1 | /* Copyright (C) 1997-2017 Free Software Foundation, Inc. |
2 | This file is part of the GNU C Library. |
3 | Contributed by Mark Kettenis <kettenis@phys.uva.nl>, 1997. |
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 | <http://www.gnu.org/licenses/>. */ |
18 | |
19 | #include <errno.h> |
20 | #include <hesiod.h> |
21 | #include <pwd.h> |
22 | #include <nss.h> |
23 | #include <stdio.h> |
24 | #include <stdlib.h> |
25 | #include <string.h> |
26 | |
27 | /* Get the declaration of the parser function. */ |
28 | #define ENTNAME pwent |
29 | #define STRUCTURE passwd |
30 | #define EXTERN_PARSER |
31 | #include <nss/nss_files/files-parse.c> |
32 | |
33 | enum nss_status |
34 | _nss_hesiod_setpwent (int stayopen) |
35 | { |
36 | return NSS_STATUS_SUCCESS; |
37 | } |
38 | |
39 | enum nss_status |
40 | _nss_hesiod_endpwent (void) |
41 | { |
42 | return NSS_STATUS_SUCCESS; |
43 | } |
44 | |
45 | static enum nss_status |
46 | lookup (const char *name, const char *type, struct passwd *pwd, |
47 | char *buffer, size_t buflen, int *errnop) |
48 | { |
49 | struct parser_data *data = (void *) buffer; |
50 | size_t linebuflen; |
51 | void *context; |
52 | char **list; |
53 | int parse_res; |
54 | size_t len; |
55 | int olderr = errno; |
56 | |
57 | if (hesiod_init (&context) < 0) |
58 | return NSS_STATUS_UNAVAIL; |
59 | |
60 | list = hesiod_resolve (context, name, type); |
61 | if (list == NULL) |
62 | { |
63 | int err = errno; |
64 | hesiod_end (context); |
65 | __set_errno (olderr); |
66 | return err == ENOENT ? NSS_STATUS_NOTFOUND : NSS_STATUS_UNAVAIL; |
67 | } |
68 | |
69 | linebuflen = buffer + buflen - data->linebuffer; |
70 | len = strlen (*list) + 1; |
71 | if (linebuflen < len) |
72 | { |
73 | hesiod_free_list (context, list); |
74 | hesiod_end (context); |
75 | *errnop = ERANGE; |
76 | return NSS_STATUS_TRYAGAIN; |
77 | } |
78 | |
79 | memcpy (data->linebuffer, *list, len); |
80 | hesiod_free_list (context, list); |
81 | hesiod_end (context); |
82 | |
83 | parse_res = _nss_files_parse_pwent (buffer, pwd, data, buflen, errnop); |
84 | if (parse_res < 1) |
85 | { |
86 | __set_errno (olderr); |
87 | return parse_res == -1 ? NSS_STATUS_TRYAGAIN : NSS_STATUS_NOTFOUND; |
88 | } |
89 | |
90 | return NSS_STATUS_SUCCESS; |
91 | } |
92 | |
93 | enum nss_status |
94 | _nss_hesiod_getpwnam_r (const char *name, struct passwd *pwd, |
95 | char *buffer, size_t buflen, int *errnop) |
96 | { |
97 | return lookup (name, "passwd" , pwd, buffer, buflen, errnop); |
98 | } |
99 | |
100 | enum nss_status |
101 | _nss_hesiod_getpwuid_r (uid_t uid, struct passwd *pwd, |
102 | char *buffer, size_t buflen, int *errnop) |
103 | { |
104 | char uidstr[21]; /* We will probably never have a gid_t with more |
105 | than 64 bits. */ |
106 | |
107 | snprintf (uidstr, sizeof uidstr, "%d" , uid); |
108 | |
109 | return lookup (uidstr, "uid" , pwd, buffer, buflen, errnop); |
110 | } |
111 | |