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d1c2a14cdf
2000-05-07 Mark Kettenis <kettenis@gnu.org> * nss/nss_db/db-open.c: Cleanup and add comments. Pretty print. Remove duplicate <errno.h> include. Remove inclusion of <libintl.h> and "nsswitch.h". (set_cloexec_flag): New function, broken out of dbopen. (dbopen): Changed return type to `enum nss_status'. Mostly rewritten to make sure that we do not report NSS_STATUS_SUCCESS if something went wrong. Remove unnecessary casts. (internal_setent): Change return type to nss_status. Document, and make sure that the function behaves accordingly. Make dynamically loading the database library really thread-safe and return NSS_STATUS_UNAVAIL if it failed. (db_cursor): Return ENOMEM is memory allocation failed. Remove unecessary casts. * nss/nss_db/dummy-db.h: Add copyright notice. Improve documentation. (struct dbc24, struct dbc27): Use DBT type in parameter lists for c_get function member. * nss/nss_db/nss_db.h: Add and tweak some comments. (DBT): Move typedef before NSS_DBC typedef. (NSS_DBC, NSS_DB): Use DBT in function member parameter lists.
334 lines
8.6 KiB
C
334 lines
8.6 KiB
C
/* Constants and structures from the various Berkeley DB releases.
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Copyright (C) 1999, 2000 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <stdint.h>
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#include "nss_db.h"
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/* This file contains dummy definitions for various constants and
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structures from the Berkeley release. We only provide those
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definitions that are actually needed. In case of the structures,
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we're only interested in the function pointers, since that's the
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interface to the database. Unfortunately the structures have been
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changed several times. */
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/* The value for the btree database type has not been changed (yet?). */
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#define DB_BTREE (1)
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/* Permission flags for all 2.x releases. */
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#define DB2x_RDONLY 0x010000
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/* The error values for all 2.x releases. */
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#define DB2x_KEYEXIST ( -3)
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#define DB2x_NOTFOUND ( -7)
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/* For all 2.x releases up to 2.6.3 we can use the same definitions.
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We'll refer to them as 2.4 since that's the version distributed
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with glibc 2.1. */
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/* Access methods from version 2.4. */
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#define DB24_FIRST 0x000020
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#define DB24_NEXT 0x000800
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#define DB24_NOOVERWRITE 0x001000
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/* Permission flags from version 2.4. */
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#define DB24_TRUNCATE 0x080000
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/* The DB structure from version 2.4. */
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struct db24
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{
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void *mutexp;
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enum { dummy24 } type;
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void *dbenv;
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void *mp_dbenv;
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void *master;
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void *internal;
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void *mp;
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void *mpf;
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struct
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{
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void *tqh_first;
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void **tqh_last;
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} curs_queue;
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struct {
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void *lh_first;
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} handleq;
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struct {
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void *le_next;
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void **le_prev;
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} links;
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uint32_t log_fileid;
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void *txn;
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uint32_t locker;
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struct db24_dbt {
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void *data;
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uint32_t size;
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uint32_t ulen;
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uint32_t dlen;
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uint32_t doff;
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uint32_t flags;
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} lock_dbt;
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struct{
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uint32_t pgno;
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uint8_t fileid[20];
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} lock;
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size_t pgsize;
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void *db_malloc;
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/* Functions. */
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int (*close) (void *, uint32_t);
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int (*cursor) (void *, void *, void **);
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int (*del) (void *, void *, DBT *, uint32_t);
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int (*fd) (void *, int *);
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int (*get) (void *, void *, DBT *, DBT *, uint32_t);
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int (*put) (void *, void *, DBT *, DBT *, uint32_t);
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int (*stat) (void *, void *, void *(*)(size_t), uint32_t);
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int (*sync) (void *, uint32_t);
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uint32_t flags;
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};
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/* The DBC structure for the 2.4 release. */
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struct dbc24
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{
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void *dbp;
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void *txn;
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struct
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{
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void *tqe_next;
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void **tqe_prev;
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} links;
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void *internal;
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void *c_close;
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void *c_del;
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int (*c_get) (void *, DBT *, DBT *, uint32_t);
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void *c_put;
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};
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/* The 2.7 release is slighty different. */
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/* Access methods from version 2.7. */
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#define DB27_FIRST 7
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#define DB27_NEXT 15
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#define DB27_NOOVERWRITE 17
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/* Permission flags from version 2.7. */
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#define DB27_TRUNCATE 0x020000
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/* The DB structure from version 2.7. */
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struct db27
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{
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void *mutexp;
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enum { dummy27 } type;
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int byteswapped;
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int saved_open_fd;
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void *dbenv;
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void *mp_dbenv;
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void *internal;
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void *mp;
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void *mpf;
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struct
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{
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void *tqh_first;
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void **tqh_last;
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} free_queue;
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struct
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{
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void *tqh_first;
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void **tqh_last;
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} active_queue;
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uint8_t fileid[20];
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uint32_t log_fileid;
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size_t pgsize;
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void *db_malloc;
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void *dup_compare;
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void *h_hash;
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/* Functions. */
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int (*am_close) (void *);
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int (*close) (void *, uint32_t);
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int (*cursor) (void *, void *, void **, uint32_t);
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int (*del) (void *, void *, DBT *, uint32_t);
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int (*fd) (void *, int *);
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int (*get) (void *, void *, DBT *, DBT *, uint32_t);
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int (*join) (void *, void **, uint32_t, void **);
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int (*put) (void *, void *, DBT *, DBT *, uint32_t);
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int (*stat) (void *, void *, void *(*)(size_t), uint32_t);
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int (*sync) (void *, uint32_t);
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uint32_t flags;
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};
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/* The DBC structure for version 2.7. */
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struct dbc27
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{
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void *dbp;
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void *txn;
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struct
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{
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void *tqe_next;
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void **tqe_prev;
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} links;
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uint32_t lid;
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uint32_t locker;
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DBT lock_dbt;
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struct{
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uint32_t pgno;
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uint8_t fileid[20];
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} lock;
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size_t mylock;
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DBT rkey;
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DBT rdata;
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void *c_am_close;
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void *c_am_destroy;
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void *c_close;
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void *c_del;
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int (*c_get) (void *, DBT *, DBT *, uint32_t);
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void *c_put;
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void *internal;
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uint32_t flags;
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};
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/* Version 3.0 is mostly incompatible with 2.x. */
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/* Access methods from version 3.0. */
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#define DB30_FIRST 9
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#define DB30_NEXT 17
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#define DB30_NOOVERWRITE 20
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/* Error values from version 3.0. */
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#define DB30_KEYEXIST (-30997)
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#define DB30_NOTFOUND (-30994)
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/* Permission flags from version 3.0. */
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#define DB30_RDONLY 0x000010
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#define DB30_TRUNCATE 0x020000
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/* The DB structure from version 3.0. */
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struct db30
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{
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size_t pgsize;
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void (*db_feedback) (void *, int, int);
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void *(*db_malloc) (size_t);
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void *(*db_realloc) (void *, size_t);
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int (*dup_compare) (const DBT *, const DBT *);
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void *dbenv;
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enum { dummy30 } type;
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void *mpf;
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void *mutexp;
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u_int8_t fileid[20];
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int32_t log_fileid;
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void *open_txn;
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void *saved_open_fhp;
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struct
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{
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void *tqh_first;
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void **tqh_last;
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} free_queue;
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struct
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{
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void *tqh_first;
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void **tqh_last;
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} active_queue;
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void *bt_internal;
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void *cj_internal;
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void *h_internal;
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void *q_internal;
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void *xa_internal;
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/* Functions. */
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int (*close) (void *, uint32_t);
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int (*cursor) (void *, void *, void **, uint32_t);
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int (*del) (void *, void *, DBT *, uint32_t);
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void (*err) (void *, int, const char *, ...);
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void (*errx) (void *, const char *, ...);
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int (*fd) (void *, int *);
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int (*get) (void *, void *, DBT *, DBT *, uint32_t);
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int (*get_byteswapped) (void *);
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int (*get_type) (void *);
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int (*join) (void *, void **, void **, uint32_t);
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int (*open) (void *, const char *, const char *, int, uint32_t, int);
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int (*put) (void *, void *, DBT *, DBT *, uint32_t);
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int (*remove) (void *, const char *, const char *, uint32_t);
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int (*set_cachesize) (void *, uint32_t, uint32_t, int);
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int (*set_dup_compare) (void *, int (*)(const DBT *, const DBT *));
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void (*set_errcall) (void *, void (*)(const char *, char *));
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void (*set_errfile) (void *, void *);
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void (*set_errpfx) (void *, const char *);
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void (*set_feedback) (void *, void (*)(void *, int, int));
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int (*set_flags) (void *, uint32_t);
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int (*set_lorder) (void *, int);
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int (*set_malloc) (void *, void *(*)(size_t));
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int (*set_pagesize) (void *, uint32_t);
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void (*set_paniccall) (void *, void (*)(void *, int));
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int (*set_realloc) (void *, void *(*)(void *, size_t));
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int (*stat) (void *, void *, void *(*)(size_t), uint32_t);
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int (*sync) (void *, uint32_t);
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int (*upgrade) (void *, const char *, uint32_t);
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int (*set_bt_compare) (void *, int (*)(const DBT *, const DBT *));
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int (*set_bt_maxkey) (void *, uint32_t);
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int (*set_bt_minkey) (void *, uint32_t);
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int (*set_bt_prefix) (void *, size_t (*)(const DBT *, const DBT *));
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int (*set_h_ffactor) (void *, uint32_t);
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int (*set_h_hash) (void *, uint32_t (*)(const void *, uint32_t));
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int (*set_h_nelem) (void *, uint32_t);
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int (*set_re_delim) (void *, int);
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int (*set_re_len) (void *, uint32_t);
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int (*set_re_pad) (void *, int);
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int (*set_re_source) (void *, const char *);
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uint32_t am_ok;
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uint32_t flags;
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};
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/* The DBC structure from version 3.0. */
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struct dbc30
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{
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void *dbp;
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void *txn;
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struct
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{
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void *tqe_next;
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void **tqe_prev;
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} links;
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uint32_t lid; /* Default process' locker id. */
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uint32_t locker; /* Locker for this operation. */
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DBT lock_dbt; /* DBT referencing lock. */
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struct
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{
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uint32_t pgno;
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uint8_t fileid[20];
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} lock;
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struct
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{
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size_t off;
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uint32_t ndx;
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uint32_t gen;
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} mylock;
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DBT rkey;
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DBT rdata;
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int (*c_close) (void *);
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int (*c_del) (void *, uint32_t);
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int (*c_dup) (void *, void **, uint32_t);
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int (*c_get) (void *, DBT *, DBT *, uint32_t);
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int (*c_put) (void *, DBT *, DBT *, uint32_t);
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int (*c_am_close) (void *);
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int (*c_am_destroy) (void *);
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void *internal;
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uint32_t flags;
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};
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