Contents of /trunk/mkinitrd-magellan/busybox/libbb/bb_askpass.c
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Sat Sep 1 22:45:15 2007 UTC (17 years ago) by niro
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Sat Sep 1 22:45:15 2007 UTC (17 years ago) by niro
File MIME type: text/plain
File size: 1504 byte(s)
-import if magellan mkinitrd; it is a fork of redhats mkinitrd-5.0.8 with all magellan patches and features; deprecates magellan-src/mkinitrd
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * Ask for a password |
4 | * I use a static buffer in this function. Plan accordingly. |
5 | * |
6 | * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org> |
7 | * |
8 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. |
9 | */ |
10 | |
11 | #include <stdio.h> |
12 | #include <string.h> |
13 | #include <unistd.h> |
14 | #include <fcntl.h> |
15 | #include <signal.h> |
16 | #include <termios.h> |
17 | #include <sys/ioctl.h> |
18 | |
19 | #include "libbb.h" |
20 | |
21 | /* do nothing signal handler */ |
22 | static void askpass_timeout(int ATTRIBUTE_UNUSED ignore) |
23 | { |
24 | } |
25 | |
26 | char *bb_askpass(int timeout, const char * prompt) |
27 | { |
28 | static char passwd[64]; |
29 | |
30 | char *ret; |
31 | int i; |
32 | struct sigaction sa; |
33 | struct termios old, new; |
34 | |
35 | tcgetattr(STDIN_FILENO, &old); |
36 | tcflush(STDIN_FILENO, TCIFLUSH); |
37 | |
38 | memset(passwd, 0, sizeof(passwd)); |
39 | |
40 | fputs(prompt, stdout); |
41 | fflush(stdout); |
42 | |
43 | tcgetattr(STDIN_FILENO, &new); |
44 | new.c_iflag &= ~(IUCLC|IXON|IXOFF|IXANY); |
45 | new.c_lflag &= ~(ECHO|ECHOE|ECHOK|ECHONL|TOSTOP); |
46 | tcsetattr(STDIN_FILENO, TCSANOW, &new); |
47 | |
48 | if (timeout) { |
49 | sa.sa_flags = 0; |
50 | sa.sa_handler = askpass_timeout; |
51 | sigaction(SIGALRM, &sa, NULL); |
52 | alarm(timeout); |
53 | } |
54 | |
55 | ret = NULL; |
56 | if (read(STDIN_FILENO, passwd, sizeof(passwd)-1) > 0) { |
57 | ret = passwd; |
58 | i = 0; |
59 | /* Last byte is guaranteed to be 0 |
60 | (read did not overwrite it) */ |
61 | do { |
62 | if (passwd[i] == '\r' || passwd[i] == '\n') |
63 | passwd[i] = '\0'; |
64 | } while (passwd[i++]); |
65 | } |
66 | |
67 | if (timeout) { |
68 | alarm(0); |
69 | } |
70 | |
71 | tcsetattr(STDIN_FILENO, TCSANOW, &old); |
72 | puts(""); |
73 | fflush(stdout); |
74 | return ret; |
75 | } |