1/* Copyright (C) 1997-2016 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#include "nss_hesiod.h"
28
29/* Get the declaration of the parser function. */
30#define ENTNAME pwent
31#define STRUCTURE passwd
32#define EXTERN_PARSER
33#include <nss/nss_files/files-parse.c>
34
35enum nss_status
36_nss_hesiod_setpwent (int stayopen)
37{
38 return NSS_STATUS_SUCCESS;
39}
40
41enum nss_status
42_nss_hesiod_endpwent (void)
43{
44 return NSS_STATUS_SUCCESS;
45}
46
47static enum nss_status
48lookup (const char *name, const char *type, struct passwd *pwd,
49 char *buffer, size_t buflen, int *errnop)
50{
51 struct parser_data *data = (void *) buffer;
52 size_t linebuflen;
53 void *context;
54 char **list;
55 int parse_res;
56 size_t len;
57 int olderr = errno;
58
59 context = _nss_hesiod_init ();
60 if (context == NULL)
61 return NSS_STATUS_UNAVAIL;
62
63 list = hesiod_resolve (context, name, type);
64 if (list == NULL)
65 {
66 int err = errno;
67 hesiod_end (context);
68 __set_errno (olderr);
69 return err == ENOENT ? NSS_STATUS_NOTFOUND : NSS_STATUS_UNAVAIL;
70 }
71
72 linebuflen = buffer + buflen - data->linebuffer;
73 len = strlen (*list) + 1;
74 if (linebuflen < len)
75 {
76 hesiod_free_list (context, list);
77 hesiod_end (context);
78 *errnop = ERANGE;
79 return NSS_STATUS_TRYAGAIN;
80 }
81
82 memcpy (data->linebuffer, *list, len);
83 hesiod_free_list (context, list);
84 hesiod_end (context);
85
86 parse_res = _nss_files_parse_pwent (buffer, pwd, data, buflen, errnop);
87 if (parse_res < 1)
88 {
89 __set_errno (olderr);
90 return parse_res == -1 ? NSS_STATUS_TRYAGAIN : NSS_STATUS_NOTFOUND;
91 }
92
93 return NSS_STATUS_SUCCESS;
94}
95
96enum nss_status
97_nss_hesiod_getpwnam_r (const char *name, struct passwd *pwd,
98 char *buffer, size_t buflen, int *errnop)
99{
100 return lookup (name, "passwd", pwd, buffer, buflen, errnop);
101}
102
103enum nss_status
104_nss_hesiod_getpwuid_r (uid_t uid, struct passwd *pwd,
105 char *buffer, size_t buflen, int *errnop)
106{
107 char uidstr[21]; /* We will probably never have a gid_t with more
108 than 64 bits. */
109
110 snprintf (uidstr, sizeof uidstr, "%d", uid);
111
112 return lookup (uidstr, "uid", pwd, buffer, buflen, errnop);
113}
114