1 /* -*- buffer-read-only: t -*-
2 *
3 * reentr.c
4 *
5 * Copyright (C) 2002, 2003, 2005, 2006, 2007 by Larry Wall and others
6 *
7 * You may distribute under the terms of either the GNU General Public
8 * License or the Artistic License, as specified in the README file.
9 *
10 * !!!!!!! DO NOT EDIT THIS FILE !!!!!!!
11 * This file is built by regen/reentr.pl from data in regen/reentr.pl.
12 * Any changes made here will be lost!
13 */
14
15 /*
16 * "Saruman," I said, standing away from him, "only one hand at a time can
17 * wield the One, and you know that well, so do not trouble to say we!"
18 *
19 * [p.260 of _The Lord of the Rings_, II/ii: "The Council of Elrond"]
20 */
21
22 /*
23 * This file contains a collection of automatically created wrappers
24 * (created by running reentr.pl) for reentrant (thread-safe) versions of
25 * various library calls, such as getpwent_r. The wrapping is done so
26 * that other files like pp_sys.c calling those library functions need not
27 * care about the differences between various platforms' idiosyncrasies
28 * regarding these reentrant interfaces.
29 */
30
31 #include "EXTERN.h"
32 #define PERL_IN_REENTR_C
33 #include "perl.h"
34 #include "reentr.h"
35 #include "keywords.h"
36
37 #define RenewDouble(data_pointer, size_pointer, type) \
38 STMT_START { \
39 const size_t size = *(size_pointer) * 2; \
40 Renew((data_pointer), (size), type); \
41 *(size_pointer) = size; \
42 } STMT_END
43
44 void
Perl_reentrant_size(pTHX)45 Perl_reentrant_size(pTHX) {
46 PERL_UNUSED_CONTEXT;
47
48 /* Set the sizes of the reentrant buffers */
49
50 #ifdef USE_REENTRANT_API
51 # define REENTRANTSMALLSIZE 256 /* Make something up. */
52 # define REENTRANTUSUALSIZE 4096 /* Make something up. */
53
54 # ifdef HAS_ASCTIME_R
55 PL_reentrant_buffer->_asctime_size = REENTRANTSMALLSIZE;
56 # endif /* HAS_ASCTIME_R */
57
58 # ifdef HAS_CRYPT_R
59 # endif /* HAS_CRYPT_R */
60
61 # ifdef HAS_CTIME_R
62 PL_reentrant_buffer->_ctime_size = REENTRANTSMALLSIZE;
63 # endif /* HAS_CTIME_R */
64
65 # ifdef HAS_GETGRNAM_R
66 # if defined(HAS_SYSCONF) && defined(_SC_GETGR_R_SIZE_MAX) && !defined(__GLIBC__)
67 PL_reentrant_buffer->_grent_size = sysconf(_SC_GETGR_R_SIZE_MAX);
68 if (PL_reentrant_buffer->_grent_size == (size_t) -1)
69 PL_reentrant_buffer->_grent_size = REENTRANTUSUALSIZE;
70 # elif defined(__osf__) && defined(__alpha) && defined(SIABUFSIZ)
71 PL_reentrant_buffer->_grent_size = SIABUFSIZ;
72 # elif defined(__sgi)
73 PL_reentrant_buffer->_grent_size = BUFSIZ;
74 # else
75 PL_reentrant_buffer->_grent_size = REENTRANTUSUALSIZE;
76 # endif
77 # endif /* HAS_GETGRNAM_R */
78
79 # ifdef HAS_GETHOSTBYNAME_R
80 # if !(GETHOSTBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
81 PL_reentrant_buffer->_hostent_size = REENTRANTUSUALSIZE;
82 # endif
83 # endif /* HAS_GETHOSTBYNAME_R */
84
85 # ifdef HAS_GETLOGIN_R
86 PL_reentrant_buffer->_getlogin_size = REENTRANTSMALLSIZE;
87 # endif /* HAS_GETLOGIN_R */
88
89 # ifdef HAS_GETNETBYNAME_R
90 # if !(GETNETBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
91 PL_reentrant_buffer->_netent_size = REENTRANTUSUALSIZE;
92 # endif
93 # endif /* HAS_GETNETBYNAME_R */
94
95 # ifdef HAS_GETPROTOBYNAME_R
96 # if !(GETPROTOBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
97 PL_reentrant_buffer->_protoent_size = REENTRANTUSUALSIZE;
98 # endif
99 # endif /* HAS_GETPROTOBYNAME_R */
100
101 # ifdef HAS_GETPWNAM_R
102 # if defined(HAS_SYSCONF) && defined(_SC_GETPW_R_SIZE_MAX) && !defined(__GLIBC__)
103 PL_reentrant_buffer->_pwent_size = sysconf(_SC_GETPW_R_SIZE_MAX);
104 if (PL_reentrant_buffer->_pwent_size == (size_t) -1)
105 PL_reentrant_buffer->_pwent_size = REENTRANTUSUALSIZE;
106 # elif defined(__osf__) && defined(__alpha) && defined(SIABUFSIZ)
107 PL_reentrant_buffer->_pwent_size = SIABUFSIZ;
108 # elif defined(__sgi)
109 PL_reentrant_buffer->_pwent_size = BUFSIZ;
110 # else
111 PL_reentrant_buffer->_pwent_size = REENTRANTUSUALSIZE;
112 # endif
113 # endif /* HAS_GETPWNAM_R */
114
115 # ifdef HAS_GETSERVBYNAME_R
116 # if !(GETSERVBYNAME_R_PROTO == REENTRANT_PROTO_I_CCSD)
117 PL_reentrant_buffer->_servent_size = REENTRANTUSUALSIZE;
118 # endif
119 # endif /* HAS_GETSERVBYNAME_R */
120
121 # ifdef HAS_GETSPNAM_R
122 # if defined(HAS_SYSCONF) && defined(_SC_GETPW_R_SIZE_MAX) && !defined(__GLIBC__)
123 PL_reentrant_buffer->_spent_size = sysconf(_SC_GETPW_R_SIZE_MAX);
124 if (PL_reentrant_buffer->_spent_size == (size_t) -1)
125 PL_reentrant_buffer->_spent_size = REENTRANTUSUALSIZE;
126 # elif defined(__osf__) && defined(__alpha) && defined(SIABUFSIZ)
127 PL_reentrant_buffer->_spent_size = SIABUFSIZ;
128 # elif defined(__sgi)
129 PL_reentrant_buffer->_spent_size = BUFSIZ;
130 # else
131 PL_reentrant_buffer->_spent_size = REENTRANTUSUALSIZE;
132 # endif
133 # endif /* HAS_GETSPNAM_R */
134
135 # ifdef HAS_GMTIME_R
136 # endif /* HAS_GMTIME_R */
137
138 # ifdef HAS_LOCALTIME_R
139 # endif /* HAS_LOCALTIME_R */
140
141 # ifdef HAS_READDIR_R
142 /* This is the size Solaris recommends.
143 * (though we go static, should use pathconf() instead) */
144 PL_reentrant_buffer->_readdir_size = sizeof(struct dirent) + MAXPATHLEN + 1;
145 # endif /* HAS_READDIR_R */
146
147 # ifdef HAS_READDIR64_R
148 /* This is the size Solaris recommends.
149 * (though we go static, should use pathconf() instead) */
150 PL_reentrant_buffer->_readdir64_size = sizeof(struct dirent64) + MAXPATHLEN + 1;
151 # endif /* HAS_READDIR64_R */
152
153 # ifdef HAS_SETLOCALE_R
154 PL_reentrant_buffer->_setlocale_size = REENTRANTSMALLSIZE;
155 # endif /* HAS_SETLOCALE_R */
156
157 # ifdef HAS_STRERROR_R
158 PL_reentrant_buffer->_strerror_size = REENTRANTSMALLSIZE;
159 # endif /* HAS_STRERROR_R */
160
161 # ifdef HAS_TTYNAME_R
162 PL_reentrant_buffer->_ttyname_size = REENTRANTSMALLSIZE;
163 # endif /* HAS_TTYNAME_R */
164
165
166 #endif /* USE_REENTRANT_API */
167
168 }
169
170 void
Perl_reentrant_init(pTHX)171 Perl_reentrant_init(pTHX) {
172 PERL_UNUSED_CONTEXT;
173
174 /* Initialize the whole thing */
175
176 #ifdef USE_REENTRANT_API
177
178 Newx(PL_reentrant_buffer, 1, REENTR);
179 Perl_reentrant_size(aTHX);
180
181 # ifdef HAS_ASCTIME_R
182 Newx(PL_reentrant_buffer->_asctime_buffer, PL_reentrant_buffer->_asctime_size, char);
183 # endif /* HAS_ASCTIME_R */
184
185 # ifdef HAS_CRYPT_R
186 # if CRYPT_R_PROTO != REENTRANT_PROTO_B_CCD
187 PL_reentrant_buffer->_crypt_struct_buffer = 0;
188 # endif
189 # endif /* HAS_CRYPT_R */
190
191 # ifdef HAS_CTIME_R
192 Newx(PL_reentrant_buffer->_ctime_buffer, PL_reentrant_buffer->_ctime_size, char);
193 # endif /* HAS_CTIME_R */
194
195 # ifdef HAS_GETGRNAM_R
196 # ifdef USE_GRENT_FPTR
197 PL_reentrant_buffer->_grent_fptr = NULL;
198 # endif
199 Newx(PL_reentrant_buffer->_grent_buffer, PL_reentrant_buffer->_grent_size, char);
200 # endif /* HAS_GETGRNAM_R */
201
202 # ifdef HAS_GETHOSTBYNAME_R
203 # if !(GETHOSTBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
204 Newx(PL_reentrant_buffer->_hostent_buffer, PL_reentrant_buffer->_hostent_size, char);
205 # endif
206 # endif /* HAS_GETHOSTBYNAME_R */
207
208 # ifdef HAS_GETLOGIN_R
209 Newx(PL_reentrant_buffer->_getlogin_buffer, PL_reentrant_buffer->_getlogin_size, char);
210 # endif /* HAS_GETLOGIN_R */
211
212 # ifdef HAS_GETNETBYNAME_R
213 # if !(GETNETBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
214 Newx(PL_reentrant_buffer->_netent_buffer, PL_reentrant_buffer->_netent_size, char);
215 # endif
216 # endif /* HAS_GETNETBYNAME_R */
217
218 # ifdef HAS_GETPROTOBYNAME_R
219 # if !(GETPROTOBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
220 Newx(PL_reentrant_buffer->_protoent_buffer, PL_reentrant_buffer->_protoent_size, char);
221 # endif
222 # endif /* HAS_GETPROTOBYNAME_R */
223
224 # ifdef HAS_GETPWNAM_R
225 # ifdef USE_PWENT_FPTR
226 PL_reentrant_buffer->_pwent_fptr = NULL;
227 # endif
228 Newx(PL_reentrant_buffer->_pwent_buffer, PL_reentrant_buffer->_pwent_size, char);
229 # endif /* HAS_GETPWNAM_R */
230
231 # ifdef HAS_GETSERVBYNAME_R
232 # if !(GETSERVBYNAME_R_PROTO == REENTRANT_PROTO_I_CCSD)
233 Newx(PL_reentrant_buffer->_servent_buffer, PL_reentrant_buffer->_servent_size, char);
234 # endif
235 # endif /* HAS_GETSERVBYNAME_R */
236
237 # ifdef HAS_GETSPNAM_R
238 # ifdef USE_SPENT_FPTR
239 PL_reentrant_buffer->_spent_fptr = NULL;
240 # endif
241 Newx(PL_reentrant_buffer->_spent_buffer, PL_reentrant_buffer->_spent_size, char);
242 # endif /* HAS_GETSPNAM_R */
243
244 # ifdef HAS_GMTIME_R
245 # endif /* HAS_GMTIME_R */
246
247 # ifdef HAS_LOCALTIME_R
248 # endif /* HAS_LOCALTIME_R */
249
250 # ifdef HAS_READDIR_R
251 PL_reentrant_buffer->_readdir_struct = (struct dirent*)safemalloc(PL_reentrant_buffer->_readdir_size);
252 # endif /* HAS_READDIR_R */
253
254 # ifdef HAS_READDIR64_R
255 PL_reentrant_buffer->_readdir64_struct = (struct dirent64*)safemalloc(PL_reentrant_buffer->_readdir64_size);
256 # endif /* HAS_READDIR64_R */
257
258 # ifdef HAS_SETLOCALE_R
259 Newx(PL_reentrant_buffer->_setlocale_buffer, PL_reentrant_buffer->_setlocale_size, char);
260 # endif /* HAS_SETLOCALE_R */
261
262 # ifdef HAS_STRERROR_R
263 Newx(PL_reentrant_buffer->_strerror_buffer, PL_reentrant_buffer->_strerror_size, char);
264 # endif /* HAS_STRERROR_R */
265
266 # ifdef HAS_TTYNAME_R
267 Newx(PL_reentrant_buffer->_ttyname_buffer, PL_reentrant_buffer->_ttyname_size, char);
268 # endif /* HAS_TTYNAME_R */
269
270
271 #endif /* USE_REENTRANT_API */
272
273 }
274
275 void
Perl_reentrant_free(pTHX)276 Perl_reentrant_free(pTHX) {
277 PERL_UNUSED_CONTEXT;
278
279 /* Tear down */
280
281 #ifdef USE_REENTRANT_API
282
283 # ifdef HAS_ASCTIME_R
284 Safefree(PL_reentrant_buffer->_asctime_buffer);
285 # endif /* HAS_ASCTIME_R */
286
287 # ifdef HAS_CRYPT_R
288 # if CRYPT_R_PROTO != REENTRANT_PROTO_B_CCD
289 Safefree(PL_reentrant_buffer->_crypt_struct_buffer);
290 # endif
291 # endif /* HAS_CRYPT_R */
292
293 # ifdef HAS_CTIME_R
294 Safefree(PL_reentrant_buffer->_ctime_buffer);
295 # endif /* HAS_CTIME_R */
296
297 # ifdef HAS_GETGRNAM_R
298 Safefree(PL_reentrant_buffer->_grent_buffer);
299 # endif /* HAS_GETGRNAM_R */
300
301 # ifdef HAS_GETHOSTBYNAME_R
302 # if !(GETHOSTBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
303 Safefree(PL_reentrant_buffer->_hostent_buffer);
304 # endif
305 # endif /* HAS_GETHOSTBYNAME_R */
306
307 # ifdef HAS_GETLOGIN_R
308 Safefree(PL_reentrant_buffer->_getlogin_buffer);
309 # endif /* HAS_GETLOGIN_R */
310
311 # ifdef HAS_GETNETBYNAME_R
312 # if !(GETNETBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
313 Safefree(PL_reentrant_buffer->_netent_buffer);
314 # endif
315 # endif /* HAS_GETNETBYNAME_R */
316
317 # ifdef HAS_GETPROTOBYNAME_R
318 # if !(GETPROTOBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
319 Safefree(PL_reentrant_buffer->_protoent_buffer);
320 # endif
321 # endif /* HAS_GETPROTOBYNAME_R */
322
323 # ifdef HAS_GETPWNAM_R
324 Safefree(PL_reentrant_buffer->_pwent_buffer);
325 # endif /* HAS_GETPWNAM_R */
326
327 # ifdef HAS_GETSERVBYNAME_R
328 # if !(GETSERVBYNAME_R_PROTO == REENTRANT_PROTO_I_CCSD)
329 Safefree(PL_reentrant_buffer->_servent_buffer);
330 # endif
331 # endif /* HAS_GETSERVBYNAME_R */
332
333 # ifdef HAS_GETSPNAM_R
334 Safefree(PL_reentrant_buffer->_spent_buffer);
335 # endif /* HAS_GETSPNAM_R */
336
337 # ifdef HAS_GMTIME_R
338 # endif /* HAS_GMTIME_R */
339
340 # ifdef HAS_LOCALTIME_R
341 # endif /* HAS_LOCALTIME_R */
342
343 # ifdef HAS_READDIR_R
344 Safefree(PL_reentrant_buffer->_readdir_struct);
345 # endif /* HAS_READDIR_R */
346
347 # ifdef HAS_READDIR64_R
348 Safefree(PL_reentrant_buffer->_readdir64_struct);
349 # endif /* HAS_READDIR64_R */
350
351 # ifdef HAS_SETLOCALE_R
352 Safefree(PL_reentrant_buffer->_setlocale_buffer);
353 # endif /* HAS_SETLOCALE_R */
354
355 # ifdef HAS_STRERROR_R
356 Safefree(PL_reentrant_buffer->_strerror_buffer);
357 # endif /* HAS_STRERROR_R */
358
359 # ifdef HAS_TTYNAME_R
360 Safefree(PL_reentrant_buffer->_ttyname_buffer);
361 # endif /* HAS_TTYNAME_R */
362
363
364 Safefree(PL_reentrant_buffer);
365
366 #endif /* USE_REENTRANT_API */
367 }
368
369 void*
Perl_reentrant_retry(const char * f,...)370 Perl_reentrant_retry(const char *f, ...)
371 {
372 /* This function is set up to be called if the normal function returns
373 * failure with errno ERANGE, which indicates the buffer is too small.
374 * This function calls the failing one again with a larger buffer.
375 *
376 * What has happened is that, due to the magic of C preprocessor macro
377 * expansion, when the original code called function 'foo(args)', it was
378 * instead compiled into something like a call of 'foo_r(args, buffer)'
379 * Below we retry with 'foo', but the preprocessor has changed that into
380 * 'foo_r', so this function will end up calling itself recursively, each
381 * time with a larger buffer. If PERL_REENTRANT_MAXSIZE is defined, it
382 * won't increase beyond that, instead failing. */
383
384 void *retptr = NULL;
385 va_list ap;
386
387 I32 key = 0;
388
389 #ifdef USE_REENTRANT_API
390
391 dTHX;
392
393 key = Perl_keyword (aTHX_ f, strlen(f), FALSE /* not feature enabled */);
394
395 /* Easier to special case this here than in embed.pl. (Look at what it
396 generates for proto.h) */
397 PERL_ARGS_ASSERT_REENTRANT_RETRY;
398
399 #endif
400
401 if (key == 0) {
402
403 #ifdef HAS_GETSPNAM_R
404
405 /* This is a #define as has no corresponding keyword */
406 if (strEQ(f, "getspnam")) {
407 key = KEY_getspnam;
408 }
409
410 #endif
411
412 }
413 else if (key < 0) {
414 key = -key;
415 }
416
417 va_start(ap, f);
418
419 #ifdef USE_REENTRANT_API
420
421 switch (key) {
422
423 # ifdef USE_HOSTENT_BUFFER
424
425 case KEY_gethostbyaddr:
426 case KEY_gethostbyname:
427 case KEY_endhostent:
428 {
429 char * host_addr;
430 Size_t asize;
431 char * host_name;
432 int anint;
433
434 # ifdef PERL_REENTRANT_MAXSIZE
435 if (PL_reentrant_buffer->_hostent_size <=
436 PERL_REENTRANT_MAXSIZE / 2)
437 # endif
438 RenewDouble(PL_reentrant_buffer->_hostent_buffer,
439 &PL_reentrant_buffer->_hostent_size, char);
440 switch (key) {
441 case KEY_gethostbyaddr:
442 host_addr = va_arg(ap, char *);
443 asize = va_arg(ap, Size_t);
444 anint = va_arg(ap, int);
445 /* socklen_t is what Posix 2001 says this should be */
446 retptr = gethostbyaddr(host_addr, (socklen_t) asize, anint); break;
447 case KEY_gethostbyname:
448 host_name = va_arg(ap, char *);
449 retptr = gethostbyname(host_name); break;
450 case KEY_endhostent:
451 retptr = gethostent(); break;
452 default:
453 SETERRNO(ERANGE, LIB_INVARG);
454 break;
455 }
456 }
457 break;
458
459 # endif
460 # ifdef USE_GRENT_BUFFER
461
462 case KEY_getgrent:
463 case KEY_getgrgid:
464 case KEY_getgrnam:
465 {
466 char * name;
467 Gid_t gid;
468
469 # ifdef PERL_REENTRANT_MAXSIZE
470 if (PL_reentrant_buffer->_grent_size <=
471 PERL_REENTRANT_MAXSIZE / 2)
472 # endif
473 RenewDouble(PL_reentrant_buffer->_grent_buffer,
474 &PL_reentrant_buffer->_grent_size, char);
475 switch (key) {
476 case KEY_getgrnam:
477 name = va_arg(ap, char *);
478 retptr = getgrnam(name); break;
479 case KEY_getgrgid:
480 # if Gid_t_size < INTSIZE
481 gid = (Gid_t)va_arg(ap, int);
482 # else
483 gid = va_arg(ap, Gid_t);
484 # endif
485 retptr = getgrgid(gid); break;
486 case KEY_getgrent:
487 retptr = getgrent(); break;
488 default:
489 SETERRNO(ERANGE, LIB_INVARG);
490 break;
491 }
492 }
493 break;
494
495 # endif
496 # ifdef USE_NETENT_BUFFER
497
498 case KEY_getnetbyaddr:
499 case KEY_getnetbyname:
500 case KEY_getnetent:
501 {
502 char * name;
503 Netdb_net_t net;
504 int anint;
505
506 # ifdef PERL_REENTRANT_MAXSIZE
507 if (PL_reentrant_buffer->_netent_size <=
508 PERL_REENTRANT_MAXSIZE / 2)
509 # endif
510 RenewDouble(PL_reentrant_buffer->_netent_buffer,
511 &PL_reentrant_buffer->_netent_size, char);
512 switch (key) {
513 case KEY_getnetbyaddr:
514 net = va_arg(ap, Netdb_net_t);
515 anint = va_arg(ap, int);
516 retptr = getnetbyaddr(net, anint); break;
517 case KEY_getnetbyname:
518 name = va_arg(ap, char *);
519 retptr = getnetbyname(name); break;
520 case KEY_getnetent:
521 retptr = getnetent(); break;
522 default:
523 SETERRNO(ERANGE, LIB_INVARG);
524 break;
525 }
526 }
527 break;
528
529 # endif
530 # ifdef USE_PWENT_BUFFER
531
532 case KEY_getpwnam:
533 case KEY_getpwuid:
534 case KEY_getpwent:
535 {
536 Uid_t uid;
537 char * name;
538
539 # ifdef PERL_REENTRANT_MAXSIZE
540 if (PL_reentrant_buffer->_pwent_size <=
541 PERL_REENTRANT_MAXSIZE / 2)
542
543 # endif
544 RenewDouble(PL_reentrant_buffer->_pwent_buffer,
545 &PL_reentrant_buffer->_pwent_size, char);
546 switch (key) {
547 case KEY_getpwnam:
548 name = va_arg(ap, char *);
549 retptr = getpwnam(name); break;
550 case KEY_getpwuid:
551
552 # if Uid_t_size < INTSIZE
553 uid = (Uid_t)va_arg(ap, int);
554 # else
555 uid = va_arg(ap, Uid_t);
556 # endif
557 retptr = getpwuid(uid); break;
558
559 # if defined(HAS_GETPWENT) || defined(HAS_GETPWENT_R)
560
561 case KEY_getpwent:
562 retptr = getpwent(); break;
563 # endif
564 default:
565 SETERRNO(ERANGE, LIB_INVARG);
566 break;
567 }
568 }
569 break;
570
571 # endif
572 # ifdef USE_SPENT_BUFFER
573
574 case KEY_getspnam:
575 {
576 char * name;
577
578 # ifdef PERL_REENTRANT_MAXSIZE
579 if (PL_reentrant_buffer->_spent_size <=
580 PERL_REENTRANT_MAXSIZE / 2)
581
582 # endif
583 RenewDouble(PL_reentrant_buffer->_spent_buffer,
584 &PL_reentrant_buffer->_spent_size, char);
585 switch (key) {
586 case KEY_getspnam:
587 name = va_arg(ap, char *);
588 retptr = getspnam(name); break;
589 default:
590 SETERRNO(ERANGE, LIB_INVARG);
591 break;
592 }
593 }
594 break;
595
596 # endif
597 # ifdef USE_PROTOENT_BUFFER
598
599 case KEY_getprotobyname:
600 case KEY_getprotobynumber:
601 case KEY_getprotoent:
602 {
603 char * name;
604 int anint;
605
606 # ifdef PERL_REENTRANT_MAXSIZE
607 if (PL_reentrant_buffer->_protoent_size <=
608 PERL_REENTRANT_MAXSIZE / 2)
609 # endif
610 RenewDouble(PL_reentrant_buffer->_protoent_buffer,
611 &PL_reentrant_buffer->_protoent_size, char);
612 switch (key) {
613 case KEY_getprotobyname:
614 name = va_arg(ap, char *);
615 retptr = getprotobyname(name); break;
616 case KEY_getprotobynumber:
617 anint = va_arg(ap, int);
618 retptr = getprotobynumber(anint); break;
619 case KEY_getprotoent:
620 retptr = getprotoent(); break;
621 default:
622 SETERRNO(ERANGE, LIB_INVARG);
623 break;
624 }
625 }
626 break;
627
628 # endif
629 # ifdef USE_SERVENT_BUFFER
630
631 case KEY_getservbyname:
632 case KEY_getservbyport:
633 case KEY_getservent:
634 {
635 char * name;
636 char * proto;
637 int anint;
638
639 # ifdef PERL_REENTRANT_MAXSIZE
640 if (PL_reentrant_buffer->_servent_size <=
641 PERL_REENTRANT_MAXSIZE / 2)
642 # endif
643 RenewDouble(PL_reentrant_buffer->_servent_buffer,
644 &PL_reentrant_buffer->_servent_size, char);
645 switch (key) {
646 case KEY_getservbyname:
647 name = va_arg(ap, char *);
648 proto = va_arg(ap, char *);
649 retptr = getservbyname(name, proto); break;
650 case KEY_getservbyport:
651 anint = va_arg(ap, int);
652 name = va_arg(ap, char *);
653 retptr = getservbyport(anint, name); break;
654 case KEY_getservent:
655 retptr = getservent(); break;
656 default:
657 SETERRNO(ERANGE, LIB_INVARG);
658 break;
659 }
660 }
661 break;
662
663 # endif
664
665 default:
666 /* Not known how to retry, so just fail. */
667 break;
668 }
669
670 #else
671
672 PERL_UNUSED_ARG(f);
673
674 #endif
675
676 va_end(ap);
677 return retptr;
678 }
679
680 /* ex: set ro: */
681