hurd: XFAIL appearance of sched_param and sched_priority from <sys/types.h>
[glibc.git] / nis / nss_nisplus / nisplus-proto.c
blob1ea641df6770b58301314c79c3e4ea075b58e6c8
1 /* Copyright (C) 1997-2018 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1997.
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/>. */
19 #include <atomic.h>
20 #include <ctype.h>
21 #include <errno.h>
22 #include <netdb.h>
23 #include <nss.h>
24 #include <string.h>
25 #include <rpcsvc/nis.h>
26 #include <libc-lock.h>
28 #include "nss-nisplus.h"
30 __libc_lock_define_initialized (static, lock)
32 static nis_result *result;
33 static nis_name tablename_val;
34 static u_long tablename_len;
36 #define NISENTRYVAL(idx, col, res) \
37 (NIS_RES_OBJECT (res)[idx].EN_data.en_cols.en_cols_val[col].ec_value.ec_value_val)
39 #define NISENTRYLEN(idx, col, res) \
40 (NIS_RES_OBJECT (res)[idx].EN_data.en_cols.en_cols_val[col].ec_value.ec_value_len)
43 static int
44 _nss_nisplus_parse_protoent (nis_result *result, struct protoent *proto,
45 char *buffer, size_t buflen, int *errnop)
47 char *first_unused = buffer;
48 size_t room_left = buflen;
49 unsigned int i;
51 if (result == NULL)
52 return 0;
54 if ((result->status != NIS_SUCCESS && result->status != NIS_S_SUCCESS)
55 || __type_of (NIS_RES_OBJECT (result)) != NIS_ENTRY_OBJ
56 || strcmp (NIS_RES_OBJECT (result)->EN_data.en_type,
57 "protocols_tbl") != 0
58 || NIS_RES_OBJECT (result)->EN_data.en_cols.en_cols_len < 3)
59 return 0;
61 /* Generate the protocols entry format and use the normal parser */
62 if (NISENTRYLEN (0, 0, result) + 1 > room_left)
64 no_more_room:
65 *errnop = ERANGE;
66 return -1;
68 strncpy (first_unused, NISENTRYVAL (0, 0, result),
69 NISENTRYLEN (0, 0, result));
70 first_unused[NISENTRYLEN (0, 0, result)] = '\0';
71 proto->p_name = first_unused;
72 size_t len = strlen (first_unused) + 1;
73 room_left -= len;
74 first_unused += len;
77 proto->p_proto = atoi (NISENTRYVAL (0, 2, result));
79 /* XXX Rewrite at some point to allocate the array first and then
80 copy the strings. It wasteful to first concatenate the strings
81 to just split them again later. */
82 char *line = first_unused;
83 for (i = 0; i < NIS_RES_NUMOBJ (result); ++i)
85 if (strcmp (NISENTRYVAL (i, 1, result), proto->p_name) != 0)
87 if (NISENTRYLEN (i, 1, result) + 2 > room_left)
88 goto no_more_room;
89 *first_unused++ = ' ';
90 first_unused = __stpncpy (first_unused, NISENTRYVAL (i, 1, result),
91 NISENTRYLEN (i, 1, result));
92 room_left -= NISENTRYLEN (i, 1, result) + 1;
95 *first_unused++ = '\0';
97 /* Adjust the pointer so it is aligned for
98 storing pointers. */
99 size_t adjust = ((__alignof__ (char *)
100 - (first_unused - (char *) 0) % __alignof__ (char *))
101 % __alignof__ (char *));
102 if (room_left < adjust + sizeof (char *))
103 goto no_more_room;
104 first_unused += adjust;
105 room_left -= adjust;
106 proto->p_aliases = (char **) first_unused;
108 /* For the terminating NULL pointer. */
109 room_left -= sizeof (char *);
111 i = 0;
112 while (*line != '\0')
114 /* Skip leading blanks. */
115 while (isspace (*line))
116 line++;
117 if (*line == '\0')
118 break;
120 if (room_left < sizeof (char *))
121 goto no_more_room;
123 room_left -= sizeof (char *);
124 proto->p_aliases[i++] = line;
126 while (*line != '\0' && *line != ' ')
127 ++line;
129 if (*line == ' ')
130 *line++ = '\0';
132 proto->p_aliases[i] = NULL;
134 return 1;
137 static enum nss_status
138 _nss_create_tablename (int *errnop)
140 if (tablename_val == NULL)
142 const char *local_dir = nis_local_directory ();
143 size_t local_dir_len = strlen (local_dir);
144 static const char prefix[] = "protocols.org_dir.";
146 char *p = malloc (sizeof (prefix) + local_dir_len);
147 if (p == NULL)
149 *errnop = errno;
150 return NSS_STATUS_TRYAGAIN;
153 memcpy (__stpcpy (p, prefix), local_dir, local_dir_len + 1);
155 tablename_len = sizeof (prefix) - 1 + local_dir_len;
157 atomic_write_barrier ();
159 tablename_val = p;
162 return NSS_STATUS_SUCCESS;
165 enum nss_status
166 _nss_nisplus_setprotoent (int stayopen)
168 enum nss_status status = NSS_STATUS_SUCCESS;
170 __libc_lock_lock (lock);
172 if (result != NULL)
174 nis_freeresult (result);
175 result = NULL;
178 if (tablename_val == NULL)
180 int err;
181 status = _nss_create_tablename (&err);
184 __libc_lock_unlock (lock);
186 return status;
189 enum nss_status
190 _nss_nisplus_endprotoent (void)
192 __libc_lock_lock (lock);
194 if (result != NULL)
196 nis_freeresult (result);
197 result = NULL;
200 __libc_lock_unlock (lock);
202 return NSS_STATUS_SUCCESS;
205 static enum nss_status
206 internal_nisplus_getprotoent_r (struct protoent *proto, char *buffer,
207 size_t buflen, int *errnop)
209 int parse_res;
211 /* Get the next entry until we found a correct one. */
214 nis_result *saved_res;
216 if (result == NULL)
218 saved_res = NULL;
219 if (tablename_val == NULL)
221 enum nss_status status = _nss_create_tablename (errnop);
223 if (status != NSS_STATUS_SUCCESS)
224 return status;
227 result = nis_first_entry (tablename_val);
228 if (result == NULL)
230 *errnop = errno;
231 return NSS_STATUS_TRYAGAIN;
233 if (niserr2nss (result->status) != NSS_STATUS_SUCCESS)
234 return niserr2nss (result->status);
236 else
238 saved_res = result;
239 result = nis_next_entry (tablename_val, &result->cookie);
240 if (result == NULL)
242 *errnop = errno;
243 return NSS_STATUS_TRYAGAIN;
245 if (niserr2nss (result->status) != NSS_STATUS_SUCCESS)
247 nis_freeresult (saved_res);
248 return niserr2nss (result->status);
252 parse_res = _nss_nisplus_parse_protoent (result, proto, buffer,
253 buflen, errnop);
254 if (parse_res == -1)
256 nis_freeresult (result);
257 result = saved_res;
258 *errnop = ERANGE;
259 return NSS_STATUS_TRYAGAIN;
261 else
263 if (saved_res)
264 nis_freeresult (saved_res);
267 while (!parse_res);
269 return NSS_STATUS_SUCCESS;
272 enum nss_status
273 _nss_nisplus_getprotoent_r (struct protoent *result, char *buffer,
274 size_t buflen, int *errnop)
276 int status;
278 __libc_lock_lock (lock);
280 status = internal_nisplus_getprotoent_r (result, buffer, buflen, errnop);
282 __libc_lock_unlock (lock);
284 return status;
287 enum nss_status
288 _nss_nisplus_getprotobyname_r (const char *name, struct protoent *proto,
289 char *buffer, size_t buflen, int *errnop)
291 int parse_res;
293 if (tablename_val == NULL)
295 __libc_lock_lock (lock);
297 enum nss_status status = _nss_create_tablename (errnop);
299 __libc_lock_unlock (lock);
301 if (status != NSS_STATUS_SUCCESS)
302 return status;
305 if (name == NULL)
306 return NSS_STATUS_NOTFOUND;
308 char buf[strlen (name) + 10 + tablename_len];
309 int olderr = errno;
311 /* Search at first in the alias list, and use the correct name
312 for the next search */
313 snprintf (buf, sizeof (buf), "[name=%s],%s", name, tablename_val);
314 nis_result *result = nis_list (buf, FOLLOW_PATH | FOLLOW_LINKS, NULL, NULL);
316 if (result != NULL)
318 char *bufptr = buf;
320 /* If we did not find it, try it as original name. But if the
321 database is correct, we should find it in the first case, too */
322 if ((result->status != NIS_SUCCESS
323 && result->status != NIS_S_SUCCESS)
324 || __type_of (result->objects.objects_val) != NIS_ENTRY_OBJ
325 || strcmp (result->objects.objects_val->EN_data.en_type,
326 "protocols_tbl") != 0
327 || result->objects.objects_val->EN_data.en_cols.en_cols_len < 3)
328 snprintf (buf, sizeof (buf), "[cname=%s],%s", name, tablename_val);
329 else
331 /* We need to allocate a new buffer since there is no
332 guarantee the returned name has a length limit. */
333 const char *entryval = NISENTRYVAL (0, 0, result);
334 size_t buflen = strlen (entryval) + 10 + tablename_len;
335 bufptr = alloca (buflen);
336 snprintf (bufptr, buflen, "[cname=%s],%s",
337 entryval, tablename_val);
340 nis_freeresult (result);
341 result = nis_list (bufptr, FOLLOW_PATH | FOLLOW_LINKS, NULL, NULL);
344 if (result == NULL)
346 __set_errno (ENOMEM);
347 return NSS_STATUS_TRYAGAIN;
350 if (__glibc_unlikely (niserr2nss (result->status) != NSS_STATUS_SUCCESS))
352 enum nss_status status = niserr2nss (result->status);
354 __set_errno (olderr);
356 nis_freeresult (result);
357 return status;
360 parse_res = _nss_nisplus_parse_protoent (result, proto, buffer, buflen,
361 errnop);
363 nis_freeresult (result);
365 if (parse_res < 1)
367 if (parse_res == -1)
369 *errnop = ERANGE;
370 return NSS_STATUS_TRYAGAIN;
372 else
374 __set_errno (olderr);
375 return NSS_STATUS_NOTFOUND;
379 return NSS_STATUS_SUCCESS;
382 enum nss_status
383 _nss_nisplus_getprotobynumber_r (const int number, struct protoent *proto,
384 char *buffer, size_t buflen, int *errnop)
386 if (tablename_val == NULL)
388 __libc_lock_lock (lock);
390 enum nss_status status = _nss_create_tablename (errnop);
392 __libc_lock_unlock (lock);
394 if (status != NSS_STATUS_SUCCESS)
395 return status;
398 char buf[12 + 3 * sizeof (number) + tablename_len];
399 int olderr = errno;
401 snprintf (buf, sizeof (buf), "[number=%d],%s", number, tablename_val);
403 nis_result *result = nis_list (buf, FOLLOW_LINKS | FOLLOW_PATH, NULL, NULL);
405 if (result == NULL)
407 __set_errno (ENOMEM);
408 return NSS_STATUS_TRYAGAIN;
411 if (__glibc_unlikely (niserr2nss (result->status) != NSS_STATUS_SUCCESS))
413 enum nss_status status = niserr2nss (result->status);
415 __set_errno (olderr);
417 nis_freeresult (result);
418 return status;
421 int parse_res = _nss_nisplus_parse_protoent (result, proto, buffer, buflen,
422 errnop);
424 nis_freeresult (result);
426 if (parse_res < 1)
428 if (parse_res == -1)
430 *errnop = ERANGE;
431 return NSS_STATUS_TRYAGAIN;
433 else
435 __set_errno (olderr);
436 return NSS_STATUS_NOTFOUND;
440 return NSS_STATUS_SUCCESS;