glibc/nis/nis_table.c
Ulrich Drepper bd1ebae0eb * nis/nis_call.c: Minor cleanups throughout.
(rec_dirsearch) [HIGHER_NAME]: Correctly size ndomain array.
	(first_shoot): Add search_parent_first parameter.  Only if it is set
	search parent server first.
	If directory for table found through cold start cache is not the same
	as referenced in the cache, don't use it.
	(__nisfind_server): Take additional parameter.  Pass it on to
	first_shoot.
	(__prepare_niscall): Adjust __nisfind_server call.
	* nis/rpcsvc/nislib.h: Adjust __nisfind_server prototype.
	* nis/nis_table.c: Adjust __nisfind_server call.
	* nis/nis_lookup.c: Likewise.
	(nis_lookup): Don't loop endlessly if name is reduced to ".".
2006-08-07 16:03:46 +00:00

743 lines
18 KiB
C

/* Copyright (c) 1997-1999,2003,2004,2005,2006 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Thorsten Kukuk <kukuk@suse.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 <assert.h>
#include <string.h>
#include <rpcsvc/nis.h>
#include "nis_xdr.h"
#include "nis_intern.h"
#include "libnsl.h"
struct ib_request *
__create_ib_request (const_nis_name name, unsigned int flags)
{
struct ib_request *ibreq = calloc (1, sizeof (struct ib_request));
nis_attr *search_val = NULL;
size_t search_len = 0;
size_t size = 0;
if (ibreq == NULL)
return NULL;
ibreq->ibr_flags = flags;
char *cptr = strdupa (name);
/* Not of "[key=value,key=value,...],foo.." format? */
if (cptr[0] != '[')
{
ibreq->ibr_name = strdup (cptr);
if (ibreq->ibr_name == NULL)
{
free (ibreq);
return NULL;
}
return ibreq;
}
/* "[key=value,...],foo" format */
ibreq->ibr_name = strchr (cptr, ']');
if (ibreq->ibr_name == NULL || ibreq->ibr_name[1] != ',')
{
/* The object has not really been built yet so we use free. */
free (ibreq);
return NULL;
}
/* Check if we have an entry of "[key=value,],bar". If, remove the "," */
if (ibreq->ibr_name[-1] == ',')
ibreq->ibr_name[-1] = '\0';
else
ibreq->ibr_name[0] = '\0';
ibreq->ibr_name += 2;
ibreq->ibr_name = strdup (ibreq->ibr_name);
if (ibreq->ibr_name == NULL)
{
free_null:
while (search_len-- > 0)
{
free (search_val[search_len].zattr_ndx);
free (search_val[search_len].zattr_val.zattr_val_val);
}
free (search_val);
nis_free_request (ibreq);
return NULL;
}
++cptr; /* Remove "[" */
while (cptr != NULL && cptr[0] != '\0')
{
char *key = cptr;
char *val = strchr (cptr, '=');
cptr = strchr (key, ',');
if (cptr != NULL)
*cptr++ = '\0';
if (__builtin_expect (val == NULL, 0))
{
nis_free_request (ibreq);
return NULL;
}
*val++ = '\0';
if (search_len + 1 >= size)
{
size += 1;
nis_attr *newp = realloc (search_val, size * sizeof (nis_attr));
if (newp == NULL)
goto free_null;
search_val = newp;
}
search_val[search_len].zattr_ndx = strdup (key);
if (search_val[search_len].zattr_ndx == NULL)
goto free_null;
search_val[search_len].zattr_val.zattr_val_len = strlen (val) + 1;
search_val[search_len].zattr_val.zattr_val_val = strdup (val);
if (search_val[search_len].zattr_val.zattr_val_val == NULL)
{
free (search_val[search_len].zattr_ndx);
goto free_null;
}
++search_len;
}
ibreq->ibr_srch.ibr_srch_val = search_val;
ibreq->ibr_srch.ibr_srch_len = search_len;
return ibreq;
}
libnsl_hidden_def (__create_ib_request)
static const struct timeval RPCTIMEOUT = {10, 0};
static char *
get_tablepath (char *name, dir_binding *bptr)
{
enum clnt_stat result;
nis_result res;
struct ns_request req;
memset (&res, '\0', sizeof (res));
req.ns_name = name;
req.ns_object.ns_object_len = 0;
req.ns_object.ns_object_val = NULL;
result = clnt_call (bptr->clnt, NIS_LOOKUP, (xdrproc_t) _xdr_ns_request,
(caddr_t) &req, (xdrproc_t) _xdr_nis_result,
(caddr_t) &res, RPCTIMEOUT);
const char *cptr;
if (result == RPC_SUCCESS && NIS_RES_STATUS (&res) == NIS_SUCCESS
&& __type_of (NIS_RES_OBJECT (&res)) == NIS_TABLE_OBJ)
cptr = NIS_RES_OBJECT (&res)->TA_data.ta_path;
else
cptr = "";
char *str = strdup (cptr);
if (result == RPC_SUCCESS)
xdr_free ((xdrproc_t) _xdr_nis_result, (char *) &res);
return str;
}
nis_error
__follow_path (char **tablepath, char **tableptr, struct ib_request *ibreq,
dir_binding *bptr)
{
if (*tablepath == NULL)
{
*tablepath = get_tablepath (ibreq->ibr_name, bptr);
if (*tablepath == NULL)
return NIS_NOMEMORY;
*tableptr = *tablepath;
}
if (*tableptr == NULL)
return NIS_NOTFOUND;
char *newname = strsep (tableptr, ":");
if (newname[0] == '\0')
return NIS_NOTFOUND;
newname = strdup (newname);
if (newname == NULL)
return NIS_NOMEMORY;
free (ibreq->ibr_name);
ibreq->ibr_name = newname;
return NIS_SUCCESS;
}
libnsl_hidden_def (__follow_path)
nis_result *
nis_list (const_nis_name name, unsigned int flags,
int (*callback) (const_nis_name name,
const nis_object *object,
const void *userdata),
const void *userdata)
{
nis_result *res = malloc (sizeof (nis_result));
ib_request *ibreq;
int status;
enum clnt_stat clnt_status;
int count_links = 0; /* We will only follow NIS_MAXLINKS links! */
int done = 0;
nis_name *names;
nis_name namebuf[2] = {NULL, NULL};
int name_nr = 0;
nis_cb *cb = NULL;
char *tableptr;
char *tablepath = NULL;
int first_try = 0; /* Do we try the old binding at first ? */
if (res == NULL)
return NULL;
if (name == NULL)
{
status = NIS_BADNAME;
err_out:
memset (res, '\0', sizeof (nis_result));
NIS_RES_STATUS (res) = status;
return res;
}
ibreq = __create_ib_request (name, flags);
if (ibreq == NULL)
{
status = NIS_BADNAME;
goto err_out;
}
if ((flags & EXPAND_NAME)
&& ibreq->ibr_name[strlen (ibreq->ibr_name) - 1] != '.')
{
names = nis_getnames (ibreq->ibr_name);
free (ibreq->ibr_name);
ibreq->ibr_name = NULL;
if (names == NULL)
{
nis_free_request (ibreq);
status = NIS_BADNAME;
goto err_out;
}
ibreq->ibr_name = strdup (names[name_nr]);
if (ibreq->ibr_name == NULL)
{
nis_freenames (names);
nis_free_request (ibreq);
status = NIS_NOMEMORY;
goto err_out;
}
}
else
{
names = namebuf;
names[name_nr] = ibreq->ibr_name;
}
cb = NULL;
while (!done)
{
dir_binding bptr;
directory_obj *dir = NULL;
memset (res, '\0', sizeof (nis_result));
status = __nisfind_server (ibreq->ibr_name,
ibreq->ibr_srch.ibr_srch_val != NULL, &dir);
if (status != NIS_SUCCESS)
{
NIS_RES_STATUS (res) = status;
goto fail3;
}
status = __nisbind_create (&bptr, dir->do_servers.do_servers_val,
dir->do_servers.do_servers_len, flags);
if (__builtin_expect (status != NIS_SUCCESS, 0))
{
NIS_RES_STATUS (res) = status;
goto fail2;
}
while (__nisbind_connect (&bptr) != NIS_SUCCESS)
if (__builtin_expect (__nisbind_next (&bptr) != NIS_SUCCESS, 0))
{
NIS_RES_STATUS (res) = NIS_NAMEUNREACHABLE;
goto fail;
}
if (callback != NULL)
{
assert (cb == NULL);
cb = __nis_create_callback (callback, userdata, flags);
ibreq->ibr_cbhost.ibr_cbhost_len = 1;
ibreq->ibr_cbhost.ibr_cbhost_val = cb->serv;
}
again:
clnt_status = clnt_call (bptr.clnt, NIS_IBLIST,
(xdrproc_t) _xdr_ib_request, (caddr_t) ibreq,
(xdrproc_t) _xdr_nis_result,
(caddr_t) res, RPCTIMEOUT);
if (__builtin_expect (clnt_status != RPC_SUCCESS, 0))
NIS_RES_STATUS (res) = NIS_RPCERROR;
else
switch (NIS_RES_STATUS (res))
{ /* start switch */
case NIS_PARTIAL:
case NIS_SUCCESS:
case NIS_S_SUCCESS:
if (__type_of (NIS_RES_OBJECT (res)) == NIS_LINK_OBJ
&& (flags & FOLLOW_LINKS)) /* We are following links. */
{
free (ibreq->ibr_name);
ibreq->ibr_name = NULL;
/* If we hit the link limit, bail. */
if (__builtin_expect (count_links > NIS_MAXLINKS, 0))
{
NIS_RES_STATUS (res) = NIS_LINKNAMEERROR;
++done;
break;
}
++count_links;
ibreq->ibr_name =
strdup (NIS_RES_OBJECT (res)->LI_data.li_name);
if (ibreq->ibr_name == NULL)
{
NIS_RES_STATUS (res) = NIS_NOMEMORY;
fail:
__nisbind_destroy (&bptr);
fail2:
nis_free_directory (dir);
fail3:
free (tablepath);
if (cb)
{
__nis_destroy_callback (cb);
ibreq->ibr_cbhost.ibr_cbhost_len = 0;
ibreq->ibr_cbhost.ibr_cbhost_val = NULL;
}
if (names != namebuf)
nis_freenames (names);
nis_free_request (ibreq);
return res;
}
if (NIS_RES_OBJECT (res)->LI_data.li_attrs.li_attrs_len)
if (ibreq->ibr_srch.ibr_srch_len == 0)
{
ibreq->ibr_srch.ibr_srch_len =
NIS_RES_OBJECT (res)->LI_data.li_attrs.li_attrs_len;
ibreq->ibr_srch.ibr_srch_val =
NIS_RES_OBJECT (res)->LI_data.li_attrs.li_attrs_val;
}
/* The following is a non-obvious optimization. A
nis_freeresult call would call xdr_free as the
following code. But it also would unnecessarily
free the result structure. We avoid this here
along with the necessary tests. */
xdr_free ((xdrproc_t) _xdr_nis_result, (char *)res);
memset (res, '\0', sizeof (*res));
first_try = 1; /* Try at first the old binding */
goto again;
}
else if ((flags & FOLLOW_PATH)
&& NIS_RES_STATUS (res) == NIS_PARTIAL)
{
clnt_status = __follow_path (&tablepath, &tableptr, ibreq,
&bptr);
if (clnt_status != NIS_SUCCESS)
{
NIS_RES_STATUS (res) = clnt_status;
++done;
}
else
{
/* The following is a non-obvious optimization. A
nis_freeresult call would call xdr_free as the
following code. But it also would unnecessarily
free the result structure. We avoid this here
along with the necessary tests. */
xdr_free ((xdrproc_t) _xdr_nis_result, (char *) res);
memset (res, '\0', sizeof (*res));
first_try = 1;
goto again;
}
}
else
++done;
break;
case NIS_CBRESULTS:
if (cb != NULL)
{
__nis_do_callback (&bptr, &res->cookie, cb);
NIS_RES_STATUS (res) = cb->result;
if (!(flags & ALL_RESULTS))
++done;
else
{
NIS_RES_STATUS (res)
= __follow_path (&tablepath, &tableptr, ibreq, &bptr);
if (NIS_RES_STATUS (res) != NIS_SUCCESS)
++done;
}
}
break;
case NIS_SYSTEMERROR:
case NIS_NOSUCHNAME:
case NIS_NOT_ME:
/* If we had first tried the old binding, do nothing, but
get a new binding */
if (!first_try)
{
if (__nisbind_next (&bptr) != NIS_SUCCESS)
{
++done;
break; /* No more servers to search */
}
while (__nisbind_connect (&bptr) != NIS_SUCCESS)
{
if (__nisbind_next (&bptr) != NIS_SUCCESS)
{
++done;
break; /* No more servers to search */
}
}
goto again;
}
break;
default:
if (!first_try)
{
/* Try the next domainname if we don't follow a link. */
free (ibreq->ibr_name);
ibreq->ibr_name = NULL;
if (__builtin_expect (count_links, 0))
{
NIS_RES_STATUS (res) = NIS_LINKNAMEERROR;
++done;
break;
}
++name_nr;
if (names[name_nr] == NULL)
{
++done;
break;
}
ibreq->ibr_name = strdup (names[name_nr]);
if (ibreq->ibr_name == NULL)
{
NIS_RES_STATUS (res) = NIS_NOMEMORY;
goto fail;
}
first_try = 1; /* Try old binding at first */
goto again;
}
break;
}
first_try = 0;
if (cb)
{
__nis_destroy_callback (cb);
ibreq->ibr_cbhost.ibr_cbhost_len = 0;
ibreq->ibr_cbhost.ibr_cbhost_val = NULL;
cb = NULL;
}
__nisbind_destroy (&bptr);
nis_free_directory (dir);
}
free (tablepath);
if (names != namebuf)
nis_freenames (names);
nis_free_request (ibreq);
return res;
}
libnsl_hidden_def (nis_list)
nis_result *
nis_add_entry (const_nis_name name, const nis_object *obj2, unsigned int flags)
{
nis_result *res = calloc (1, sizeof (nis_result));
if (res == NULL)
return NULL;
if (name == NULL)
{
NIS_RES_STATUS (res) = NIS_BADNAME;
return res;
}
ib_request *ibreq = __create_ib_request (name, flags);
if (ibreq == NULL)
{
NIS_RES_STATUS (res) = NIS_BADNAME;
return res;
}
nis_object obj;
memcpy (&obj, obj2, sizeof (nis_object));
size_t namelen = strlen (name);
char buf1[namelen + 20];
char buf4[namelen + 20];
if (obj.zo_name == NULL || strlen (obj.zo_name) == 0)
obj.zo_name = nis_leaf_of_r (name, buf1, sizeof (buf1));
if (obj.zo_owner == NULL || strlen (obj.zo_owner) == 0)
obj.zo_owner = nis_local_principal ();
if (obj.zo_group == NULL || strlen (obj.zo_group) == 0)
obj.zo_group = nis_local_group ();
obj.zo_domain = nis_domain_of_r (name, buf4, sizeof (buf4));
ibreq->ibr_obj.ibr_obj_val = nis_clone_object (&obj, NULL);
if (ibreq->ibr_obj.ibr_obj_val == NULL)
{
nis_free_request (ibreq);
NIS_RES_STATUS (res) = NIS_NOMEMORY;
return res;
}
ibreq->ibr_obj.ibr_obj_len = 1;
nis_error status = __do_niscall (ibreq->ibr_name, NIS_IBADD,
(xdrproc_t) _xdr_ib_request,
(caddr_t) ibreq,
(xdrproc_t) _xdr_nis_result,
(caddr_t) res, 0, NULL);
if (__builtin_expect (status != NIS_SUCCESS, 0))
NIS_RES_STATUS (res) = status;
nis_free_request (ibreq);
return res;
}
nis_result *
nis_modify_entry (const_nis_name name, const nis_object *obj2,
unsigned int flags)
{
nis_object obj;
nis_result *res;
nis_error status;
ib_request *ibreq;
size_t namelen = strlen (name);
char buf1[namelen + 20];
char buf4[namelen + 20];
res = calloc (1, sizeof (nis_result));
if (res == NULL)
return NULL;
ibreq = __create_ib_request (name, flags);
if (ibreq == NULL)
{
NIS_RES_STATUS (res) = NIS_BADNAME;
return res;
}
memcpy (&obj, obj2, sizeof (nis_object));
if (obj.zo_name == NULL || strlen (obj.zo_name) == 0)
obj.zo_name = nis_leaf_of_r (name, buf1, sizeof (buf1));
if (obj.zo_owner == NULL || strlen (obj.zo_owner) == 0)
obj.zo_owner = nis_local_principal ();
if (obj.zo_group == NULL || strlen (obj.zo_group) == 0)
obj.zo_group = nis_local_group ();
obj.zo_domain = nis_domain_of_r (name, buf4, sizeof (buf4));
ibreq->ibr_obj.ibr_obj_val = nis_clone_object (&obj, NULL);
if (ibreq->ibr_obj.ibr_obj_val == NULL)
{
nis_free_request (ibreq);
NIS_RES_STATUS (res) = NIS_NOMEMORY;
return res;
}
ibreq->ibr_obj.ibr_obj_len = 1;
status = __do_niscall (ibreq->ibr_name, NIS_IBMODIFY,
(xdrproc_t) _xdr_ib_request,
(caddr_t) ibreq, (xdrproc_t) _xdr_nis_result,
(caddr_t) res, 0, NULL);
if (__builtin_expect (status != NIS_SUCCESS, 0))
NIS_RES_STATUS (res) = status;
nis_free_request (ibreq);
return res;
}
nis_result *
nis_remove_entry (const_nis_name name, const nis_object *obj,
unsigned int flags)
{
nis_result *res;
ib_request *ibreq;
nis_error status;
res = calloc (1, sizeof (nis_result));
if (res == NULL)
return NULL;
if (name == NULL)
{
NIS_RES_STATUS (res) = NIS_BADNAME;
return res;
}
ibreq = __create_ib_request (name, flags);
if (ibreq == NULL)
{
NIS_RES_STATUS (res) = NIS_BADNAME;
return res;
}
if (obj != NULL)
{
ibreq->ibr_obj.ibr_obj_val = nis_clone_object (obj, NULL);
if (ibreq->ibr_obj.ibr_obj_val == NULL)
{
nis_free_request (ibreq);
NIS_RES_STATUS (res) = NIS_NOMEMORY;
return res;
}
ibreq->ibr_obj.ibr_obj_len = 1;
}
if ((status = __do_niscall (ibreq->ibr_name, NIS_IBREMOVE,
(xdrproc_t) _xdr_ib_request,
(caddr_t) ibreq, (xdrproc_t) _xdr_nis_result,
(caddr_t) res, 0, NULL)) != NIS_SUCCESS)
NIS_RES_STATUS (res) = status;
nis_free_request (ibreq);
return res;
}
nis_result *
nis_first_entry (const_nis_name name)
{
nis_result *res;
ib_request *ibreq;
nis_error status;
res = calloc (1, sizeof (nis_result));
if (res == NULL)
return NULL;
if (name == NULL)
{
NIS_RES_STATUS (res) = NIS_BADNAME;
return res;
}
ibreq = __create_ib_request (name, 0);
if (ibreq == NULL)
{
NIS_RES_STATUS (res) = NIS_BADNAME;
return res;
}
status = __do_niscall (ibreq->ibr_name, NIS_IBFIRST,
(xdrproc_t) _xdr_ib_request,
(caddr_t) ibreq, (xdrproc_t) _xdr_nis_result,
(caddr_t) res, 0, NULL);
if (__builtin_expect (status != NIS_SUCCESS, 0))
NIS_RES_STATUS (res) = status;
nis_free_request (ibreq);
return res;
}
nis_result *
nis_next_entry (const_nis_name name, const netobj *cookie)
{
nis_result *res;
ib_request *ibreq;
nis_error status;
res = calloc (1, sizeof (nis_result));
if (res == NULL)
return NULL;
if (name == NULL)
{
NIS_RES_STATUS (res) = NIS_BADNAME;
return res;
}
ibreq = __create_ib_request (name, 0);
if (ibreq == NULL)
{
NIS_RES_STATUS (res) = NIS_BADNAME;
return res;
}
if (cookie != NULL)
{
ibreq->ibr_cookie.n_bytes = cookie->n_bytes;
ibreq->ibr_cookie.n_len = cookie->n_len;
}
status = __do_niscall (ibreq->ibr_name, NIS_IBNEXT,
(xdrproc_t) _xdr_ib_request,
(caddr_t) ibreq, (xdrproc_t) _xdr_nis_result,
(caddr_t) res, 0, NULL);
if (__builtin_expect (status != NIS_SUCCESS, 0))
NIS_RES_STATUS (res) = status;
if (cookie != NULL)
{
/* Don't give cookie free, it is not from us */
ibreq->ibr_cookie.n_bytes = NULL;
ibreq->ibr_cookie.n_len = 0;
}
nis_free_request (ibreq);
return res;
}