1/* Generic implementation of fget*ent_r.
2 Copyright (C) 2020-2023 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
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.
9
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.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#include <errno.h>
20#include <nss_files.h>
21#include <stdbool.h>
22
23int
24__nss_fgetent_r (FILE *fp, void *result, char *buffer, size_t buffer_length,
25 nss_files_parse_line parser)
26{
27 int ret;
28
29 _IO_flockfile (fp);
30
31 while (true)
32 {
33 off64_t original_offset;
34 ret = __nss_readline (fp, buffer, buffer_length, &original_offset);
35 if (ret == 0)
36 {
37 /* Parse the line into *RESULT. */
38 ret = parser (buffer, result,
39 (struct parser_data *) buffer, buffer_length, &errno);
40
41 /* Translate the result code from the parser into an errno
42 value. Also seeks back to the start of the line if
43 necessary. */
44 ret = __nss_parse_line_result (fp, original_offset, ret);
45
46 if (ret == EINVAL)
47 /* Skip over malformed lines. */
48 continue;
49 }
50 break;
51 }
52
53 _IO_funlockfile (fp);
54
55 return ret;
56}
57