glibc/nis/nss_nisplus/nisplus-rpc.c

405 lines
9.4 KiB
C

/* Copyright (C) 1997, 1998, 2001, 2002, 2003 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, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <nss.h>
#include <errno.h>
#include <ctype.h>
#include <string.h>
#include <bits/libc-lock.h>
#include <rpc/netdb.h>
#include <rpcsvc/nis.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) \
((res)->objects.objects_val[(idx)].EN_data.en_cols.en_cols_val[(col)].ec_value.ec_value_val)
#define NISENTRYLEN(idx,col,res) \
((res)->objects.objects_val[(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 *p, *line;
if (result == NULL)
return 0;
if ((result->status != NIS_SUCCESS && result->status != NIS_S_SUCCESS)
|| __type_of (result->objects.objects_val) != NIS_ENTRY_OBJ
|| strcmp (result->objects.objects_val[0].EN_data.en_type,
"rpc_tbl") != 0
|| result->objects.objects_val[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;
room_left -= (strlen (first_unused) + 1);
first_unused += strlen (first_unused) + 1;
rpc->r_number = atoi (NISENTRYVAL (0, 2, result));
p = first_unused;
line = p;
for (i = 0; i < result->objects.objects_len; ++i)
{
if (strcmp (NISENTRYVAL (i, 1, result), rpc->r_name) != 0)
{
if (NISENTRYLEN (i, 1, result) + 2 > room_left)
goto no_more_room;
*p++ = ' ';
p = __stpncpy (p, NISENTRYVAL (i, 1, result),
NISENTRYLEN (i, 1, result));
*p = '\0';
room_left -= (NISENTRYLEN (i, 1, result) + 1);
}
}
++p;
first_unused = p;
/* Adjust the pointer so it is aligned for
storing pointers. */
first_unused += __alignof__ (char *) - 1;
first_unused -= ((first_unused - (char *) 0) % __alignof__ (char *));
rpc->r_aliases = (char **) first_unused;
if (room_left < sizeof (char *))
goto no_more_room;
room_left -= sizeof (char *);
rpc->r_aliases[0] = NULL;
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';
++line;
++i;
}
else
rpc->r_aliases[i+1] = NULL;
}
return 1;
}
static enum nss_status
_nss_create_tablename (int *errnop)
{
if (tablename_val == NULL)
{
char buf [40 + strlen (nis_local_directory ())];
char *p;
p = __stpcpy (buf, "rpc.org_dir.");
p = __stpcpy (p, nis_local_directory ());
tablename_val = __strdup (buf);
if (tablename_val == NULL)
{
*errnop = errno;
return NSS_STATUS_TRYAGAIN;
}
tablename_len = strlen (tablename_val);
}
return NSS_STATUS_SUCCESS;
}
enum nss_status
_nss_nisplus_setrpcent (int stayopen)
{
enum nss_status status = NSS_STATUS_SUCCESS;
int err;
__libc_lock_lock (lock);
if (result)
nis_freeresult (result);
result = NULL;
if (tablename_val == NULL)
status = _nss_create_tablename (&err);
__libc_lock_unlock (lock);
return status;
}
enum nss_status
_nss_nisplus_endrpcent (void)
{
__libc_lock_lock (lock);
if (result)
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 (niserr2nss (result->status) != NSS_STATUS_SUCCESS)
return niserr2nss (result->status);
}
else
{
nis_result *res;
saved_res = result;
res = nis_next_entry (tablename_val, &result->cookie);
result = res;
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)
{
enum nss_status status = _nss_create_tablename (errnop);
if (status != NSS_STATUS_SUCCESS)
return status;
}
if (name == NULL)
return NSS_STATUS_NOTFOUND;
else
{
nis_result *result;
char buf[strlen (name) + 255 + tablename_len];
int olderr = errno;
/* Search at first in the alias list, and use the correct name
for the next search */
sprintf (buf, "[name=%s],%s", name, tablename_val);
result = nis_list (buf, FOLLOW_PATH | FOLLOW_LINKS, NULL, NULL);
if (result != NULL)
{
/* If we do 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)
sprintf (buf, "[cname=%s],%s", name, tablename_val);
else
sprintf (buf, "[cname=%s],%s", NISENTRYVAL (0, 0, result),
tablename_val);
nis_freeresult (result);
result = nis_list (buf, FOLLOW_PATH | FOLLOW_LINKS , NULL, NULL);
}
if (result == NULL)
{
*errnop = ENOMEM;
return NSS_STATUS_TRYAGAIN;
}
if (niserr2nss (result->status) != NSS_STATUS_SUCCESS)
{
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)
{
enum nss_status status = _nss_create_tablename (errnop);
if (status != NSS_STATUS_SUCCESS)
return status;
}
{
int parse_res;
nis_result *result;
char buf[100 + tablename_len];
int olderr = errno;
sprintf (buf, "[number=%d],%s", number, tablename_val);
result = nis_list(buf, FOLLOW_LINKS | FOLLOW_PATH, NULL, NULL);
if (result == NULL)
{
*errnop = ENOMEM;
return NSS_STATUS_TRYAGAIN;
}
if (niserr2nss (result->status) != NSS_STATUS_SUCCESS)
{
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;
}
else
{
__set_errno (olderr);
return NSS_STATUS_NOTFOUND;
}
}
return NSS_STATUS_SUCCESS;
}
}