mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-17 02:20:10 +00:00
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.
95 lines
3.1 KiB
C
95 lines
3.1 KiB
C
/* Common database open/close routines for nss_db.
|
|
Copyright (C) 1999, 2000 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Library General Public License as
|
|
published by the Free Software Foundation; either version 2 of the
|
|
License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. If not,
|
|
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
#ifndef _NSS_DB_H
|
|
#define _NSS_DB_H 1
|
|
|
|
#include <nss.h>
|
|
#include <stdint.h>
|
|
|
|
/* Variables which keep track of the error values. */
|
|
extern int db_keyexist;
|
|
extern int db_notfound;
|
|
|
|
/* This flag is the same for all versions of the Berkeley DB library. */
|
|
#define DB_CREATE 0x000001
|
|
|
|
/* But constants which vary from version to version are actually
|
|
variables here. */
|
|
extern int db_first;
|
|
extern int db_next;
|
|
extern int db_nooverwrite;
|
|
extern int db_truncate;
|
|
extern int db_rdonly;
|
|
|
|
/* The `DBT' type is the same in all versions we support. */
|
|
typedef struct
|
|
{
|
|
void *data;
|
|
uint32_t size;
|
|
uint32_t ulen;
|
|
uint32_t dlen;
|
|
uint32_t doff;
|
|
uint32_t flags;
|
|
} DBT;
|
|
|
|
/* But the cursor object is very different from version to version. */
|
|
typedef struct
|
|
{
|
|
void *cursor;
|
|
int (*c_get) (void *, DBT *, DBT *, uint32_t);
|
|
} NSS_DBC;
|
|
|
|
/* We need a helper function for it. */
|
|
extern int db_cursor (void *db, void *txn, NSS_DBC **dbcp);
|
|
|
|
/* This is the wrapper we put around the `DB' structures to provide a
|
|
uniform interface to the higher-level functions. */
|
|
typedef struct
|
|
{
|
|
void *db;
|
|
int (*close) (void *, uint32_t);
|
|
int (*cursor) (void *, void *, NSS_DBC **);
|
|
int (*fd) (void *, int *);
|
|
int (*get) (void *, void *, DBT *, DBT *, uint32_t);
|
|
int (*put) (void *, void *, DBT *, DBT *, uint32_t);
|
|
} NSS_DB;
|
|
|
|
/* Open the database stored in FILE. If succesful, store the database
|
|
handle in *DBP and return NSS_STATUS_SUCCESS. On failure, return
|
|
the appropriate lookup status. */
|
|
extern enum nss_status internal_setent (const char *file, NSS_DB **dbp);
|
|
|
|
/* Close the database *DBP. */
|
|
extern void internal_endent (NSS_DB **dbp);
|
|
|
|
/* Dynamically load the Berkeley DB library. Return zero if
|
|
successful, non-zero if no suitable version of the library could be
|
|
loaded. */
|
|
extern enum nss_status load_db (void);
|
|
|
|
/* Open the database in FNAME, for access specified by FLAGS. If
|
|
opening the database causes the file FNAME to be created, it is
|
|
created with MODE. If succesful, store the database handle in *DBP
|
|
and return NSS_STATUS_SUCCESS. On failure, return the appropriate
|
|
lookup status. */
|
|
extern int dbopen (const char *fname, int oper, int mode, NSS_DB **dbp);
|
|
|
|
#endif /* nss_db.h */
|