source: MondoRescue/branches/stable/mindi-busybox/libbb/bb_askpass.c @ 821

Last change on this file since 821 was 821, checked in by Bruno Cornec, 14 years ago

Addition of busybox 1.2.1 as a mindi-busybox new package
This should avoid delivering binary files in mindi not built there (Fedora and Debian are quite serious about that)

File size: 1.5 KB
Line 
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#define PWD_BUFFER_SIZE 256
21
22
23/* do nothing signal handler */
24static void askpass_timeout(int ATTRIBUTE_UNUSED ignore)
25{
26}
27
28char *bb_askpass(int timeout, const char * prompt)
29{
30    char *ret;
31    int i, size;
32    struct sigaction sa;
33    struct termios old, new;
34    static char passwd[PWD_BUFFER_SIZE];
35
36    tcgetattr(STDIN_FILENO, &old);
37    tcflush(STDIN_FILENO, TCIFLUSH);
38
39    size = sizeof(passwd);
40    ret = passwd;
41    memset(passwd, 0, size);
42
43    fputs(prompt, stdout);
44    fflush(stdout);
45
46    tcgetattr(STDIN_FILENO, &new);
47    new.c_iflag &= ~(IUCLC|IXON|IXOFF|IXANY);
48    new.c_lflag &= ~(ECHO|ECHOE|ECHOK|ECHONL|TOSTOP);
49    tcsetattr(STDIN_FILENO, TCSANOW, &new);
50
51    if (timeout) {
52        sa.sa_flags = 0;
53        sa.sa_handler = askpass_timeout;
54        sigaction(SIGALRM, &sa, NULL);
55        alarm(timeout);
56    }
57
58    if (read(STDIN_FILENO, passwd, size-1) <= 0) {
59        ret = NULL;
60    } else {
61        for(i = 0; i < size && passwd[i]; i++) {
62            if (passwd[i]== '\r' || passwd[i] == '\n') {
63                passwd[i]= 0;
64                break;
65            }
66        }
67    }
68
69    if (timeout) {
70        alarm(0);
71    }
72
73    tcsetattr(STDIN_FILENO, TCSANOW, &old);
74    fputs("\n", stdout);
75    fflush(stdout);
76    return ret;
77}
78
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