1 /* Copyright (C) 1996-2002, 2003, 2006, 2011 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.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 <bits/libc-lock.h>
25 #include <rpcsvc/yp.h>
26 #include <rpcsvc/ypclnt.h>
30 __libc_lock_define_initialized (static, lock
)
32 static bool_t new_start
= 1;
37 _nss_nis_parse_aliasent (const char *key
, char *alias
, struct aliasent
*result
,
38 char *buffer
, size_t buflen
, int *errnop
)
40 char *first_unused
= buffer
+ strlen (alias
) + 1;
42 buflen
- (buflen
% __alignof__ (char *)) - strlen (alias
) - 2;
46 result
->alias_members_len
= 0;
49 strcpy (first_unused
, key
);
51 if (first_unused
[room_left
- 1] != '\0')
53 /* The line is too long for our buffer. */
59 result
->alias_name
= first_unused
;
61 /* Terminate the line for any case. */
62 cp
= strpbrk (alias
, "#\n");
66 first_unused
+= strlen (result
->alias_name
) + 1;
67 /* Adjust the pointer so it is aligned for
69 first_unused
+= __alignof__ (char *) - 1;
70 first_unused
-= ((first_unused
- (char *) 0) % __alignof__ (char *));
71 result
->alias_members
= (char **) first_unused
;
77 /* Skip leading blanks. */
78 while (isspace (*line
))
84 if (room_left
< sizeof (char *))
86 room_left
-= sizeof (char *);
87 result
->alias_members
[result
->alias_members_len
] = line
;
89 while (*line
!= '\0' && *line
!= ',')
92 if (line
!= result
->alias_members
[result
->alias_members_len
])
96 result
->alias_members_len
++;
99 return result
->alias_members_len
== 0 ? 0 : 1;
103 _nss_nis_setaliasent (void)
105 __libc_lock_lock (lock
);
115 __libc_lock_unlock (lock
);
117 return NSS_STATUS_SUCCESS
;
119 /* The 'endaliasent' function is identical. */
120 strong_alias (_nss_nis_setaliasent
, _nss_nis_endaliasent
)
122 static enum nss_status
123 internal_nis_getaliasent_r (struct aliasent
*alias
, char *buffer
,
124 size_t buflen
, int *errnop
)
128 if (__builtin_expect (yp_get_default_domain (&domain
), 0))
129 return NSS_STATUS_UNAVAIL
;
131 alias
->alias_local
= 0;
133 /* Get the next entry until we found a correct one. */
144 yperr
= yp_first (domain
, "mail.aliases", &outkey
, &keylen
, &result
,
147 yperr
= yp_next (domain
, "mail.aliases", oldkey
, oldkeylen
, &outkey
,
148 &keylen
, &result
, &len
);
150 if (__builtin_expect (yperr
!= YPERR_SUCCESS
, 0))
152 enum nss_status retval
= yperr2nss (yperr
);
154 if (retval
== NSS_STATUS_TRYAGAIN
)
159 if (__builtin_expect ((size_t) (len
+ 1) > buflen
, 0))
163 return NSS_STATUS_TRYAGAIN
;
165 char *p
= strncpy (buffer
, result
, len
);
171 parse_res
= _nss_nis_parse_aliasent (outkey
, p
, alias
, buffer
,
173 if (__builtin_expect (parse_res
== -1, 0))
177 return NSS_STATUS_TRYAGAIN
;
187 return NSS_STATUS_SUCCESS
;
191 _nss_nis_getaliasent_r (struct aliasent
*alias
, char *buffer
, size_t buflen
,
194 enum nss_status status
;
196 __libc_lock_lock (lock
);
198 status
= internal_nis_getaliasent_r (alias
, buffer
, buflen
, errnop
);
200 __libc_lock_unlock (lock
);
206 _nss_nis_getaliasbyname_r (const char *name
, struct aliasent
*alias
,
207 char *buffer
, size_t buflen
, int *errnop
)
212 return NSS_STATUS_UNAVAIL
;
216 if (__builtin_expect (yp_get_default_domain (&domain
), 0))
217 return NSS_STATUS_UNAVAIL
;
219 size_t namlen
= strlen (name
);
221 int use_alloca
= __libc_use_alloca (namlen
+ 1);
223 name2
= __alloca (namlen
+ 1);
226 name2
= malloc (namlen
+ 1);
230 return NSS_STATUS_TRYAGAIN
;
234 /* Convert name to lowercase. */
236 for (i
= 0; i
< namlen
; ++i
)
237 name2
[i
] = _tolower (name
[i
]);
242 int yperr
= yp_match (domain
, "mail.aliases", name2
, namlen
, &result
, &len
);
247 if (__builtin_expect (yperr
!= YPERR_SUCCESS
, 0))
249 enum nss_status retval
= yperr2nss (yperr
);
251 if (retval
== NSS_STATUS_TRYAGAIN
)
256 if (__builtin_expect ((size_t) (len
+ 1) > buflen
, 0))
260 return NSS_STATUS_TRYAGAIN
;
263 char *p
= strncpy (buffer
, result
, len
);
269 alias
->alias_local
= 0;
270 int parse_res
= _nss_nis_parse_aliasent (name
, p
, alias
, buffer
, buflen
,
272 if (__builtin_expect (parse_res
< 1, 0))
275 return NSS_STATUS_TRYAGAIN
;
277 return NSS_STATUS_NOTFOUND
;
280 return NSS_STATUS_SUCCESS
;