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_RANDOM_R
 119 #endif /* HAS_RANDOM_R */
 120 #ifdef HAS_READDIR_R
 121         /* This is the size Solaris recommends.
 122          * (though we go static, should use pathconf() instead) */
 123         PL_reentrant_buffer->_readdir_size = sizeof(struct dirent) + MAXPATHLEN + 1;
 124 #endif /* HAS_READDIR_R */
 125 #ifdef HAS_READDIR64_R
 126         /* This is the size Solaris recommends.
 127          * (though we go static, should use pathconf() instead) */
 128         PL_reentrant_buffer->_readdir64_size = sizeof(struct dirent64) + MAXPATHLEN + 1;
 129 #endif /* HAS_READDIR64_R */
 130 #ifdef HAS_SETLOCALE_R
 131         PL_reentrant_buffer->_setlocale_size = REENTRANTSMALLSIZE;
 132 #endif /* HAS_SETLOCALE_R */
 133 #ifdef HAS_SRANDOM_R
 134 #endif /* HAS_SRANDOM_R */
 135 #ifdef HAS_STRERROR_R
 136         PL_reentrant_buffer->_strerror_size = REENTRANTSMALLSIZE;
 137 #endif /* HAS_STRERROR_R */
 138 #ifdef HAS_TTYNAME_R
 139         PL_reentrant_buffer->_ttyname_size = REENTRANTSMALLSIZE;
 140 #endif /* HAS_TTYNAME_R */
 141
 142 #endif /* USE_REENTRANT_API */
 143 }
 144
 145 void
 146 Perl_reentrant_init(pTHX) {
 147 #ifdef USE_REENTRANT_API
 148         Newx(PL_reentrant_buffer, 1, REENTR);
 149         Perl_reentrant_size(aTHX);
 150 #ifdef HAS_ASCTIME_R
 151         Newx(PL_reentrant_buffer->_asctime_buffer, PL_reentrant_buffer->_asctime_size, char);
 152 #endif /* HAS_ASCTIME_R */
 153 #ifdef HAS_CRYPT_R
 154 #if CRYPT_R_PROTO != REENTRANT_PROTO_B_CCD
 155         PL_reentrant_buffer->_crypt_struct_buffer = 0;
 156 #endif
 157 #endif /* HAS_CRYPT_R */
 158 #ifdef HAS_CTIME_R
 159         Newx(PL_reentrant_buffer->_ctime_buffer, PL_reentrant_buffer->_ctime_size, char);
 160 #endif /* HAS_CTIME_R */
 161 #ifdef HAS_DRAND48_R
 162 #endif /* HAS_DRAND48_R */
 163 #ifdef HAS_GETGRNAM_R
 164 #   ifdef USE_GRENT_FPTR
 165         PL_reentrant_buffer->_grent_fptr = NULL;
 166 #   endif
 167         Newx(PL_reentrant_buffer->_grent_buffer, PL_reentrant_buffer->_grent_size, char);
 168 #endif /* HAS_GETGRNAM_R */
 169 #ifdef HAS_GETHOSTBYNAME_R
 170 #if   !(GETHOSTBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
 171         Newx(PL_reentrant_buffer->_hostent_buffer, PL_reentrant_buffer->_hostent_size, char);
 172 #endif
 173 #endif /* HAS_GETHOSTBYNAME_R */
 174 #ifdef HAS_GETLOGIN_R
 175         Newx(PL_reentrant_buffer->_getlogin_buffer, PL_reentrant_buffer->_getlogin_size, char);
 176 #endif /* HAS_GETLOGIN_R */
 177 #ifdef HAS_GETNETBYNAME_R
 178 #if   !(GETNETBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
 179         Newx(PL_reentrant_buffer->_netent_buffer, PL_reentrant_buffer->_netent_size, char);
 180 #endif
 181 #endif /* HAS_GETNETBYNAME_R */
 182 #ifdef HAS_GETPROTOBYNAME_R
 183 #if   !(GETPROTOBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
 184         Newx(PL_reentrant_buffer->_protoent_buffer, PL_reentrant_buffer->_protoent_size, char);
 185 #endif
 186 #endif /* HAS_GETPROTOBYNAME_R */
 187 #ifdef HAS_GETPWNAM_R
 188 #   ifdef USE_PWENT_FPTR
 189         PL_reentrant_buffer->_pwent_fptr = NULL;
 190 #   endif
 191         Newx(PL_reentrant_buffer->_pwent_buffer, PL_reentrant_buffer->_pwent_size, char);
 192 #endif /* HAS_GETPWNAM_R */
 193 #ifdef HAS_GETSERVBYNAME_R
 194 #if   !(GETSERVBYNAME_R_PROTO == REENTRANT_PROTO_I_CCSD)
 195         Newx(PL_reentrant_buffer->_servent_buffer, PL_reentrant_buffer->_servent_size, char);
 196 #endif
 197 #endif /* HAS_GETSERVBYNAME_R */
 198 #ifdef HAS_GETSPNAM_R
 199 #   ifdef USE_SPENT_FPTR
 200         PL_reentrant_buffer->_spent_fptr = NULL;
 201 #   endif
 202         Newx(PL_reentrant_buffer->_spent_buffer, PL_reentrant_buffer->_spent_size, char);
 203 #endif /* HAS_GETSPNAM_R */
 204 #ifdef HAS_RANDOM_R
 205 #endif /* HAS_RANDOM_R */
 206 #ifdef HAS_READDIR_R
 207         PL_reentrant_buffer->_readdir_struct = (struct dirent*)safemalloc(PL_reentrant_buffer->_readdir_size);
 208 #endif /* HAS_READDIR_R */
 209 #ifdef HAS_READDIR64_R
 210         PL_reentrant_buffer->_readdir64_struct = (struct dirent64*)safemalloc(PL_reentrant_buffer->_readdir64_size);
 211 #endif /* HAS_READDIR64_R */
 212 #ifdef HAS_SETLOCALE_R
 213         Newx(PL_reentrant_buffer->_setlocale_buffer, PL_reentrant_buffer->_setlocale_size, char);
 214 #endif /* HAS_SETLOCALE_R */
 215 #ifdef HAS_SRANDOM_R
 216 #endif /* HAS_SRANDOM_R */
 217 #ifdef HAS_STRERROR_R
 218         Newx(PL_reentrant_buffer->_strerror_buffer, PL_reentrant_buffer->_strerror_size, char);
 219 #endif /* HAS_STRERROR_R */
 220 #ifdef HAS_TTYNAME_R
 221         Newx(PL_reentrant_buffer->_ttyname_buffer, PL_reentrant_buffer->_ttyname_size, char);
 222 #endif /* HAS_TTYNAME_R */
 223
 224 #endif /* USE_REENTRANT_API */
 225 }
 226
 227 void
 228 Perl_reentrant_free(pTHX) {
 229 #ifdef USE_REENTRANT_API
 230 #ifdef HAS_ASCTIME_R
 231         Safefree(PL_reentrant_buffer->_asctime_buffer);
 232 #endif /* HAS_ASCTIME_R */
 233 #ifdef HAS_CRYPT_R
 234 #if CRYPT_R_PROTO != REENTRANT_PROTO_B_CCD
 235         Safefree(PL_reentrant_buffer->_crypt_struct_buffer);
 236 #endif
 237 #endif /* HAS_CRYPT_R */
 238 #ifdef HAS_CTIME_R
 239         Safefree(PL_reentrant_buffer->_ctime_buffer);
 240 #endif /* HAS_CTIME_R */
 241 #ifdef HAS_DRAND48_R
 242 #endif /* HAS_DRAND48_R */
 243 #ifdef HAS_GETGRNAM_R
 244         Safefree(PL_reentrant_buffer->_grent_buffer);
 245 #endif /* HAS_GETGRNAM_R */
 246 #ifdef HAS_GETHOSTBYNAME_R
 247 #if   !(GETHOSTBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
 248         Safefree(PL_reentrant_buffer->_hostent_buffer);
 249 #endif
 250 #endif /* HAS_GETHOSTBYNAME_R */
 251 #ifdef HAS_GETLOGIN_R
 252         Safefree(PL_reentrant_buffer->_getlogin_buffer);
 253 #endif /* HAS_GETLOGIN_R */
 254 #ifdef HAS_GETNETBYNAME_R
 255 #if   !(GETNETBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
 256         Safefree(PL_reentrant_buffer->_netent_buffer);
 257 #endif
 258 #endif /* HAS_GETNETBYNAME_R */
 259 #ifdef HAS_GETPROTOBYNAME_R
 260 #if   !(GETPROTOBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
 261         Safefree(PL_reentrant_buffer->_protoent_buffer);
 262 #endif
 263 #endif /* HAS_GETPROTOBYNAME_R */
 264 #ifdef HAS_GETPWNAM_R
 265         Safefree(PL_reentrant_buffer->_pwent_buffer);
 266 #endif /* HAS_GETPWNAM_R */
 267 #ifdef HAS_GETSERVBYNAME_R
 268 #if   !(GETSERVBYNAME_R_PROTO == REENTRANT_PROTO_I_CCSD)
 269         Safefree(PL_reentrant_buffer->_servent_buffer);
 270 #endif
 271 #endif /* HAS_GETSERVBYNAME_R */
 272 #ifdef HAS_GETSPNAM_R
 273         Safefree(PL_reentrant_buffer->_spent_buffer);
 274 #endif /* HAS_GETSPNAM_R */
 275 #ifdef HAS_RANDOM_R
 276 #endif /* HAS_RANDOM_R */
 277 #ifdef HAS_READDIR_R
 278         Safefree(PL_reentrant_buffer->_readdir_struct);
 279 #endif /* HAS_READDIR_R */
 280 #ifdef HAS_READDIR64_R
 281         Safefree(PL_reentrant_buffer->_readdir64_struct);
 282 #endif /* HAS_READDIR64_R */
 283 #ifdef HAS_SETLOCALE_R
 284         Safefree(PL_reentrant_buffer->_setlocale_buffer);
 285 #endif /* HAS_SETLOCALE_R */
 286 #ifdef HAS_SRANDOM_R
 287 #endif /* HAS_SRANDOM_R */
 288 #ifdef HAS_STRERROR_R
 289         Safefree(PL_reentrant_buffer->_strerror_buffer);
 290 #endif /* HAS_STRERROR_R */
 291 #ifdef HAS_TTYNAME_R
 292         Safefree(PL_reentrant_buffer->_ttyname_buffer);
 293 #endif /* HAS_TTYNAME_R */
 294
 295         Safefree(PL_reentrant_buffer);
 296 #endif /* USE_REENTRANT_API */
 297 }
 298
 299 void*
 300 Perl_reentrant_retry(const char *f, ...)
 301 {
 302     dTHX;
 303     void *retptr = NULL;
 304     va_list ap;
 305 #ifdef USE_REENTRANT_API
 306     /* Easier to special case this here than in embed.pl. (Look at what it
 307        generates for proto.h) */
 308     PERL_ARGS_ASSERT_REENTRANT_RETRY;
 309 #endif
 310     va_start(ap, f);
 311     {
 312 #ifdef USE_REENTRANT_API
 313 #  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)
 314     void *p0;
 315 #  endif
 316 #  if defined(USE_SERVENT_BUFFER)
 317     void *p1;
 318 #  endif
 319 #  if defined(USE_HOSTENT_BUFFER)
 320     size_t asize;
 321 #  endif
 322 #  if defined(USE_HOSTENT_BUFFER) || defined(USE_NETENT_BUFFER) || defined(USE_PROTOENT_BUFFER) || defined(USE_SERVENT_BUFFER)
 323     int anint;
 324 #  endif
 325
 326     switch (PL_op->op_type) {
 327 #ifdef USE_HOSTENT_BUFFER
 328     case OP_GHBYADDR:
 329     case OP_GHBYNAME:
 330     case OP_GHOSTENT:
 331         {
 332 #ifdef PERL_REENTRANT_MAXSIZE
 333             if (PL_reentrant_buffer->_hostent_size <=
 334                 PERL_REENTRANT_MAXSIZE / 2)
 335 #endif
 336             {
 337                 PL_reentrant_buffer->_hostent_size *= 2;
 338                 Renew(PL_reentrant_buffer->_hostent_buffer,
 339                       PL_reentrant_buffer->_hostent_size, char);
 340                 switch (PL_op->op_type) {
 341                 case OP_GHBYADDR:
 342                     p0    = va_arg(ap, void *);
 343                     asize = va_arg(ap, size_t);
 344                     anint  = va_arg(ap, int);
 345                     retptr = gethostbyaddr(p0, asize, anint); break;
 346                 case OP_GHBYNAME:
 347                     p0 = va_arg(ap, void *);
 348                     retptr = gethostbyname((char *)p0); break;
 349                 case OP_GHOSTENT:
 350                     retptr = gethostent(); break;
 351                 default:
 352                     SETERRNO(ERANGE, LIB_INVARG);
 353                     break;
 354                 }
 355             }
 356         }
 357         break;
 358 #endif
 359 #ifdef USE_GRENT_BUFFER
 360     case OP_GGRNAM:
 361     case OP_GGRGID:
 362     case OP_GGRENT:
 363         {
 364 #ifdef PERL_REENTRANT_MAXSIZE
 365             if (PL_reentrant_buffer->_grent_size <=
 366                 PERL_REENTRANT_MAXSIZE / 2)
 367 #endif
 368             {
 369                 Gid_t gid;
 370                 PL_reentrant_buffer->_grent_size *= 2;
 371                 Renew(PL_reentrant_buffer->_grent_buffer,
 372                       PL_reentrant_buffer->_grent_size, char);
 373                 switch (PL_op->op_type) {
 374                 case OP_GGRNAM:
 375                     p0 = va_arg(ap, void *);
 376                     retptr = getgrnam((char *)p0); break;
 377                 case OP_GGRGID:
 378 #if Gid_t_size < INTSIZE
 379                     gid = (Gid_t)va_arg(ap, int);
 380 #else
 381                     gid = va_arg(ap, Gid_t);
 382 #endif
 383                     retptr = getgrgid(gid); break;
 384                 case OP_GGRENT:
 385                     retptr = getgrent(); break;
 386                 default:
 387                     SETERRNO(ERANGE, LIB_INVARG);
 388                     break;
 389                 }
 390             }
 391         }
 392         break;
 393 #endif
 394 #ifdef USE_NETENT_BUFFER
 395     case OP_GNBYADDR:
 396     case OP_GNBYNAME:
 397     case OP_GNETENT:
 398         {
 399 #ifdef PERL_REENTRANT_MAXSIZE
 400             if (PL_reentrant_buffer->_netent_size <=
 401                 PERL_REENTRANT_MAXSIZE / 2)
 402 #endif
 403             {
 404                 Netdb_net_t net;
 405                 PL_reentrant_buffer->_netent_size *= 2;
 406                 Renew(PL_reentrant_buffer->_netent_buffer,
 407                       PL_reentrant_buffer->_netent_size, char);
 408                 switch (PL_op->op_type) {
 409                 case OP_GNBYADDR:
 410                     net = va_arg(ap, Netdb_net_t);
 411                     anint = va_arg(ap, int);
 412                     retptr = getnetbyaddr(net, anint); break;
 413                 case OP_GNBYNAME:
 414                     p0 = va_arg(ap, void *);
 415                     retptr = getnetbyname((char *)p0); break;
 416                 case OP_GNETENT:
 417                     retptr = getnetent(); break;
 418                 default:
 419                     SETERRNO(ERANGE, LIB_INVARG);
 420                     break;
 421                 }
 422             }
 423         }
 424         break;
 425 #endif
 426 #ifdef USE_PWENT_BUFFER
 427     case OP_GPWNAM:
 428     case OP_GPWUID:
 429     case OP_GPWENT:
 430         {
 431 #ifdef PERL_REENTRANT_MAXSIZE
 432             if (PL_reentrant_buffer->_pwent_size <=
 433                 PERL_REENTRANT_MAXSIZE / 2)
 434 #endif
 435             {
 436                 Uid_t uid;
 437                 PL_reentrant_buffer->_pwent_size *= 2;
 438                 Renew(PL_reentrant_buffer->_pwent_buffer,
 439                       PL_reentrant_buffer->_pwent_size, char);
 440                 switch (PL_op->op_type) {
 441                 case OP_GPWNAM:
 442                     p0 = va_arg(ap, void *);
 443                     retptr = getpwnam((char *)p0); break;
 444                 case OP_GPWUID:
 445 #if Uid_t_size < INTSIZE
 446                     uid = (Uid_t)va_arg(ap, int);
 447 #else
 448                     uid = va_arg(ap, Uid_t);
 449 #endif
 450                     retptr = getpwuid(uid); break;
 451                 case OP_GPWENT:
 452                     retptr = getpwent(); break;
 453                 default:
 454                     SETERRNO(ERANGE, LIB_INVARG);
 455                     break;
 456                 }
 457             }
 458         }
 459         break;
 460 #endif
 461 #ifdef USE_PROTOENT_BUFFER
 462     case OP_GPBYNAME:
 463     case OP_GPBYNUMBER:
 464     case OP_GPROTOENT:
 465         {
 466 #ifdef PERL_REENTRANT_MAXSIZE
 467             if (PL_reentrant_buffer->_protoent_size <=
 468                 PERL_REENTRANT_MAXSIZE / 2)
 469 #endif
 470             {
 471                 PL_reentrant_buffer->_protoent_size *= 2;
 472                 Renew(PL_reentrant_buffer->_protoent_buffer,
 473                       PL_reentrant_buffer->_protoent_size, char);
 474                 switch (PL_op->op_type) {
 475                 case OP_GPBYNAME:
 476                     p0 = va_arg(ap, void *);
 477                     retptr = getprotobyname((char *)p0); break;
 478                 case OP_GPBYNUMBER:
 479                     anint = va_arg(ap, int);
 480                     retptr = getprotobynumber(anint); break;
 481                 case OP_GPROTOENT:
 482                     retptr = getprotoent(); break;
 483                 default:
 484                     SETERRNO(ERANGE, LIB_INVARG);
 485                     break;
 486                 }
 487             }
 488         }
 489         break;
 490 #endif
 491 #ifdef USE_SERVENT_BUFFER
 492     case OP_GSBYNAME:
 493     case OP_GSBYPORT:
 494     case OP_GSERVENT:
 495         {
 496 #ifdef PERL_REENTRANT_MAXSIZE
 497             if (PL_reentrant_buffer->_servent_size <=
 498                 PERL_REENTRANT_MAXSIZE / 2)
 499 #endif
 500             {
 501                 PL_reentrant_buffer->_servent_size *= 2;
 502                 Renew(PL_reentrant_buffer->_servent_buffer,
 503                       PL_reentrant_buffer->_servent_size, char);
 504                 switch (PL_op->op_type) {
 505                 case OP_GSBYNAME:
 506                     p0 = va_arg(ap, void *);
 507                     p1 = va_arg(ap, void *);
 508                     retptr = getservbyname((char *)p0, (char *)p1); break;
 509                 case OP_GSBYPORT:
 510                     anint = va_arg(ap, int);
 511                     p0 = va_arg(ap, void *);
 512                     retptr = getservbyport(anint, (char *)p0); break;
 513                 case OP_GSERVENT:
 514                     retptr = getservent(); break;
 515                 default:
 516                     SETERRNO(ERANGE, LIB_INVARG);
 517                     break;
 518                 }
 519             }
 520         }
 521         break;
 522 #endif
 523     default:
 524         /* Not known how to retry, so just fail. */
 525         break;
 526     }
 527 #else
 528     PERL_UNUSED_ARG(f);
 529 #endif
 530     }
 531     va_end(ap);
 532     return retptr;
 533 }
 534
 535 /* ex: set ro: */