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6b9fecdc | 1 | /* Copyright (C) 1996, 1997, 1999, 2000 Free Software Foundation, Inc. |
26761c28 | 2 | This file is part of the GNU C Library. |
5f0e6fc7 | 3 | |
26761c28 | 4 | The GNU C Library is free software; you can redistribute it and/or |
41bdb6e2 AJ |
5 | modify it under the terms of the GNU Lesser General Public |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
5f0e6fc7 | 8 | |
26761c28 UD |
9 | The GNU C Library is distributed in the hope that it will be useful, |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 12 | Lesser General Public License for more details. |
5f0e6fc7 | 13 | |
41bdb6e2 AJ |
14 | You should have received a copy of the GNU Lesser General Public |
15 | License along with the GNU C Library; if not, write to the Free | |
16 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
17 | 02111-1307 USA. */ | |
26761c28 UD |
18 | |
19 | #include <errno.h> | |
5107cf1d | 20 | #include <bits/libc-lock.h> |
26761c28 | 21 | #include <stdlib.h> |
5f0e6fc7 RM |
22 | |
23 | #include "nsswitch.h" | |
24 | ||
25 | /*******************************************************************\ | |
26 | |* Here we assume several symbols to be defined: *| | |
6b9fecdc | 27 | |* *| |
5f0e6fc7 | 28 | |* LOOKUP_TYPE - the return type of the function *| |
6b9fecdc | 29 | |* *| |
5f0e6fc7 | 30 | |* GETFUNC_NAME - name of the non-reentrant getXXXent function *| |
6b9fecdc | 31 | |* *| |
5f0e6fc7 | 32 | |* BUFLEN - size of static buffer *| |
6b9fecdc | 33 | |* *| |
5f0e6fc7 | 34 | |* Optionally the following vars can be defined: *| |
6b9fecdc | 35 | |* *| |
5f0e6fc7 RM |
36 | |* NEED_H_ERRNO - an extra parameter will be passed to point to *| |
37 | |* the global `h_errno' variable. *| | |
6b9fecdc | 38 | |* *| |
5f0e6fc7 RM |
39 | \*******************************************************************/ |
40 | ||
41 | /* To make the real sources a bit prettier. */ | |
42 | #define REENTRANT_GETNAME APPEND_R (GETFUNC_NAME) | |
43 | #define APPEND_R(name) APPEND_R1 (name) | |
44 | #define APPEND_R1(name) name##_r | |
23396375 UD |
45 | #define INTERNAL(name) INTERNAL1 (name) |
46 | #define INTERNAL1(name) __##name | |
5f0e6fc7 RM |
47 | |
48 | /* Sometimes we need to store error codes in the `h_errno' variable. */ | |
49 | #ifdef NEED_H_ERRNO | |
50 | # define H_ERRNO_PARM , int *h_errnop | |
8b801829 | 51 | # define H_ERRNO_VAR &h_errno |
5f0e6fc7 RM |
52 | #else |
53 | # define H_ERRNO_PARM | |
8b801829 | 54 | # define H_ERRNO_VAR NULL |
5f0e6fc7 RM |
55 | #endif |
56 | ||
57 | /* Prototype of the reentrant version. */ | |
ba1ffaa1 UD |
58 | extern int INTERNAL (REENTRANT_GETNAME) (LOOKUP_TYPE *resbuf, char *buffer, |
59 | size_t buflen, LOOKUP_TYPE **result | |
60 | H_ERRNO_PARM); | |
5f0e6fc7 | 61 | |
26761c28 UD |
62 | /* We need to protect the dynamic buffer handling. */ |
63 | __libc_lock_define_initialized (static, lock); | |
64 | ||
d60d215c | 65 | /* This points to the static buffer used. */ |
c877418f | 66 | libc_freeres_ptr (static char *buffer); |
d60d215c | 67 | |
5f0e6fc7 RM |
68 | |
69 | LOOKUP_TYPE * | |
70 | GETFUNC_NAME (void) | |
71 | { | |
26761c28 | 72 | static size_t buffer_size; |
fb776f3e AJ |
73 | static union |
74 | { | |
75 | LOOKUP_TYPE l; | |
76 | void *ptr; | |
77 | } resbuf; | |
22d57dd3 | 78 | LOOKUP_TYPE *result; |
26761c28 UD |
79 | int save; |
80 | ||
81 | /* Get lock. */ | |
82 | __libc_lock_lock (lock); | |
83 | ||
8b801829 UD |
84 | result = (LOOKUP_TYPE *) |
85 | __nss_getent ((getent_r_function) INTERNAL (REENTRANT_GETNAME), | |
fb776f3e | 86 | &resbuf.ptr, &buffer, BUFLEN, &buffer_size, |
8b801829 | 87 | H_ERRNO_VAR); |
26761c28 | 88 | |
26761c28 UD |
89 | save = errno; |
90 | __libc_lock_unlock (lock); | |
91 | __set_errno (save); | |
ba1ffaa1 | 92 | return result; |
5f0e6fc7 | 93 | } |