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NetBSD/lib/libc/yp/yplib.c

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/* $NetBSD: yplib.c,v 1.16 1995/07/14 21:04:24 christos Exp $ */
/*
* Copyright (c) 1992, 1993 Theo de Raadt <deraadt@fsa.ca>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Theo de Raadt.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef LINT
static char rcsid[] = "$NetBSD: yplib.c,v 1.16 1995/07/14 21:04:24 christos Exp $";
#endif
#include <sys/param.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/file.h>
#include <sys/uio.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <rpc/rpc.h>
#include <rpc/xdr.h>
#include <rpcsvc/yp_prot.h>
#include <rpcsvc/ypclnt.h>
#define BINDINGDIR "/var/yp/binding"
#define YPBINDLOCK "/var/run/ypbind.lock"
#define YPMATCHCACHE
int (*ypresp_allfn) __P((u_long, char *, int, char *, int, void *));
void *ypresp_data;
struct dom_binding *_ypbindlist;
static char _yp_domain[MAXHOSTNAMELEN];
int _yplib_timeout = 10;
static bool_t ypmatch_add __P((const char *, const char *, int, char *, int));
static bool_t ypmatch_find __P((const char *, const char *, int, const char **,
int *));
static void _yp_unbind __P((struct dom_binding *));
#ifdef YPMATCHCACHE
int _yplib_cache = 5;
static struct ypmatch_ent {
struct ypmatch_ent *next;
char *map, *key;
char *val;
int keylen, vallen;
time_t expire_t;
} *ypmc;
static bool_t
ypmatch_add(map, key, keylen, val, vallen)
const char *map;
const char *key;
int keylen;
char *val;
int vallen;
{
struct ypmatch_ent *ep;
time_t t;
(void)time(&t);
for (ep = ypmc; ep; ep = ep->next)
if (ep->expire_t < t)
break;
if (ep == NULL) {
if ((ep = malloc(sizeof *ep)) == NULL)
return 0;
(void)memset(ep, 0, sizeof *ep);
if (ypmc)
ep->next = ypmc;
ypmc = ep;
}
if (ep->key) {
free(ep->key);
ep->key = NULL;
}
if (ep->val) {
free(ep->val);
ep->val = NULL;
}
if ((ep->key = malloc(keylen)) == NULL)
return 0;
if ((ep->val = malloc(vallen)) == NULL) {
free(ep->key);
ep->key = NULL;
return 0;
}
ep->keylen = keylen;
ep->vallen = vallen;
(void)memcpy(ep->key, key, ep->keylen);
(void)memcpy(ep->val, val, ep->vallen);
if (ep->map) {
if (strcmp(ep->map, map)) {
free(ep->map);
if ((ep->map = strdup(map)) == NULL)
return 0;
}
} else {
if ((ep->map = strdup(map)) == NULL)
return 0;
}
ep->expire_t = t + _yplib_cache;
return 1;
}
static bool_t
ypmatch_find(map, key, keylen, val, vallen)
const char *map;
const char *key;
int keylen;
const char **val;
int *vallen;
{
struct ypmatch_ent *ep;
time_t t;
if (ypmc == NULL)
return 0;
(void) time(&t);
for (ep = ypmc; ep; ep = ep->next) {
if (ep->keylen != keylen)
continue;
if (strcmp(ep->map, map))
continue;
if (memcmp(ep->key, key, keylen))
continue;
if (t > ep->expire_t)
continue;
*val = ep->val;
*vallen = ep->vallen;
return 1;
}
return 0;
}
#endif
int
_yp_dobind(dom, ypdb)
const char *dom;
struct dom_binding **ypdb;
{
static int pid = -1;
char path[MAXPATHLEN];
struct dom_binding *ysd, *ysd2;
struct ypbind_resp ypbr;
struct timeval tv;
struct sockaddr_in clnt_sin;
int clnt_sock, fd, gpid;
CLIENT *client;
int new = 0, r;
int count = 0;
/*
* test if YP is running or not
*/
if ((fd = open(YPBINDLOCK, O_RDONLY)) == -1)
return YPERR_YPBIND;
if (!(flock(fd, LOCK_EX | LOCK_NB) == -1 && errno == EWOULDBLOCK)) {
(void)close(fd);
return YPERR_YPBIND;
}
(void)close(fd);
gpid = getpid();
if (!(pid == -1 || pid == gpid)) {
ysd = _ypbindlist;
while (ysd) {
if (ysd->dom_client)
clnt_destroy(ysd->dom_client);
ysd2 = ysd->dom_pnext;
free(ysd);
ysd = ysd2;
}
_ypbindlist = NULL;
}
pid = gpid;
if (ypdb != NULL)
*ypdb = NULL;
if (dom == NULL || strlen(dom) == 0)
return YPERR_BADARGS;
for (ysd = _ypbindlist; ysd; ysd = ysd->dom_pnext)
if (strcmp(dom, ysd->dom_domain) == 0)
break;
if (ysd == NULL) {
if ((ysd = malloc(sizeof *ysd)) == NULL)
return YPERR_YPERR;
(void)memset(ysd, 0, sizeof *ysd);
ysd->dom_socket = -1;
ysd->dom_vers = 0;
new = 1;
}
again:
if (ysd->dom_vers == 0) {
(void) snprintf(path, sizeof(path), "%s/%s.%d",
BINDINGDIR, dom, 2);
if ((fd = open(path, O_RDONLY)) == -1) {
/*
* no binding file, YP is dead, or not yet fully
* alive.
*/
goto trynet;
}
if (flock(fd, LOCK_EX | LOCK_NB) == -1 &&
errno == EWOULDBLOCK) {
struct iovec iov[2];
struct ypbind_resp ybr;
u_short ypb_port;
struct ypbind_binding *bn;
iov[0].iov_base = (caddr_t) & ypb_port;
iov[0].iov_len = sizeof ypb_port;
iov[1].iov_base = (caddr_t) & ybr;
iov[1].iov_len = sizeof ybr;
r = readv(fd, iov, 2);
if (r != iov[0].iov_len + iov[1].iov_len) {
(void)close(fd);
ysd->dom_vers = -1;
goto again;
}
(void)memset(&ysd->dom_server_addr, 0,
sizeof ysd->dom_server_addr);
ysd->dom_server_addr.sin_len =
sizeof(struct sockaddr_in);
ysd->dom_server_addr.sin_family = AF_INET;
bn = &ybr.ypbind_respbody.ypbind_bindinfo;
ysd->dom_server_addr.sin_port =
bn->ypbind_binding_port;
ysd->dom_server_addr.sin_addr =
bn->ypbind_binding_addr;
ysd->dom_server_port = ysd->dom_server_addr.sin_port;
(void)close(fd);
goto gotit;
} else {
/* no lock on binding file, YP is dead. */
(void)close(fd);
if (new)
free(ysd);
return YPERR_YPBIND;
}
}
trynet:
if (ysd->dom_vers == -1 || ysd->dom_vers == 0) {
struct ypbind_binding *bn;
(void)memset(&clnt_sin, 0, sizeof clnt_sin);
clnt_sin.sin_len = sizeof(struct sockaddr_in);
clnt_sin.sin_family = AF_INET;
clnt_sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
clnt_sock = RPC_ANYSOCK;
client = clnttcp_create(&clnt_sin, YPBINDPROG, YPBINDVERS,
&clnt_sock, 0, 0);
if (client == NULL) {
clnt_pcreateerror("clnttcp_create");
if (new)
free(ysd);
return YPERR_YPBIND;
}
tv.tv_sec = _yplib_timeout;
tv.tv_usec = 0;
r = clnt_call(client, YPBINDPROC_DOMAIN, xdr_domainname,
dom, xdr_ypbind_resp, &ypbr, tv);
if (r != RPC_SUCCESS) {
if (new == 0 || count)
fprintf(stderr,
"YP server for domain %s not responding, still trying\n",
dom);
count++;
clnt_destroy(client);
ysd->dom_vers = -1;
goto again;
}
clnt_destroy(client);
(void)memset(&ysd->dom_server_addr, 0,
sizeof ysd->dom_server_addr);
ysd->dom_server_addr.sin_len = sizeof(struct sockaddr_in);
ysd->dom_server_addr.sin_family = AF_INET;
bn = &ypbr.ypbind_respbody.ypbind_bindinfo;
ysd->dom_server_addr.sin_port =
bn->ypbind_binding_port;
ysd->dom_server_addr.sin_addr.s_addr =
bn->ypbind_binding_addr.s_addr;
ysd->dom_server_port =
bn->ypbind_binding_port;
gotit:
ysd->dom_vers = YPVERS;
(void)strcpy(ysd->dom_domain, dom);
}
tv.tv_sec = _yplib_timeout / 2;
tv.tv_usec = 0;
if (ysd->dom_client)
clnt_destroy(ysd->dom_client);
ysd->dom_socket = RPC_ANYSOCK;
ysd->dom_client = clntudp_create(&ysd->dom_server_addr,
YPPROG, YPVERS, tv, &ysd->dom_socket);
if (ysd->dom_client == NULL) {
clnt_pcreateerror("clntudp_create");
ysd->dom_vers = -1;
goto again;
}
if (fcntl(ysd->dom_socket, F_SETFD, 1) == -1)
perror("fcntl: F_SETFD");
if (new) {
ysd->dom_pnext = _ypbindlist;
_ypbindlist = ysd;
}
if (ypdb != NULL)
*ypdb = ysd;
return 0;
}
static void
_yp_unbind(ypb)
struct dom_binding *ypb;
{
clnt_destroy(ypb->dom_client);
ypb->dom_client = NULL;
ypb->dom_socket = -1;
}
int
yp_bind(dom)
const char *dom;
{
return _yp_dobind(dom, NULL);
}
void
yp_unbind(dom)
const char *dom;
{
struct dom_binding *ypb, *ypbp;
ypbp = NULL;
for (ypb = _ypbindlist; ypb; ypb = ypb->dom_pnext) {
if (strcmp(dom, ypb->dom_domain) == 0) {
clnt_destroy(ypb->dom_client);
if (ypbp)
ypbp->dom_pnext = ypb->dom_pnext;
else
_ypbindlist = ypb->dom_pnext;
free(ypb);
return;
}
ypbp = ypb;
}
return;
}
int
yp_match(indomain, inmap, inkey, inkeylen, outval, outvallen)
const char *indomain;
const char *inmap;
const char *inkey;
int inkeylen;
char **outval;
int *outvallen;
{
struct dom_binding *ysd;
struct ypresp_val yprv;
struct timeval tv;
struct ypreq_key yprk;
int r;
*outval = NULL;
*outvallen = 0;
again:
if (_yp_dobind(indomain, &ysd) != 0)
return YPERR_DOMAIN;
#ifdef YPMATCHCACHE
if (!strcmp(_yp_domain, indomain) && ypmatch_find(inmap, inkey,
inkeylen, &yprv.valdat.dptr, &yprv.valdat.dsize)) {
*outvallen = yprv.valdat.dsize;
if ((*outval = malloc(*outvallen + 1)) == NULL)
return YPERR_YPERR;
(void)memcpy(*outval, yprv.valdat.dptr, *outvallen);
(*outval)[*outvallen] = '\0';
return 0;
}
#endif
tv.tv_sec = _yplib_timeout;
tv.tv_usec = 0;
yprk.domain = indomain;
yprk.map = inmap;
yprk.keydat.dptr = (char *) inkey;
yprk.keydat.dsize = inkeylen;
memset(&yprv, 0, sizeof yprv);
r = clnt_call(ysd->dom_client, YPPROC_MATCH,
xdr_ypreq_key, &yprk, xdr_ypresp_val, &yprv, tv);
if (r != RPC_SUCCESS) {
clnt_perror(ysd->dom_client, "yp_match: clnt_call");
ysd->dom_vers = -1;
goto again;
}
if (!(r = ypprot_err(yprv.status))) {
*outvallen = yprv.valdat.dsize;
if ((*outval = malloc(*outvallen + 1)) == NULL)
return YPERR_YPERR;
(void)memcpy(*outval, yprv.valdat.dptr, *outvallen);
(*outval)[*outvallen] = '\0';
#ifdef YPMATCHCACHE
if (strcmp(_yp_domain, indomain) == 0)
if (!ypmatch_add(inmap, inkey, inkeylen,
*outval, *outvallen))
r = RPC_SYSTEMERROR;
#endif
}
xdr_free(xdr_ypresp_val, (char *) &yprv);
_yp_unbind(ysd);
return r;
}
int
yp_get_default_domain(domp)
char **domp;
{
*domp = NULL;
if (_yp_domain[0] == '\0')
if (getdomainname(_yp_domain, sizeof _yp_domain))
return YPERR_NODOM;
*domp = _yp_domain;
return 0;
}
int
yp_first(indomain, inmap, outkey, outkeylen, outval, outvallen)
const char *indomain;
const char *inmap;
char **outkey;
int *outkeylen;
char **outval;
int *outvallen;
{
struct ypresp_key_val yprkv;
struct ypreq_nokey yprnk;
struct dom_binding *ysd;
struct timeval tv;
int r;
*outkey = *outval = NULL;
*outkeylen = *outvallen = 0;
again:
if (_yp_dobind(indomain, &ysd) != 0)
return YPERR_DOMAIN;
tv.tv_sec = _yplib_timeout;
tv.tv_usec = 0;
yprnk.domain = indomain;
yprnk.map = inmap;
(void)memset(&yprkv, 0, sizeof yprkv);
r = clnt_call(ysd->dom_client, YPPROC_FIRST,
xdr_ypreq_nokey, &yprnk, xdr_ypresp_key_val, &yprkv, tv);
if (r != RPC_SUCCESS) {
clnt_perror(ysd->dom_client, "yp_first: clnt_call");
ysd->dom_vers = -1;
goto again;
}
if (!(r = ypprot_err(yprkv.status))) {
*outkeylen = yprkv.keydat.dsize;
if ((*outkey = malloc(*outkeylen + 1)) == NULL)
r = RPC_SYSTEMERROR;
else {
(void)memcpy(*outkey, yprkv.keydat.dptr, *outkeylen);
(*outkey)[*outkeylen] = '\0';
}
*outvallen = yprkv.valdat.dsize;
if ((*outval = malloc(*outvallen + 1)) == NULL)
r = RPC_SYSTEMERROR;
else {
(void)memcpy(*outval, yprkv.valdat.dptr, *outvallen);
(*outval)[*outvallen] = '\0';
}
}
xdr_free(xdr_ypresp_key_val, (char *) &yprkv);
_yp_unbind(ysd);
return r;
}
int
yp_next(indomain, inmap, inkey, inkeylen, outkey, outkeylen, outval, outvallen)
const char *indomain;
const char *inmap;
const char *inkey;
int inkeylen;
char **outkey;
int *outkeylen;
char **outval;
int *outvallen;
{
struct ypresp_key_val yprkv;
struct ypreq_key yprk;
struct dom_binding *ysd;
struct timeval tv;
int r;
*outkey = *outval = NULL;
*outkeylen = *outvallen = 0;
again:
if (_yp_dobind(indomain, &ysd) != 0)
return YPERR_DOMAIN;
tv.tv_sec = _yplib_timeout;
tv.tv_usec = 0;
yprk.domain = indomain;
yprk.map = inmap;
yprk.keydat.dptr = inkey;
yprk.keydat.dsize = inkeylen;
(void)memset(&yprkv, 0, sizeof yprkv);
r = clnt_call(ysd->dom_client, YPPROC_NEXT,
xdr_ypreq_key, &yprk, xdr_ypresp_key_val, &yprkv, tv);
if (r != RPC_SUCCESS) {
clnt_perror(ysd->dom_client, "yp_next: clnt_call");
ysd->dom_vers = -1;
goto again;
}
if (!(r = ypprot_err(yprkv.status))) {
*outkeylen = yprkv.keydat.dsize;
if ((*outkey = malloc(*outkeylen + 1)) == NULL)
r = RPC_SYSTEMERROR;
else {
(void)memcpy(*outkey, yprkv.keydat.dptr, *outkeylen);
(*outkey)[*outkeylen] = '\0';
}
*outvallen = yprkv.valdat.dsize;
if ((*outval = malloc(*outvallen + 1)) == NULL)
r = RPC_SYSTEMERROR;
else {
(void)memcpy(*outval, yprkv.valdat.dptr, *outvallen);
(*outval)[*outvallen] = '\0';
}
}
xdr_free(xdr_ypresp_key_val, (char *) &yprkv);
_yp_unbind(ysd);
return r;
}
int
yp_all(indomain, inmap, incallback)
const char *indomain;
const char *inmap;
struct ypall_callback *incallback;
{
struct ypreq_nokey yprnk;
struct dom_binding *ysd;
struct timeval tv;
struct sockaddr_in clnt_sin;
CLIENT *clnt;
u_long status;
int clnt_sock;
if (_yp_dobind(indomain, &ysd) != 0)
return YPERR_DOMAIN;
tv.tv_sec = _yplib_timeout;
tv.tv_usec = 0;
clnt_sock = RPC_ANYSOCK;
clnt_sin = ysd->dom_server_addr;
clnt_sin.sin_port = 0;
clnt = clnttcp_create(&clnt_sin, YPPROG, YPVERS, &clnt_sock, 0, 0);
if (clnt == NULL) {
printf("clnttcp_create failed\n");
return YPERR_PMAP;
}
yprnk.domain = indomain;
yprnk.map = inmap;
ypresp_allfn = incallback->foreach;
ypresp_data = (void *) incallback->data;
(void) clnt_call(clnt, YPPROC_ALL,
xdr_ypreq_nokey, &yprnk, xdr_ypresp_all_seq, &status, tv);
clnt_destroy(clnt);
/* not really needed... */
xdr_free(xdr_ypresp_all_seq, (char *) &status);
_yp_unbind(ysd);
if (status != YP_FALSE)
return ypprot_err(status);
return 0;
}
int
yp_order(indomain, inmap, outorder)
const char *indomain;
const char *inmap;
int *outorder;
{
struct dom_binding *ysd;
struct ypresp_order ypro;
struct ypreq_nokey yprnk;
struct timeval tv;
int r;
again:
if (_yp_dobind(indomain, &ysd) != 0)
return YPERR_DOMAIN;
tv.tv_sec = _yplib_timeout;
tv.tv_usec = 0;
yprnk.domain = indomain;
yprnk.map = inmap;
(void)memset(&ypro, 0, sizeof ypro);
r = clnt_call(ysd->dom_client, YPPROC_ORDER,
xdr_ypreq_nokey, &yprnk, xdr_ypresp_order, &ypro, tv);
if (r != RPC_SUCCESS) {
clnt_perror(ysd->dom_client, "yp_order: clnt_call");
ysd->dom_vers = -1;
goto again;
}
*outorder = ypro.ordernum;
xdr_free(xdr_ypresp_order, (char *) &ypro);
_yp_unbind(ysd);
return ypprot_err(ypro.status);
}
int
yp_master(indomain, inmap, outname)
const char *indomain;
const char *inmap;
char **outname;
{
struct dom_binding *ysd;
struct ypresp_master yprm;
struct ypreq_nokey yprnk;
struct timeval tv;
int r;
again:
if (_yp_dobind(indomain, &ysd) != 0)
return YPERR_DOMAIN;
tv.tv_sec = _yplib_timeout;
tv.tv_usec = 0;
yprnk.domain = indomain;
yprnk.map = inmap;
(void)memset(&yprm, 0, sizeof yprm);
r = clnt_call(ysd->dom_client, YPPROC_MASTER,
xdr_ypreq_nokey, &yprnk, xdr_ypresp_master, &yprm, tv);
if (r != RPC_SUCCESS) {
clnt_perror(ysd->dom_client, "yp_master: clnt_call");
ysd->dom_vers = -1;
goto again;
}
if (!(r = ypprot_err(yprm.status))) {
if ((*outname = strdup(yprm.master)) == NULL)
r = RPC_SYSTEMERROR;
}
xdr_free(xdr_ypresp_master, (char *) &yprm);
_yp_unbind(ysd);
return r;
}
int
yp_maplist(indomain, outmaplist)
const char *indomain;
struct ypmaplist **outmaplist;
{
struct dom_binding *ysd;
struct ypresp_maplist ypml;
struct timeval tv;
int r;
again:
if (_yp_dobind(indomain, &ysd) != 0)
return YPERR_DOMAIN;
tv.tv_sec = _yplib_timeout;
tv.tv_usec = 0;
memset(&ypml, 0, sizeof ypml);
r = clnt_call(ysd->dom_client, YPPROC_MAPLIST,
xdr_domainname, indomain, xdr_ypresp_maplist, &ypml, tv);
if (r != RPC_SUCCESS) {
clnt_perror(ysd->dom_client, "yp_maplist: clnt_call");
ysd->dom_vers = -1;
goto again;
}
*outmaplist = ypml.list;
/* NO: xdr_free(xdr_ypresp_maplist, &ypml); */
_yp_unbind(ysd);
return ypprot_err(ypml.status);
}
char *
yperr_string(incode)
int incode;
{
static char err[80];
switch (incode) {
case 0:
return "Success";
case YPERR_BADARGS:
return "Request arguments bad";
case YPERR_RPC:
return "RPC failure";
case YPERR_DOMAIN:
return "Can't bind to server which serves this domain";
case YPERR_MAP:
return "No such map in server's domain";
case YPERR_KEY:
return "No such key in map";
case YPERR_YPERR:
return "YP server error";
case YPERR_RESRC:
return "Local resource allocation failure";
case YPERR_NOMORE:
return "No more records in map database";
case YPERR_PMAP:
return "Can't communicate with portmapper";
case YPERR_YPBIND:
return "Can't communicate with ypbind";
case YPERR_YPSERV:
return "Can't communicate with ypserv";
case YPERR_NODOM:
return "Local domain name not set";
case YPERR_BADDB:
return "Server data base is bad";
case YPERR_VERS:
return "YP server version mismatch - server can't supply service.";
case YPERR_ACCESS:
return "Access violation";
case YPERR_BUSY:
return "Database is busy";
}
(void) snprintf(err, sizeof(err), "YP unknown error %d\n", incode);
return err;
}
int
ypprot_err(incode)
unsigned int incode;
{
switch (incode) {
case YP_TRUE:
return 0;
case YP_FALSE:
return YPERR_YPBIND;
case YP_NOMORE:
return YPERR_NOMORE;
case YP_NOMAP:
return YPERR_MAP;
case YP_NODOM:
return YPERR_NODOM;
case YP_NOKEY:
return YPERR_KEY;
case YP_BADOP:
return YPERR_YPERR;
case YP_BADDB:
return YPERR_BADDB;
case YP_YPERR:
return YPERR_YPERR;
case YP_BADARGS:
return YPERR_BADARGS;
case YP_VERS:
return YPERR_VERS;
}
return YPERR_YPERR;
}
int
_yp_check(dom)
char **dom;
{
char *unused;
if (_yp_domain[0] == '\0')
if (yp_get_default_domain(&unused))
return 0;
if (dom)
*dom = _yp_domain;
if (yp_bind(_yp_domain) == 0)
return 1;
return 0;
}
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