Annotation of /trunk/mkinitrd-magellan/busybox/loginutils/vlock.c
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Revision 816 -
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Fri Apr 24 18:33:46 2009 UTC (15 years, 1 month ago) by niro
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File size: 2796 byte(s)
Fri Apr 24 18:33:46 2009 UTC (15 years, 1 month ago) by niro
File MIME type: text/plain
File size: 2796 byte(s)
-updated to busybox-1.13.4
1 | niro | 532 | /* vi: set sw=4 ts=4: */ |
2 | /* | ||
3 | * vlock implementation for busybox | ||
4 | * | ||
5 | * Copyright (C) 2000 by spoon <spoon@ix.netcom.com> | ||
6 | * Written by spoon <spon@ix.netcom.com> | ||
7 | * | ||
8 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. | ||
9 | */ | ||
10 | |||
11 | /* Shoutz to Michael K. Johnson <johnsonm@redhat.com>, author of the | ||
12 | * original vlock. I snagged a bunch of his code to write this | ||
13 | * minimalistic vlock. | ||
14 | */ | ||
15 | /* Fixed by Erik Andersen to do passwords the tinylogin way... | ||
16 | * It now works with md5, sha1, etc passwords. */ | ||
17 | |||
18 | #include <sys/vt.h> | ||
19 | niro | 816 | #include "libbb.h" |
20 | niro | 532 | |
21 | niro | 816 | static void release_vt(int signo UNUSED_PARAM) |
22 | niro | 532 | { |
23 | niro | 816 | /* If -a, param is 0, which means: |
24 | * "no, kernel, we don't allow console switch away from us!" */ | ||
25 | ioctl(STDIN_FILENO, VT_RELDISP, (unsigned long) !option_mask32); | ||
26 | niro | 532 | } |
27 | |||
28 | niro | 816 | static void acquire_vt(int signo UNUSED_PARAM) |
29 | niro | 532 | { |
30 | niro | 816 | /* ACK to kernel that switch to console is successful */ |
31 | ioctl(STDIN_FILENO, VT_RELDISP, VT_ACKACQ); | ||
32 | niro | 532 | } |
33 | |||
34 | niro | 816 | int vlock_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
35 | int vlock_main(int argc UNUSED_PARAM, char **argv) | ||
36 | niro | 532 | { |
37 | struct vt_mode vtm; | ||
38 | struct termios term; | ||
39 | niro | 816 | struct termios oterm; |
40 | struct vt_mode ovtm; | ||
41 | uid_t uid; | ||
42 | struct passwd *pw; | ||
43 | /* XXX: xgetpwuid */ | ||
44 | uid = getuid(); | ||
45 | niro | 532 | pw = getpwuid(uid); |
46 | if (pw == NULL) | ||
47 | niro | 816 | bb_error_msg_and_die("unknown uid %d", (int)uid); |
48 | niro | 532 | |
49 | niro | 816 | opt_complementary = "=0"; /* no params! */ |
50 | getopt32(argv, "a"); | ||
51 | niro | 532 | |
52 | niro | 816 | /* Ignore some signals so that we don't get killed by them */ |
53 | bb_signals(0 | ||
54 | + (1 << SIGTSTP) | ||
55 | + (1 << SIGTTIN) | ||
56 | + (1 << SIGTTOU) | ||
57 | + (1 << SIGHUP ) | ||
58 | + (1 << SIGCHLD) /* paranoia :) */ | ||
59 | + (1 << SIGQUIT) | ||
60 | + (1 << SIGINT ) | ||
61 | , SIG_IGN); | ||
62 | niro | 532 | |
63 | niro | 816 | /* We will use SIGUSRx for console switch control: */ |
64 | /* 1: set handlers */ | ||
65 | signal_SA_RESTART_empty_mask(SIGUSR1, release_vt); | ||
66 | signal_SA_RESTART_empty_mask(SIGUSR2, acquire_vt); | ||
67 | /* 2: unmask them */ | ||
68 | sig_unblock(SIGUSR1); | ||
69 | sig_unblock(SIGUSR2); | ||
70 | niro | 532 | |
71 | niro | 816 | /* Revert stdin/out to our controlling tty |
72 | * (or die if we have none) */ | ||
73 | xmove_fd(xopen(CURRENT_TTY, O_RDWR), STDIN_FILENO); | ||
74 | xdup2(STDIN_FILENO, STDOUT_FILENO); | ||
75 | niro | 532 | |
76 | niro | 816 | xioctl(STDIN_FILENO, VT_GETMODE, &vtm); |
77 | niro | 532 | ovtm = vtm; |
78 | niro | 816 | /* "console switches are controlled by us, not kernel!" */ |
79 | niro | 532 | vtm.mode = VT_PROCESS; |
80 | vtm.relsig = SIGUSR1; | ||
81 | vtm.acqsig = SIGUSR2; | ||
82 | niro | 816 | ioctl(STDIN_FILENO, VT_SETMODE, &vtm); |
83 | niro | 532 | |
84 | tcgetattr(STDIN_FILENO, &oterm); | ||
85 | term = oterm; | ||
86 | term.c_iflag &= ~BRKINT; | ||
87 | term.c_iflag |= IGNBRK; | ||
88 | term.c_lflag &= ~ISIG; | ||
89 | term.c_lflag &= ~(ECHO | ECHOCTL); | ||
90 | niro | 816 | tcsetattr_stdin_TCSANOW(&term); |
91 | niro | 532 | |
92 | do { | ||
93 | niro | 816 | printf("Virtual console%s locked by %s.\n", |
94 | option_mask32 /*o_lock_all*/ ? "s" : "", | ||
95 | pw->pw_name); | ||
96 | niro | 532 | if (correct_password(pw)) { |
97 | break; | ||
98 | } | ||
99 | bb_do_delay(FAIL_DELAY); | ||
100 | puts("Password incorrect"); | ||
101 | } while (1); | ||
102 | niro | 816 | |
103 | ioctl(STDIN_FILENO, VT_SETMODE, &ovtm); | ||
104 | tcsetattr_stdin_TCSANOW(&oterm); | ||
105 | fflush_stdout_and_exit(EXIT_SUCCESS); | ||
106 | niro | 532 | } |