Contents of /trunk/mkinitrd-magellan/busybox/libbb/bb_askpass.c
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Wed Aug 18 21:56:57 2010 UTC (14 years, 1 month ago) by niro
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Wed Aug 18 21:56:57 2010 UTC (14 years, 1 month ago) by niro
File MIME type: text/plain
File size: 1751 byte(s)
-updated to busybox-1.17.1
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 "libbb.h" |
12 | |
13 | /* do nothing signal handler */ |
14 | static void askpass_timeout(int UNUSED_PARAM ignore) |
15 | { |
16 | } |
17 | |
18 | char* FAST_FUNC bb_ask_stdin(const char *prompt) |
19 | { |
20 | return bb_ask(STDIN_FILENO, 0, prompt); |
21 | } |
22 | char* FAST_FUNC bb_ask(const int fd, int timeout, const char *prompt) |
23 | { |
24 | /* Was static char[BIGNUM] */ |
25 | enum { sizeof_passwd = 128 }; |
26 | static char *passwd; |
27 | |
28 | char *ret; |
29 | int i; |
30 | struct sigaction sa, oldsa; |
31 | struct termios tio, oldtio; |
32 | |
33 | tcgetattr(fd, &oldtio); |
34 | tcflush(fd, TCIFLUSH); |
35 | tio = oldtio; |
36 | #ifndef IUCLC |
37 | # define IUCLC 0 |
38 | #endif |
39 | tio.c_iflag &= ~(IUCLC|IXON|IXOFF|IXANY); |
40 | tio.c_lflag &= ~(ECHO|ECHOE|ECHOK|ECHONL|TOSTOP); |
41 | tcsetattr(fd, TCSANOW, &tio); |
42 | |
43 | memset(&sa, 0, sizeof(sa)); |
44 | /* sa.sa_flags = 0; - no SA_RESTART! */ |
45 | /* SIGINT and SIGALRM will interrupt reads below */ |
46 | sa.sa_handler = askpass_timeout; |
47 | sigaction(SIGINT, &sa, &oldsa); |
48 | if (timeout) { |
49 | sigaction_set(SIGALRM, &sa); |
50 | alarm(timeout); |
51 | } |
52 | |
53 | fputs(prompt, stdout); |
54 | fflush_all(); |
55 | |
56 | if (!passwd) |
57 | passwd = xmalloc(sizeof_passwd); |
58 | ret = passwd; |
59 | i = 0; |
60 | while (1) { |
61 | int r = read(fd, &ret[i], 1); |
62 | if (r < 0) { |
63 | /* read is interrupted by timeout or ^C */ |
64 | ret = NULL; |
65 | break; |
66 | } |
67 | if (r == 0 /* EOF */ |
68 | || ret[i] == '\r' || ret[i] == '\n' /* EOL */ |
69 | || ++i == sizeof_passwd-1 /* line limit */ |
70 | ) { |
71 | ret[i] = '\0'; |
72 | break; |
73 | } |
74 | } |
75 | |
76 | if (timeout) { |
77 | alarm(0); |
78 | } |
79 | sigaction_set(SIGINT, &oldsa); |
80 | tcsetattr(fd, TCSANOW, &oldtio); |
81 | bb_putchar('\n'); |
82 | fflush_all(); |
83 | return ret; |
84 | } |