68404f13d4
function old new delta procps_scan 1265 1298 +33 aliascmd 278 283 +5 parse_file_cmd 116 120 +4 dname_enc 373 377 +4 setcmd 90 93 +3 execcmd 57 60 +3 count_lines 72 74 +2 process_command_subs 340 339 -1 test_main 409 407 -2 mknod_main 179 177 -2 handle_incoming_and_exit 2653 2651 -2 argstr 1312 1310 -2 shiftcmd 131 128 -3 exitcmd 46 43 -3 dotcmd 297 294 -3 breakcmd 86 83 -3 evalpipe 353 349 -4 evalcommand 1180 1176 -4 evalcmd 109 105 -4 send_tree 374 369 -5 mkfifo_main 82 77 -5 evalsubshell 152 147 -5 typecmd 75 69 -6 letcmd 61 55 -6 add_cmd 1190 1183 -7 main 891 883 -8 ash_main 1415 1407 -8 parse_stream 1377 1367 -10 alloc_procps_scan 55 - -55 ------------------------------------------------------------------------------ (add/remove: 0/1 grow/shrink: 7/21 up/down: 54/-148) Total: -94 bytes text data bss dec hex filename 797195 658 7428 805281 c49a1 busybox_old 797101 658 7428 805187 c4943 busybox_unstripped
107 lines
2.7 KiB
C
107 lines
2.7 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* vlock implementation for busybox
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*
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* Copyright (C) 2000 by spoon <spoon@ix.netcom.com>
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* Written by spoon <spon@ix.netcom.com>
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*
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* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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*/
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/* Shoutz to Michael K. Johnson <johnsonm@redhat.com>, author of the
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* original vlock. I snagged a bunch of his code to write this
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* minimalistic vlock.
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*/
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/* Fixed by Erik Andersen to do passwords the tinylogin way...
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* It now works with md5, sha1, etc passwords. */
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#include <sys/vt.h>
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#include "libbb.h"
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static void release_vt(int signo ATTRIBUTE_UNUSED)
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{
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/* If -a, param is 0, which means:
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* "no, kernel, we don't allow console switch away from us!" */
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ioctl(STDIN_FILENO, VT_RELDISP, (unsigned long) !option_mask32);
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}
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static void acquire_vt(int signo ATTRIBUTE_UNUSED)
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{
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/* ACK to kernel that switch to console is successful */
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ioctl(STDIN_FILENO, VT_RELDISP, VT_ACKACQ);
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}
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int vlock_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int vlock_main(int argc ATTRIBUTE_UNUSED, char **argv)
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{
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struct vt_mode vtm;
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struct termios term;
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struct termios oterm;
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struct vt_mode ovtm;
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uid_t uid;
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struct passwd *pw;
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uid = getuid();
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pw = getpwuid(uid);
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if (pw == NULL)
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bb_error_msg_and_die("unknown uid %d", (int)uid);
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opt_complementary = "=0"; /* no params! */
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getopt32(argv, "a");
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/* Ignore some signals so that we don't get killed by them */
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bb_signals(0
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+ (1 << SIGTSTP)
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+ (1 << SIGTTIN)
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+ (1 << SIGTTOU)
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+ (1 << SIGHUP )
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+ (1 << SIGCHLD) /* paranoia :) */
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+ (1 << SIGQUIT)
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+ (1 << SIGINT )
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, SIG_IGN);
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/* We will use SIGUSRx for console switch control: */
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/* 1: set handlers */
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signal_SA_RESTART_empty_mask(SIGUSR1, release_vt);
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signal_SA_RESTART_empty_mask(SIGUSR2, acquire_vt);
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/* 2: unmask them */
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sig_unblock(SIGUSR1);
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sig_unblock(SIGUSR2);
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/* Revert stdin/out to our controlling tty
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* (or die if we have none) */
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xmove_fd(xopen(CURRENT_TTY, O_RDWR), STDIN_FILENO);
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xdup2(STDIN_FILENO, STDOUT_FILENO);
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xioctl(STDIN_FILENO, VT_GETMODE, &vtm);
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ovtm = vtm;
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/* "console switches are controlled by us, not kernel!" */
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vtm.mode = VT_PROCESS;
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vtm.relsig = SIGUSR1;
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vtm.acqsig = SIGUSR2;
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ioctl(STDIN_FILENO, VT_SETMODE, &vtm);
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tcgetattr(STDIN_FILENO, &oterm);
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term = oterm;
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term.c_iflag &= ~BRKINT;
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term.c_iflag |= IGNBRK;
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term.c_lflag &= ~ISIG;
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term.c_lflag &= ~(ECHO | ECHOCTL);
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tcsetattr(STDIN_FILENO, TCSANOW, &term);
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do {
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printf("Virtual console%s locked by %s.\n",
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option_mask32 /*o_lock_all*/ ? "s" : "",
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pw->pw_name);
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if (correct_password(pw)) {
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break;
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}
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bb_do_delay(FAIL_DELAY);
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puts("Password incorrect");
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} while (1);
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ioctl(STDIN_FILENO, VT_SETMODE, &ovtm);
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tcsetattr(STDIN_FILENO, TCSANOW, &oterm);
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fflush_stdout_and_exit(0);
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}
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