279 lines
6.6 KiB
C
279 lines
6.6 KiB
C
/*
|
|
* 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.
|
|
*/
|
|
|
|
#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;
|
|
#endif
|
|
|
|
extern int _yp_check __P(( char ** ));
|
|
|
|
#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];
|
|
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];
|
|
|
|
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);
|
|
}
|