d8f77b4529
through <pthread.h>. gen/sem.c: Prerequisite for <_semaphore.h> net/getprotoent.c: USHRT_MAX net/getservent.c: USHRT_MAX stdio/ungetwc.c: MB_LEN_MAX stdio/vfwscanf.c: MB_LEN_MAX
357 lines
8.1 KiB
C
357 lines
8.1 KiB
C
/*
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* Copyright (c) 1983, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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static char sccsid[] = "@(#)getservent.c 8.1 (Berkeley) 6/4/93";
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#endif /* LIBC_SCCS and not lint */
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <arpa/inet.h>
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#include <limits.h>
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#include <netdb.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#ifdef YP
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#include <rpc/rpc.h>
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#include <rpcsvc/yp_prot.h>
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#include <rpcsvc/ypclnt.h>
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#endif
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#include "namespace.h"
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#include "reentrant.h"
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#include "un-namespace.h"
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#include "netdb_private.h"
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static struct servdata servdata;
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static thread_key_t servdata_key;
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static once_t servdata_init_once = ONCE_INITIALIZER;
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static int servdata_thr_keycreated = 0;
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static void
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servent_data_clear(struct servent_data *sed)
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{
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if (sed->fp) {
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fclose(sed->fp);
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sed->fp = NULL;
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}
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#ifdef YP
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free(sed->yp_key);
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sed->yp_key = NULL;
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#endif
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}
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static void
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servdata_free(void *ptr)
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{
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struct servdata *sd = ptr;
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if (sd == NULL)
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return;
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servent_data_clear(&sd->data);
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free(sd);
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}
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static void
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servdata_keycreate(void)
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{
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servdata_thr_keycreated =
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(thr_keycreate(&servdata_key, servdata_free) == 0);
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}
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struct servdata *
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__servdata_init(void)
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{
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struct servdata *sd;
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if (thr_main() != 0)
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return (&servdata);
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if (thr_once(&servdata_init_once, servdata_keycreate) != 0 ||
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!servdata_thr_keycreated)
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return (NULL);
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if ((sd = thr_getspecific(servdata_key)) != NULL)
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return (sd);
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if ((sd = calloc(1, sizeof(*sd))) == NULL)
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return (NULL);
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if (thr_setspecific(servdata_key, sd) == 0)
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return (sd);
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free(sd);
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return (NULL);
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}
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#ifdef YP
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static int
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_getservbyport_yp(struct servent_data *sed)
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{
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char *result;
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int resultlen;
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char buf[YPMAXRECORD + 2];
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int rv;
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snprintf(buf, sizeof(buf), "%d/%s", ntohs(sed->yp_port),
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sed->yp_proto);
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sed->yp_port = 0;
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sed->yp_proto = NULL;
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if (!sed->yp_domain) {
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if (yp_get_default_domain(&sed->yp_domain))
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return (0);
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}
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/*
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* We have to be a little flexible here. Ideally you're supposed
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* to have both a services.byname and a services.byport map, but
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* some systems have only services.byname. FreeBSD cheats a little
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* by putting the services.byport information in the same map as
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* services.byname so that either case will work. We allow for both
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* possibilities here: if there is no services.byport map, we try
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* services.byname instead.
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*/
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if ((rv = yp_match(sed->yp_domain, "services.byport", buf, strlen(buf),
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&result, &resultlen))) {
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if (rv == YPERR_MAP) {
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if (yp_match(sed->yp_domain, "services.byname", buf,
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strlen(buf), &result, &resultlen))
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return(0);
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} else
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return(0);
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}
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/* getservent() expects lines terminated with \n -- make it happy */
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snprintf(sed->line, sizeof sed->line, "%.*s\n", resultlen, result);
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free(result);
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return(1);
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}
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static int
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_getservbyname_yp(struct servent_data *sed)
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{
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char *result;
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int resultlen;
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char buf[YPMAXRECORD + 2];
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if(!sed->yp_domain) {
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if(yp_get_default_domain(&sed->yp_domain))
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return (0);
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}
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snprintf(buf, sizeof(buf), "%s/%s", sed->yp_name, sed->yp_proto);
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sed->yp_name = 0;
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sed->yp_proto = NULL;
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if (yp_match(sed->yp_domain, "services.byname", buf, strlen(buf),
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&result, &resultlen)) {
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return(0);
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}
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/* getservent() expects lines terminated with \n -- make it happy */
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snprintf(sed->line, sizeof sed->line, "%.*s\n", resultlen, result);
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free(result);
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return(1);
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}
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static int
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_getservent_yp(struct servent_data *sed)
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{
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char *lastkey, *result;
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int resultlen;
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int rv;
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if (!sed->yp_domain) {
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if (yp_get_default_domain(&sed->yp_domain))
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return (0);
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}
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if (!sed->yp_stepping) {
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free(sed->yp_key);
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rv = yp_first(sed->yp_domain, "services.byname", &sed->yp_key,
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&sed->yp_keylen, &result, &resultlen);
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if (rv) {
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sed->yp_stepping = 0;
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return(0);
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}
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sed->yp_stepping = 1;
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} else {
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lastkey = sed->yp_key;
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rv = yp_next(sed->yp_domain, "services.byname", sed->yp_key,
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sed->yp_keylen, &sed->yp_key, &sed->yp_keylen, &result,
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&resultlen);
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free(lastkey);
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if (rv) {
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sed->yp_stepping = 0;
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return (0);
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}
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}
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/* getservent() expects lines terminated with \n -- make it happy */
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snprintf(sed->line, sizeof sed->line, "%.*s\n", resultlen, result);
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free(result);
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return(1);
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}
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#endif
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void
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setservent_r(int f, struct servent_data *sed)
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{
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if (sed->fp == NULL)
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sed->fp = fopen(_PATH_SERVICES, "r");
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else
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rewind(sed->fp);
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sed->stayopen |= f;
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}
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void
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endservent_r(struct servent_data *sed)
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{
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servent_data_clear(sed);
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sed->stayopen = 0;
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#ifdef YP
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sed->yp_stepping = 0;
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sed->yp_domain = NULL;
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#endif
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}
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int
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getservent_r(struct servent *se, struct servent_data *sed)
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{
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char *p;
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char *cp, **q, *endp;
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long l;
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#ifdef YP
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if (sed->yp_stepping && _getservent_yp(sed)) {
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p = sed->line;
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goto unpack;
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}
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tryagain:
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#endif
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if (sed->fp == NULL && (sed->fp = fopen(_PATH_SERVICES, "r")) == NULL)
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return (-1);
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again:
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if ((p = fgets(sed->line, sizeof sed->line, sed->fp)) == NULL)
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return (-1);
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#ifdef YP
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if (*p == '+' && _yp_check(NULL)) {
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if (sed->yp_name != NULL) {
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if (!_getservbyname_yp(sed))
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goto tryagain;
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}
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else if (sed->yp_port != 0) {
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if (!_getservbyport_yp(sed))
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goto tryagain;
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}
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else if (!_getservent_yp(sed))
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goto tryagain;
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}
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unpack:
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#endif
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if (*p == '#')
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goto again;
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cp = strpbrk(p, "#\n");
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if (cp != NULL)
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*cp = '\0';
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se->s_name = p;
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p = strpbrk(p, " \t");
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if (p == NULL)
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goto again;
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*p++ = '\0';
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while (*p == ' ' || *p == '\t')
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p++;
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cp = strpbrk(p, ",/");
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if (cp == NULL)
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goto again;
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*cp++ = '\0';
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l = strtol(p, &endp, 10);
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if (endp == p || *endp != '\0' || l < 0 || l > USHRT_MAX)
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goto again;
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se->s_port = htons((in_port_t)l);
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se->s_proto = cp;
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q = se->s_aliases = sed->aliases;
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cp = strpbrk(cp, " \t");
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if (cp != NULL)
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*cp++ = '\0';
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while (cp && *cp) {
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if (*cp == ' ' || *cp == '\t') {
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cp++;
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continue;
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}
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if (q < &sed->aliases[_MAXALIASES - 1])
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*q++ = cp;
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cp = strpbrk(cp, " \t");
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if (cp != NULL)
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*cp++ = '\0';
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}
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*q = NULL;
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return (0);
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}
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void
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setservent(int f)
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{
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struct servdata *sd;
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if ((sd = __servdata_init()) == NULL)
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return;
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setservent_r(f, &sd->data);
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}
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void
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endservent(void)
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{
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struct servdata *sd;
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if ((sd = __servdata_init()) == NULL)
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return;
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endservent_r(&sd->data);
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}
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struct servent *
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getservent(void)
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{
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struct servdata *sd;
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if ((sd = __servdata_init()) == NULL)
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return (NULL);
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if (getservent_r(&sd->serv, &sd->data) != 0)
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return (NULL);
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return (&sd->serv);
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}
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