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/*
* libexplain - Explain errno values returned by libc functions
* Copyright (C) 2013 Peter Miller
*
* 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/errno.h>
#include <libexplain/ac/netdb.h>
#include <libexplain/gethostbyname.h>
#include <libexplain/output.h>
struct hostent *
explain_gethostbyname_or_die(const char *name)
{
struct hostent *result;
result = explain_gethostbyname_on_error(name);
if (!result)
{
explain_output_exit_failure();
}
return result;
}
struct hostent *
explain_gethostbyname_on_error(const char *name)
{
struct hostent *result;
#ifdef HAVE_GETHOSTBYNAME
result = gethostbyname(name);
#else
errno = ENOSYS;
#ifdef NETDB_INTERNAL
h_error = NETDB_INTERNAL;
#else
h_error = NO_RECOVERY;
#endif
result = 0;
#endif
if (!result)
{
int hold_errno;
int hold_h_errno;
hold_errno = errno;
hold_h_errno = h_errno;
explain_output_error
(
"%s",
explain_errno_gethostbyname(hold_h_errno, name)
);
errno = hold_errno;
h_errno = hold_h_errno;
}
return result;
}
/* vim: set ts=8 sw=4 et : */
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