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