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/* Copyright (c) 1997-2022 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library 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 2.1 of the License, or (at your option) any later version.
The GNU C Library 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 the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <errno.h>
#include <string.h>
#include <rpcsvc/nis.h>
#include <shlib-compat.h>
nis_name
nis_domain_of_r (const_nis_name name, char *buffer, size_t buflen)
{
char *cptr;
size_t cptr_len;
if (buffer == NULL)
{
erange:
__set_errno (ERANGE);
return NULL;
}
buffer[0] = '\0';
cptr = strchr (name, '.');
if (cptr == NULL)
return buffer;
++cptr;
cptr_len = strlen (cptr);
if (cptr_len == 0)
{
if (buflen < 2)
goto erange;
return strcpy (buffer, ".");
}
if (__glibc_unlikely (cptr_len >= buflen))
{
__set_errno (ERANGE);
return NULL;
}
return memcpy (buffer, cptr, cptr_len + 1);
}
libnsl_hidden_nolink_def (nis_domain_of_r, GLIBC_2_1)
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