mirror of git://git.gnupg.org/gnupg.git
509 lines
11 KiB
C
509 lines
11 KiB
C
/* ttyio.c - tty i/O functions
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* Copyright (C) 1998,1999,2000,2001,2002,2003 Free Software Foundation, Inc.
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*
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* This file is part of GnuPG.
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*
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* GnuPG is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* GnuPG is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*/
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#include <config.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdarg.h>
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#include <unistd.h>
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#ifdef HAVE_TCGETATTR
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#include <termios.h>
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#else
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#ifdef HAVE_TERMIO_H
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/* simulate termios with termio */
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#include <termio.h>
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#define termios termio
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#define tcsetattr ioctl
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#define TCSAFLUSH TCSETAF
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#define tcgetattr(A,B) ioctl(A,TCGETA,B)
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#define HAVE_TCGETATTR
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#endif
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#endif
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#ifdef __MINGW32__ /* use the odd Win32 functions */
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#include <windows.h>
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#ifdef HAVE_TCGETATTR
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#error mingw32 and termios
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#endif
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#endif
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#include <errno.h>
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#include <ctype.h>
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#include "util.h"
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#include "memory.h"
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#include "ttyio.h"
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#define CONTROL_D ('D' - 'A' + 1)
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#ifdef __MINGW32__ /* use the odd Win32 functions */
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static struct {
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HANDLE in, out;
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} con;
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#define DEF_INPMODE (ENABLE_LINE_INPUT|ENABLE_ECHO_INPUT \
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|ENABLE_PROCESSED_INPUT )
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#define HID_INPMODE (ENABLE_LINE_INPUT|ENABLE_PROCESSED_INPUT )
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#define DEF_OUTMODE (ENABLE_WRAP_AT_EOL_OUTPUT|ENABLE_PROCESSED_OUTPUT)
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#else /* yeah, we have a real OS */
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static FILE *ttyfp = NULL;
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#endif
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static int initialized;
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static int last_prompt_len;
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static int batchmode;
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static int no_terminal;
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#ifdef HAVE_TCGETATTR
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static struct termios termsave;
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static int restore_termios;
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#endif
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/* This is a wrapper around ttyname so that we can use it even when
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the standard streams are redirected. It figures the name out the
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first time and returns it in a statically allocated buffer. */
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const char *
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tty_get_ttyname (void)
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{
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static char *name;
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/* On a GNU system ctermid() always return /dev/tty, so this does
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not make much sense - however if it is ever changed we do the
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Right Thing now. */
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#ifdef HAVE_CTERMID
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static int got_name;
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if (!got_name)
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{
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const char *s;
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s = ctermid (NULL);
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if (s)
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name = strdup (s);
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got_name = 1;
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}
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#endif
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/* Assume the staandrd tty on memory error or when tehre is no
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certmid. */
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return name? name : "/dev/tty";
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}
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#ifdef HAVE_TCGETATTR
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static void
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cleanup(void)
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{
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if( restore_termios ) {
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restore_termios = 0; /* do it prios in case it is interrupted again */
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if( tcsetattr(fileno(ttyfp), TCSAFLUSH, &termsave) )
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log_error("tcsetattr() failed: %s\n", strerror(errno) );
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}
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}
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#endif
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static void
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init_ttyfp(void)
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{
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if( initialized )
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return;
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#if defined(__MINGW32__)
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{
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SECURITY_ATTRIBUTES sa;
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memset(&sa, 0, sizeof(sa));
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sa.nLength = sizeof(sa);
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sa.bInheritHandle = TRUE;
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con.out = CreateFileA( "CONOUT$", GENERIC_READ|GENERIC_WRITE,
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FILE_SHARE_READ|FILE_SHARE_WRITE,
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&sa, OPEN_EXISTING, 0, 0 );
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if( con.out == INVALID_HANDLE_VALUE )
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log_fatal("open(CONOUT$) failed: rc=%d", (int)GetLastError() );
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memset(&sa, 0, sizeof(sa));
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sa.nLength = sizeof(sa);
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sa.bInheritHandle = TRUE;
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con.in = CreateFileA( "CONIN$", GENERIC_READ|GENERIC_WRITE,
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FILE_SHARE_READ|FILE_SHARE_WRITE,
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&sa, OPEN_EXISTING, 0, 0 );
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if( con.in == INVALID_HANDLE_VALUE )
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log_fatal("open(CONIN$) failed: rc=%d", (int)GetLastError() );
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}
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SetConsoleMode(con.in, DEF_INPMODE );
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SetConsoleMode(con.out, DEF_OUTMODE );
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#elif defined(__EMX__)
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ttyfp = stdout; /* Fixme: replace by the real functions: see wklib */
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#else
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ttyfp = batchmode? stderr : fopen (tty_get_ttyname (), "r+");
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if( !ttyfp ) {
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log_error("cannot open `%s': %s\n", tty_get_ttyname (),
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strerror(errno) );
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exit(2);
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}
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#endif
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#ifdef HAVE_TCGETATTR
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atexit( cleanup );
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#endif
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initialized = 1;
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}
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int
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tty_batchmode( int onoff )
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{
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int old = batchmode;
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if( onoff != -1 )
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batchmode = onoff;
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return old;
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}
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int
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tty_no_terminal(int onoff)
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{
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int old = no_terminal;
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no_terminal = onoff ? 1 : 0;
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return old;
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}
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void
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tty_printf( const char *fmt, ... )
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{
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va_list arg_ptr;
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if (no_terminal)
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return;
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if( !initialized )
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init_ttyfp();
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va_start( arg_ptr, fmt ) ;
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#ifdef __MINGW32__
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{
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char *buf = NULL;
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int n;
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DWORD nwritten;
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n = vasprintf(&buf, fmt, arg_ptr);
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if( !buf )
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log_bug("vasprintf() failed\n");
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if( !WriteConsoleA( con.out, buf, n, &nwritten, NULL ) )
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log_fatal("WriteConsole failed: rc=%d", (int)GetLastError() );
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if( n != nwritten )
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log_fatal("WriteConsole failed: %d != %d\n", n, (int)nwritten );
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last_prompt_len += n;
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xfree (buf);
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}
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#else
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last_prompt_len += vfprintf(ttyfp,fmt,arg_ptr) ;
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fflush(ttyfp);
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#endif
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va_end(arg_ptr);
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}
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/****************
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* Print a string, but filter all control characters out.
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*/
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void
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tty_print_string( byte *p, size_t n )
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{
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if (no_terminal)
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return;
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if( !initialized )
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init_ttyfp();
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#ifdef __MINGW32__
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/* not so effective, change it if you want */
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for( ; n; n--, p++ )
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if( iscntrl( *p ) ) {
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if( *p == '\n' )
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tty_printf("\\n");
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else if( !*p )
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tty_printf("\\0");
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else
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tty_printf("\\x%02x", *p);
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}
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else
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tty_printf("%c", *p);
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#else
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for( ; n; n--, p++ )
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if( iscntrl( *p ) ) {
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putc('\\', ttyfp);
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if( *p == '\n' )
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putc('n', ttyfp);
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else if( !*p )
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putc('0', ttyfp);
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else
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fprintf(ttyfp, "x%02x", *p );
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}
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else
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putc(*p, ttyfp);
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#endif
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}
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void
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tty_print_utf8_string2( byte *p, size_t n, size_t max_n )
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{
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size_t i;
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char *buf;
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if (no_terminal)
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return;
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/* we can handle plain ascii simpler, so check for it first */
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for(i=0; i < n; i++ ) {
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if( p[i] & 0x80 )
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break;
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}
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if( i < n ) {
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buf = utf8_to_native( p, n, 0 );
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if( max_n && (strlen( buf ) > max_n )) {
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buf[max_n] = 0;
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}
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/*(utf8 conversion already does the control character quoting)*/
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tty_printf("%s", buf );
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xfree( buf );
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}
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else {
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if( max_n && (n > max_n) ) {
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n = max_n;
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}
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tty_print_string( p, n );
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}
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}
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void
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tty_print_utf8_string( byte *p, size_t n )
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{
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tty_print_utf8_string2( p, n, 0 );
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}
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static char *
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do_get( const char *prompt, int hidden )
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{
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char *buf;
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#ifndef __riscos__
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byte cbuf[1];
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#endif
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int c, n, i;
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if( batchmode ) {
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log_error("Sorry, we are in batchmode - can't get input\n");
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exit(2);
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}
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if (no_terminal) {
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log_error("Sorry, no terminal at all requested - can't get input\n");
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exit(2);
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}
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if( !initialized )
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init_ttyfp();
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last_prompt_len = 0;
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tty_printf( "%s", prompt );
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buf = xmalloc((n=50));
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i = 0;
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#ifdef __MINGW32__ /* windoze version */
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if( hidden )
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SetConsoleMode(con.in, HID_INPMODE );
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for(;;) {
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DWORD nread;
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if( !ReadConsoleA( con.in, cbuf, 1, &nread, NULL ) )
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log_fatal("ReadConsole failed: rc=%d", (int)GetLastError() );
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if( !nread )
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continue;
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if( *cbuf == '\n' )
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break;
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if( !hidden )
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last_prompt_len++;
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c = *cbuf;
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if( c == '\t' )
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c = ' ';
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else if( c > 0xa0 )
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; /* we don't allow 0xa0, as this is a protected blank which may
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* confuse the user */
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else if( iscntrl(c) )
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continue;
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if( !(i < n-1) ) {
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n += 50;
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buf = xrealloc (buf, n);
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}
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buf[i++] = c;
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}
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if( hidden )
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SetConsoleMode(con.in, DEF_INPMODE );
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#elif defined(__riscos__)
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do {
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c = riscos_getchar();
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if (c == 0xa || c == 0xd) { /* Return || Enter */
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c = (int) '\n';
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} else if (c == 0x8 || c == 0x7f) { /* Backspace || Delete */
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if (i>0) {
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i--;
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if (!hidden) {
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last_prompt_len--;
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fputc(8, ttyfp);
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fputc(32, ttyfp);
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fputc(8, ttyfp);
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fflush(ttyfp);
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}
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} else {
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fputc(7, ttyfp);
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fflush(ttyfp);
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}
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continue;
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} else if (c == (int) '\t') { /* Tab */
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c = ' ';
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} else if (c > 0xa0) {
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; /* we don't allow 0xa0, as this is a protected blank which may
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* confuse the user */
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} else if (iscntrl(c)) {
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continue;
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}
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if(!(i < n-1)) {
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n += 50;
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buf = xrealloc (buf, n);
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}
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buf[i++] = c;
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if (!hidden) {
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last_prompt_len++;
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fputc(c, ttyfp);
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fflush(ttyfp);
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}
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} while (c != '\n');
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i = (i>0) ? i-1 : 0;
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#else /* unix version */
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if( hidden ) {
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#ifdef HAVE_TCGETATTR
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struct termios term;
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if( tcgetattr(fileno(ttyfp), &termsave) )
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log_fatal("tcgetattr() failed: %s\n", strerror(errno) );
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restore_termios = 1;
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term = termsave;
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term.c_lflag &= ~(ECHO | ECHOE | ECHOK | ECHONL);
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if( tcsetattr( fileno(ttyfp), TCSAFLUSH, &term ) )
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log_fatal("tcsetattr() failed: %s\n", strerror(errno) );
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#endif
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}
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/* fixme: How can we avoid that the \n is echoed w/o disabling
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* canonical mode - w/o this kill_prompt can't work */
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while( read(fileno(ttyfp), cbuf, 1) == 1 && *cbuf != '\n' ) {
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if( !hidden )
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last_prompt_len++;
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c = *cbuf;
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if( c == CONTROL_D )
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log_info("control d found\n");
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if( c == '\t' )
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c = ' ';
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else if( c > 0xa0 )
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; /* we don't allow 0xa0, as this is a protected blank which may
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* confuse the user */
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else if( iscntrl(c) )
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continue;
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if( !(i < n-1) ) {
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n += 50;
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buf = xrealloc (buf, n );
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}
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buf[i++] = c;
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}
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if( *cbuf != '\n' ) {
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buf[0] = CONTROL_D;
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i = 1;
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}
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if( hidden ) {
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#ifdef HAVE_TCGETATTR
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if( tcsetattr(fileno(ttyfp), TCSAFLUSH, &termsave) )
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log_error("tcsetattr() failed: %s\n", strerror(errno) );
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restore_termios = 0;
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#endif
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}
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#endif /* end unix version */
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buf[i] = 0;
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return buf;
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}
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char *
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tty_get( const char *prompt )
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{
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return do_get( prompt, 0 );
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}
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char *
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tty_get_hidden( const char *prompt )
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{
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return do_get( prompt, 1 );
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}
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void
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tty_kill_prompt()
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{
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if ( no_terminal )
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return;
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if( !initialized )
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init_ttyfp();
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if( batchmode )
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last_prompt_len = 0;
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if( !last_prompt_len )
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return;
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#ifdef __MINGW32__
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tty_printf("\r%*s\r", last_prompt_len, "");
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#else
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{
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int i;
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putc('\r', ttyfp);
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for(i=0; i < last_prompt_len; i ++ )
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putc(' ', ttyfp);
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putc('\r', ttyfp);
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fflush(ttyfp);
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}
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#endif
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last_prompt_len = 0;
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}
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int
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tty_get_answer_is_yes( const char *prompt )
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{
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int yes;
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char *p = tty_get( prompt );
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tty_kill_prompt();
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yes = answer_is_yes(p);
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xfree(p);
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return yes;
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}
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