File: get_password.c

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/* Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved.

   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.

   There are special exceptions to the terms and conditions of the GPL as it
   is applied to this software.

   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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA */

/*
** Ask for a password from tty
** This is an own file to avoid conflicts with curses
*/
#include <my_global.h>
#include <my_sys.h>
#include "mysql.h"
#include <m_string.h>
#include <m_ctype.h>

#if defined(HAVE_BROKEN_GETPASS) && !defined(HAVE_GETPASSPHRASE)
#undef HAVE_GETPASS
#endif

#ifdef HAVE_GETPASS
#ifdef HAVE_PWD_H
#include <pwd.h>
#endif /* HAVE_PWD_H */
#else /* ! HAVE_GETPASS */
#if !defined(__WIN__) && !defined(__NETWARE__)
#include <sys/ioctl.h>
#ifdef HAVE_TERMIOS_H				/* For tty-password */
#include	<termios.h>
#define TERMIO	struct termios
#else
#ifdef HAVE_TERMIO_H				/* For tty-password */
#include	<termio.h>
#define TERMIO	struct termio
#else
#include	<sgtty.h>
#define TERMIO	struct sgttyb
#endif
#endif
#ifdef alpha_linux_port
#include <asm/ioctls.h>				/* QQ; Fix this in configure */
#include <asm/termiobits.h>
#endif
#else
#ifndef __NETWARE__
#include <conio.h>
#endif /* __NETWARE__ */
#endif /* __WIN__ */
#endif /* HAVE_GETPASS */

#ifdef HAVE_GETPASSPHRASE			/* For Solaris */
#define getpass(A) getpassphrase(A)
#endif

#if defined( __WIN__) || defined(__NETWARE__)
/* were just going to fake it here and get input from the keyboard */

#ifdef __NETWARE__
#undef _getch
#undef _cputs
#define _getch getcharacter
#define _cputs(A) putstring(A)
#endif

char *get_tty_password(const char *opt_message)
{
  char to[80];
  char *pos=to,*end=to+sizeof(to)-1;
  int i=0;
  DBUG_ENTER("get_tty_password");
  _cputs(opt_message ? opt_message : "Enter password: ");
  for (;;)
  {
    char tmp;
    tmp=_getch();
    if (tmp == '\b' || (int) tmp == 127)
    {
      if (pos != to)
      {
	_cputs("\b \b");
	pos--;
	continue;
      }
    }
    if (tmp == '\n' || tmp == '\r' || tmp == 3)
      break;
    if (iscntrl(tmp) || pos == end)
      continue;
    _cputs("*");
    *(pos++) = tmp;
  }
  while (pos != to && isspace(pos[-1]) == ' ')
    pos--;					/* Allow dummy space at end */
  *pos=0;
  _cputs("\n");
  DBUG_RETURN(my_strdup(to,MYF(MY_FAE)));
}

#else

#ifndef HAVE_GETPASS
/*
  Can't use fgets, because readline will get confused
  length is max number of chars in to, not counting \0
  to will not include the eol characters.
*/

static void get_password(char *to,uint length,int fd, my_bool echo)
{
  char *pos=to,*end=to+length;

  for (;;)
  {
    char tmp;
    if (my_read(fd,&tmp,1,MYF(0)) != 1)
      break;
    if (tmp == '\b' || (int) tmp == 127)
    {
      if (pos != to)
      {
	if (echo)
	{
	  fputs("\b \b",stdout);
	  fflush(stdout);
	}
	pos--;
	continue;
      }
    }
    if (tmp == '\n' || tmp == '\r' || tmp == 3)
      break;
    if (iscntrl(tmp) || pos == end)
      continue;
    if (echo)
    {
      fputc('*',stdout);
      fflush(stdout);
    }
    *(pos++) = tmp;
  }
  while (pos != to && isspace(pos[-1]) == ' ')
    pos--;					/* Allow dummy space at end */
  *pos=0;
  return;
}
#endif /* ! HAVE_GETPASS */


char *get_tty_password(const char *opt_message)
{
#ifdef HAVE_GETPASS
  char *passbuff;
#else /* ! HAVE_GETPASS */
  TERMIO org,tmp;
#endif /* HAVE_GETPASS */
  char buff[80];

  DBUG_ENTER("get_tty_password");

#ifdef HAVE_GETPASS
  passbuff = getpass(opt_message ? opt_message : "Enter password: ");

  /* copy the password to buff and clear original (static) buffer */
  strnmov(buff, passbuff, sizeof(buff) - 1);
#ifdef _PASSWORD_LEN
  memset(passbuff, 0, _PASSWORD_LEN);
#endif
#else 
  if (isatty(fileno(stdout)))
  {
    fputs(opt_message ? opt_message : "Enter password: ",stdout);
    fflush(stdout);
  }
#if defined(HAVE_TERMIOS_H)
  tcgetattr(fileno(stdin), &org);
  tmp = org;
  tmp.c_lflag &= ~(ECHO | ISIG | ICANON);
  tmp.c_cc[VMIN] = 1;
  tmp.c_cc[VTIME] = 0;
  tcsetattr(fileno(stdin), TCSADRAIN, &tmp);
  get_password(buff, sizeof(buff)-1, fileno(stdin), isatty(fileno(stdout)));
  tcsetattr(fileno(stdin), TCSADRAIN, &org);
#elif defined(HAVE_TERMIO_H)
  ioctl(fileno(stdin), (int) TCGETA, &org);
  tmp=org;
  tmp.c_lflag &= ~(ECHO | ISIG | ICANON);
  tmp.c_cc[VMIN] = 1;
  tmp.c_cc[VTIME]= 0;
  ioctl(fileno(stdin),(int) TCSETA, &tmp);
  get_password(buff,sizeof(buff)-1,fileno(stdin),isatty(fileno(stdout)));
  ioctl(fileno(stdin),(int) TCSETA, &org);
#else
  gtty(fileno(stdin), &org);
  tmp=org;
  tmp.sg_flags &= ~ECHO;
  tmp.sg_flags |= RAW;
  stty(fileno(stdin), &tmp);
  get_password(buff,sizeof(buff)-1,fileno(stdin),isatty(fileno(stdout)));
  stty(fileno(stdin), &org);
#endif
  if (isatty(fileno(stdout)))
    fputc('\n',stdout);
#endif /* HAVE_GETPASS */

  DBUG_RETURN(my_strdup(buff,MYF(MY_FAE)));
}
#endif /*__WIN__*/