Mention more bugs which are fixed.
[glibc.git] / resolv / res_init.c
blob40dbe7d7e5c9e0c3b605bc2806acdd09ecef0b0f
1 /*
2 * Copyright (c) 1985, 1989, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
31 * Portions Copyright (c) 1993 by Digital Equipment Corporation.
33 * Permission to use, copy, modify, and distribute this software for any
34 * purpose with or without fee is hereby granted, provided that the above
35 * copyright notice and this permission notice appear in all copies, and that
36 * the name of Digital Equipment Corporation not be used in advertising or
37 * publicity pertaining to distribution of the document or software without
38 * specific, written prior permission.
40 * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
41 * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
42 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
43 * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
44 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
45 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
46 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
47 * SOFTWARE.
51 * Portions Copyright (c) 1996-1999 by Internet Software Consortium.
53 * Permission to use, copy, modify, and distribute this software for any
54 * purpose with or without fee is hereby granted, provided that the above
55 * copyright notice and this permission notice appear in all copies.
57 * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
58 * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
59 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
60 * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
61 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
62 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
63 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
64 * SOFTWARE.
67 #if defined(LIBC_SCCS) && !defined(lint)
68 static const char sccsid[] = "@(#)res_init.c 8.1 (Berkeley) 6/7/93";
69 static const char rcsid[] = "$BINDId: res_init.c,v 8.16 2000/05/09 07:10:12 vixie Exp $";
70 #endif /* LIBC_SCCS and not lint */
72 #include <ctype.h>
73 #include <netdb.h>
74 #include <resolv.h>
75 #include <stdio.h>
76 #include <stdio_ext.h>
77 #include <stdlib.h>
78 #include <string.h>
79 #include <unistd.h>
80 #include <arpa/inet.h>
81 #include <arpa/nameser.h>
82 #include <net/if.h>
83 #include <netinet/in.h>
84 #include <sys/param.h>
85 #include <sys/socket.h>
86 #include <sys/time.h>
87 #include <sys/types.h>
89 #include <not-cancel.h>
91 /* Options. Should all be left alone. */
92 #define RESOLVSORT
93 #define RFC1535
94 /* #undef DEBUG */
96 static void res_setoptions (res_state, const char *, const char *)
97 internal_function;
99 #ifdef RESOLVSORT
100 static const char sort_mask_chars[] = "/&";
101 #define ISSORTMASK(ch) (strchr(sort_mask_chars, ch) != NULL)
102 static u_int32_t net_mask (struct in_addr) __THROW;
103 #endif
105 #if !defined(isascii) /* XXX - could be a function */
106 # define isascii(c) (!(c & 0200))
107 #endif
109 #ifdef _LIBC
110 unsigned long long int __res_initstamp attribute_hidden;
111 #endif
114 * Resolver state default settings.
118 * Set up default settings. If the configuration file exist, the values
119 * there will have precedence. Otherwise, the server address is set to
120 * INADDR_ANY and the default domain name comes from the gethostname().
122 * An interrim version of this code (BIND 4.9, pre-4.4BSD) used 127.0.0.1
123 * rather than INADDR_ANY ("0.0.0.0") as the default name server address
124 * since it was noted that INADDR_ANY actually meant ``the first interface
125 * you "ifconfig"'d at boot time'' and if this was a SLIP or PPP interface,
126 * it had to be "up" in order for you to reach your own name server. It
127 * was later decided that since the recommended practice is to always
128 * install local static routes through 127.0.0.1 for all your network
129 * interfaces, that we could solve this problem without a code change.
131 * The configuration file should always be used, since it is the only way
132 * to specify a default domain. If you are running a server on your local
133 * machine, you should say "nameserver 0.0.0.0" or "nameserver 127.0.0.1"
134 * in the configuration file.
136 * Return 0 if completes successfully, -1 on error
139 res_ninit(res_state statp) {
140 extern int __res_vinit(res_state, int);
142 return (__res_vinit(statp, 0));
144 #ifdef _LIBC
145 libc_hidden_def (__res_ninit)
146 #endif
148 /* This function has to be reachable by res_data.c but not publically. */
150 __res_vinit(res_state statp, int preinit) {
151 register FILE *fp;
152 register char *cp, **pp;
153 register int n;
154 char buf[BUFSIZ];
155 int nserv = 0; /* number of nameserver records read from file */
156 #ifdef _LIBC
157 int nservall = 0; /* number of NS records read, nserv IPv4 only */
158 #endif
159 int haveenv = 0;
160 int havesearch = 0;
161 #ifdef RESOLVSORT
162 int nsort = 0;
163 char *net;
164 #endif
165 #ifndef RFC1535
166 int dots;
167 #endif
168 #ifdef _LIBC
169 statp->_u._ext.initstamp = __res_initstamp;
170 #endif
172 if (!preinit) {
173 statp->retrans = RES_TIMEOUT;
174 statp->retry = RES_DFLRETRY;
175 statp->options = RES_DEFAULT;
176 statp->id = res_randomid();
179 #ifdef USELOOPBACK
180 statp->nsaddr.sin_addr = inet_makeaddr(IN_LOOPBACKNET, 1);
181 #else
182 statp->nsaddr.sin_addr.s_addr = INADDR_ANY;
183 #endif
184 statp->nsaddr.sin_family = AF_INET;
185 statp->nsaddr.sin_port = htons(NAMESERVER_PORT);
186 statp->nscount = 0;
187 statp->ndots = 1;
188 statp->pfcode = 0;
189 statp->_vcsock = -1;
190 statp->_flags = 0;
191 statp->qhook = NULL;
192 statp->rhook = NULL;
193 statp->_u._ext.nsinit = 0;
194 statp->_u._ext.nscount = 0;
195 #ifdef _LIBC
196 statp->_u._ext.nscount6 = 0;
197 for (n = 0; n < MAXNS; n++) {
198 statp->_u._ext.nsaddrs[n] = NULL;
199 statp->_u._ext.nsmap[n] = MAXNS;
201 #endif
203 /* Allow user to override the local domain definition */
204 if ((cp = getenv("LOCALDOMAIN")) != NULL) {
205 (void)strncpy(statp->defdname, cp, sizeof(statp->defdname) - 1);
206 statp->defdname[sizeof(statp->defdname) - 1] = '\0';
207 haveenv++;
210 * Set search list to be blank-separated strings
211 * from rest of env value. Permits users of LOCALDOMAIN
212 * to still have a search list, and anyone to set the
213 * one that they want to use as an individual (even more
214 * important now that the rfc1535 stuff restricts searches)
216 cp = statp->defdname;
217 pp = statp->dnsrch;
218 *pp++ = cp;
219 for (n = 0; *cp && pp < statp->dnsrch + MAXDNSRCH; cp++) {
220 if (*cp == '\n') /* silly backwards compat */
221 break;
222 else if (*cp == ' ' || *cp == '\t') {
223 *cp = 0;
224 n = 1;
225 } else if (n) {
226 *pp++ = cp;
227 n = 0;
228 havesearch = 1;
231 /* null terminate last domain if there are excess */
232 while (*cp != '\0' && *cp != ' ' && *cp != '\t' && *cp != '\n')
233 cp++;
234 *cp = '\0';
235 *pp++ = 0;
238 #define MATCH(line, name) \
239 (!strncmp(line, name, sizeof(name) - 1) && \
240 (line[sizeof(name) - 1] == ' ' || \
241 line[sizeof(name) - 1] == '\t'))
243 if ((fp = fopen(_PATH_RESCONF, "rc")) != NULL) {
244 /* No threads use this stream. */
245 __fsetlocking (fp, FSETLOCKING_BYCALLER);
246 /* read the config file */
247 while (fgets_unlocked(buf, sizeof(buf), fp) != NULL) {
248 /* skip comments */
249 if (*buf == ';' || *buf == '#')
250 continue;
251 /* read default domain name */
252 if (MATCH(buf, "domain")) {
253 if (haveenv) /* skip if have from environ */
254 continue;
255 cp = buf + sizeof("domain") - 1;
256 while (*cp == ' ' || *cp == '\t')
257 cp++;
258 if ((*cp == '\0') || (*cp == '\n'))
259 continue;
260 strncpy(statp->defdname, cp, sizeof(statp->defdname) - 1);
261 statp->defdname[sizeof(statp->defdname) - 1] = '\0';
262 if ((cp = strpbrk(statp->defdname, " \t\n")) != NULL)
263 *cp = '\0';
264 havesearch = 0;
265 continue;
267 /* set search list */
268 if (MATCH(buf, "search")) {
269 if (haveenv) /* skip if have from environ */
270 continue;
271 cp = buf + sizeof("search") - 1;
272 while (*cp == ' ' || *cp == '\t')
273 cp++;
274 if ((*cp == '\0') || (*cp == '\n'))
275 continue;
276 strncpy(statp->defdname, cp, sizeof(statp->defdname) - 1);
277 statp->defdname[sizeof(statp->defdname) - 1] = '\0';
278 if ((cp = strchr(statp->defdname, '\n')) != NULL)
279 *cp = '\0';
281 * Set search list to be blank-separated strings
282 * on rest of line.
284 cp = statp->defdname;
285 pp = statp->dnsrch;
286 *pp++ = cp;
287 for (n = 0; *cp && pp < statp->dnsrch + MAXDNSRCH; cp++) {
288 if (*cp == ' ' || *cp == '\t') {
289 *cp = 0;
290 n = 1;
291 } else if (n) {
292 *pp++ = cp;
293 n = 0;
296 /* null terminate last domain if there are excess */
297 while (*cp != '\0' && *cp != ' ' && *cp != '\t')
298 cp++;
299 *cp = '\0';
300 *pp++ = 0;
301 havesearch = 1;
302 continue;
304 /* read nameservers to query */
305 #ifdef _LIBC
306 if (MATCH(buf, "nameserver") && nservall < MAXNS) {
307 #else
308 if (MATCH(buf, "nameserver") && nserv < MAXNS) {
309 #endif
310 struct in_addr a;
312 cp = buf + sizeof("nameserver") - 1;
313 while (*cp == ' ' || *cp == '\t')
314 cp++;
315 if ((*cp != '\0') && (*cp != '\n')
316 && __inet_aton(cp, &a)) {
317 statp->nsaddr_list[nservall].sin_addr = a;
318 statp->nsaddr_list[nservall].sin_family = AF_INET;
319 statp->nsaddr_list[nservall].sin_port =
320 htons(NAMESERVER_PORT);
321 nserv++;
322 #ifdef _LIBC
323 nservall++;
324 } else {
325 struct in6_addr a6;
326 char *el;
328 if ((el = strchr(cp, '\n')) != NULL)
329 *el = '\0';
330 if ((el = strchr(cp, SCOPE_DELIMITER)) != NULL)
331 *el = '\0';
332 if ((*cp != '\0') &&
333 (inet_pton(AF_INET6, cp, &a6) > 0)) {
334 struct sockaddr_in6 *sa6;
336 sa6 = malloc(sizeof(*sa6));
337 if (sa6 != NULL) {
338 sa6->sin6_family = AF_INET6;
339 sa6->sin6_port = htons(NAMESERVER_PORT);
340 sa6->sin6_flowinfo = 0;
341 sa6->sin6_addr = a6;
343 if (__builtin_expect (el == NULL, 1))
344 sa6->sin6_scope_id = 0;
345 else {
346 int try_numericscope = 1;
347 if (IN6_IS_ADDR_LINKLOCAL (&a6)
348 || IN6_IS_ADDR_MC_LINKLOCAL (&a6)) {
349 sa6->sin6_scope_id
350 = if_nametoindex (el + 1);
351 if (sa6->sin6_scope_id != 0)
352 try_numericscope = 0;
355 if (try_numericscope) {
356 char *end;
357 sa6->sin6_scope_id
358 = (uint32_t) strtoul (el + 1, &end,
359 10);
360 if (*end != '\0')
361 sa6->sin6_scope_id = 0;
365 statp->_u._ext.nsaddrs[nservall] = sa6;
366 statp->_u._ext.nssocks[nservall] = -1;
367 statp->_u._ext.nsmap[nservall] = MAXNS + 1;
368 nservall++;
371 #endif
373 continue;
375 #ifdef RESOLVSORT
376 if (MATCH(buf, "sortlist")) {
377 struct in_addr a;
379 cp = buf + sizeof("sortlist") - 1;
380 while (nsort < MAXRESOLVSORT) {
381 while (*cp == ' ' || *cp == '\t')
382 cp++;
383 if (*cp == '\0' || *cp == '\n' || *cp == ';')
384 break;
385 net = cp;
386 while (*cp && !ISSORTMASK(*cp) && *cp != ';' &&
387 isascii(*cp) && !isspace(*cp))
388 cp++;
389 n = *cp;
390 *cp = 0;
391 if (__inet_aton(net, &a)) {
392 statp->sort_list[nsort].addr = a;
393 if (ISSORTMASK(n)) {
394 *cp++ = n;
395 net = cp;
396 while (*cp && *cp != ';' &&
397 isascii(*cp) && !isspace(*cp))
398 cp++;
399 n = *cp;
400 *cp = 0;
401 if (__inet_aton(net, &a)) {
402 statp->sort_list[nsort].mask = a.s_addr;
403 } else {
404 statp->sort_list[nsort].mask =
405 net_mask(statp->sort_list[nsort].addr);
407 } else {
408 statp->sort_list[nsort].mask =
409 net_mask(statp->sort_list[nsort].addr);
411 nsort++;
413 *cp = n;
415 continue;
417 #endif
418 if (MATCH(buf, "options")) {
419 res_setoptions(statp, buf + sizeof("options") - 1, "conf");
420 continue;
423 statp->nscount = nservall;
424 #ifdef _LIBC
425 if (nservall - nserv > 0) {
426 statp->_u._ext.nscount6 = nservall - nserv;
427 /* We try IPv6 servers again. */
428 statp->ipv6_unavail = false;
430 #endif
431 #ifdef RESOLVSORT
432 statp->nsort = nsort;
433 #endif
434 (void) fclose(fp);
436 if (statp->defdname[0] == 0 &&
437 __gethostname(buf, sizeof(statp->defdname) - 1) == 0 &&
438 (cp = strchr(buf, '.')) != NULL)
439 strcpy(statp->defdname, cp + 1);
441 /* find components of local domain that might be searched */
442 if (havesearch == 0) {
443 pp = statp->dnsrch;
444 *pp++ = statp->defdname;
445 *pp = NULL;
447 #ifndef RFC1535
448 dots = 0;
449 for (cp = statp->defdname; *cp; cp++)
450 dots += (*cp == '.');
452 cp = statp->defdname;
453 while (pp < statp->dnsrch + MAXDFLSRCH) {
454 if (dots < LOCALDOMAINPARTS)
455 break;
456 cp = __rawmemchr(cp, '.') + 1; /* we know there is one */
457 *pp++ = cp;
458 dots--;
460 *pp = NULL;
461 #ifdef DEBUG
462 if (statp->options & RES_DEBUG) {
463 printf(";; res_init()... default dnsrch list:\n");
464 for (pp = statp->dnsrch; *pp; pp++)
465 printf(";;\t%s\n", *pp);
466 printf(";;\t..END..\n");
468 #endif
469 #endif /* !RFC1535 */
472 if ((cp = getenv("RES_OPTIONS")) != NULL)
473 res_setoptions(statp, cp, "env");
474 statp->options |= RES_INIT;
475 return (0);
478 static void
479 internal_function
480 res_setoptions(res_state statp, const char *options, const char *source) {
481 const char *cp = options;
482 int i;
484 #ifdef DEBUG
485 if (statp->options & RES_DEBUG)
486 printf(";; res_setoptions(\"%s\", \"%s\")...\n",
487 options, source);
488 #endif
489 while (*cp) {
490 /* skip leading and inner runs of spaces */
491 while (*cp == ' ' || *cp == '\t')
492 cp++;
493 /* search for and process individual options */
494 if (!strncmp(cp, "ndots:", sizeof("ndots:") - 1)) {
495 i = atoi(cp + sizeof("ndots:") - 1);
496 if (i <= RES_MAXNDOTS)
497 statp->ndots = i;
498 else
499 statp->ndots = RES_MAXNDOTS;
500 #ifdef DEBUG
501 if (statp->options & RES_DEBUG)
502 printf(";;\tndots=%d\n", statp->ndots);
503 #endif
504 } else if (!strncmp(cp, "timeout:", sizeof("timeout:") - 1)) {
505 i = atoi(cp + sizeof("timeout:") - 1);
506 if (i <= RES_MAXRETRANS)
507 statp->retrans = i;
508 else
509 statp->retrans = RES_MAXRETRANS;
510 } else if (!strncmp(cp, "attempts:", sizeof("attempts:") - 1)){
511 i = atoi(cp + sizeof("attempts:") - 1);
512 if (i <= RES_MAXRETRY)
513 statp->retry = i;
514 else
515 statp->retry = RES_MAXRETRY;
516 } else if (!strncmp(cp, "debug", sizeof("debug") - 1)) {
517 #ifdef DEBUG
518 if (!(statp->options & RES_DEBUG)) {
519 printf(";; res_setoptions(\"%s\", \"%s\")..\n",
520 options, source);
521 statp->options |= RES_DEBUG;
523 printf(";;\tdebug\n");
524 #endif
525 } else if (!strncmp(cp, "inet6", sizeof("inet6") - 1)) {
526 statp->options |= RES_USE_INET6;
527 } else if (!strncmp(cp, "ip6-bytestring",
528 sizeof("ip6-bytestring") - 1)) {
529 statp->options |= RES_USEBSTRING;
530 } else if (!strncmp(cp, "no-ip6-dotint",
531 sizeof("no-ip6-dotint") - 1)) {
532 statp->options |= RES_NOIP6DOTINT;
533 } else if (!strncmp(cp, "ip6-dotint",
534 sizeof("ip6-dotint") - 1)) {
535 statp->options &= ~RES_NOIP6DOTINT;
536 } else if (!strncmp(cp, "rotate", sizeof("rotate") - 1)) {
537 statp->options |= RES_ROTATE;
538 } else if (!strncmp(cp, "no-check-names",
539 sizeof("no-check-names") - 1)) {
540 statp->options |= RES_NOCHECKNAME;
541 } else if (!strncmp(cp, "edns0", sizeof("edns0") - 1)) {
542 statp->options |= RES_USE_EDNS0;
543 } else if (!strncmp(cp, "single-request-reopen",
544 sizeof("single-request-reopen") - 1)) {
545 statp->options |= RES_SNGLKUPREOP;
546 } else if (!strncmp(cp, "single-request",
547 sizeof("single-request") - 1)) {
548 statp->options |= RES_SNGLKUP;
549 } else {
550 /* XXX - print a warning here? */
552 /* skip to next run of spaces */
553 while (*cp && *cp != ' ' && *cp != '\t')
554 cp++;
558 #ifdef RESOLVSORT
559 /* XXX - should really support CIDR which means explicit masks always. */
560 static u_int32_t
561 net_mask(in) /* XXX - should really use system's version of this */
562 struct in_addr in;
564 register u_int32_t i = ntohl(in.s_addr);
566 if (IN_CLASSA(i))
567 return (htonl(IN_CLASSA_NET));
568 else if (IN_CLASSB(i))
569 return (htonl(IN_CLASSB_NET));
570 return (htonl(IN_CLASSC_NET));
572 #endif
574 u_int
575 res_randomid(void) {
576 return 0xffff & __getpid();
578 #ifdef _LIBC
579 libc_hidden_def (__res_randomid)
580 #endif
584 * This routine is for closing the socket if a virtual circuit is used and
585 * the program wants to close it. This provides support for endhostent()
586 * which expects to close the socket.
588 * This routine is not expected to be user visible.
590 void
591 __res_iclose(res_state statp, bool free_addr) {
592 int ns;
594 if (statp->_vcsock >= 0) {
595 close_not_cancel_no_status(statp->_vcsock);
596 statp->_vcsock = -1;
597 statp->_flags &= ~(RES_F_VC | RES_F_CONN);
599 #ifdef _LIBC
600 for (ns = 0; ns < MAXNS; ns++)
601 #else
602 for (ns = 0; ns < statp->_u._ext.nscount; ns++)
603 #endif
604 if (statp->_u._ext.nsaddrs[ns]) {
605 if (statp->_u._ext.nssocks[ns] != -1) {
606 close_not_cancel_no_status(statp->_u._ext.nssocks[ns]);
607 statp->_u._ext.nssocks[ns] = -1;
609 if (free_addr) {
610 free (statp->_u._ext.nsaddrs[ns]);
611 statp->_u._ext.nsaddrs[ns] = NULL;
614 statp->_u._ext.nsinit = 0;
616 libc_hidden_def (__res_iclose)
618 void
619 res_nclose(res_state statp)
621 __res_iclose (statp, true);
623 #ifdef _LIBC
624 libc_hidden_def (__res_nclose)
625 #endif
627 #ifdef _LIBC
628 # ifdef _LIBC_REENTRANT
629 /* This is called when a thread is exiting to free resources held in _res. */
630 static void __attribute__ ((section ("__libc_thread_freeres_fn")))
631 res_thread_freeres (void)
633 if (_res.nscount == 0)
634 /* Never called res_ninit. */
635 return;
637 __res_iclose (&_res, true); /* Close any VC sockets. */
639 /* Make sure we do a full re-initialization the next time. */
640 _res.options = 0;
642 text_set_element (__libc_thread_subfreeres, res_thread_freeres);
643 text_set_element (__libc_subfreeres, res_thread_freeres);
644 # endif
645 #endif