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![Werner Koch](/assets/img/avatar_default.png)
We better do this once and for all instead of cluttering all future commits with diffs of trailing white spaces. In the majority of cases blank or single lines are affected and thus this change won't disturb a git blame too much. For future commits the pre-commit scripts checks that this won't happen again.
705 lines
16 KiB
C
705 lines
16 KiB
C
/* ttyio.c - tty i/O functions
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* Copyright (C) 1998,1999,2000,2001,2002,2003,2004,2006,2007,
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* 2009, 2010 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 3 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, see <http://www.gnu.org/licenses/>.
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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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#if defined(HAVE_W32_SYSTEM) && !defined(HAVE_W32CE_SYSTEM)
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# define USE_W32_CONSOLE 1
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#endif
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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 USE_W32_CONSOLE
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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 "ttyio.h"
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#include "common-defs.h"
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#define CONTROL_D ('D' - 'A' + 1)
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#ifdef USE_W32_CONSOLE
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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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/* Hooks set by gpgrlhelp.c if required. */
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static void (*my_rl_set_completer) (rl_completion_func_t *);
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static void (*my_rl_inhibit_completion) (int);
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static void (*my_rl_cleanup_after_signal) (void);
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static void (*my_rl_init_stream) (FILE *);
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static char *(*my_rl_readline) (const char*);
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static void (*my_rl_add_history) (const char*);
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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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/* Note that despite our checks for these macros the function is
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not necessarily thread save. We mainly do this for
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portability reasons, in case L_ctermid is not defined. */
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# if defined(_POSIX_THREAD_SAFE_FUNCTIONS) || defined(_POSIX_TRHEADS)
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char buffer[L_ctermid];
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s = ctermid (buffer);
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# else
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s = ctermid (NULL);
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# endif
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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 /*HAVE_CTERMID*/
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/* Assume the standard tty on memory error or when tehre is no
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ctermid. */
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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(USE_W32_CONSOLE)
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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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if (my_rl_init_stream)
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my_rl_init_stream (ttyfp);
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#elif defined (HAVE_W32CE_SYSTEM)
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ttyfp = stderr;
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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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if (my_rl_init_stream)
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my_rl_init_stream (ttyfp);
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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 USE_W32_CONSOLE
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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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/* Same as tty_printf but if FP is not NULL, behave like a regular
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fprintf. */
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void
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tty_fprintf (estream_t fp, const char *fmt, ... )
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{
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va_list arg_ptr;
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if (fp)
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{
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va_start (arg_ptr, fmt) ;
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es_vfprintf (fp, fmt, arg_ptr );
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va_end (arg_ptr);
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return;
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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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va_start (arg_ptr, fmt);
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#ifdef USE_W32_CONSOLE
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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 ( const 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 USE_W32_CONSOLE
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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( const 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( (const char *)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( const 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 USE_W32_CONSOLE
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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__) || defined(HAVE_W32CE_SYSTEM)
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do {
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#ifdef HAVE_W32CE_SYSTEM
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/* Using getchar is not a correct solution but for now it
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doesn't matter becuase we have no real console at all. We
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should rework this as soon as we have switched this entire
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module to estream. */
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c = getchar();
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#else
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c = riscos_getchar();
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#endif
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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 /* Other systems. */
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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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}
|
|
|
|
|
|
char *
|
|
tty_get( const char *prompt )
|
|
{
|
|
if (!batchmode && !no_terminal && my_rl_readline && my_rl_add_history)
|
|
{
|
|
char *line;
|
|
char *buf;
|
|
|
|
if (!initialized)
|
|
init_ttyfp();
|
|
|
|
last_prompt_len = 0;
|
|
|
|
line = my_rl_readline (prompt?prompt:"");
|
|
|
|
/* We need to copy it to memory controlled by our malloc
|
|
implementations; further we need to convert an EOF to our
|
|
convention. */
|
|
buf = xmalloc(line? strlen(line)+1:2);
|
|
if (line)
|
|
{
|
|
strcpy (buf, line);
|
|
trim_spaces (buf);
|
|
if (strlen (buf) > 2 )
|
|
my_rl_add_history (line); /* Note that we test BUF but add LINE. */
|
|
free (line);
|
|
}
|
|
else
|
|
{
|
|
buf[0] = CONTROL_D;
|
|
buf[1] = 0;
|
|
}
|
|
return buf;
|
|
}
|
|
else
|
|
return do_get ( prompt, 0 );
|
|
}
|
|
|
|
/* Variable argument version of tty_get. The prompt is is actually a
|
|
format string with arguments. */
|
|
char *
|
|
tty_getf (const char *promptfmt, ... )
|
|
{
|
|
va_list arg_ptr;
|
|
char *prompt;
|
|
char *answer;
|
|
|
|
va_start (arg_ptr, promptfmt);
|
|
if (estream_vasprintf (&prompt, promptfmt, arg_ptr) < 0)
|
|
log_fatal ("estream_vasprintf failed: %s\n", strerror (errno));
|
|
va_end (arg_ptr);
|
|
answer = tty_get (prompt);
|
|
xfree (prompt);
|
|
return answer;
|
|
}
|
|
|
|
|
|
|
|
char *
|
|
tty_get_hidden( const char *prompt )
|
|
{
|
|
return do_get( prompt, 1 );
|
|
}
|
|
|
|
|
|
void
|
|
tty_kill_prompt()
|
|
{
|
|
if ( no_terminal )
|
|
return;
|
|
|
|
if( !initialized )
|
|
init_ttyfp();
|
|
|
|
if( batchmode )
|
|
last_prompt_len = 0;
|
|
if( !last_prompt_len )
|
|
return;
|
|
#ifdef USE_W32_CONSOLE
|
|
tty_printf("\r%*s\r", last_prompt_len, "");
|
|
#else
|
|
{
|
|
int i;
|
|
putc('\r', ttyfp);
|
|
for(i=0; i < last_prompt_len; i ++ )
|
|
putc(' ', ttyfp);
|
|
putc('\r', ttyfp);
|
|
fflush(ttyfp);
|
|
}
|
|
#endif
|
|
last_prompt_len = 0;
|
|
}
|
|
|
|
|
|
int
|
|
tty_get_answer_is_yes( const char *prompt )
|
|
{
|
|
int yes;
|
|
char *p = tty_get( prompt );
|
|
tty_kill_prompt();
|
|
yes = answer_is_yes(p);
|
|
xfree(p);
|
|
return yes;
|
|
}
|
|
|
|
|
|
/* Called by gnupg_rl_initialize to setup the readline support. */
|
|
void
|
|
tty_private_set_rl_hooks (void (*init_stream) (FILE *),
|
|
void (*set_completer) (rl_completion_func_t*),
|
|
void (*inhibit_completion) (int),
|
|
void (*cleanup_after_signal) (void),
|
|
char *(*readline_fun) (const char*),
|
|
void (*add_history_fun) (const char*))
|
|
{
|
|
my_rl_init_stream = init_stream;
|
|
my_rl_set_completer = set_completer;
|
|
my_rl_inhibit_completion = inhibit_completion;
|
|
my_rl_cleanup_after_signal = cleanup_after_signal;
|
|
my_rl_readline = readline_fun;
|
|
my_rl_add_history = add_history_fun;
|
|
}
|
|
|
|
|
|
#ifdef HAVE_LIBREADLINE
|
|
void
|
|
tty_enable_completion (rl_completion_func_t *completer)
|
|
{
|
|
if (no_terminal || !my_rl_set_completer )
|
|
return;
|
|
|
|
if (!initialized)
|
|
init_ttyfp();
|
|
|
|
my_rl_set_completer (completer);
|
|
}
|
|
|
|
void
|
|
tty_disable_completion (void)
|
|
{
|
|
if (no_terminal || !my_rl_inhibit_completion)
|
|
return;
|
|
|
|
if (!initialized)
|
|
init_ttyfp();
|
|
|
|
my_rl_inhibit_completion (1);
|
|
}
|
|
#endif
|
|
|
|
void
|
|
tty_cleanup_after_signal (void)
|
|
{
|
|
#ifdef HAVE_TCGETATTR
|
|
cleanup ();
|
|
#endif
|
|
}
|
|
|
|
void
|
|
tty_cleanup_rl_after_signal (void)
|
|
{
|
|
if (my_rl_cleanup_after_signal)
|
|
my_rl_cleanup_after_signal ();
|
|
}
|