1 /* Copyright (C) 1996-2016 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Thorsten Kukuk <kukuk@suse.de>, 1996.
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.
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.
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/>. */
24 #include <libc-lock.h>
25 #include <rpcsvc/yp.h>
26 #include <rpcsvc/ypclnt.h>
31 /* Get the declaration of the parser function. */
33 #define STRUCTURE group
35 #include <nss/nss_files/files-parse.c>
37 /* Protect global state against multiple changers */
38 __libc_lock_define_initialized (static, lock
)
40 static bool_t new_start
= 1;
43 static intern_t intern
;
47 internal_nis_endgrent (void)
57 struct response_t
*curr
= intern
.start
;
61 struct response_t
*last
= curr
;
66 intern
.next
= intern
.start
= NULL
;
71 _nss_nis_endgrent (void)
73 __libc_lock_lock (lock
);
75 internal_nis_endgrent ();
77 __libc_lock_unlock (lock
);
79 return NSS_STATUS_SUCCESS
;
84 internal_nis_setgrent (void)
86 /* We have to read all the data now. */
88 if (__glibc_unlikely (yp_get_default_domain (&domain
)))
89 return NSS_STATUS_UNAVAIL
;
91 struct ypall_callback ypcb
;
93 ypcb
.foreach
= _nis_saveit
;
94 ypcb
.data
= (char *) &intern
;
95 enum nss_status status
= yperr2nss (yp_all (domain
, "group.byname", &ypcb
));
98 /* Mark the last buffer as full. */
99 if (intern
.next
!= NULL
)
100 intern
.next
->size
= intern
.offset
;
102 intern
.next
= intern
.start
;
110 _nss_nis_setgrent (int stayopen
)
112 enum nss_status result
= NSS_STATUS_SUCCESS
;
114 __libc_lock_lock (lock
);
116 internal_nis_endgrent ();
118 if (_nsl_default_nss () & NSS_FLAG_SETENT_BATCH_READ
)
119 result
= internal_nis_setgrent ();
121 __libc_lock_unlock (lock
);
127 static enum nss_status
128 internal_nis_getgrent_r (struct group
*grp
, char *buffer
, size_t buflen
,
131 /* If we read the entire database at setpwent time we just iterate
132 over the data we have in memory. */
133 bool batch_read
= intern
.start
!= NULL
;
136 if (!batch_read
&& __builtin_expect (yp_get_default_domain (&domain
), 0))
137 return NSS_STATUS_UNAVAIL
;
139 /* Get the next entry until we found a correct one. */
150 struct response_t
*bucket
;
153 bucket
= intern
.next
;
155 if (__glibc_unlikely (intern
.offset
>= bucket
->size
))
157 if (bucket
->next
== NULL
)
158 return NSS_STATUS_NOTFOUND
;
160 /* We look at all the content in the current bucket. Go on
162 bucket
= intern
.next
= bucket
->next
;
166 for (result
= &bucket
->mem
[intern
.offset
]; isspace (*result
);
170 len
= strlen (result
);
178 /* Maybe we should read the database in one piece. */
179 if ((_nsl_default_nss () & NSS_FLAG_SETENT_BATCH_READ
)
180 && internal_nis_setgrent () == NSS_STATUS_SUCCESS
181 && intern
.start
!= NULL
)
184 goto handle_batch_read
;
187 yperr
= yp_first (domain
, "group.byname", &outkey
, &keylen
,
191 yperr
= yp_next (domain
, "group.byname", oldkey
, oldkeylen
,
192 &outkey
, &keylen
, &result
, &len
);
194 if (__glibc_unlikely (yperr
!= YPERR_SUCCESS
))
196 enum nss_status retval
= yperr2nss (yperr
);
198 if (retval
== NSS_STATUS_TRYAGAIN
)
204 if (__glibc_unlikely ((size_t) (len
+ 1) > buflen
))
209 return NSS_STATUS_TRYAGAIN
;
212 char *p
= strncpy (buffer
, result
, len
);
219 parse_res
= _nss_files_parse_grent (p
, grp
, (void *) buffer
, buflen
,
221 if (__glibc_unlikely (parse_res
== -1))
226 return NSS_STATUS_TRYAGAIN
;
230 intern
.offset
+= len
+ 1;
239 while (parse_res
< 1);
241 return NSS_STATUS_SUCCESS
;
245 _nss_nis_getgrent_r (struct group
*result
, char *buffer
, size_t buflen
,
250 __libc_lock_lock (lock
);
252 status
= internal_nis_getgrent_r (result
, buffer
, buflen
, errnop
);
254 __libc_lock_unlock (lock
);
260 _nss_nis_getgrnam_r (const char *name
, struct group
*grp
,
261 char *buffer
, size_t buflen
, int *errnop
)
266 return NSS_STATUS_UNAVAIL
;
270 if (__glibc_unlikely (yp_get_default_domain (&domain
)))
271 return NSS_STATUS_UNAVAIL
;
275 int yperr
= yp_match (domain
, "group.byname", name
, strlen (name
), &result
,
278 if (__glibc_unlikely (yperr
!= YPERR_SUCCESS
))
280 enum nss_status retval
= yperr2nss (yperr
);
282 if (retval
== NSS_STATUS_TRYAGAIN
)
287 if (__glibc_unlikely ((size_t) (len
+ 1) > buflen
))
291 return NSS_STATUS_TRYAGAIN
;
294 char *p
= strncpy (buffer
, result
, len
);
300 int parse_res
= _nss_files_parse_grent (p
, grp
, (void *) buffer
, buflen
,
302 if (__builtin_expect (parse_res
< 1, 0))
305 return NSS_STATUS_TRYAGAIN
;
307 return NSS_STATUS_NOTFOUND
;
309 return NSS_STATUS_SUCCESS
;
313 _nss_nis_getgrgid_r (gid_t gid
, struct group
*grp
,
314 char *buffer
, size_t buflen
, int *errnop
)
317 if (__glibc_unlikely (yp_get_default_domain (&domain
)))
318 return NSS_STATUS_UNAVAIL
;
321 int nlen
= sprintf (buf
, "%lu", (unsigned long int) gid
);
325 int yperr
= yp_match (domain
, "group.bygid", buf
, nlen
, &result
, &len
);
327 if (__glibc_unlikely (yperr
!= YPERR_SUCCESS
))
329 enum nss_status retval
= yperr2nss (yperr
);
331 if (retval
== NSS_STATUS_TRYAGAIN
)
336 if (__glibc_unlikely ((size_t) (len
+ 1) > buflen
))
340 return NSS_STATUS_TRYAGAIN
;
343 char *p
= strncpy (buffer
, result
, len
);
349 int parse_res
= _nss_files_parse_grent (p
, grp
, (void *) buffer
, buflen
,
351 if (__glibc_unlikely (parse_res
< 1))
354 return NSS_STATUS_TRYAGAIN
;
356 return NSS_STATUS_NOTFOUND
;
358 return NSS_STATUS_SUCCESS
;