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d201fe46e3
adding (weak definitions to) stubs for some of the pthread functions. If the threads library is linked in, the real pthread functions will pulled in. Use the following convention for system calls wrapped by the threads library: __sys_foo - actual system call _foo - weak definition to __sys_foo foo - weak definition to __sys_foo Change all libc uses of system calls wrapped by the threads library from foo to _foo. In order to define the prototypes for _foo(), we introduce namespace.h and un-namespace.h (suggested by bde). All files that need to reference these system calls, should include namespace.h before any standard includes, then include un-namespace.h after the standard includes and before any local includes. <db.h> is an exception and shouldn't be included in between namespace.h and un-namespace.h namespace.h will define foo to _foo, and un-namespace.h will undefine foo. Try to eliminate some of the recursive calls to MT-safe functions in libc/stdio in preparation for adding a mutex to FILE. We have recursive mutexes, but would like to avoid using them if possible. Remove uneeded includes of <errno.h> from a few files. Add $FreeBSD$ to a few files in order to pass commitprep. Approved by: -arch
152 lines
4.0 KiB
C
152 lines
4.0 KiB
C
/*-
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* Copyright (c) 1994, Garrett Wollman
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE 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[] = "@(#)$FreeBSD$";
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static char rcsid[] = "$FreeBSD$";
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#endif /* LIBC_SCCS and not lint */
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#include <sys/param.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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#include <stdio.h>
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#include <ctype.h>
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#include <string.h>
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#include <stdarg.h>
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#include <nsswitch.h>
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#include <arpa/nameser.h> /* XXX hack for _res */
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#include <resolv.h> /* XXX hack for _res */
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extern int _ht_gethostbyname(void *, void *, va_list);
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extern int _dns_gethostbyname(void *, void *, va_list);
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extern int _nis_gethostbyname(void *, void *, va_list);
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extern int _ht_gethostbyaddr(void *, void *, va_list);
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extern int _dns_gethostbyaddr(void *, void *, va_list);
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extern int _nis_gethostbyaddr(void *, void *, va_list);
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/* Host lookup order if nsswitch.conf is broken or nonexistant */
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static const ns_src default_src[] = {
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{ NSSRC_FILES, NS_SUCCESS },
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{ NSSRC_DNS, NS_SUCCESS },
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{ 0 }
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};
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struct hostent *
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gethostbyname(const char *name)
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{
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struct hostent *hp;
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if ((_res.options & RES_INIT) == 0 && res_init() == -1) {
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h_errno = NETDB_INTERNAL;
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return (NULL);
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}
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if (_res.options & RES_USE_INET6) { /* XXX */
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hp = gethostbyname2(name, AF_INET6); /* XXX */
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if (hp) /* XXX */
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return (hp); /* XXX */
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} /* XXX */
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return (gethostbyname2(name, AF_INET));
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}
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struct hostent *
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gethostbyname2(const char *name, int type)
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{
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struct hostent *hp = 0;
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int rval;
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static const ns_dtab dtab[] = {
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NS_FILES_CB(_ht_gethostbyname, NULL)
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{ NSSRC_DNS, _dns_gethostbyname, NULL },
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NS_NIS_CB(_nis_gethostbyname, NULL) /* force -DHESIOD */
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{ 0 }
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};
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rval = nsdispatch((void *)&hp, dtab, NSDB_HOSTS, "gethostbyname",
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default_src, name, type);
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if (rval != NS_SUCCESS)
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return NULL;
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else
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return hp;
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}
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struct hostent *
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gethostbyaddr(const char *addr, int len, int type)
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{
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struct hostent *hp = 0;
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int rval;
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static const ns_dtab dtab[] = {
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NS_FILES_CB(_ht_gethostbyaddr, NULL)
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{ NSSRC_DNS, _dns_gethostbyaddr, NULL },
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NS_NIS_CB(_nis_gethostbyaddr, NULL) /* force -DHESIOD */
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{ 0 }
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};
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rval = nsdispatch((void *)&hp, dtab, NSDB_HOSTS, "gethostbyaddr",
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default_src, addr, len, type);
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if (rval != NS_SUCCESS)
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return NULL;
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else
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return hp;
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}
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struct hostent_data;
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/*
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* Temporary function (not thread safe)
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*/
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int gethostbyaddr_r(const char *addr, int len, int type,
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struct hostent *result, struct hostent_data *buffer)
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{
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struct hostent *hp;
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int ret;
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if ((hp = gethostbyaddr(addr, len, type)) == NULL) {
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ret = -1;
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} else {
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memcpy(result, hp, sizeof(struct hostent));
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ret = 0;
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}
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return(ret);
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}
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void
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sethostent(stayopen)
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int stayopen;
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{
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_sethosthtent(stayopen);
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_sethostdnsent(stayopen);
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}
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void
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endhostent()
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{
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_endhosthtent();
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_endhostdnsent();
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}
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