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/*
* libexplain - Explain errno values returned by libc functions
* Copyright (C) 2008-2011, 2013 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/limits.h> /* for PATH_MAX on Solaris */
#include <libexplain/ac/sys/param.h> /* for PATH_MAX except Solaris */
#include <libexplain/ac/sys/socket.h>
#include <libexplain/ac/sys/stat.h>
#include <libexplain/buffer/fildes_to_pathname.h>
#include <libexplain/buffer/sockaddr.h>
#include <libexplain/fileinfo.h>
#include <libexplain/string_buffer.h>
static void
explain_buffer_fildes_to_path(explain_string_buffer_t *sb, int fildes)
{
char path[PATH_MAX + 1];
if (explain_fileinfo_self_fd_n(fildes, path, sizeof(path)))
{
explain_string_buffer_putc(sb, ' ');
explain_string_buffer_puts_quoted(sb, path);
}
}
static int
explain_buffer_fildes_to_sockaddr(explain_string_buffer_t *sb, int fildes)
{
struct sockaddr_storage sa;
socklen_t sas;
/*
* Print the address of the local end of the connection.
*/
sas = sizeof(sa);
if (getsockname(fildes, (struct sockaddr *)&sa, &sas) < 0)
return -1;
explain_string_buffer_putc(sb, ' ');
explain_buffer_sockaddr(sb, (struct sockaddr *)&sa, sas);
/*
* If available, also
* print the address of the remote end of the connection.
*/
sas = sizeof(sa);
if (getpeername(fildes, (struct sockaddr *)&sa, &sas) < 0)
return 0;
explain_string_buffer_puts(sb, " => ");
explain_buffer_sockaddr(sb, (struct sockaddr *)&sa, sas);
return 0;
}
void
explain_buffer_fildes_to_pathname(explain_string_buffer_t *sb, int fildes)
{
struct stat st;
if (fstat(fildes, &st) < 0)
return;
switch (st.st_mode & S_IFMT)
{
case S_IFSOCK:
if (explain_buffer_fildes_to_sockaddr(sb, fildes))
goto oops;
break;
default:
oops:
explain_buffer_fildes_to_path(sb, fildes);
break;
}
}
/* vim: set ts=8 sw=4 et : */
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