reentr.c

   1 /*
   2  *    reentr.c
   3  *
   4  *    Copyright (C) 2002, 2003, by Larry Wall and others
   5  *
   6  *    You may distribute under the terms of either the GNU General Public
   7  *    License or the Artistic License, as specified in the README file.
   8  *
   9  *  !!!!!!!   DO NOT EDIT THIS FILE   !!!!!!!
  10  *  This file is built by reentrl.pl from data in reentr.pl.
  11  *
  12  * "Saruman," I said, standing away from him, "only one hand at a time can
  13  *  wield the One, and you know that well, so do not trouble to say we!"
  14  *
  15  */
  16
  17 #include "EXTERN.h"
  18 #define PERL_IN_REENTR_C
  19 #include "perl.h"
  20 #include "reentr.h"
  21
  22 void
  23 Perl_reentrant_size(pTHX) {
  24 #ifdef USE_REENTRANT_API
  25 #define REENTRANTSMALLSIZE       256    /* Make something up. */
  26 #define REENTRANTUSUALSIZE      4096    /* Make something up. */
  27 #ifdef HAS_ASCTIME_R
  28         PL_reentrant_buffer->_asctime_size = REENTRANTSMALLSIZE;
  29 #endif /* HAS_ASCTIME_R */
  30 #ifdef HAS_CRYPT_R
  31 #endif /* HAS_CRYPT_R */
  32 #ifdef HAS_CTIME_R
  33         PL_reentrant_buffer->_ctime_size = REENTRANTSMALLSIZE;
  34 #endif /* HAS_CTIME_R */
  35 #ifdef HAS_DRAND48_R
  36 #endif /* HAS_DRAND48_R */
  37 #ifdef HAS_GETGRNAM_R
  38 #   if defined(HAS_SYSCONF) && defined(_SC_GETGR_R_SIZE_MAX) && !defined(__GLIBC__)
  39         PL_reentrant_buffer->_grent_size = sysconf(_SC_GETGR_R_SIZE_MAX);
  40         if (PL_reentrant_buffer->_grent_size == -1)
  41                 PL_reentrant_buffer->_grent_size = REENTRANTUSUALSIZE;
  42 #   else
  43 #       if defined(__osf__) && defined(__alpha) && defined(SIABUFSIZ)
  44         PL_reentrant_buffer->_grent_size = SIABUFSIZ;
  45 #       else
  46 #           ifdef __sgi
  47         PL_reentrant_buffer->_grent_size = BUFSIZ;
  48 #           else
  49         PL_reentrant_buffer->_grent_size = REENTRANTUSUALSIZE;
  50 #           endif
  51 #       endif
  52 #   endif
  53 #endif /* HAS_GETGRNAM_R */
  54 #ifdef HAS_GETHOSTBYNAME_R
  55 #if   !(GETHOSTBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
  56         PL_reentrant_buffer->_hostent_size = REENTRANTUSUALSIZE;
  57 #endif
  58 #endif /* HAS_GETHOSTBYNAME_R */
  59 #ifdef HAS_GETLOGIN_R
  60         PL_reentrant_buffer->_getlogin_size = REENTRANTSMALLSIZE;
  61 #endif /* HAS_GETLOGIN_R */
  62 #ifdef HAS_GETNETBYNAME_R
  63 #if   !(GETNETBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
  64         PL_reentrant_buffer->_netent_size = REENTRANTUSUALSIZE;
  65 #endif
  66 #endif /* HAS_GETNETBYNAME_R */
  67 #ifdef HAS_GETPROTOBYNAME_R
  68 #if   !(GETPROTOBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
  69         PL_reentrant_buffer->_protoent_size = REENTRANTUSUALSIZE;
  70 #endif
  71 #endif /* HAS_GETPROTOBYNAME_R */
  72 #ifdef HAS_GETPWNAM_R
  73 #   if defined(HAS_SYSCONF) && defined(_SC_GETPW_R_SIZE_MAX) && !defined(__GLIBC__)
  74         PL_reentrant_buffer->_pwent_size = sysconf(_SC_GETPW_R_SIZE_MAX);
  75         if (PL_reentrant_buffer->_pwent_size == -1)
  76                 PL_reentrant_buffer->_pwent_size = REENTRANTUSUALSIZE;
  77 #   else
  78 #       if defined(__osf__) && defined(__alpha) && defined(SIABUFSIZ)
  79         PL_reentrant_buffer->_pwent_size = SIABUFSIZ;
  80 #       else
  81 #           ifdef __sgi
  82         PL_reentrant_buffer->_pwent_size = BUFSIZ;
  83 #           else
  84         PL_reentrant_buffer->_pwent_size = REENTRANTUSUALSIZE;
  85 #           endif
  86 #       endif
  87 #   endif
  88 #endif /* HAS_GETPWNAM_R */
  89 #ifdef HAS_GETSERVBYNAME_R
  90 #if   !(GETSERVBYNAME_R_PROTO == REENTRANT_PROTO_I_CCSD)
  91         PL_reentrant_buffer->_servent_size = REENTRANTUSUALSIZE;
  92 #endif
  93 #endif /* HAS_GETSERVBYNAME_R */
  94 #ifdef HAS_GETSPNAM_R
  95 #   if defined(HAS_SYSCONF) && defined(_SC_GETPW_R_SIZE_MAX) && !defined(__GLIBC__)
  96         PL_reentrant_buffer->_spent_size = sysconf(_SC_GETPW_R_SIZE_MAX);
  97         if (PL_reentrant_buffer->_spent_size == -1)
  98                 PL_reentrant_buffer->_spent_size = REENTRANTUSUALSIZE;
  99 #   else
 100 #       if defined(__osf__) && defined(__alpha) && defined(SIABUFSIZ)
 101         PL_reentrant_buffer->_spent_size = SIABUFSIZ;
 102 #       else
 103 #           ifdef __sgi
 104         PL_reentrant_buffer->_spent_size = BUFSIZ;
 105 #           else
 106         PL_reentrant_buffer->_spent_size = REENTRANTUSUALSIZE;
 107 #           endif
 108 #       endif
 109 #   endif
 110 #endif /* HAS_GETSPNAM_R */
 111 #ifdef HAS_GMTIME_R
 112 #endif /* HAS_GMTIME_R */
 113 #ifdef HAS_LOCALTIME_R
 114 #endif /* HAS_LOCALTIME_R */
 115 #ifdef HAS_RANDOM_R
 116 #endif /* HAS_RANDOM_R */
 117 #ifdef HAS_READDIR_R
 118         /* This is the size Solaris recommends.
 119          * (though we go static, should use pathconf() instead) */
 120         PL_reentrant_buffer->_readdir_size = sizeof(struct dirent) + MAXPATHLEN + 1;
 121 #endif /* HAS_READDIR_R */
 122 #ifdef HAS_READDIR64_R
 123         /* This is the size Solaris recommends.
 124          * (though we go static, should use pathconf() instead) */
 125         PL_reentrant_buffer->_readdir64_size = sizeof(struct dirent64) + MAXPATHLEN + 1;
 126 #endif /* HAS_READDIR64_R */
 127 #ifdef HAS_SETLOCALE_R
 128         PL_reentrant_buffer->_setlocale_size = REENTRANTSMALLSIZE;
 129 #endif /* HAS_SETLOCALE_R */
 130 #ifdef HAS_SRANDOM_R
 131 #endif /* HAS_SRANDOM_R */
 132 #ifdef HAS_STRERROR_R
 133         PL_reentrant_buffer->_strerror_size = REENTRANTSMALLSIZE;
 134 #endif /* HAS_STRERROR_R */
 135 #ifdef HAS_TTYNAME_R
 136         PL_reentrant_buffer->_ttyname_size = REENTRANTSMALLSIZE;
 137 #endif /* HAS_TTYNAME_R */
 138
 139 #endif /* USE_REENTRANT_API */
 140 }
 141
 142 void
 143 Perl_reentrant_init(pTHX) {
 144 #ifdef USE_REENTRANT_API
 145         New(31337, PL_reentrant_buffer, 1, REENTR);
 146         Perl_reentrant_size(aTHX);
 147 #ifdef HAS_ASCTIME_R
 148         New(31338, 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         New(31338, PL_reentrant_buffer->_ctime_buffer, PL_reentrant_buffer->_ctime_size, char);
 157 #endif /* HAS_CTIME_R */
 158 #ifdef HAS_DRAND48_R
 159 #endif /* HAS_DRAND48_R */
 160 #ifdef HAS_GETGRNAM_R
 161 #   ifdef USE_GRENT_FPTR
 162         PL_reentrant_buffer->_grent_fptr = NULL;
 163 #   endif
 164         New(31338, PL_reentrant_buffer->_grent_buffer, PL_reentrant_buffer->_grent_size, char);
 165 #endif /* HAS_GETGRNAM_R */
 166 #ifdef HAS_GETHOSTBYNAME_R
 167 #if   !(GETHOSTBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
 168         New(31338, PL_reentrant_buffer->_hostent_buffer, PL_reentrant_buffer->_hostent_size, char);
 169 #endif
 170 #endif /* HAS_GETHOSTBYNAME_R */
 171 #ifdef HAS_GETLOGIN_R
 172         New(31338, PL_reentrant_buffer->_getlogin_buffer, PL_reentrant_buffer->_getlogin_size, char);
 173 #endif /* HAS_GETLOGIN_R */
 174 #ifdef HAS_GETNETBYNAME_R
 175 #if   !(GETNETBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
 176         New(31338, PL_reentrant_buffer->_netent_buffer, PL_reentrant_buffer->_netent_size, char);
 177 #endif
 178 #endif /* HAS_GETNETBYNAME_R */
 179 #ifdef HAS_GETPROTOBYNAME_R
 180 #if   !(GETPROTOBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
 181         New(31338, PL_reentrant_buffer->_protoent_buffer, PL_reentrant_buffer->_protoent_size, char);
 182 #endif
 183 #endif /* HAS_GETPROTOBYNAME_R */
 184 #ifdef HAS_GETPWNAM_R
 185 #   ifdef USE_PWENT_FPTR
 186         PL_reentrant_buffer->_pwent_fptr = NULL;
 187 #   endif
 188         New(31338, PL_reentrant_buffer->_pwent_buffer, PL_reentrant_buffer->_pwent_size, char);
 189 #endif /* HAS_GETPWNAM_R */
 190 #ifdef HAS_GETSERVBYNAME_R
 191 #if   !(GETSERVBYNAME_R_PROTO == REENTRANT_PROTO_I_CCSD)
 192         New(31338, PL_reentrant_buffer->_servent_buffer, PL_reentrant_buffer->_servent_size, char);
 193 #endif
 194 #endif /* HAS_GETSERVBYNAME_R */
 195 #ifdef HAS_GETSPNAM_R
 196 #   ifdef USE_SPENT_FPTR
 197         PL_reentrant_buffer->_spent_fptr = NULL;
 198 #   endif
 199         New(31338, PL_reentrant_buffer->_spent_buffer, PL_reentrant_buffer->_spent_size, char);
 200 #endif /* HAS_GETSPNAM_R */
 201 #ifdef HAS_GMTIME_R
 202 #endif /* HAS_GMTIME_R */
 203 #ifdef HAS_LOCALTIME_R
 204 #endif /* HAS_LOCALTIME_R */
 205 #ifdef HAS_RANDOM_R
 206 #endif /* HAS_RANDOM_R */
 207 #ifdef HAS_READDIR_R
 208         PL_reentrant_buffer->_readdir_struct = (struct dirent*)safemalloc(PL_reentrant_buffer->_readdir_size);
 209 #endif /* HAS_READDIR_R */
 210 #ifdef HAS_READDIR64_R
 211         PL_reentrant_buffer->_readdir64_struct = (struct dirent64*)safemalloc(PL_reentrant_buffer->_readdir64_size);
 212 #endif /* HAS_READDIR64_R */
 213 #ifdef HAS_SETLOCALE_R
 214         New(31338, PL_reentrant_buffer->_setlocale_buffer, PL_reentrant_buffer->_setlocale_size, char);
 215 #endif /* HAS_SETLOCALE_R */
 216 #ifdef HAS_SRANDOM_R
 217 #endif /* HAS_SRANDOM_R */
 218 #ifdef HAS_STRERROR_R
 219         New(31338, PL_reentrant_buffer->_strerror_buffer, PL_reentrant_buffer->_strerror_size, char);
 220 #endif /* HAS_STRERROR_R */
 221 #ifdef HAS_TTYNAME_R
 222         New(31338, PL_reentrant_buffer->_ttyname_buffer, PL_reentrant_buffer->_ttyname_size, char);
 223 #endif /* HAS_TTYNAME_R */
 224
 225 #endif /* USE_REENTRANT_API */
 226 }
 227
 228 void
 229 Perl_reentrant_free(pTHX) {
 230 #ifdef USE_REENTRANT_API
 231 #ifdef HAS_ASCTIME_R
 232         Safefree(PL_reentrant_buffer->_asctime_buffer);
 233 #endif /* HAS_ASCTIME_R */
 234 #ifdef HAS_CRYPT_R
 235 #if CRYPT_R_PROTO != REENTRANT_PROTO_B_CCD
 236         Safefree(PL_reentrant_buffer->_crypt_struct_buffer);
 237 #endif
 238 #endif /* HAS_CRYPT_R */
 239 #ifdef HAS_CTIME_R
 240         Safefree(PL_reentrant_buffer->_ctime_buffer);
 241 #endif /* HAS_CTIME_R */
 242 #ifdef HAS_DRAND48_R
 243 #endif /* HAS_DRAND48_R */
 244 #ifdef HAS_GETGRNAM_R
 245         Safefree(PL_reentrant_buffer->_grent_buffer);
 246 #endif /* HAS_GETGRNAM_R */
 247 #ifdef HAS_GETHOSTBYNAME_R
 248 #if   !(GETHOSTBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
 249         Safefree(PL_reentrant_buffer->_hostent_buffer);
 250 #endif
 251 #endif /* HAS_GETHOSTBYNAME_R */
 252 #ifdef HAS_GETLOGIN_R
 253         Safefree(PL_reentrant_buffer->_getlogin_buffer);
 254 #endif /* HAS_GETLOGIN_R */
 255 #ifdef HAS_GETNETBYNAME_R
 256 #if   !(GETNETBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
 257         Safefree(PL_reentrant_buffer->_netent_buffer);
 258 #endif
 259 #endif /* HAS_GETNETBYNAME_R */
 260 #ifdef HAS_GETPROTOBYNAME_R
 261 #if   !(GETPROTOBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
 262         Safefree(PL_reentrant_buffer->_protoent_buffer);
 263 #endif
 264 #endif /* HAS_GETPROTOBYNAME_R */
 265 #ifdef HAS_GETPWNAM_R
 266         Safefree(PL_reentrant_buffer->_pwent_buffer);
 267 #endif /* HAS_GETPWNAM_R */
 268 #ifdef HAS_GETSERVBYNAME_R
 269 #if   !(GETSERVBYNAME_R_PROTO == REENTRANT_PROTO_I_CCSD)
 270         Safefree(PL_reentrant_buffer->_servent_buffer);
 271 #endif
 272 #endif /* HAS_GETSERVBYNAME_R */
 273 #ifdef HAS_GETSPNAM_R
 274         Safefree(PL_reentrant_buffer->_spent_buffer);
 275 #endif /* HAS_GETSPNAM_R */
 276 #ifdef HAS_GMTIME_R
 277 #endif /* HAS_GMTIME_R */
 278 #ifdef HAS_LOCALTIME_R
 279 #endif /* HAS_LOCALTIME_R */
 280 #ifdef HAS_RANDOM_R
 281 #endif /* HAS_RANDOM_R */
 282 #ifdef HAS_READDIR_R
 283         Safefree(PL_reentrant_buffer->_readdir_struct);
 284 #endif /* HAS_READDIR_R */
 285 #ifdef HAS_READDIR64_R
 286         Safefree(PL_reentrant_buffer->_readdir64_struct);
 287 #endif /* HAS_READDIR64_R */
 288 #ifdef HAS_SETLOCALE_R
 289         Safefree(PL_reentrant_buffer->_setlocale_buffer);
 290 #endif /* HAS_SETLOCALE_R */
 291 #ifdef HAS_SRANDOM_R
 292 #endif /* HAS_SRANDOM_R */
 293 #ifdef HAS_STRERROR_R
 294         Safefree(PL_reentrant_buffer->_strerror_buffer);
 295 #endif /* HAS_STRERROR_R */
 296 #ifdef HAS_TTYNAME_R
 297         Safefree(PL_reentrant_buffer->_ttyname_buffer);
 298 #endif /* HAS_TTYNAME_R */
 299
 300         Safefree(PL_reentrant_buffer);
 301 #endif /* USE_REENTRANT_API */
 302 }
 303
 304 void*
 305 Perl_reentrant_retry(const char *f, ...)
 306 {
 307     dTHX;
 308     void *retptr = NULL;
 309 #ifdef USE_REENTRANT_API
 310 #  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)
 311     void *p0;
 312 #  endif
 313 #  if defined(USE_SERVENT_BUFFER)
 314     void *p1;
 315 #  endif
 316 #  if defined(USE_HOSTENT_BUFFER)
 317     size_t asize;
 318 #  endif
 319 #  if defined(USE_HOSTENT_BUFFER) || defined(USE_NETENT_BUFFER) || defined(USE_PROTOENT_BUFFER) || defined(USE_SERVENT_BUFFER)
 320     int anint;
 321 #  endif
 322     va_list ap;
 323
 324     va_start(ap, f);
 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(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(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(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(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(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(p0, p1); break;
 509                 case OP_GSBYPORT:
 510                     anint = va_arg(ap, int);
 511                     p0 = va_arg(ap, void *);
 512                     retptr = getservbyport(anint, 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
 528     va_end(ap);
 529 #endif
 530     return retptr;
 531 }
 532