/*
* Copyright (c) 1983, 1993
* The Regents of the University of California. 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 the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
*
* $Id$
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)getservent.c 8.1 (Berkeley) 6/4/93";
#endif /* LIBC_SCCS and not lint */
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#ifdef YP
#include <rpc/rpc.h>
#include <rpcsvc/yp_prot.h>
#include <rpcsvc/ypclnt.h>
static int serv_stepping_yp = 0;
extern int _yp_check __P(( char ** ));
#endif
#define MAXALIASES 35
static FILE *servf = NULL;
static char line[BUFSIZ+1];
static struct servent serv;
static char *serv_aliases[MAXALIASES];
int _serv_stayopen;
#ifdef YP
char *___getservbyname_yp = NULL;
char *___getservbyproto_yp = NULL;
int ___getservbyport_yp = 0;
static char *yp_domain = NULL;
static int
_getservbyport_yp(line)
char *line;
{
char *result;
int resultlen;
char buf[YPMAXRECORD + 2];
int rv;
snprintf(buf, sizeof(buf), "%d/%s", ntohs(___getservbyport_yp),
___getservbyproto_yp);
___getservbyport_yp = 0;
___getservbyproto_yp = NULL;
if(!yp_domain) {
if(yp_get_default_domain(&yp_domain))
return (0);
}
/*
* We have to be a little flexible here. Ideally you're supposed
* to have both a services.byname and a services.byport map, but
* some systems have only services.byname. FreeBSD cheats a little
* by putting the services.byport information in the same map as
* services.byname so that either case will work. We allow for both
* possibilities here: if there is no services.byport map, we try
* services.byname instead.
*/
if ((rv = yp_match(yp_domain, "services.byport", buf, strlen(buf),
&result, &resultlen))) {
if (rv == YPERR_MAP) {
if (yp_match(yp_domain, "services.byname", buf,
strlen(buf), &result, &resultlen))
return(0);
} else
return(0);
}
/* getservent() expects lines terminated with \n -- make it happy */
snprintf(line, BUFSIZ, "%.*s\n", resultlen, result);
free(result);
return(1);
}
static int
_getservbyname_yp(line)
char *line;
{
char *result;
int resultlen;
char buf[YPMAXRECORD + 2];
if(!yp_domain) {
if(yp_get_default_domain(&yp_domain))
return (0);
}
snprintf(buf, sizeof(buf), "%s/%s", ___getservbyname_yp,
___getservbyproto_yp);
___getservbyname_yp = 0;
___getservbyproto_yp = NULL;
if (yp_match(yp_domain, "services.byname", buf, strlen(buf),
&result, &resultlen)) {
return(0);
}
/* getservent() expects lines terminated with \n -- make it happy */
snprintf(line, BUFSIZ, "%.*s\n", resultlen, result);
free(result);
return(1);
}
static int
_getservent_yp(line)
char *line;
{
static char *key = NULL;
static int keylen;
char *lastkey, *result;
int resultlen;
int rv;
if(!yp_domain) {
if(yp_get_default_domain(&yp_domain))
return (0);
}
if (!serv_stepping_yp) {
if (key)
free(key);
if ((rv = yp_first(yp_domain, "services.byname", &key, &keylen,
&result, &resultlen))) {
serv_stepping_yp = 0;
return(0);
}
serv_stepping_yp = 1;
} else {
lastkey = key;
rv = yp_next(yp_domain, "services.byname", key, keylen, &key,
&keylen, &result, &resultlen);
free(lastkey);
if (rv) {
serv_stepping_yp = 0;
return (0);
}
}
/* getservent() expects lines terminated with \n -- make it happy */
snprintf(line, BUFSIZ, "%.*s\n", resultlen, result);
free(result);
return(1);
}
#endif
void
setservent(f)
int f;
{
if (servf == NULL)
servf = fopen(_PATH_SERVICES, "r" );
else
rewind(servf);
_serv_stayopen |= f;
}
void
endservent()
{
if (servf) {
fclose(servf);
servf = NULL;
}
_serv_stayopen = 0;
}
struct servent *
getservent()
{
char *p;
register char *cp, **q;
#ifdef YP
if (serv_stepping_yp && _getservent_yp(line)) {
p = (char *)&line;
goto unpack;
}
tryagain:
#endif
if (servf == NULL && (servf = fopen(_PATH_SERVICES, "r" )) == NULL)
return (NULL);
again:
if ((p = fgets(line, BUFSIZ, servf)) == NULL)
return (NULL);
#ifdef YP
if (*p == '+' && _yp_check(NULL)) {
if (___getservbyname_yp != NULL) {
if (!_getservbyname_yp(line))
goto tryagain;
}
else if (___getservbyport_yp != 0) {
if (!_getservbyport_yp(line))
goto tryagain;
}
else if (!_getservent_yp(line))
goto tryagain;
}
unpack:
#endif
if (*p == '#')
goto again;
cp = strpbrk(p, "#\n");
if (cp == NULL)
goto again;
*cp = '\0';
serv.s_name = p;
p = strpbrk(p, " \t");
if (p == NULL)
goto again;
*p++ = '\0';
while (*p == ' ' || *p == '\t')
p++;
cp = strpbrk(p, ",/");
if (cp == NULL)
goto again;
*cp++ = '\0';
serv.s_port = htons((u_short)atoi(p));
serv.s_proto = cp;
q = serv.s_aliases = serv_aliases;
cp = strpbrk(cp, " \t");
if (cp != NULL)
*cp++ = '\0';
while (cp && *cp) {
if (*cp == ' ' || *cp == '\t') {
cp++;
continue;
}
if (q < &serv_aliases[MAXALIASES - 1])
*q++ = cp;
cp = strpbrk(cp, " \t");
if (cp != NULL)
*cp++ = '\0';
}
*q = NULL;
return (&serv);
}
