reentr.c

   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 reentr.pl from data in reentr.pl.
  12  *
  13  * "Saruman," I said, standing away from him, "only one hand at a time can
  14  *  wield the One, and you know that well, so do not trouble to say we!"
  15  *
  16  * This file contains a collection of automatically created wrappers
  17  * (created by running reentr.pl) for reentrant (thread-safe) versions of
  18  * various library calls, such as getpwent_r.  The wrapping is done so
  19  * that other files like pp_sys.c calling those library functions need not
  20  * care about the differences between various platforms' idiosyncrasies
  21  * regarding these reentrant interfaces.
  22  */
  23
  24 #include "EXTERN.h"
  25 #define PERL_IN_REENTR_C
  26 #include "perl.h"
  27 #include "reentr.h"
  28
  29 void
  30 Perl_reentrant_size(pTHX) {
  31 #ifdef USE_REENTRANT_API
  32 #define REENTRANTSMALLSIZE       256    /* Make something up. */
  33 #define REENTRANTUSUALSIZE      4096    /* Make something up. */
  34 #ifdef HAS_ASCTIME_R
  35         PL_reentrant_buffer->_asctime_size = REENTRANTSMALLSIZE;
  36 #endif /* HAS_ASCTIME_R */
  37 #ifdef HAS_CRYPT_R
  38 #endif /* HAS_CRYPT_R */
  39 #ifdef HAS_CTIME_R
  40         PL_reentrant_buffer->_ctime_size = REENTRANTSMALLSIZE;
  41 #endif /* HAS_CTIME_R */
  42 #ifdef HAS_DRAND48_R
  43 #endif /* HAS_DRAND48_R */
  44 #ifdef HAS_GETGRNAM_R
  45 #   if defined(HAS_SYSCONF) && defined(_SC_GETGR_R_SIZE_MAX) && !defined(__GLIBC__)
  46         PL_reentrant_buffer->_grent_size = sysconf(_SC_GETGR_R_SIZE_MAX);
  47         if (PL_reentrant_buffer->_grent_size == (size_t) -1)
  48                 PL_reentrant_buffer->_grent_size = REENTRANTUSUALSIZE;
  49 #   else
  50 #       if defined(__osf__) && defined(__alpha) && defined(SIABUFSIZ)
  51         PL_reentrant_buffer->_grent_size = SIABUFSIZ;
  52 #       else
  53 #           ifdef __sgi
  54         PL_reentrant_buffer->_grent_size = BUFSIZ;
  55 #           else
  56         PL_reentrant_buffer->_grent_size = REENTRANTUSUALSIZE;
  57 #           endif
  58 #       endif
  59 #   endif
  60 #endif /* HAS_GETGRNAM_R */
  61 #ifdef HAS_GETHOSTBYNAME_R
  62 #if   !(GETHOSTBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
  63         PL_reentrant_buffer->_hostent_size = REENTRANTUSUALSIZE;
  64 #endif
  65 #endif /* HAS_GETHOSTBYNAME_R */
  66 #ifdef HAS_GETLOGIN_R
  67         PL_reentrant_buffer->_getlogin_size = REENTRANTSMALLSIZE;
  68 #endif /* HAS_GETLOGIN_R */
  69 #ifdef HAS_GETNETBYNAME_R
  70 #if   !(GETNETBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
  71         PL_reentrant_buffer->_netent_size = REENTRANTUSUALSIZE;
  72 #endif
  73 #endif /* HAS_GETNETBYNAME_R */
  74 #ifdef HAS_GETPROTOBYNAME_R
  75 #if   !(GETPROTOBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
  76         PL_reentrant_buffer->_protoent_size = REENTRANTUSUALSIZE;
  77 #endif
  78 #endif /* HAS_GETPROTOBYNAME_R */
  79 #ifdef HAS_GETPWNAM_R
  80 #   if defined(HAS_SYSCONF) && defined(_SC_GETPW_R_SIZE_MAX) && !defined(__GLIBC__)
  81         PL_reentrant_buffer->_pwent_size = sysconf(_SC_GETPW_R_SIZE_MAX);
  82         if (PL_reentrant_buffer->_pwent_size == (size_t) -1)
  83                 PL_reentrant_buffer->_pwent_size = REENTRANTUSUALSIZE;
  84 #   else
  85 #       if defined(__osf__) && defined(__alpha) && defined(SIABUFSIZ)
  86         PL_reentrant_buffer->_pwent_size = SIABUFSIZ;
  87 #       else
  88 #           ifdef __sgi
  89         PL_reentrant_buffer->_pwent_size = BUFSIZ;
  90 #           else
  91         PL_reentrant_buffer->_pwent_size = REENTRANTUSUALSIZE;
  92 #           endif
  93 #       endif
  94 #   endif
  95 #endif /* HAS_GETPWNAM_R */
  96 #ifdef HAS_GETSERVBYNAME_R
  97 #if   !(GETSERVBYNAME_R_PROTO == REENTRANT_PROTO_I_CCSD)
  98         PL_reentrant_buffer->_servent_size = REENTRANTUSUALSIZE;
  99 #endif
 100 #endif /* HAS_GETSERVBYNAME_R */
 101 #ifdef HAS_GETSPNAM_R
 102 #   if defined(HAS_SYSCONF) && defined(_SC_GETPW_R_SIZE_MAX) && !defined(__GLIBC__)
 103         PL_reentrant_buffer->_spent_size = sysconf(_SC_GETPW_R_SIZE_MAX);
 104         if (PL_reentrant_buffer->_spent_size == (size_t) -1)
 105                 PL_reentrant_buffer->_spent_size = REENTRANTUSUALSIZE;
 106 #   else
 107 #       if defined(__osf__) && defined(__alpha) && defined(SIABUFSIZ)
 108         PL_reentrant_buffer->_spent_size = SIABUFSIZ;
 109 #       else
 110 #           ifdef __sgi
 111         PL_reentrant_buffer->_spent_size = BUFSIZ;
 112 #           else
 113         PL_reentrant_buffer->_spent_size = REENTRANTUSUALSIZE;
 114 #           endif
 115 #       endif
 116 #   endif
 117 #endif /* HAS_GETSPNAM_R */
 118 #ifdef HAS_GMTIME_R
 119 #endif /* HAS_GMTIME_R */
 120 #ifdef HAS_LOCALTIME_R
 121 #endif /* HAS_LOCALTIME_R */
 122 #ifdef HAS_RANDOM_R
 123 #endif /* HAS_RANDOM_R */
 124 #ifdef HAS_READDIR_R
 125         /* This is the size Solaris recommends.
 126          * (though we go static, should use pathconf() instead) */
 127         PL_reentrant_buffer->_readdir_size = sizeof(struct dirent) + MAXPATHLEN + 1;
 128 #endif /* HAS_READDIR_R */
 129 #ifdef HAS_READDIR64_R
 130         /* This is the size Solaris recommends.
 131          * (though we go static, should use pathconf() instead) */
 132         PL_reentrant_buffer->_readdir64_size = sizeof(struct dirent64) + MAXPATHLEN + 1;
 133 #endif /* HAS_READDIR64_R */
 134 #ifdef HAS_SETLOCALE_R
 135         PL_reentrant_buffer->_setlocale_size = REENTRANTSMALLSIZE;
 136 #endif /* HAS_SETLOCALE_R */
 137 #ifdef HAS_SRANDOM_R
 138 #endif /* HAS_SRANDOM_R */
 139 #ifdef HAS_STRERROR_R
 140         PL_reentrant_buffer->_strerror_size = REENTRANTSMALLSIZE;
 141 #endif /* HAS_STRERROR_R */
 142 #ifdef HAS_TTYNAME_R
 143         PL_reentrant_buffer->_ttyname_size = REENTRANTSMALLSIZE;
 144 #endif /* HAS_TTYNAME_R */
 145
 146 #endif /* USE_REENTRANT_API */
 147 }
 148
 149 void
 150 Perl_reentrant_init(pTHX) {
 151 #ifdef USE_REENTRANT_API
 152         Newx(PL_reentrant_buffer, 1, REENTR);
 153         Perl_reentrant_size(aTHX);
 154 #ifdef HAS_ASCTIME_R
 155         Newx(PL_reentrant_buffer->_asctime_buffer, PL_reentrant_buffer->_asctime_size, char);
 156 #endif /* HAS_ASCTIME_R */
 157 #ifdef HAS_CRYPT_R
 158 #if CRYPT_R_PROTO != REENTRANT_PROTO_B_CCD
 159         PL_reentrant_buffer->_crypt_struct_buffer = 0;
 160 #endif
 161 #endif /* HAS_CRYPT_R */
 162 #ifdef HAS_CTIME_R
 163         Newx(PL_reentrant_buffer->_ctime_buffer, PL_reentrant_buffer->_ctime_size, char);
 164 #endif /* HAS_CTIME_R */
 165 #ifdef HAS_DRAND48_R
 166 #endif /* HAS_DRAND48_R */
 167 #ifdef HAS_GETGRNAM_R
 168 #   ifdef USE_GRENT_FPTR
 169         PL_reentrant_buffer->_grent_fptr = NULL;
 170 #   endif
 171         Newx(PL_reentrant_buffer->_grent_buffer, PL_reentrant_buffer->_grent_size, char);
 172 #endif /* HAS_GETGRNAM_R */
 173 #ifdef HAS_GETHOSTBYNAME_R
 174 #if   !(GETHOSTBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
 175         Newx(PL_reentrant_buffer->_hostent_buffer, PL_reentrant_buffer->_hostent_size, char);
 176 #endif
 177 #endif /* HAS_GETHOSTBYNAME_R */
 178 #ifdef HAS_GETLOGIN_R
 179         Newx(PL_reentrant_buffer->_getlogin_buffer, PL_reentrant_buffer->_getlogin_size, char);
 180 #endif /* HAS_GETLOGIN_R */
 181 #ifdef HAS_GETNETBYNAME_R
 182 #if   !(GETNETBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
 183         Newx(PL_reentrant_buffer->_netent_buffer, PL_reentrant_buffer->_netent_size, char);
 184 #endif
 185 #endif /* HAS_GETNETBYNAME_R */
 186 #ifdef HAS_GETPROTOBYNAME_R
 187 #if   !(GETPROTOBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
 188         Newx(PL_reentrant_buffer->_protoent_buffer, PL_reentrant_buffer->_protoent_size, char);
 189 #endif
 190 #endif /* HAS_GETPROTOBYNAME_R */
 191 #ifdef HAS_GETPWNAM_R
 192 #   ifdef USE_PWENT_FPTR
 193         PL_reentrant_buffer->_pwent_fptr = NULL;
 194 #   endif
 195         Newx(PL_reentrant_buffer->_pwent_buffer, PL_reentrant_buffer->_pwent_size, char);
 196 #endif /* HAS_GETPWNAM_R */
 197 #ifdef HAS_GETSERVBYNAME_R
 198 #if   !(GETSERVBYNAME_R_PROTO == REENTRANT_PROTO_I_CCSD)
 199         Newx(PL_reentrant_buffer->_servent_buffer, PL_reentrant_buffer->_servent_size, char);
 200 #endif
 201 #endif /* HAS_GETSERVBYNAME_R */
 202 #ifdef HAS_GETSPNAM_R
 203 #   ifdef USE_SPENT_FPTR
 204         PL_reentrant_buffer->_spent_fptr = NULL;
 205 #   endif
 206         Newx(PL_reentrant_buffer->_spent_buffer, PL_reentrant_buffer->_spent_size, char);
 207 #endif /* HAS_GETSPNAM_R */
 208 #ifdef HAS_GMTIME_R
 209 #endif /* HAS_GMTIME_R */
 210 #ifdef HAS_LOCALTIME_R
 211 #endif /* HAS_LOCALTIME_R */
 212 #ifdef HAS_RANDOM_R
 213 #endif /* HAS_RANDOM_R */
 214 #ifdef HAS_READDIR_R
 215         PL_reentrant_buffer->_readdir_struct = (struct dirent*)safemalloc(PL_reentrant_buffer->_readdir_size);
 216 #endif /* HAS_READDIR_R */
 217 #ifdef HAS_READDIR64_R
 218         PL_reentrant_buffer->_readdir64_struct = (struct dirent64*)safemalloc(PL_reentrant_buffer->_readdir64_size);
 219 #endif /* HAS_READDIR64_R */
 220 #ifdef HAS_SETLOCALE_R
 221         Newx(PL_reentrant_buffer->_setlocale_buffer, PL_reentrant_buffer->_setlocale_size, char);
 222 #endif /* HAS_SETLOCALE_R */
 223 #ifdef HAS_SRANDOM_R
 224 #endif /* HAS_SRANDOM_R */
 225 #ifdef HAS_STRERROR_R
 226         Newx(PL_reentrant_buffer->_strerror_buffer, PL_reentrant_buffer->_strerror_size, char);
 227 #endif /* HAS_STRERROR_R */
 228 #ifdef HAS_TTYNAME_R
 229         Newx(PL_reentrant_buffer->_ttyname_buffer, PL_reentrant_buffer->_ttyname_size, char);
 230 #endif /* HAS_TTYNAME_R */
 231
 232 #endif /* USE_REENTRANT_API */
 233 }
 234
 235 void
 236 Perl_reentrant_free(pTHX) {
 237 #ifdef USE_REENTRANT_API
 238 #ifdef HAS_ASCTIME_R
 239         Safefree(PL_reentrant_buffer->_asctime_buffer);
 240 #endif /* HAS_ASCTIME_R */
 241 #ifdef HAS_CRYPT_R
 242 #if CRYPT_R_PROTO != REENTRANT_PROTO_B_CCD
 243         Safefree(PL_reentrant_buffer->_crypt_struct_buffer);
 244 #endif
 245 #endif /* HAS_CRYPT_R */
 246 #ifdef HAS_CTIME_R
 247         Safefree(PL_reentrant_buffer->_ctime_buffer);
 248 #endif /* HAS_CTIME_R */
 249 #ifdef HAS_DRAND48_R
 250 #endif /* HAS_DRAND48_R */
 251 #ifdef HAS_GETGRNAM_R
 252         Safefree(PL_reentrant_buffer->_grent_buffer);
 253 #endif /* HAS_GETGRNAM_R */
 254 #ifdef HAS_GETHOSTBYNAME_R
 255 #if   !(GETHOSTBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
 256         Safefree(PL_reentrant_buffer->_hostent_buffer);
 257 #endif
 258 #endif /* HAS_GETHOSTBYNAME_R */
 259 #ifdef HAS_GETLOGIN_R
 260         Safefree(PL_reentrant_buffer->_getlogin_buffer);
 261 #endif /* HAS_GETLOGIN_R */
 262 #ifdef HAS_GETNETBYNAME_R
 263 #if   !(GETNETBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
 264         Safefree(PL_reentrant_buffer->_netent_buffer);
 265 #endif
 266 #endif /* HAS_GETNETBYNAME_R */
 267 #ifdef HAS_GETPROTOBYNAME_R
 268 #if   !(GETPROTOBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
 269         Safefree(PL_reentrant_buffer->_protoent_buffer);
 270 #endif
 271 #endif /* HAS_GETPROTOBYNAME_R */
 272 #ifdef HAS_GETPWNAM_R
 273         Safefree(PL_reentrant_buffer->_pwent_buffer);
 274 #endif /* HAS_GETPWNAM_R */
 275 #ifdef HAS_GETSERVBYNAME_R
 276 #if   !(GETSERVBYNAME_R_PROTO == REENTRANT_PROTO_I_CCSD)
 277         Safefree(PL_reentrant_buffer->_servent_buffer);
 278 #endif
 279 #endif /* HAS_GETSERVBYNAME_R */
 280 #ifdef HAS_GETSPNAM_R
 281         Safefree(PL_reentrant_buffer->_spent_buffer);
 282 #endif /* HAS_GETSPNAM_R */
 283 #ifdef HAS_GMTIME_R
 284 #endif /* HAS_GMTIME_R */
 285 #ifdef HAS_LOCALTIME_R
 286 #endif /* HAS_LOCALTIME_R */
 287 #ifdef HAS_RANDOM_R
 288 #endif /* HAS_RANDOM_R */
 289 #ifdef HAS_READDIR_R
 290         Safefree(PL_reentrant_buffer->_readdir_struct);
 291 #endif /* HAS_READDIR_R */
 292 #ifdef HAS_READDIR64_R
 293         Safefree(PL_reentrant_buffer->_readdir64_struct);
 294 #endif /* HAS_READDIR64_R */
 295 #ifdef HAS_SETLOCALE_R
 296         Safefree(PL_reentrant_buffer->_setlocale_buffer);
 297 #endif /* HAS_SETLOCALE_R */
 298 #ifdef HAS_SRANDOM_R
 299 #endif /* HAS_SRANDOM_R */
 300 #ifdef HAS_STRERROR_R
 301         Safefree(PL_reentrant_buffer->_strerror_buffer);
 302 #endif /* HAS_STRERROR_R */
 303 #ifdef HAS_TTYNAME_R
 304         Safefree(PL_reentrant_buffer->_ttyname_buffer);
 305 #endif /* HAS_TTYNAME_R */
 306
 307         Safefree(PL_reentrant_buffer);
 308 #endif /* USE_REENTRANT_API */
 309 }
 310
 311 void*
 312 Perl_reentrant_retry(const char *f, ...)
 313 {
 314     dTHX;
 315     void *retptr = NULL;
 316     va_list ap;
 317     va_start(ap, f);
 318 #ifdef USE_REENTRANT_API
 319 #  if defined(USE_HOSTENT_BUFFER) || defined(USE_GRENT_BUFFER) || defined(USE_NETENT_BUFFER) || defined(USE_PWENT_BUFFER) || defined(USE_PROTOENT_BUFFER) || defined(USE_SERVENT_BUFFER)
 320     void *p0;
 321 #  endif
 322 #  if defined(USE_SERVENT_BUFFER)
 323     void *p1;
 324 #  endif
 325 #  if defined(USE_HOSTENT_BUFFER)
 326     size_t asize;
 327 #  endif
 328 #  if defined(USE_HOSTENT_BUFFER) || defined(USE_NETENT_BUFFER) || defined(USE_PROTOENT_BUFFER) || defined(USE_SERVENT_BUFFER)
 329     int anint;
 330 #  endif
 331
 332     switch (PL_op->op_type) {
 333 #ifdef USE_HOSTENT_BUFFER
 334     case OP_GHBYADDR:
 335     case OP_GHBYNAME:
 336     case OP_GHOSTENT:
 337         {
 338 #ifdef PERL_REENTRANT_MAXSIZE
 339             if (PL_reentrant_buffer->_hostent_size <=
 340                 PERL_REENTRANT_MAXSIZE / 2)
 341 #endif
 342             {
 343                 PL_reentrant_buffer->_hostent_size *= 2;
 344                 Renew(PL_reentrant_buffer->_hostent_buffer,
 345                       PL_reentrant_buffer->_hostent_size, char);
 346                 switch (PL_op->op_type) {
 347                 case OP_GHBYADDR:
 348                     p0    = va_arg(ap, void *);
 349                     asize = va_arg(ap, size_t);
 350                     anint  = va_arg(ap, int);
 351                     retptr = gethostbyaddr(p0, asize, anint); break;
 352                 case OP_GHBYNAME:
 353                     p0 = va_arg(ap, void *);
 354                     retptr = gethostbyname((char *)p0); break;
 355                 case OP_GHOSTENT:
 356                     retptr = gethostent(); break;
 357                 default:
 358                     SETERRNO(ERANGE, LIB_INVARG);
 359                     break;
 360                 }
 361             }
 362         }
 363         break;
 364 #endif
 365 #ifdef USE_GRENT_BUFFER
 366     case OP_GGRNAM:
 367     case OP_GGRGID:
 368     case OP_GGRENT:
 369         {
 370 #ifdef PERL_REENTRANT_MAXSIZE
 371             if (PL_reentrant_buffer->_grent_size <=
 372                 PERL_REENTRANT_MAXSIZE / 2)
 373 #endif
 374             {
 375                 Gid_t gid;
 376                 PL_reentrant_buffer->_grent_size *= 2;
 377                 Renew(PL_reentrant_buffer->_grent_buffer,
 378                       PL_reentrant_buffer->_grent_size, char);
 379                 switch (PL_op->op_type) {
 380                 case OP_GGRNAM:
 381                     p0 = va_arg(ap, void *);
 382                     retptr = getgrnam((char *)p0); break;
 383                 case OP_GGRGID:
 384 #if Gid_t_size < INTSIZE
 385                     gid = (Gid_t)va_arg(ap, int);
 386 #else
 387                     gid = va_arg(ap, Gid_t);
 388 #endif
 389                     retptr = getgrgid(gid); break;
 390                 case OP_GGRENT:
 391                     retptr = getgrent(); break;
 392                 default:
 393                     SETERRNO(ERANGE, LIB_INVARG);
 394                     break;
 395                 }
 396             }
 397         }
 398         break;
 399 #endif
 400 #ifdef USE_NETENT_BUFFER
 401     case OP_GNBYADDR:
 402     case OP_GNBYNAME:
 403     case OP_GNETENT:
 404         {
 405 #ifdef PERL_REENTRANT_MAXSIZE
 406             if (PL_reentrant_buffer->_netent_size <=
 407                 PERL_REENTRANT_MAXSIZE / 2)
 408 #endif
 409             {
 410                 Netdb_net_t net;
 411                 PL_reentrant_buffer->_netent_size *= 2;
 412                 Renew(PL_reentrant_buffer->_netent_buffer,
 413                       PL_reentrant_buffer->_netent_size, char);
 414                 switch (PL_op->op_type) {
 415                 case OP_GNBYADDR:
 416                     net = va_arg(ap, Netdb_net_t);
 417                     anint = va_arg(ap, int);
 418                     retptr = getnetbyaddr(net, anint); break;
 419                 case OP_GNBYNAME:
 420                     p0 = va_arg(ap, void *);
 421                     retptr = getnetbyname((char *)p0); break;
 422                 case OP_GNETENT:
 423                     retptr = getnetent(); break;
 424                 default:
 425                     SETERRNO(ERANGE, LIB_INVARG);
 426                     break;
 427                 }
 428             }
 429         }
 430         break;
 431 #endif
 432 #ifdef USE_PWENT_BUFFER
 433     case OP_GPWNAM:
 434     case OP_GPWUID:
 435     case OP_GPWENT:
 436         {
 437 #ifdef PERL_REENTRANT_MAXSIZE
 438             if (PL_reentrant_buffer->_pwent_size <=
 439                 PERL_REENTRANT_MAXSIZE / 2)
 440 #endif
 441             {
 442                 Uid_t uid;
 443                 PL_reentrant_buffer->_pwent_size *= 2;
 444                 Renew(PL_reentrant_buffer->_pwent_buffer,
 445                       PL_reentrant_buffer->_pwent_size, char);
 446                 switch (PL_op->op_type) {
 447                 case OP_GPWNAM:
 448                     p0 = va_arg(ap, void *);
 449                     retptr = getpwnam((char *)p0); break;
 450                 case OP_GPWUID:
 451 #if Uid_t_size < INTSIZE
 452                     uid = (Uid_t)va_arg(ap, int);
 453 #else
 454                     uid = va_arg(ap, Uid_t);
 455 #endif
 456                     retptr = getpwuid(uid); break;
 457                 case OP_GPWENT:
 458                     retptr = getpwent(); break;
 459                 default:
 460                     SETERRNO(ERANGE, LIB_INVARG);
 461                     break;
 462                 }
 463             }
 464         }
 465         break;
 466 #endif
 467 #ifdef USE_PROTOENT_BUFFER
 468     case OP_GPBYNAME:
 469     case OP_GPBYNUMBER:
 470     case OP_GPROTOENT:
 471         {
 472 #ifdef PERL_REENTRANT_MAXSIZE
 473             if (PL_reentrant_buffer->_protoent_size <=
 474                 PERL_REENTRANT_MAXSIZE / 2)
 475 #endif
 476             {
 477                 PL_reentrant_buffer->_protoent_size *= 2;
 478                 Renew(PL_reentrant_buffer->_protoent_buffer,
 479                       PL_reentrant_buffer->_protoent_size, char);
 480                 switch (PL_op->op_type) {
 481                 case OP_GPBYNAME:
 482                     p0 = va_arg(ap, void *);
 483                     retptr = getprotobyname((char *)p0); break;
 484                 case OP_GPBYNUMBER:
 485                     anint = va_arg(ap, int);
 486                     retptr = getprotobynumber(anint); break;
 487                 case OP_GPROTOENT:
 488                     retptr = getprotoent(); break;
 489                 default:
 490                     SETERRNO(ERANGE, LIB_INVARG);
 491                     break;
 492                 }
 493             }
 494         }
 495         break;
 496 #endif
 497 #ifdef USE_SERVENT_BUFFER
 498     case OP_GSBYNAME:
 499     case OP_GSBYPORT:
 500     case OP_GSERVENT:
 501         {
 502 #ifdef PERL_REENTRANT_MAXSIZE
 503             if (PL_reentrant_buffer->_servent_size <=
 504                 PERL_REENTRANT_MAXSIZE / 2)
 505 #endif
 506             {
 507                 PL_reentrant_buffer->_servent_size *= 2;
 508                 Renew(PL_reentrant_buffer->_servent_buffer,
 509                       PL_reentrant_buffer->_servent_size, char);
 510                 switch (PL_op->op_type) {
 511                 case OP_GSBYNAME:
 512                     p0 = va_arg(ap, void *);
 513                     p1 = va_arg(ap, void *);
 514                     retptr = getservbyname((char *)p0, (char *)p1); break;
 515                 case OP_GSBYPORT:
 516                     anint = va_arg(ap, int);
 517                     p0 = va_arg(ap, void *);
 518                     retptr = getservbyport(anint, (char *)p0); break;
 519                 case OP_GSERVENT:
 520                     retptr = getservent(); break;
 521                 default:
 522                     SETERRNO(ERANGE, LIB_INVARG);
 523                     break;
 524                 }
 525             }
 526         }
 527         break;
 528 #endif
 529     default:
 530         /* Not known how to retry, so just fail. */
 531         break;
 532     }
 533 #else
 534     PERL_UNUSED_ARG(f);
 535 #endif
 536     va_end(ap);
 537     return retptr;
 538 }
 539
 540 /* ex: set ro: */