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/************************************************************************************
Copyright (C) 2014 MariaDB Corporation AB
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not see <http://www.gnu.org/licenses>
or write to the Free Software Foundation, Inc.,
51 Franklin St., Fifth Floor, Boston, MA 02110, USA
*************************************************************************************/
#include <my_global.h>
#include <my_sys.h>
#include "mysql.h"
#include <m_string.h>
#include <m_ctype.h>
#include <stdio.h>
#include <memory.h>
#ifndef _WIN32
#include <termios.h>
#else
#include <conio.h>
#endif /* _WIN32 */
/* {{{ static char *get_password() */
/*
read password from device
SYNOPSIS
get_password
Hdl/file file handle
buffer input buffer
length buffer length
RETURN
buffer zero terminated input buffer
*/
#ifdef _WIN32
static char *get_password(HANDLE Hdl, char *buffer, DWORD length)
#else
static char *get_password(FILE *file, char *buffer, int length)
#endif
{
char inChar;
int CharsProcessed= 1;
#ifdef _WIN32
DWORD Offset= 0;
#else
int Offset= 0;
#endif
memset(buffer, 0, length);
do
{
#ifdef _WIN32
if (!ReadConsole(Hdl, &inChar, 1, &CharsProcessed, NULL) ||
!CharsProcessed)
break;
#else
inChar= fgetc(file);
#endif
switch(inChar) {
case '\b': /* backslash */
if (Offset)
{
/* cursor is always at the end */
Offset--;
buffer[Offset]= 0;
#ifdef _WIN32
_cputs("\b \b");
#endif
}
break;
case '\n':
case '\r':
break;
default:
buffer[Offset]= inChar;
if (Offset < length - 2)
Offset++;
#ifdef _WIN32
_cputs("*");
#endif
break;
}
} while (CharsProcessed && inChar != '\n' && inChar != '\r');
return buffer;
}
/* }}} */
/* {{{ static char* get_tty_password */
/*
reads password from tty/console
SYNOPSIS
get_tty_password()
buffer input buffer
length length of input buffer
DESCRIPTION
reads a password from console (Windows) or tty without echoing
it's characters. Input buffer must be allocated by calling function.
RETURNS
buffer pointer to input buffer
*/
char* get_tty_password(char *prompt, char *buffer, int length)
{
#ifdef _WIN32
DWORD SaveState;
HANDLE Hdl;
int Offset= 0;
DWORD CharsProcessed= 0;
if (prompt)
fprintf(stderr, "%s", prompt);
if (!(Hdl= CreateFile("CONIN$",
GENERIC_READ | GENERIC_WRITE,
FILE_SHARE_READ,
NULL,
OPEN_EXISTING, 0, NULL)))
{
/* todo: provide a graphical dialog */
return buffer;
}
/* Save ConsoleMode and set ENABLE_PROCESSED_INPUT:
CTRL+C is processed by the system and is not placed in the input buffer */
GetConsoleMode(Hdl, &SaveState);
SetConsoleMode(Hdl, ENABLE_PROCESSED_INPUT);
buffer= get_password(Hdl, buffer, length);
SetConsoleMode(Hdl, SaveState);
CloseHandle(Hdl);
return buffer;
#else
struct termios term_old,
term_new;
FILE *readfrom;
if (prompt && isatty(fileno(stderr)))
fputs(prompt, stderr);
if (!(readfrom= fopen("/dev/tty", "r")))
readfrom= stdin;
/* try to disable echo */
tcgetattr(fileno(readfrom), &term_old);
term_new= term_old;
term_new.c_cc[VMIN] = 1;
term_new.c_cc[VTIME]= 0;
term_new.c_lflag&= ~(ECHO | ISIG | ICANON | ECHONL);
tcsetattr(fileno(readfrom), TCSADRAIN, &term_new);
buffer= get_password(readfrom, buffer, length);
if (isatty(fileno(readfrom)))
tcsetattr(fileno(readfrom), TCSADRAIN, &term_old);
fclose(readfrom);
return buffer;
#endif
}
/* }}} */
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