421 415 -6 rawmode 133 126 -7 reset_term 18 10 -8 die 43 35 -8 cookmode 62 54 -8 vlock_main 425 415 -10 read_line_input 3165 3155 -10 bb_askpass 357 347 -10 fsck_minix_main 3079 3065 -14 getty_main 2375 2332 -43 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 0/12 up/down: 14/-131) Total: -117 bytes
107 lines
2.7 KiB
C
107 lines
2.7 KiB
C
/* vi: set sw=4 ts=4: */
|
|
/*
|
|
* vlock implementation for busybox
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
/* Shoutz to Michael K. Johnson <johnsonm@redhat.com>, author of the
|
|
* original vlock. I snagged a bunch of his code to write this
|
|
* minimalistic vlock.
|
|
*/
|
|
/* Fixed by Erik Andersen to do passwords the tinylogin way...
|
|
* It now works with md5, sha1, etc passwords. */
|
|
|
|
#include <sys/vt.h>
|
|
#include "libbb.h"
|
|
|
|
static void release_vt(int signo UNUSED_PARAM)
|
|
{
|
|
/* If -a, param is 0, which means:
|
|
* "no, kernel, we don't allow console switch away from us!" */
|
|
ioctl(STDIN_FILENO, VT_RELDISP, (unsigned long) !option_mask32);
|
|
}
|
|
|
|
static void acquire_vt(int signo UNUSED_PARAM)
|
|
{
|
|
/* ACK to kernel that switch to console is successful */
|
|
ioctl(STDIN_FILENO, VT_RELDISP, VT_ACKACQ);
|
|
}
|
|
|
|
int vlock_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
|
int vlock_main(int argc UNUSED_PARAM, char **argv)
|
|
{
|
|
struct vt_mode vtm;
|
|
struct termios term;
|
|
struct termios oterm;
|
|
struct vt_mode ovtm;
|
|
uid_t uid;
|
|
struct passwd *pw;
|
|
/* XXX: xgetpwuid */
|
|
uid = getuid();
|
|
pw = getpwuid(uid);
|
|
if (pw == NULL)
|
|
bb_error_msg_and_die("unknown uid %d", (int)uid);
|
|
|
|
opt_complementary = "=0"; /* no params! */
|
|
getopt32(argv, "a");
|
|
|
|
/* Ignore some signals so that we don't get killed by them */
|
|
bb_signals(0
|
|
+ (1 << SIGTSTP)
|
|
+ (1 << SIGTTIN)
|
|
+ (1 << SIGTTOU)
|
|
+ (1 << SIGHUP )
|
|
+ (1 << SIGCHLD) /* paranoia :) */
|
|
+ (1 << SIGQUIT)
|
|
+ (1 << SIGINT )
|
|
, SIG_IGN);
|
|
|
|
/* We will use SIGUSRx for console switch control: */
|
|
/* 1: set handlers */
|
|
signal_SA_RESTART_empty_mask(SIGUSR1, release_vt);
|
|
signal_SA_RESTART_empty_mask(SIGUSR2, acquire_vt);
|
|
/* 2: unmask them */
|
|
sig_unblock(SIGUSR1);
|
|
sig_unblock(SIGUSR2);
|
|
|
|
/* 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);
|
|
|
|
xioctl(STDIN_FILENO, VT_GETMODE, &vtm);
|
|
ovtm = vtm;
|
|
/* "console switches are controlled by us, not kernel!" */
|
|
vtm.mode = VT_PROCESS;
|
|
vtm.relsig = SIGUSR1;
|
|
vtm.acqsig = SIGUSR2;
|
|
ioctl(STDIN_FILENO, VT_SETMODE, &vtm);
|
|
|
|
tcgetattr(STDIN_FILENO, &oterm);
|
|
term = oterm;
|
|
term.c_iflag &= ~BRKINT;
|
|
term.c_iflag |= IGNBRK;
|
|
term.c_lflag &= ~ISIG;
|
|
term.c_lflag &= ~(ECHO | ECHOCTL);
|
|
tcsetattr_stdin_TCSANOW(&term);
|
|
|
|
do {
|
|
printf("Virtual console%s locked by %s.\n",
|
|
option_mask32 /*o_lock_all*/ ? "s" : "",
|
|
pw->pw_name);
|
|
if (correct_password(pw)) {
|
|
break;
|
|
}
|
|
bb_do_delay(FAIL_DELAY);
|
|
puts("Password incorrect");
|
|
} while (1);
|
|
|
|
ioctl(STDIN_FILENO, VT_SETMODE, &ovtm);
|
|
tcsetattr_stdin_TCSANOW(&oterm);
|
|
fflush_stdout_and_exit(EXIT_SUCCESS);
|
|
}
|