446 lines
10 KiB
C
446 lines
10 KiB
C
/* Copyright (C) 1997, 1998, 2001, 2002, 2003, 2005, 2006, 2007
|
|
Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1997.
|
|
|
|
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, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <atomic.h>
|
|
#include <ctype.h>
|
|
#include <errno.h>
|
|
#include <nss.h>
|
|
#include <string.h>
|
|
#include <rpc/netdb.h>
|
|
#include <rpcsvc/nis.h>
|
|
#include <bits/libc-lock.h>
|
|
|
|
#include "nss-nisplus.h"
|
|
|
|
__libc_lock_define_initialized (static, lock)
|
|
|
|
static nis_result *result;
|
|
static nis_name tablename_val;
|
|
static u_long tablename_len;
|
|
|
|
#define NISENTRYVAL(idx, col, res) \
|
|
(NIS_RES_OBJECT (res)[idx].EN_data.en_cols.en_cols_val[col].ec_value.ec_value_val)
|
|
|
|
#define NISENTRYLEN(idx, col, res) \
|
|
(NIS_RES_OBJECT (res)[idx].EN_data.en_cols.en_cols_val[col].ec_value.ec_value_len)
|
|
|
|
|
|
static int
|
|
_nss_nisplus_parse_rpcent (nis_result *result, struct rpcent *rpc,
|
|
char *buffer, size_t buflen, int *errnop)
|
|
{
|
|
char *first_unused = buffer;
|
|
size_t room_left = buflen;
|
|
unsigned int i;
|
|
char *line;
|
|
|
|
|
|
if (result == NULL)
|
|
return 0;
|
|
|
|
if ((result->status != NIS_SUCCESS && result->status != NIS_S_SUCCESS)
|
|
|| __type_of (NIS_RES_OBJECT (result)) != NIS_ENTRY_OBJ
|
|
|| strcmp (NIS_RES_OBJECT (result)[0].EN_data.en_type, "rpc_tbl") != 0
|
|
|| NIS_RES_OBJECT (result)[0].EN_data.en_cols.en_cols_len < 3)
|
|
return 0;
|
|
|
|
if (NISENTRYLEN (0, 0, result) >= room_left)
|
|
{
|
|
no_more_room:
|
|
*errnop = ERANGE;
|
|
return -1;
|
|
}
|
|
strncpy (first_unused, NISENTRYVAL (0, 0, result),
|
|
NISENTRYLEN (0, 0, result));
|
|
first_unused[NISENTRYLEN (0, 0, result)] = '\0';
|
|
rpc->r_name = first_unused;
|
|
size_t len = strlen (first_unused) + 1;
|
|
room_left -= len;
|
|
first_unused += len;
|
|
|
|
rpc->r_number = atoi (NISENTRYVAL (0, 2, result));
|
|
|
|
/* XXX Rewrite at some point to allocate the array first and then
|
|
copy the strings. It wasteful to first concatenate the strings
|
|
to just split them again later. */
|
|
line = first_unused;
|
|
for (i = 0; i < NIS_RES_NUMOBJ (result); ++i)
|
|
{
|
|
if (strcmp (NISENTRYVAL (i, 1, result), rpc->r_name) != 0)
|
|
{
|
|
if (NISENTRYLEN (i, 1, result) + 2 > room_left)
|
|
goto no_more_room;
|
|
*first_unused++ = ' ';
|
|
first_unused = __stpncpy (first_unused, NISENTRYVAL (i, 1, result),
|
|
NISENTRYLEN (i, 1, result));
|
|
room_left -= NISENTRYLEN (i, 1, result) + 1;
|
|
}
|
|
}
|
|
*first_unused++ = '\0';
|
|
|
|
/* Adjust the pointer so it is aligned for
|
|
storing pointers. */
|
|
size_t adjust = ((__alignof__ (char *)
|
|
- (first_unused - (char *) 0) % __alignof__ (char *))
|
|
% __alignof__ (char *));
|
|
if (room_left < adjust + sizeof (char *))
|
|
goto no_more_room;
|
|
first_unused += adjust;
|
|
room_left -= adjust;
|
|
rpc->r_aliases = (char **) first_unused;
|
|
|
|
/* For the terminating NULL pointer. */
|
|
room_left -= sizeof (char *);
|
|
|
|
i = 0;
|
|
while (*line != '\0')
|
|
{
|
|
/* Skip leading blanks. */
|
|
while (isspace (*line))
|
|
++line;
|
|
|
|
if (*line == '\0')
|
|
break;
|
|
|
|
if (room_left < sizeof (char *))
|
|
goto no_more_room;
|
|
|
|
room_left -= sizeof (char *);
|
|
rpc->r_aliases[i++] = line;
|
|
|
|
while (*line != '\0' && *line != ' ')
|
|
++line;
|
|
|
|
if (*line == ' ')
|
|
*line++ = '\0';
|
|
}
|
|
rpc->r_aliases[i] = NULL;
|
|
|
|
return 1;
|
|
}
|
|
|
|
|
|
static enum nss_status
|
|
_nss_create_tablename (int *errnop)
|
|
{
|
|
if (tablename_val == NULL)
|
|
{
|
|
const char *local_dir = nis_local_directory ();
|
|
size_t local_dir_len = strlen (local_dir);
|
|
static const char prefix[] = "rpc.org_dir.";
|
|
|
|
char *p = malloc (sizeof (prefix) + local_dir_len);
|
|
if (p == NULL)
|
|
{
|
|
*errnop = errno;
|
|
return NSS_STATUS_TRYAGAIN;
|
|
}
|
|
|
|
memcpy (__stpcpy (p, prefix), local_dir, local_dir_len + 1);
|
|
|
|
tablename_len = sizeof (prefix) - 1 + local_dir_len;
|
|
|
|
atomic_write_barrier ();
|
|
|
|
tablename_val = p;
|
|
}
|
|
|
|
return NSS_STATUS_SUCCESS;
|
|
}
|
|
|
|
|
|
enum nss_status
|
|
_nss_nisplus_setrpcent (int stayopen)
|
|
{
|
|
enum nss_status status = NSS_STATUS_SUCCESS;
|
|
|
|
__libc_lock_lock (lock);
|
|
|
|
if (result != NULL)
|
|
{
|
|
nis_freeresult (result);
|
|
result = NULL;
|
|
}
|
|
|
|
if (tablename_val == NULL)
|
|
{
|
|
int err;
|
|
status = _nss_create_tablename (&err);
|
|
}
|
|
|
|
__libc_lock_unlock (lock);
|
|
|
|
return status;
|
|
}
|
|
|
|
enum nss_status
|
|
_nss_nisplus_endrpcent (void)
|
|
{
|
|
__libc_lock_lock (lock);
|
|
|
|
if (result != NULL)
|
|
{
|
|
nis_freeresult (result);
|
|
result = NULL;
|
|
}
|
|
|
|
__libc_lock_unlock (lock);
|
|
|
|
return NSS_STATUS_SUCCESS;
|
|
}
|
|
|
|
static enum nss_status
|
|
internal_nisplus_getrpcent_r (struct rpcent *rpc, char *buffer,
|
|
size_t buflen, int *errnop)
|
|
{
|
|
int parse_res;
|
|
|
|
/* Get the next entry until we found a correct one. */
|
|
do
|
|
{
|
|
nis_result *saved_res;
|
|
|
|
if (result == NULL)
|
|
{
|
|
saved_res = NULL;
|
|
if (tablename_val == NULL)
|
|
{
|
|
enum nss_status status = _nss_create_tablename (errnop);
|
|
|
|
if (status != NSS_STATUS_SUCCESS)
|
|
return status;
|
|
}
|
|
|
|
result = nis_first_entry (tablename_val);
|
|
if (result == NULL)
|
|
{
|
|
*errnop = errno;
|
|
return NSS_STATUS_TRYAGAIN;
|
|
}
|
|
if (niserr2nss (result->status) != NSS_STATUS_SUCCESS)
|
|
return niserr2nss (result->status);
|
|
}
|
|
else
|
|
{
|
|
saved_res = result;
|
|
result = nis_next_entry (tablename_val, &result->cookie);
|
|
if (result == NULL)
|
|
{
|
|
*errnop = errno;
|
|
return NSS_STATUS_TRYAGAIN;
|
|
}
|
|
if (niserr2nss (result->status) != NSS_STATUS_SUCCESS)
|
|
{
|
|
nis_freeresult (saved_res);
|
|
return niserr2nss (result->status);
|
|
}
|
|
}
|
|
|
|
parse_res = _nss_nisplus_parse_rpcent (result, rpc, buffer,
|
|
buflen, errnop);
|
|
if (parse_res == -1)
|
|
{
|
|
nis_freeresult (result);
|
|
result = saved_res;
|
|
*errnop = ERANGE;
|
|
return NSS_STATUS_TRYAGAIN;
|
|
}
|
|
else
|
|
{
|
|
if (saved_res)
|
|
nis_freeresult (saved_res);
|
|
}
|
|
}
|
|
while (!parse_res);
|
|
|
|
return NSS_STATUS_SUCCESS;
|
|
}
|
|
|
|
enum nss_status
|
|
_nss_nisplus_getrpcent_r (struct rpcent *result, char *buffer,
|
|
size_t buflen, int *errnop)
|
|
{
|
|
int status;
|
|
|
|
__libc_lock_lock (lock);
|
|
|
|
status = internal_nisplus_getrpcent_r (result, buffer, buflen, errnop);
|
|
|
|
__libc_lock_unlock (lock);
|
|
|
|
return status;
|
|
}
|
|
|
|
enum nss_status
|
|
_nss_nisplus_getrpcbyname_r (const char *name, struct rpcent *rpc,
|
|
char *buffer, size_t buflen, int *errnop)
|
|
{
|
|
int parse_res;
|
|
|
|
if (tablename_val == NULL)
|
|
{
|
|
__libc_lock_lock (lock);
|
|
|
|
enum nss_status status = _nss_create_tablename (errnop);
|
|
|
|
__libc_lock_unlock (lock);
|
|
|
|
if (status != NSS_STATUS_SUCCESS)
|
|
return status;
|
|
}
|
|
|
|
if (name == NULL)
|
|
return NSS_STATUS_NOTFOUND;
|
|
|
|
char buf[strlen (name) + 10 + tablename_len];
|
|
int olderr = errno;
|
|
|
|
/* Search at first in the alias list, and use the correct name
|
|
for the next search */
|
|
snprintf (buf, sizeof (buf), "[name=%s],%s", name, tablename_val);
|
|
nis_result *result = nis_list (buf, FOLLOW_PATH | FOLLOW_LINKS | USE_DGRAM,
|
|
NULL, NULL);
|
|
|
|
if (result != NULL)
|
|
{
|
|
char *bufptr = buf;
|
|
|
|
/* If we did not find it, try it as original name. But if the
|
|
database is correct, we should find it in the first case, too */
|
|
if ((result->status != NIS_SUCCESS
|
|
&& result->status != NIS_S_SUCCESS)
|
|
|| __type_of (result->objects.objects_val) != NIS_ENTRY_OBJ
|
|
|| strcmp (result->objects.objects_val->EN_data.en_type,
|
|
"rpc_tbl") != 0
|
|
|| result->objects.objects_val->EN_data.en_cols.en_cols_len < 3)
|
|
snprintf (buf, sizeof (buf), "[cname=%s],%s", name, tablename_val);
|
|
else
|
|
{
|
|
/* We need to allocate a new buffer since there is no
|
|
guarantee the returned name has a length limit. */
|
|
const char *entryval = NISENTRYVAL (0, 0, result);
|
|
size_t buflen = strlen (entryval) + 10 + tablename_len;
|
|
bufptr = alloca (buflen);
|
|
snprintf (bufptr, buflen, "[cname=%s],%s",
|
|
entryval, tablename_val);
|
|
}
|
|
|
|
nis_freeresult (result);
|
|
result = nis_list (bufptr, FOLLOW_PATH | FOLLOW_LINKS | USE_DGRAM,
|
|
NULL, NULL);
|
|
}
|
|
|
|
if (result == NULL)
|
|
{
|
|
*errnop = ENOMEM;
|
|
return NSS_STATUS_TRYAGAIN;
|
|
}
|
|
|
|
if (__builtin_expect (niserr2nss (result->status) != NSS_STATUS_SUCCESS, 0))
|
|
{
|
|
enum nss_status status = niserr2nss (result->status);
|
|
|
|
__set_errno (olderr);
|
|
|
|
nis_freeresult (result);
|
|
return status;
|
|
}
|
|
|
|
parse_res = _nss_nisplus_parse_rpcent (result, rpc, buffer, buflen,
|
|
errnop);
|
|
|
|
nis_freeresult (result);
|
|
|
|
if (parse_res < 1)
|
|
{
|
|
if (parse_res == -1)
|
|
{
|
|
*errnop = ERANGE;
|
|
return NSS_STATUS_TRYAGAIN;
|
|
}
|
|
|
|
__set_errno (olderr);
|
|
return NSS_STATUS_NOTFOUND;
|
|
}
|
|
|
|
return NSS_STATUS_SUCCESS;
|
|
}
|
|
|
|
enum nss_status
|
|
_nss_nisplus_getrpcbynumber_r (const int number, struct rpcent *rpc,
|
|
char *buffer, size_t buflen, int *errnop)
|
|
{
|
|
if (tablename_val == NULL)
|
|
{
|
|
__libc_lock_lock (lock);
|
|
|
|
enum nss_status status = _nss_create_tablename (errnop);
|
|
|
|
__libc_lock_unlock (lock);
|
|
|
|
if (status != NSS_STATUS_SUCCESS)
|
|
return status;
|
|
}
|
|
|
|
char buf[12 + 3 * sizeof (number) + tablename_len];
|
|
int olderr = errno;
|
|
|
|
snprintf (buf, sizeof (buf), "[number=%d],%s", number, tablename_val);
|
|
|
|
nis_result *result = nis_list (buf, FOLLOW_LINKS | FOLLOW_PATH | USE_DGRAM,
|
|
NULL, NULL);
|
|
|
|
if (result == NULL)
|
|
{
|
|
*errnop = ENOMEM;
|
|
return NSS_STATUS_TRYAGAIN;
|
|
}
|
|
|
|
if (__builtin_expect (niserr2nss (result->status) != NSS_STATUS_SUCCESS, 0))
|
|
{
|
|
enum nss_status status = niserr2nss (result->status);
|
|
|
|
__set_errno (olderr);
|
|
|
|
nis_freeresult (result);
|
|
return status;
|
|
}
|
|
|
|
int parse_res = _nss_nisplus_parse_rpcent (result, rpc, buffer, buflen,
|
|
errnop);
|
|
|
|
nis_freeresult (result);
|
|
|
|
if (parse_res < 1)
|
|
{
|
|
if (parse_res == -1)
|
|
{
|
|
*errnop = ERANGE;
|
|
return NSS_STATUS_TRYAGAIN;
|
|
}
|
|
else
|
|
{
|
|
__set_errno (olderr);
|
|
return NSS_STATUS_NOTFOUND;
|
|
}
|
|
}
|
|
|
|
return NSS_STATUS_SUCCESS;
|
|
}
|