Branch data     Line data    Source code

       1                 :            : /* $OpenBSD: sshtty.c,v 1.14 2010/01/09 05:04:24 djm Exp $ */
       2                 :            : /*
       3                 :            :  * Author: Tatu Ylonen <ylo@cs.hut.fi>
       4                 :            :  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
       5                 :            :  *                    All rights reserved
       6                 :            :  *
       7                 :            :  * As far as I am concerned, the code I have written for this software
       8                 :            :  * can be used freely for any purpose.  Any derived versions of this
       9                 :            :  * software must be clearly marked as such, and if the derived work is
      10                 :            :  * incompatible with the protocol description in the RFC file, it must be
      11                 :            :  * called by a name other than "ssh" or "Secure Shell".
      12                 :            :  */
      13                 :            : /*
      14                 :            :  * Copyright (c) 2001 Markus Friedl.  All rights reserved.
      15                 :            :  * Copyright (c) 2001 Kevin Steves.  All rights reserved.
      16                 :            :  *
      17                 :            :  * Redistribution and use in source and binary forms, with or without
      18                 :            :  * modification, are permitted provided that the following conditions
      19                 :            :  * are met:
      20                 :            :  * 1. Redistributions of source code must retain the above copyright
      21                 :            :  *    notice, this list of conditions and the following disclaimer.
      22                 :            :  * 2. Redistributions in binary form must reproduce the above copyright
      23                 :            :  *    notice, this list of conditions and the following disclaimer in the
      24                 :            :  *    documentation and/or other materials provided with the distribution.
      25                 :            :  *
      26                 :            :  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
      27                 :            :  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
      28                 :            :  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
      29                 :            :  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
      30                 :            :  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
      31                 :            :  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
      32                 :            :  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
      33                 :            :  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
      34                 :            :  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
      35                 :            :  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
      36                 :            :  */
      37                 :            : 
      38                 :            : #include "includes.h"
      39                 :            : 
      40                 :            : #include <sys/types.h>
      41                 :            : #include <stdio.h>
      42                 :            : #include <termios.h>
      43                 :            : #include <pwd.h>
      44                 :            : 
      45                 :            : #include "sshpty.h"
      46                 :            : 
      47                 :            : static struct termios _saved_tio;
      48                 :            : static int _in_raw_mode = 0;
      49                 :            : 
      50                 :            : struct termios *
      51                 :          0 : get_saved_tio(void)
      52                 :            : {
      53         [ #  # ]:          0 :         return _in_raw_mode ? &_saved_tio : NULL;
      54                 :            : }
      55                 :            : 
      56                 :            : void
      57                 :        686 : leave_raw_mode(int quiet)
      58                 :            : {
      59         [ -  + ]:        686 :         if (!_in_raw_mode)
      60                 :        686 :                 return;
      61         [ #  # ]:          0 :         if (tcsetattr(fileno(stdin), TCSADRAIN, &_saved_tio) == -1) {
      62         [ #  # ]:          0 :                 if (!quiet)
      63                 :          0 :                         perror("tcsetattr");
      64                 :            :         } else
      65                 :          0 :                 _in_raw_mode = 0;
      66                 :            : }
      67                 :            : 
      68                 :            : void
      69                 :          0 : enter_raw_mode(int quiet)
      70                 :            : {
      71                 :            :         struct termios tio;
      72                 :            : 
      73         [ #  # ]:          0 :         if (tcgetattr(fileno(stdin), &tio) == -1) {
      74         [ #  # ]:          0 :                 if (!quiet)
      75                 :          0 :                         perror("tcgetattr");
      76                 :          0 :                 return;
      77                 :            :         }
      78                 :          0 :         _saved_tio = tio;
      79                 :          0 :         tio.c_iflag |= IGNPAR;
      80                 :          0 :         tio.c_iflag &= ~(ISTRIP | INLCR | IGNCR | ICRNL | IXON | IXANY | IXOFF);
      81                 :            : #ifdef IUCLC
      82                 :          0 :         tio.c_iflag &= ~IUCLC;
      83                 :            : #endif
      84                 :          0 :         tio.c_lflag &= ~(ISIG | ICANON | ECHO | ECHOE | ECHOK | ECHONL);
      85                 :            : #ifdef IEXTEN
      86                 :          0 :         tio.c_lflag &= ~IEXTEN;
      87                 :            : #endif
      88                 :          0 :         tio.c_oflag &= ~OPOST;
      89                 :          0 :         tio.c_cc[VMIN] = 1;
      90                 :          0 :         tio.c_cc[VTIME] = 0;
      91         [ #  # ]:          0 :         if (tcsetattr(fileno(stdin), TCSADRAIN, &tio) == -1) {
      92         [ #  # ]:          0 :                 if (!quiet)
      93                 :          0 :                         perror("tcsetattr");
      94                 :            :         } else
      95                 :          0 :                 _in_raw_mode = 1;
      96                 :            : }