b6cbf7203b
This patch imports the unmodified current version of NetBSD libc. The NetBSD includes are in /nbsd_include, while the libc code itself is split between lib/nbsd_libc and common/lib/libc.
324 lines
7.1 KiB
C
324 lines
7.1 KiB
C
/* $NetBSD: getservent_r.c,v 1.10 2010/04/25 00:54:46 joerg Exp $ */
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/*
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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. 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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#include <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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#if 0
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static char sccsid[] = "@(#)getservent.c 8.1 (Berkeley) 6/4/93";
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#else
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__RCSID("$NetBSD: getservent_r.c,v 1.10 2010/04/25 00:54:46 joerg Exp $");
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#endif
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#endif /* LIBC_SCCS and not lint */
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#include "namespace.h"
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#include <cdbr.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <netdb.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "servent.h"
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#ifdef __weak_alias
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__weak_alias(endservent_r,_endservent_r)
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__weak_alias(getservent_r,_getservent_r)
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__weak_alias(setservent_r,_setservent_r)
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#endif
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int
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_servent_open(struct servent_data *sd)
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{
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if (sd->flags & (_SV_CDB | _SV_PLAINFILE)) {
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sd->flags |= _SV_FIRST;
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return 0;
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}
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free(sd->line);
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sd->line = NULL;
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free(sd->cdb_buf);
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sd->cdb_buf = NULL;
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sd->cdb_buf_len = 0;
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free(sd->aliases);
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sd->aliases = NULL;
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sd->maxaliases = 0;
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sd->flags |= _SV_FIRST;
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sd->cdb = cdbr_open(_PATH_SERVICES_CDB, CDBR_DEFAULT);
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if (sd->cdb != NULL) {
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sd->flags |= _SV_CDB;
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return 0;
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}
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sd->plainfile = fopen(_PATH_SERVICES, "r");
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if (sd->plainfile != NULL) {
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sd->flags |= _SV_PLAINFILE;
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return 0;
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}
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return -1;
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}
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void
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_servent_close(struct servent_data *sd)
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{
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if (sd->flags & _SV_CDB) {
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cdbr_close(sd->cdb);
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sd->cdb = NULL;
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sd->flags &= ~_SV_CDB;
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}
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if (sd->flags & _SV_PLAINFILE) {
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(void)fclose(sd->plainfile);
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sd->plainfile = NULL;
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sd->flags &= ~_SV_PLAINFILE;
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}
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sd->flags &= ~_SV_STAYOPEN;
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}
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int
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_servent_getline(struct servent_data *sd)
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{
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if (sd->flags & _SV_CDB)
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return -1;
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if ((sd->flags & _SV_PLAINFILE) == 0)
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return -1;
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free(sd->line);
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sd->line = NULL;
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if (sd->flags & _SV_FIRST) {
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(void)rewind((FILE *)sd->plainfile);
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sd->flags &= ~_SV_FIRST;
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}
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sd->line = fparseln(sd->plainfile, NULL, NULL, NULL,
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FPARSELN_UNESCALL);
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return sd->line == NULL ? -1 : 0;
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}
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struct servent *
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_servent_parseline(struct servent_data *sd, struct servent *sp)
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{
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size_t i = 0;
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int oerrno;
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char *p, *cp, **q;
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if (sd->line == NULL)
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return NULL;
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sp->s_name = p = sd->line;
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p = strpbrk(p, " \t");
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if (p == NULL)
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return NULL;
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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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return NULL;
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*cp++ = '\0';
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sp->s_port = htons((u_short)atoi(p));
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sp->s_proto = cp;
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if (sd->aliases == NULL) {
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sd->maxaliases = 10;
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sd->aliases = calloc(sd->maxaliases, sizeof(*sd->aliases));
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if (sd->aliases == NULL) {
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oerrno = errno;
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endservent_r(sd);
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errno = oerrno;
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return NULL;
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}
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}
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sp->s_aliases = sd->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 (i == sd->maxaliases - 2) {
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sd->maxaliases *= 2;
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q = realloc(sd->aliases, sd->maxaliases * sizeof(*q));
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if (q == NULL) {
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oerrno = errno;
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endservent_r(sd);
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errno = oerrno;
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return NULL;
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}
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sp->s_aliases = sd->aliases = q;
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}
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sp->s_aliases[i++] = 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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sp->s_aliases[i] = NULL;
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return sp;
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}
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void
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setservent_r(int f, struct servent_data *sd)
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{
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(void)_servent_open(sd);
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sd->flags |= f ? _SV_STAYOPEN : 0;
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}
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void
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endservent_r(struct servent_data *sd)
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{
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_servent_close(sd);
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free(sd->aliases);
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sd->aliases = NULL;
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sd->maxaliases = 0;
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free(sd->line);
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sd->line = NULL;
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free(sd->cdb_buf);
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sd->cdb_buf = NULL;
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sd->cdb_buf_len = 0;
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}
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struct servent *
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getservent_r(struct servent *sp, struct servent_data *sd)
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{
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if ((sd->flags & (_SV_CDB | _SV_PLAINFILE)) == 0 &&
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_servent_open(sd) == -1)
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return NULL;
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if (sd->flags & _SV_CDB) {
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const void *data;
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size_t len;
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if (sd->flags & _SV_FIRST) {
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sd->cdb_index = 0;
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sd->flags &= ~_SV_FIRST;
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}
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if (cdbr_get(sd->cdb, sd->cdb_index, &data, &len))
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return NULL;
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++sd->cdb_index;
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return _servent_parsedb(sd, sp, data, len);
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}
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if (sd->flags & _SV_PLAINFILE) {
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for (;;) {
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if (_servent_getline(sd) == -1)
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return NULL;
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if (_servent_parseline(sd, sp) == NULL)
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continue;
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return sp;
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}
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}
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return NULL;
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}
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struct servent *
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_servent_parsedb(struct servent_data *sd, struct servent *sp,
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const uint8_t *data, size_t len)
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{
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char **q;
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size_t i;
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int oerrno;
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if ((sd->flags & _SV_STAYOPEN) == 0) {
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if (len > sd->cdb_buf_len) {
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void *tmp = realloc(sd->cdb_buf, len);
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if (tmp == NULL)
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goto fail;
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sd->cdb_buf = tmp;
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sd->cdb_buf_len = len;
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}
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memcpy(sd->cdb_buf, data, len);
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data = sd->cdb_buf;
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}
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if (len < 2)
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goto fail;
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sp->s_port = htobe16(be16dec(data));
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data += 2;
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len -= 2;
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if (len == 0 || len < (size_t)data[0] + 2)
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goto fail;
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sp->s_proto = __UNCONST(data + 1);
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if (sp->s_proto[data[0]] != '\0')
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goto fail;
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len -= 2 + data[0];
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data += 2 + data[0];
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if (len == 0)
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goto fail;
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if (len < (size_t)data[0] + 2)
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goto fail;
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sp->s_name = __UNCONST(data + 1);
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len -= 2 + data[0];
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data += 2 + data[0];
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if (sd->aliases == NULL) {
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sd->maxaliases = 10;
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sd->aliases = malloc(sd->maxaliases * sizeof(char *));
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if (sd->aliases == NULL)
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goto fail;
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}
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sp->s_aliases = sd->aliases;
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i = 0;
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while (len) {
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if (len < (size_t)data[0] + 2)
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goto fail;
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if (i == sd->maxaliases - 2) {
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sd->maxaliases *= 2;
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q = realloc(sd->aliases, sd->maxaliases * sizeof(*q));
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if (q == NULL)
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goto fail;
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sp->s_aliases = sd->aliases = q;
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}
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sp->s_aliases[i++] = __UNCONST(data + 1);
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len -= 2 + data[0];
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data += 2 + data[0];
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}
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sp->s_aliases[i] = NULL;
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return sp;
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fail:
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oerrno = errno;
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endservent_r(sd);
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errno = oerrno;
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return NULL;
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}
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