d921b2ecc0
things like xasprintf() into xfuncs.c, remove xprint_file_by_name() (it only had one user), clean up lots of #includes... General cleanup pass. What I've been doing for the last couple days. And it conflicts! I've removed httpd.c from this checkin due to somebody else touching that file. It builds for me. I have to catch a bus. (Now you know why I'm looking forward to Mercurial.)
122 lines
2.7 KiB
C
122 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 "busybox.h"
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#include <sys/vt.h>
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static struct passwd *pw;
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static struct vt_mode ovtm;
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static struct termios oterm;
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static int vfd;
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static unsigned long o_lock_all;
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static void release_vt(int signo)
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{
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if (!o_lock_all)
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ioctl(vfd, VT_RELDISP, 1);
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else
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ioctl(vfd, VT_RELDISP, 0);
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}
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static void acquire_vt(int signo)
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{
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ioctl(vfd, VT_RELDISP, VT_ACKACQ);
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}
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static void restore_terminal(void)
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{
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ioctl(vfd, VT_SETMODE, &ovtm);
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tcsetattr(STDIN_FILENO, TCSANOW, &oterm);
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}
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int vlock_main(int argc, char **argv)
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{
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sigset_t sig;
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struct sigaction sa;
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struct vt_mode vtm;
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struct termios term;
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if (argc > 2) {
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bb_show_usage();
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}
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o_lock_all = bb_getopt_ulflags (argc, argv, "a");
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if((pw = getpwuid(getuid())) == NULL) {
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bb_error_msg_and_die("Unknown uid %d", getuid());
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}
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vfd = xopen(CURRENT_TTY, O_RDWR);
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if (ioctl(vfd, VT_GETMODE, &vtm) < 0) {
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bb_perror_msg_and_die("VT_GETMODE");
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}
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/* mask a bunch of signals */
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sigprocmask(SIG_SETMASK, NULL, &sig);
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sigdelset(&sig, SIGUSR1);
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sigdelset(&sig, SIGUSR2);
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sigaddset(&sig, SIGTSTP);
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sigaddset(&sig, SIGTTIN);
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sigaddset(&sig, SIGTTOU);
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sigaddset(&sig, SIGHUP);
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sigaddset(&sig, SIGCHLD);
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sigaddset(&sig, SIGQUIT);
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sigaddset(&sig, SIGINT);
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sigemptyset(&(sa.sa_mask));
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sa.sa_flags = SA_RESTART;
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sa.sa_handler = release_vt;
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sigaction(SIGUSR1, &sa, NULL);
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sa.sa_handler = acquire_vt;
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sigaction(SIGUSR2, &sa, NULL);
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/* need to handle some signals so that we don't get killed by them */
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sa.sa_handler = SIG_IGN;
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sigaction(SIGHUP, &sa, NULL);
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sigaction(SIGQUIT, &sa, NULL);
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sigaction(SIGINT, &sa, NULL);
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sigaction(SIGTSTP, &sa, NULL);
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ovtm = vtm;
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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(vfd, 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.\n%s's ", (o_lock_all) ? "s" : "", pw->pw_name);
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fflush(stdout);
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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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restore_terminal();
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return 0;
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}
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