1 /* Copyright (C) 1996,97,98,99,2000,2002 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@cygnus.com>, 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, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
21 #include <bits/libc-lock.h>
25 /*******************************************************************\
26 |* Here we assume several symbols to be defined: *|
28 |* LOOKUP_TYPE - the return type of the function *|
30 |* SETFUNC_NAME - name of the non-reentrant setXXXent function *|
32 |* GETFUNC_NAME - name of the non-reentrant getXXXent function *|
34 |* ENDFUNC_NAME - name of the non-reentrant endXXXent function *|
36 |* DATABASE_NAME - name of the database the function accesses *|
37 |* (e.g., host, services, ...) *|
39 |* Optionally the following vars can be defined: *|
41 |* STAYOPEN - variable declaration for setXXXent function *|
43 |* STAYOPEN_VAR - variable name for setXXXent function *|
45 |* NEED_H_ERRNO - an extra parameter will be passed to point to *|
46 |* the global `h_errno' variable. *|
48 \*******************************************************************/
50 /* To make the real sources a bit prettier. */
51 #define REENTRANT_GETNAME APPEND_R (GETFUNC_NAME)
52 #define APPEND_R(Name) CONCAT2_2 (Name, _r)
53 #define INTERNAL(Name) CONCAT2_2 (__, Name)
54 #define CONCAT2_1(Pre, Post) CONCAT2_2 (Pre, Post)
55 #define CONCAT2_2(Pre, Post) Pre##Post
57 #define SETFUNC_NAME_STRING STRINGIZE (SETFUNC_NAME)
58 #define GETFUNC_NAME_STRING STRINGIZE (REENTRANT_GETNAME)
59 #define ENDFUNC_NAME_STRING STRINGIZE (ENDFUNC_NAME)
60 #define DATABASE_NAME_STRING STRINGIZE (DATABASE_NAME)
61 #define STRINGIZE(Name) STRINGIZE1 (Name)
62 #define STRINGIZE1(Name) #Name
65 # define DB_LOOKUP_FCT CONCAT3_1 (__nss_, DATABASE_NAME, _lookup)
66 # define CONCAT3_1(Pre, Name, Post) CONCAT3_2 (Pre, Name, Post)
67 # define CONCAT3_2(Pre, Name, Post) Pre##Name##Post
70 /* Sometimes we need to store error codes in the `h_errno' variable. */
72 # define H_ERRNO_PARM , int *h_errnop
73 # define H_ERRNO_VAR , &h_errno
74 # define H_ERRNO_VAR_P &h_errno
78 # define H_ERRNO_VAR_P NULL
81 /* Some databases take the `stayopen' flag. */
83 # define STAYOPEN_TMP CONCAT2_1 (STAYOPEN, _tmp)
84 # define STAYOPEN_TMPVAR &CONCAT2_1 (STAYOPEN_VAR, _tmp)
86 # define STAYOPEN void
87 # define STAYOPEN_VAR 0
88 # define STAYOPEN_TMPVAR NULL
95 /* This handle for the NSS data base is shared between all
96 set/get/endXXXent functions. */
97 static service_user *nip;
98 /* Remember the last service used since the last call to `endXXent'. */
99 static service_user *last_nip;
100 /* Remember the first service_entry, it's always the same. */
101 static service_user *startp;
104 /* We need to remember the last `stayopen' flag given by the user
105 since the `setent' function is only called for the first available
110 /* Protect above variable against multiple uses at the same time. */
111 __libc_lock_define_initialized (static, lock)
113 /* The lookup function for the first entry of this service. */
114 extern int DB_LOOKUP_FCT (service_user **nip, const char *name, void **fctp);
117 SETFUNC_NAME (STAYOPEN)
121 __libc_lock_lock (lock);
122 __nss_setent (SETFUNC_NAME_STRING, DB_LOOKUP_FCT, &nip, &startp,
123 &last_nip, STAYOPEN_VAR, STAYOPEN_TMPVAR, NEED__RES);
126 __libc_lock_unlock (lock);
136 __libc_lock_lock (lock);
137 __nss_endent (ENDFUNC_NAME_STRING, DB_LOOKUP_FCT, &nip, &startp,
138 &last_nip, NEED__RES);
140 __libc_lock_unlock (lock);
146 INTERNAL (REENTRANT_GETNAME) (LOOKUP_TYPE *resbuf, char *buffer, size_t buflen,
147 LOOKUP_TYPE **result H_ERRNO_PARM)
152 __libc_lock_lock (lock);
153 status = __nss_getent_r (GETFUNC_NAME_STRING, SETFUNC_NAME_STRING,
154 DB_LOOKUP_FCT, &nip, &startp, &last_nip,
155 STAYOPEN_TMPVAR, NEED__RES, resbuf, buffer,
156 buflen, (void **) result, H_ERRNO_VAR_P);
158 __libc_lock_unlock (lock);
164 #include <shlib-compat.h>
165 #if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1_2)
166 #define OLD(name) OLD1 (name)
167 #define OLD1(name) __old_##name
170 OLD (REENTRANT_GETNAME) (LOOKUP_TYPE *resbuf, char *buffer, size_t buflen,
171 LOOKUP_TYPE **result H_ERRNO_PARM)
173 int ret = INTERNAL (REENTRANT_GETNAME) (resbuf, buffer, buflen,
182 #define do_symbol_version(real, name, version) \
183 compat_symbol (libc, real, name, version)
184 do_symbol_version (OLD (REENTRANT_GETNAME), REENTRANT_GETNAME, GLIBC_2_0);
187 #define do_default_symbol_version(real, name, version) \
188 versioned_symbol (libc, real, name, version)
189 do_default_symbol_version (INTERNAL (REENTRANT_GETNAME),
190 REENTRANT_GETNAME, GLIBC_2_1_2);