mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-24 14:00:30 +00:00
2666d441c2
No longer is Berkeley db used. Instead a simple hash function is used. The database files are not updated once they are created and therefore no complicated database is needed.
122 lines
3.3 KiB
C
122 lines
3.3 KiB
C
/* Netgroup file parser in nss_db modules.
|
||
Copyright (C) 1996, 1997, 1999, 2000, 2011 Free Software Foundation, Inc.
|
||
This file is part of the GNU C Library.
|
||
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
|
||
|
||
The GNU C Library is free software; you can redistribute it and/or
|
||
modify it under the terms of the GNU Lesser General Public
|
||
License as published by the Free Software Foundation; either
|
||
version 2.1 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
|
||
Lesser General Public License for more details.
|
||
|
||
You should have received a copy of the GNU Lesser General Public
|
||
License along with the GNU C Library; if not, write to the Free
|
||
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
||
02111-1307 USA. */
|
||
|
||
#include <ctype.h>
|
||
#include <dlfcn.h>
|
||
#include <errno.h>
|
||
#include <fcntl.h>
|
||
#include <netgroup.h>
|
||
#include <string.h>
|
||
#include <bits/libc-lock.h>
|
||
#include <paths.h>
|
||
|
||
#include "nsswitch.h"
|
||
#include "nss_db.h"
|
||
|
||
/* The hashing function we use. */
|
||
#include "../intl/hash-string.h"
|
||
|
||
|
||
#define DBFILE _PATH_VARDB "netgroup.db"
|
||
|
||
/* Maintenance of the shared handle open on the database. */
|
||
enum nss_status
|
||
_nss_db_setnetgrent (const char *group, struct __netgrent *result)
|
||
{
|
||
struct nss_db_map state;
|
||
enum nss_status status = internal_setent (DBFILE, &state);
|
||
|
||
if (status == NSS_STATUS_SUCCESS)
|
||
{
|
||
const struct nss_db_header *header = state.header;
|
||
const stridx_t *hashtable
|
||
= (const stridx_t *) ((const char *) header
|
||
+ header->dbs[0].hashoffset);
|
||
const char *valstrtab = (const char *) header + header->valstroffset;
|
||
uint32_t hashval = __hash_string (group);
|
||
size_t grouplen = strlen (group);
|
||
size_t hidx = hashval % header->dbs[0].hashsize;
|
||
size_t hval2 = 1 + hashval % (header->dbs[0].hashsize - 2);
|
||
|
||
status = NSS_STATUS_NOTFOUND;
|
||
while (hashtable[hidx] != ~((stridx_t) 0))
|
||
{
|
||
const char *valstr = valstrtab + hashtable[hidx];
|
||
|
||
if (strncmp (valstr, group, grouplen) == 0
|
||
&& isblank (valstr[grouplen]))
|
||
{
|
||
const char *cp = &valstr[grouplen + 1];
|
||
while (isblank (*cp))
|
||
++cp;
|
||
if (*cp != '\0')
|
||
{
|
||
result->data = strdup (cp);
|
||
if (result->data == NULL)
|
||
status = NSS_STATUS_TRYAGAIN;
|
||
else
|
||
{
|
||
status = NSS_STATUS_SUCCESS;
|
||
result->cursor = result->data;
|
||
}
|
||
break;
|
||
}
|
||
}
|
||
|
||
if ((hidx += hval2) >= header->dbs[0].hashsize)
|
||
hidx -= header->dbs[0].hashsize;
|
||
}
|
||
|
||
internal_endent (&state);
|
||
}
|
||
|
||
return status;
|
||
|
||
}
|
||
|
||
|
||
enum nss_status
|
||
_nss_db_endnetgrent (struct __netgrent *result)
|
||
{
|
||
free (result->data);
|
||
result->data = NULL;
|
||
result->data_size = 0;
|
||
result->cursor = NULL;
|
||
return NSS_STATUS_SUCCESS;
|
||
}
|
||
|
||
|
||
extern enum nss_status _nss_netgroup_parseline (char **cursor,
|
||
struct __netgrent *result,
|
||
char *buffer, size_t buflen,
|
||
int *errnop);
|
||
|
||
enum nss_status
|
||
_nss_db_getnetgrent_r (struct __netgrent *result, char *buffer, size_t buflen,
|
||
int *errnop)
|
||
{
|
||
enum nss_status status;
|
||
|
||
status = _nss_netgroup_parseline (&result->cursor, result, buffer, buflen,
|
||
errnop);
|
||
|
||
return status;
|
||
}
|