.
[glibc/history.git] / nis / nis_domain_of_r.c
blobe2db1460383e3ce4a051edb7b537753df086bb85
1 /* Copyright (c) 1997, 2004, 2006 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1997.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
18 02111-1307 USA. */
20 #include <errno.h>
21 #include <string.h>
22 #include <rpcsvc/nis.h>
24 nis_name
25 nis_domain_of_r (const_nis_name name, char *buffer, size_t buflen)
27 char *cptr;
28 size_t cptr_len;
30 if (buffer == NULL)
32 erange:
33 __set_errno (ERANGE);
34 return NULL;
37 buffer[0] = '\0';
39 cptr = strchr (name, '.');
41 if (cptr == NULL)
42 return buffer;
44 ++cptr;
45 cptr_len = strlen (cptr);
47 if (cptr_len == 0)
49 if (buflen < 2)
50 goto erange;
51 return strcpy (buffer, ".");
54 if (__builtin_expect (cptr_len >= buflen, 0))
56 __set_errno (ERANGE);
57 return NULL;
60 return memcpy (buffer, cptr, cptr_len + 1);
62 libnsl_hidden_def (nis_domain_of_r)