text: /* crypto/ui/ui_openssl.c -*- mode:C; c-file-style: "eay" -*- */
  /* Written by Richard Levitte (richard@levitte.org) and others
   * for the OpenSSL project 2001.
   */
  /* ====================================================================
   * Copyright (c) 2001 The OpenSSL Project.  All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer. 
   *
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in
   *    the documentation and/or other materials provided with the
   *    distribution.
   *
   * 3. All advertising materials mentioning features or use of this
   *    software must display the following acknowledgment:
   *    "This product includes software developed by the OpenSSL Project
   *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
   *
   * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
   *    endorse or promote products derived from this software without
   *    prior written permission. For written permission, please contact
   *    openssl-core@openssl.org.
   *
   * 5. Products derived from this software may not be called "OpenSSL"
   *    nor may "OpenSSL" appear in their names without prior written
   *    permission of the OpenSSL Project.
   *
   * 6. Redistributions of any form whatsoever must retain the following
   *    acknowledgment:
   *    "This product includes software developed by the OpenSSL Project
   *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
   *
   * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
   * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
   * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
   * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
   * OF THE POSSIBILITY OF SUCH DAMAGE.
   * ====================================================================
   *
   * This product includes cryptographic software written by Eric Young
   * (eay@cryptsoft.com).  This product includes software written by Tim
   * Hudson (tjh@cryptsoft.com).
   *
   */
  
  /* The lowest level part of this file was previously in crypto/des/read_pwd.c,
   * Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   * All rights reserved.
   *
   * This package is an SSL implementation written
   * by Eric Young (eay@cryptsoft.com).
   * The implementation was written so as to conform with Netscapes SSL.
   * 
   * This library is free for commercial and non-commercial use as long as
   * the following conditions are aheared to.  The following conditions
   * apply to all code found in this distribution, be it the RC4, RSA,
   * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
   * included with this distribution is covered by the same copyright terms
   * except that the holder is Tim Hudson (tjh@cryptsoft.com).
   * 
   * Copyright remains Eric Young's, and as such any Copyright notices in
   * the code are not to be removed.
   * If this package is used in a product, Eric Young should be given attribution
   * as the author of the parts of the library used.
   * This can be in the form of a textual message at program startup or
   * in documentation (online or textual) provided with the package.
   * 
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   * 3. All advertising materials mentioning features or use of this software
   *    must display the following acknowledgement:
   *    "This product includes cryptographic software written by
   *     Eric Young (eay@cryptsoft.com)"
   *    The word 'cryptographic' can be left out if the rouines from the library
   *    being used are not cryptographic related :-).
   * 4. If you include any Windows specific code (or a derivative thereof) from 
   *    the apps directory (application code) you must include an acknowledgement:
   *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
   * 
   * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   * 
   * The licence and distribution terms for any publically available version or
   * derivative of this code cannot be changed.  i.e. this code cannot simply be
   * copied and put under another distribution licence
   * [including the GNU Public Licence.]
   */
  
  
  #include <openssl/e_os2.h>
  
  /* need for #define _POSIX_C_SOURCE arises whenever you pass -ansi to gcc
   * [maybe others?], because it masks interfaces not discussed in standard,
   * sigaction and fileno included. -pedantic would be more appropriate for
   * the intended purposes, but we can't prevent users from adding -ansi.
   */
  #define _POSIX_C_SOURCE 1
  #include <signal.h>
  #include <stdio.h>
  #include <string.h>
  #include <errno.h>
  
  #if !defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_VMS)
  # ifdef OPENSSL_UNISTD
  #  include OPENSSL_UNISTD
  # else
  #  include <unistd.h>
  # endif
  /* If unistd.h defines _POSIX_VERSION, we conclude that we
   * are on a POSIX system and have sigaction and termios. */
  # if defined(_POSIX_VERSION)
  
  #  define SIGACTION
  #  if !defined(TERMIOS) && !defined(TERMIO) && !defined(SGTTY)
  #   define TERMIOS
  #  endif
  
  # endif
  #endif
  
  #ifdef WIN16TTY
  # undef OPENSSL_SYS_WIN16
  # undef WIN16
  # undef _WINDOWS
  # include <graph.h>
  #endif
  
  /* 06-Apr-92 Luke Brennan    Support for VMS */
  #include "ui_locl.h"
  #include "cryptlib.h"
  
  #ifdef OPENSSL_SYS_VMS		/* prototypes for sys$whatever */
  # include <starlet.h>
  # ifdef __DECC
  #  pragma message disable DOLLARID
  # endif
  #endif
  
  #ifdef WIN_CONSOLE_BUG
  # include <windows.h>
  #ifndef OPENSSL_SYS_WINCE
  # include <wincon.h>
  #endif
  #endif
  
  
  /* There are 5 types of terminal interface supported,
   * TERMIO, TERMIOS, VMS, MSDOS and SGTTY
   */
  
  #if defined(__sgi) && !defined(TERMIOS)
  # define TERMIOS
  # undef  TERMIO
  # undef  SGTTY
  #endif
  
  #if defined(linux) && !defined(TERMIO)
  # undef  TERMIOS
  # define TERMIO
  # undef  SGTTY
  #endif
  
  #ifdef _LIBC
  # undef  TERMIOS
  # define TERMIO
  # undef  SGTTY
  #endif
  
  #if !defined(TERMIO) && !defined(TERMIOS) && !defined(OPENSSL_SYS_VMS) && !defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_MACINTOSH_CLASSIC) && !defined(MAC_OS_GUSI_SOURCE)
  # undef  TERMIOS
  # undef  TERMIO
  # define SGTTY
  #endif
  
  #if defined(OPENSSL_SYS_VXWORKS)
  #undef TERMIOS
  #undef TERMIO
  #undef SGTTY
  #endif
  
  #if defined(OPENSSL_SYS_NETWARE)
  #undef TERMIOS
  #undef TERMIO
  #undef SGTTY
  #endif
  
  #ifdef TERMIOS
  # include <termios.h>
  # define TTY_STRUCT		struct termios
  # define TTY_FLAGS		c_lflag
  # define TTY_get(tty,data)	tcgetattr(tty,data)
  # define TTY_set(tty,data)	tcsetattr(tty,TCSANOW,data)
  #endif
  
  #ifdef TERMIO
  # include <termio.h>
  # define TTY_STRUCT		struct termio
  # define TTY_FLAGS		c_lflag
  # define TTY_get(tty,data)	ioctl(tty,TCGETA,data)
  # define TTY_set(tty,data)	ioctl(tty,TCSETA,data)
  #endif
  
  #ifdef SGTTY
  # include <sgtty.h>
  # define TTY_STRUCT		struct sgttyb
  # define TTY_FLAGS		sg_flags
  # define TTY_get(tty,data)	ioctl(tty,TIOCGETP,data)
  # define TTY_set(tty,data)	ioctl(tty,TIOCSETP,data)
  #endif
  
  #if !defined(_LIBC) && !defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_VMS) && !defined(OPENSSL_SYS_MACINTOSH_CLASSIC) && !defined(OPENSSL_SYS_SUNOS)
  # include <sys/ioctl.h>
  #endif
  
  #ifdef OPENSSL_SYS_MSDOS
  # include <conio.h>
  #endif
  
  #ifdef OPENSSL_SYS_VMS
  # include <ssdef.h>
  # include <iodef.h>
  # include <ttdef.h>
  # include <descrip.h>
  struct IOSB {
  	short iosb$w_value;
  	short iosb$w_count;
  	long  iosb$l_info;
  	};
  #endif
  
  #ifdef OPENSSL_SYS_SUNOS
  	typedef int sig_atomic_t;
  #endif
  
  #if defined(OPENSSL_SYS_MACINTOSH_CLASSIC) || defined(MAC_OS_GUSI_SOURCE) || defined(OPENSSL_SYS_NETWARE)
  /*
   * This one needs work. As a matter of fact the code is unoperational
   * and this is only a trick to get it compiled.
   *					<appro@fy.chalmers.se>
   */
  # define TTY_STRUCT int
  #endif
  
  #ifndef NX509_SIG
  # define NX509_SIG 32
  #endif
  
  
  /* Define globals.  They are protected by a lock */
  #ifdef SIGACTION
  static struct sigaction savsig[NX509_SIG];
  #else
  static void (*savsig[NX509_SIG])(int );
  #endif
  
  #ifdef OPENSSL_SYS_VMS
  static struct IOSB iosb;
  static $DESCRIPTOR(terminal,"TT");
  static long tty_orig[3], tty_new[3]; /* XXX   Is there any guarantee that this will always suffice for the actual structures? */
  static long status;
  static unsigned short channel = 0;
  #else
  #if !defined(OPENSSL_SYS_MSDOS) || defined(__DJGPP__)
  static TTY_STRUCT tty_orig,tty_new;
  #endif
  #endif
  static FILE *tty_in, *tty_out;
  static int is_a_tty;
  
  /* Declare static functions */
  #if !defined(OPENSSL_SYS_WIN16) && !defined(OPENSSL_SYS_WINCE)
  static int read_till_nl(FILE *);
  static void recsig(int);
  static void pushsig(void);
  static void popsig(void);
  #endif
  #if defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_WIN16)
  static int noecho_fgets(char *buf, int size, FILE *tty);
  #endif
  static int read_string_inner(UI *ui, UI_STRING *uis, int echo, int strip_nl);
  
  static int read_string(UI *ui, UI_STRING *uis);
  static int write_string(UI *ui, UI_STRING *uis);
  
  static int open_console(UI *ui);
  static int echo_console(UI *ui);
  static int noecho_console(UI *ui);
  static int close_console(UI *ui);
  
  static UI_METHOD ui_openssl =
  	{
  	"OpenSSL default user interface",
  	open_console,
  	write_string,
  	NULL,			/* No flusher is needed for command lines */
  	read_string,
  	close_console,
  	NULL
  	};
  
  /* The method with all the built-in thingies */
  UI_METHOD *UI_OpenSSL(void)
  	{
  	return &ui_openssl;
  	}
  
  /* The following function makes sure that info and error strings are printed
     before any prompt. */
  static int write_string(UI *ui, UI_STRING *uis)
  	{
  	switch (UI_get_string_type(uis))
  		{
  	case UIT_ERROR:
  	case UIT_INFO:
  		fputs(UI_get0_output_string(uis), tty_out);
  		fflush(tty_out);
  		break;
  	default:
  		break;
  		}
  	return 1;
  	}
  
  static int read_string(UI *ui, UI_STRING *uis)
  	{
  	int ok = 0;
  
  	switch (UI_get_string_type(uis))
  		{
  	case UIT_BOOLEAN:
  		fputs(UI_get0_output_string(uis), tty_out);
  		fputs(UI_get0_action_string(uis), tty_out);
  		fflush(tty_out);
  		return read_string_inner(ui, uis,
  			UI_get_input_flags(uis) & UI_INPUT_FLAG_ECHO, 0);
  	case UIT_PROMPT:
  		fputs(UI_get0_output_string(uis), tty_out);
  		fflush(tty_out);
  		return read_string_inner(ui, uis,
  			UI_get_input_flags(uis) & UI_INPUT_FLAG_ECHO, 1);
  	case UIT_VERIFY:
  		fprintf(tty_out,"Verifying - %s",
  			UI_get0_output_string(uis));
  		fflush(tty_out);
  		if ((ok = read_string_inner(ui, uis,
  			UI_get_input_flags(uis) & UI_INPUT_FLAG_ECHO, 1)) <= 0)
  			return ok;
  		if (strcmp(UI_get0_result_string(uis),
  			UI_get0_test_string(uis)) != 0)
  			{
  			fprintf(tty_out,"Verify failure\n");
  			fflush(tty_out);
  			return 0;
  			}
  		break;
  	default:
  		break;
  		}
  	return 1;
  	}
  
  
  #if !defined(OPENSSL_SYS_WIN16) && !defined(OPENSSL_SYS_WINCE)
  /* Internal functions to read a string without echoing */
  static int read_till_nl(FILE *in)
  	{
  #define SIZE 4
  	char buf[SIZE+1];
  
  	do	{
  		if (!fgets(buf,SIZE,in))
  			return 0;
  		} while (strchr(buf,'\n') == NULL);
  	return 1;
  	}
  
  static volatile sig_atomic_t intr_signal;
  #endif
  
  static int read_string_inner(UI *ui, UI_STRING *uis, int echo, int strip_nl)
  	{
  	static int ps;
  	int ok;
  	char result[BUFSIZ];
  	int maxsize = BUFSIZ-1;
  #if !defined(OPENSSL_SYS_WIN16) && !defined(OPENSSL_SYS_WINCE)
  	char *p;
  
  	intr_signal=0;
  	ok=0;
  	ps=0;
  
  	pushsig();
  	ps=1;
  
  	if (!echo && !noecho_console(ui))
  		goto error;
  	ps=2;
  
  	result[0]='\0';
  #ifdef OPENSSL_SYS_MSDOS
  	if (!echo)
  		{
  		noecho_fgets(result,maxsize,tty_in);
  		p=result; /* FIXME: noecho_fgets doesn't return errors */
  		}
  	else
  		p=fgets(result,maxsize,tty_in);
  #else
  	p=fgets(result,maxsize,tty_in);
  #endif
  	if(!p)
  		goto error;
  	if (feof(tty_in)) goto error;
  	if (ferror(tty_in)) goto error;
  	if ((p=(char *)strchr(result,'\n')) != NULL)
  		{
  		if (strip_nl)
  			*p='\0';
  		}
  	else
  		if (!read_till_nl(tty_in))
  			goto error;
  	if (UI_set_result(ui, uis, result) >= 0)
  		ok=1;
  
  error:
  	if (intr_signal == SIGINT)
  		ok=-1;
  	if (!echo) fprintf(tty_out,"\n");
  	if (ps >= 2 && !echo && !echo_console(ui))
  		ok=0;
  
  	if (ps >= 1)
  		popsig();
  #else
  	ok=1;
  #endif
  
  	OPENSSL_cleanse(result,BUFSIZ);
  	return ok;
  	}
  
  
  /* Internal functions to open, handle and close a channel to the console.  */
  static int open_console(UI *ui)
  	{
  	CRYPTO_w_lock(CRYPTO_LOCK_UI);
  	is_a_tty = 1;
  
  #if defined(OPENSSL_SYS_MACINTOSH_CLASSIC) || defined(OPENSSL_SYS_VXWORKS) || defined(OPENSSL_SYS_NETWARE)
  	tty_in=stdin;
  	tty_out=stderr;
  #else
  #  ifdef OPENSSL_SYS_MSDOS
  #    define DEV_TTY "con"
  #  else
  #    define DEV_TTY "/dev/tty"
  #  endif
  	if ((tty_in=fopen(DEV_TTY,"r")) == NULL)
  		tty_in=stdin;
  	if ((tty_out=fopen(DEV_TTY,"w")) == NULL)
  		tty_out=stderr;
  #endif
  
  #if defined(TTY_get) && !defined(OPENSSL_SYS_VMS)
   	if (TTY_get(fileno(tty_in),&tty_orig) == -1)
  		{
  #ifdef ENOTTY
  		if (errno == ENOTTY)
  			is_a_tty=0;
  		else
  #endif
  #ifdef EINVAL
  		/* Ariel Glenn ariel@columbia.edu reports that solaris
  		 * can return EINVAL instead.  This should be ok */
  		if (errno == EINVAL)
  			is_a_tty=0;
  		else
  #endif
  			return 0;
  		}
  #endif
  #ifdef OPENSSL_SYS_VMS
  	status = sys$assign(&terminal,&channel,0,0);
  	if (status != SS$_NORMAL)
  		return 0;
  	status=sys$qiow(0,channel,IO$_SENSEMODE,&iosb,0,0,tty_orig,12,0,0,0,0);
  	if ((status != SS$_NORMAL) || (iosb.iosb$w_value != SS$_NORMAL))
  		return 0;
  #endif
  	return 1;
  	}
  
  static int noecho_console(UI *ui)
  	{
  #ifdef TTY_FLAGS
  	memcpy(&(tty_new),&(tty_orig),sizeof(tty_orig));
  	tty_new.TTY_FLAGS &= ~ECHO;
  #endif
  
  #if defined(TTY_set) && !defined(OPENSSL_SYS_VMS)
  	if (is_a_tty && (TTY_set(fileno(tty_in),&tty_new) == -1))
  		return 0;
  #endif
  #ifdef OPENSSL_SYS_VMS
  	tty_new[0] = tty_orig[0];
  	tty_new[1] = tty_orig[1] | TT$M_NOECHO;
  	tty_new[2] = tty_orig[2];
  	status = sys$qiow(0,channel,IO$_SETMODE,&iosb,0,0,tty_new,12,0,0,0,0);
  	if ((status != SS$_NORMAL) || (iosb.iosb$w_value != SS$_NORMAL))
  		return 0;
  #endif
  	return 1;
  	}
  
  static int echo_console(UI *ui)
  	{
  #if defined(TTY_set) && !defined(OPENSSL_SYS_VMS)
  	memcpy(&(tty_new),&(tty_orig),sizeof(tty_orig));
  	tty_new.TTY_FLAGS |= ECHO;
  #endif
  
  #if defined(TTY_set) && !defined(OPENSSL_SYS_VMS)
  	if (is_a_tty && (TTY_set(fileno(tty_in),&tty_new) == -1))
  		return 0;
  #endif
  #ifdef OPENSSL_SYS_VMS
  	tty_new[0] = tty_orig[0];
  	tty_new[1] = tty_orig[1] & ~TT$M_NOECHO;
  	tty_new[2] = tty_orig[2];
  	status = sys$qiow(0,channel,IO$_SETMODE,&iosb,0,0,tty_new,12,0,0,0,0);
  	if ((status != SS$_NORMAL) || (iosb.iosb$w_value != SS$_NORMAL))
  		return 0;
  #endif
  	return 1;
  	}
  
  static int close_console(UI *ui)
  	{
  	if (tty_in != stdin) fclose(tty_in);
  	if (tty_out != stderr) fclose(tty_out);
  #ifdef OPENSSL_SYS_VMS
  	status = sys$dassgn(channel);
  #endif
  	CRYPTO_w_unlock(CRYPTO_LOCK_UI);
  
  	return 1;
  	}
  
  
  #if !defined(OPENSSL_SYS_WIN16) && !defined(OPENSSL_SYS_WINCE)
  /* Internal functions to handle signals and act on them */
  static void pushsig(void)
  	{
  #ifndef OPENSSL_SYS_WIN32
  	int i;
  #endif
  #ifdef SIGACTION
  	struct sigaction sa;
  
  	memset(&sa,0,sizeof sa);
  	sa.sa_handler=recsig;
  #endif
  
  #ifdef OPENSSL_SYS_WIN32
  	savsig[SIGABRT]=signal(SIGABRT,recsig);
  	savsig[SIGFPE]=signal(SIGFPE,recsig);
  	savsig[SIGILL]=signal(SIGILL,recsig);
  	savsig[SIGINT]=signal(SIGINT,recsig);
  	savsig[SIGSEGV]=signal(SIGSEGV,recsig);
  	savsig[SIGTERM]=signal(SIGTERM,recsig);
  #else
  	for (i=1; i<NX509_SIG; i++)
  		{
  #ifdef SIGUSR1
  		if (i == SIGUSR1)
  			continue;
  #endif
  #ifdef SIGUSR2
  		if (i == SIGUSR2)
  			continue;
  #endif
  #ifdef SIGKILL
  		if (i == SIGKILL) /* We can't make any action on that. */
  			continue;
  #endif
  #ifdef SIGACTION
  		sigaction(i,&sa,&savsig[i]);
  #else
  		savsig[i]=signal(i,recsig);
  #endif
  		}
  #endif
  
  #ifdef SIGWINCH
  	signal(SIGWINCH,SIG_DFL);
  #endif
  	}
  
  static void popsig(void)
  	{
  #ifdef OPENSSL_SYS_WIN32
  	signal(SIGABRT,savsig[SIGABRT]);
  	signal(SIGFPE,savsig[SIGFPE]);
  	signal(SIGILL,savsig[SIGILL]);
  	signal(SIGINT,savsig[SIGINT]);
  	signal(SIGSEGV,savsig[SIGSEGV]);
  	signal(SIGTERM,savsig[SIGTERM]);
  #else
  	int i;
  	for (i=1; i<NX509_SIG; i++)
  		{
  #ifdef SIGUSR1
  		if (i == SIGUSR1)
  			continue;
  #endif
  #ifdef SIGUSR2
  		if (i == SIGUSR2)
  			continue;
  #endif
  #ifdef SIGACTION
  		sigaction(i,&savsig[i],NULL);
  #else
  		signal(i,savsig[i]);
  #endif
  		}
  #endif
  	}
  
  static void recsig(int i)
  	{
  	intr_signal=i;
  	}
  #endif
  
  /* Internal functions specific for Windows */
  #if defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_WIN16) && !defined(OPENSSL_SYS_WINCE)
  static int noecho_fgets(char *buf, int size, FILE *tty)
  	{
  	int i;
  	char *p;
  
  	p=buf;
  	for (;;)
  		{
  		if (size == 0)
  			{
  			*p='\0';
  			break;
  			}
  		size--;
  #ifdef WIN16TTY
  		i=_inchar();
  #elif defined(_WIN32)
  		i=_getch();
  #else
  		i=getch();
  #endif
  		if (i == '\r') i='\n';
  		*(p++)=i;
  		if (i == '\n')
  			{
  			*p='\0';
  			break;
  			}
  		}
  #ifdef WIN_CONSOLE_BUG
  /* Win95 has several evil console bugs: one of these is that the
   * last character read using getch() is passed to the next read: this is
   * usually a CR so this can be trouble. No STDIO fix seems to work but
   * flushing the console appears to do the trick.
   */
  		{
  			HANDLE inh;
  			inh = GetStdHandle(STD_INPUT_HANDLE);
  			FlushConsoleInputBuffer(inh);
  		}
  #endif
  	return(strlen(buf));
  	}
  #endif
  