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f7a9f785 | 1 | /* Copyright (C) 1991-2016 Free Software Foundation, Inc. |
2303f5fd | 2 | This file is part of the GNU C Library. |
267ca16a | 3 | |
2303f5fd | 4 | The GNU C Library is free software; you can redistribute it and/or |
41bdb6e2 AJ |
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. | |
267ca16a | 8 | |
2303f5fd UD |
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 | |
41bdb6e2 | 12 | Lesser General Public License for more details. |
267ca16a | 13 | |
41bdb6e2 | 14 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
15 | License along with the GNU C Library; if not, see |
16 | <http://www.gnu.org/licenses/>. */ | |
267ca16a UD |
17 | |
18 | #include <ctype.h> | |
d71b808a | 19 | #include <errno.h> |
267ca16a UD |
20 | #include <grp.h> |
21 | #include <stdio.h> | |
22 | ||
3ce1f295 UD |
23 | #include <libio/iolibio.h> |
24 | #define flockfile(s) _IO_flockfile (s) | |
25 | #define funlockfile(s) _IO_funlockfile (s) | |
50304ef0 | 26 | |
267ca16a UD |
27 | /* Define a line parsing function using the common code |
28 | used in the nss_files module. */ | |
29 | ||
30 | #define STRUCTURE group | |
31 | #define ENTNAME grent | |
32 | struct grent_data {}; | |
33 | ||
34 | #define TRAILING_LIST_MEMBER gr_mem | |
35 | #define TRAILING_LIST_SEPARATOR_P(c) ((c) == ',') | |
d71b808a | 36 | #include <nss/nss_files/files-parse.c> |
267ca16a UD |
37 | LINE_PARSER |
38 | (, | |
39 | STRING_FIELD (result->gr_name, ISCOLON, 0); | |
2303f5fd UD |
40 | if (line[0] == '\0' |
41 | && (result->gr_name[0] == '+' || result->gr_name[0] == '-')) | |
42 | { | |
43 | result->gr_passwd = NULL; | |
44 | result->gr_gid = 0; | |
45 | } | |
6ed0492f | 46 | else |
2303f5fd UD |
47 | { |
48 | STRING_FIELD (result->gr_passwd, ISCOLON, 0); | |
49 | if (result->gr_name[0] == '+' || result->gr_name[0] == '-') | |
50 | INT_FIELD_MAYBE_NULL (result->gr_gid, ISCOLON, 0, 10, , 0) | |
51 | else | |
52 | INT_FIELD (result->gr_gid, ISCOLON, 0, 10,) | |
53 | } | |
267ca16a UD |
54 | ) |
55 | ||
56 | ||
57 | /* Read one entry from the given stream. */ | |
ba1ffaa1 UD |
58 | int |
59 | __fgetgrent_r (FILE *stream, struct group *resbuf, char *buffer, size_t buflen, | |
60 | struct group **result) | |
267ca16a UD |
61 | { |
62 | char *p; | |
22d57dd3 | 63 | int parse_result; |
267ca16a | 64 | |
50304ef0 | 65 | flockfile (stream); |
267ca16a UD |
66 | do |
67 | { | |
31f7410f | 68 | buffer[buflen - 1] = '\xff'; |
50304ef0 | 69 | p = fgets_unlocked (buffer, buflen, stream); |
a711dd4b | 70 | if (__builtin_expect (p == NULL, 0) && feof_unlocked (stream)) |
ba1ffaa1 | 71 | { |
50304ef0 | 72 | funlockfile (stream); |
ba1ffaa1 | 73 | *result = NULL; |
db873f32 | 74 | __set_errno (ENOENT); |
ba1ffaa1 UD |
75 | return errno; |
76 | } | |
a711dd4b | 77 | if (__builtin_expect (p == NULL, 0) || buffer[buflen - 1] != '\xff') |
6591c335 | 78 | { |
50304ef0 | 79 | funlockfile (stream); |
6591c335 | 80 | *result = NULL; |
db873f32 UD |
81 | __set_errno (ERANGE); |
82 | return errno; | |
6591c335 | 83 | } |
267ca16a UD |
84 | |
85 | /* Skip leading blanks. */ | |
86 | while (isspace (*p)) | |
87 | ++p; | |
22d57dd3 | 88 | } while (*p == '\0' || *p == '#' /* Ignore empty and comment lines. */ |
267ca16a UD |
89 | /* Parse the line. If it is invalid, loop to |
90 | get the next line of the file to parse. */ | |
22d57dd3 | 91 | || ! (parse_result = parse_line (p, resbuf, |
d71b808a | 92 | (void *) buffer, buflen, |
7ba4fcfc | 93 | &errno))); |
22d57dd3 | 94 | |
50304ef0 UD |
95 | funlockfile (stream); |
96 | ||
a711dd4b | 97 | if (__builtin_expect (parse_result, 0) == -1) |
22d57dd3 UD |
98 | { |
99 | /* The parser ran out of space. */ | |
100 | *result = NULL; | |
101 | return errno; | |
102 | } | |
267ca16a | 103 | |
ba1ffaa1 UD |
104 | *result = resbuf; |
105 | return 0; | |
267ca16a UD |
106 | } |
107 | weak_alias (__fgetgrent_r, fgetgrent_r) |