mirror of
https://github.com/sheumann/hush.git
synced 2024-11-18 17:10:36 +00:00
88 lines
2.0 KiB
C
88 lines
2.0 KiB
C
|
/* vi: set sw=4 ts=4: */
|
||
|
|
/*
|
||
|
|
* Ask for a password
|
||
|
|
* I use a static buffer in this function. Plan accordingly.
|
||
|
|
*
|
||
|
|
* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or modify
|
||
|
|
* it under the terms of the GNU General Public License as published by
|
||
|
|
* the Free Software Foundation; either version 2 of the License, or
|
||
|
|
* (at your option) any later version.
|
||
|
|
*
|
||
|
|
* This program is distributed in the hope that it will be useful,
|
||
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||
|
|
* General Public License for more details.
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU General Public License
|
||
|
|
* along with this program; if not, write to the Free Software
|
||
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <stdio.h>
|
||
|
|
#include <string.h>
|
||
|
|
#include <unistd.h>
|
||
|
|
#include <fcntl.h>
|
||
|
|
#include <signal.h>
|
||
|
|
#include <termios.h>
|
||
|
|
#include <sys/ioctl.h>
|
||
|
|
#define PWD_BUFFER_SIZE 256
|
||
|
|
|
||
|
|
|
||
|
|
/* do nothing signal handler */
|
||
|
|
static void askpass_timeout(int ignore)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
char *bb_askpass(int timeout, const char * prompt)
|
||
|
|
{
|
||
|
|
char *ret;
|
||
|
|
int i, size;
|
||
|
|
struct sigaction sa;
|
||
|
|
struct termios old, new;
|
||
|
|
static char passwd[PWD_BUFFER_SIZE];
|
||
|
|
|
||
|
|
tcgetattr(STDIN_FILENO, &old);
|
||
|
|
|
||
|
|
size = sizeof(passwd);
|
||
|
|
ret = passwd;
|
||
|
|
memset(passwd, 0, size);
|
||
|
|
|
||
|
|
fputs(prompt, stdout);
|
||
|
|
fflush(stdout);
|
||
|
|
|
||
|
|
tcgetattr(STDIN_FILENO, &new);
|
||
|
|
new.c_iflag &= ~(IUCLC|IXON|IXOFF|IXANY);
|
||
|
|
new.c_lflag &= ~(ECHO|ECHOE|ECHOK|ECHONL|TOSTOP);
|
||
|
|
tcsetattr(STDIN_FILENO, TCSANOW, &new);
|
||
|
|
|
||
|
|
if (timeout) {
|
||
|
|
sa.sa_flags = 0;
|
||
|
|
sa.sa_handler = askpass_timeout;
|
||
|
|
sigaction(SIGALRM, &sa, NULL);
|
||
|
|
alarm(timeout);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (read(STDIN_FILENO, passwd, size-1) <= 0) {
|
||
|
|
ret = NULL;
|
||
|
|
} else {
|
||
|
|
for(i = 0; i < size && passwd[i]; i++) {
|
||
|
|
if (passwd[i]== '\r' || passwd[i] == '\n') {
|
||
|
|
passwd[i]= 0;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (timeout) {
|
||
|
|
alarm(0);
|
||
|
|
}
|
||
|
|
|
||
|
|
tcsetattr(STDIN_FILENO, TCSANOW, &old);
|
||
|
|
fputs("\n", stdout);
|
||
|
|
fflush(stdout);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|