adtools/clib2

/*
 * $Id: termios_tcgetattr.c,v 1.3 2006-01-08 12:04:27 obarthel Exp $
 *
 * :ts=4
 *
 * Portable ISO 'C' (1994) runtime library for the Amiga computer
 * Copyright (c) 2002-2015 by Olaf Barthel <obarthel (at) gmx.net>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   - Neither the name of Olaf Barthel nor the names of contributors
 *     may be used to endorse or promote products derived from this
 *     software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT OWNER 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.
 */

#ifndef    _TERMIOS_HEADERS_H
#include "termios_headers.h"
#endif /* _TERMIOS_HEADERS_H */

/****************************************************************************/

static const cc_t def_console_cc[NCCS]=
{
    3,        /* VINTR    = ETX */
    28,        /* VQUIT    = FS  */
    127,    /* VERASE     = DEL */
    24,        /* VKILL    = DC4 */
    4,        /* VEOF        = EOT */
    1,        /* VMIN        = Minimum number of characters in a non-canonical read. */
    0,        /* VEOL        = NUL */
    0,        /* VTIME    = Timout in deciseconds for a non-canonical read. */
    17,        /* VSTART    = DC1 */
    19,        /* VSTOP    = DC3 */
    26,        /* VSUSP    = SUB */
    23        /* VWERASE    = ETB */
};

/******************************************************************/

static struct termios *
get_console_termios(struct fd *fd)
{
    struct termios *tios;

    /* Create a new, fresh termios. TODO: Actually query some values,
       e.g. ICANON and ECHO should not be set for RAW consoles. */
    tios = malloc(sizeof(*tios));
    if(tios == NULL)
    {
        __set_errno(ENOMEM);
        goto out;
    }

    memset(tios,0,sizeof(*tios));

    /* Set up the initial termios state. */
    tios->c_iflag = 0;
    tios->c_oflag = 0;
    tios->c_cflag = CS8|CLOCAL;

    if(FLAG_IS_SET(fd->fd_Flags,FDF_READ))
        SET_FLAG(tios->c_cflag,CREAD);

    tios->c_lflag = ISIG|ICANON|ECHO;

    memcpy(tios->c_cc,def_console_cc,NCCS);

    tios->c_ispeed = B9600;    /* A default as good as any? */
    tios->c_ospeed = B9600;

    tios->type = TIOST_CONSOLE;
    tios->flags = 0;

    /* Change the hook. */
    fd->fd_Action = __termios_console_hook;
    fd->fd_Aux = tios;

    SET_FLAG(fd->fd_Flags,FDF_TERMIOS);

 out:

    return(tios);
}

/******************************************************************/

struct termios *
__get_termios(struct fd *fd)
{
    struct termios *tios = NULL;

    if(FLAG_IS_SET(fd->fd_Flags,FDF_IS_SOCKET)) /* Network socket. Remote terminal? */
    {
        __set_errno(ENODEV);
        goto out;
    }

    if(FLAG_IS_CLEAR(fd->fd_Flags,FDF_IS_INTERACTIVE))
    {
        __set_errno(ENOTTY);
        goto out;
    }

    if(FLAG_IS_SET(fd->fd_Flags,FDF_TERMIOS))
        tios = fd->fd_Aux;
    else
        tios = get_console_termios(fd);

 out:

    return(tios);
}

/******************************************************************/

int
tcgetattr(int file_descriptor,struct termios *user_tios)
{
    int result = ERROR;
    struct fd *fd = NULL;
    struct termios *tios;

    __stdio_lock();

    if(user_tios == NULL)
    {
        __set_errno(EFAULT);
        goto out;
    }

    fd = __get_file_descriptor(file_descriptor);
    if(fd == NULL)
    {
        __set_errno(EBADF);
        goto out;
    }

    __fd_lock(fd);

    if(FLAG_IS_SET(fd->fd_Flags,FDF_TERMIOS))
    {
        assert(fd->fd_Aux != NULL);

        memcpy(user_tios,fd->fd_Aux,sizeof(struct termios));
    }
    else
    {
        tios = __get_termios(fd);
        if(tios == NULL)
            goto out;

        memcpy(user_tios,tios,sizeof(struct termios));
    }

    result = OK;

 out:

    __fd_unlock(fd);

    __stdio_unlock();

    return(result);
}