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[glibc.git] / inet / getnetgrent.c
blobd464c10cdea59be9b49b2bc4e2f6983c6bc18ca7
1 /* Copyright (C) 1996, 1997, 2000 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, write to the Free
16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
17 02111-1307 USA. */
19 #include <errno.h>
20 #include <netdb.h>
21 #include <stdlib.h>
22 #include <bits/libc-lock.h>
24 /* Statis buffer for return value. We allocate it when needed. */
25 static char *buffer;
26 /* All three strings should fit in a block of 1kB size. */
27 #define BUFSIZE 1024
31 static void
32 allocate (void)
34 buffer = (char *) malloc (BUFSIZE);
37 int
38 getnetgrent (char **hostp, char **userp, char **domainp)
40 __libc_once_define (static, once);
41 __libc_once (once, allocate);
43 if (buffer == NULL)
45 __set_errno (ENOMEM);
46 return -1;
49 return __getnetgrent_r (hostp, userp, domainp, buffer, BUFSIZE);
53 /* Make sure the memory is freed if the programs ends while in
54 memory-debugging mode and something actually was allocated. */
55 static void
56 __attribute__ ((unused))
57 free_mem (void)
59 free (buffer);
62 text_set_element (__libc_subfreeres, free_mem);