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/*
* libexplain - Explain errno values returned by libc functions
* Copyright (C) 2009-2011 Peter Miller
* Written by Peter Miller <pmiller@opensource.org.au>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 3 of the License, or (at your
* option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <libexplain/ac/sys/ioctl.h>
#include <libexplain/ac/sys/stat.h>
#include <libexplain/iocontrol/generic.h>
#include <libexplain/iocontrol/tiocinq.h>
#ifdef TIOCINQ
static int
disambiguate(int fildes, int request, const void *data)
{
struct stat st;
/* success = 0, failure = -1 */
(void)request;
(void)data;
if (fstat(fildes, &st) >= 0 && S_ISCHR(st.st_mode))
return 0;
return -1;
}
/*
* We have conflicts...
* SIOCINQ - sockets only
* TIOCINQ - terminals only
* FIONREAD - everything else
*/
const explain_iocontrol_t explain_iocontrol_tiocinq =
{
"TIOCINQ", /* name */
TIOCINQ, /* value */
disambiguate,
0, /* print_name */
explain_iocontrol_generic_print_data_pointer, /* print_data */
0, /* print_explanation */
explain_iocontrol_generic_print_data_int_star, /* print_data_returned */
sizeof(int), /* data_size */
"int *", /* data_type */
IOCONTROL_FLAG_SIZE_DOES_NOT_AGREE, /* flags */
__FILE__,
__LINE__,
};
#else
const explain_iocontrol_t explain_iocontrol_tiocinq =
{
0, /* name */
0, /* value */
0, /* disambiguate */
0, /* print_name */
0, /* print_data */
0, /* print_explanation */
0, /* print_data_returned */
0, /* data_size */
0, /* data_type */
0, /* flags */
__FILE__,
__LINE__,
};
#endif
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