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_STRERROR_R
 131         PL_reentrant_buffer->_strerror_size = REENTRANTSMALLSIZE;
 132 #endif /* HAS_STRERROR_R */
 133 #ifdef HAS_TTYNAME_R
 134         PL_reentrant_buffer->_ttyname_size = REENTRANTSMALLSIZE;
 135 #endif /* HAS_TTYNAME_R */
 136
 137 #endif /* USE_REENTRANT_API */
 138 }
 139
 140 void
 141 Perl_reentrant_init(pTHX) {
 142 #ifdef USE_REENTRANT_API
 143         New(31337, PL_reentrant_buffer, 1, REENTR);
 144         Perl_reentrant_size(aTHX);
 145 #ifdef HAS_ASCTIME_R
 146         New(31338, PL_reentrant_buffer->_asctime_buffer, PL_reentrant_buffer->_asctime_size, char);
 147 #endif /* HAS_ASCTIME_R */
 148 #ifdef HAS_CRYPT_R
 149 #if CRYPT_R_PROTO != REENTRANT_PROTO_B_CCD
 150         PL_reentrant_buffer->_crypt_struct_buffer = 0;
 151 #endif
 152 #endif /* HAS_CRYPT_R */
 153 #ifdef HAS_CTIME_R
 154         New(31338, PL_reentrant_buffer->_ctime_buffer, PL_reentrant_buffer->_ctime_size, char);
 155 #endif /* HAS_CTIME_R */
 156 #ifdef HAS_DRAND48_R
 157 #endif /* HAS_DRAND48_R */
 158 #ifdef HAS_GETGRNAM_R
 159 #   ifdef USE_GRENT_FPTR
 160         PL_reentrant_buffer->_grent_fptr = NULL;
 161 #   endif
 162         New(31338, 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         New(31338, PL_reentrant_buffer->_hostent_buffer, PL_reentrant_buffer->_hostent_size, char);
 167 #endif
 168 #endif /* HAS_GETHOSTBYNAME_R */
 169 #ifdef HAS_GETLOGIN_R
 170         New(31338, 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         New(31338, 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         New(31338, 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         New(31338, 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         New(31338, 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         New(31338, PL_reentrant_buffer->_spent_buffer, PL_reentrant_buffer->_spent_size, char);
 198 #endif /* HAS_GETSPNAM_R */
 199 #ifdef HAS_GMTIME_R
 200 #endif /* HAS_GMTIME_R */
 201 #ifdef HAS_LOCALTIME_R
 202 #endif /* HAS_LOCALTIME_R */
 203 #ifdef HAS_RANDOM_R
 204 #endif /* HAS_RANDOM_R */
 205 #ifdef HAS_READDIR_R
 206         PL_reentrant_buffer->_readdir_struct = (struct dirent*)safemalloc(PL_reentrant_buffer->_readdir_size);
 207 #endif /* HAS_READDIR_R */
 208 #ifdef HAS_READDIR64_R
 209         PL_reentrant_buffer->_readdir64_struct = (struct dirent64*)safemalloc(PL_reentrant_buffer->_readdir64_size);
 210 #endif /* HAS_READDIR64_R */
 211 #ifdef HAS_SETLOCALE_R
 212         New(31338, PL_reentrant_buffer->_setlocale_buffer, PL_reentrant_buffer->_setlocale_size, char);
 213 #endif /* HAS_SETLOCALE_R */
 214 #ifdef HAS_STRERROR_R
 215         New(31338, PL_reentrant_buffer->_strerror_buffer, PL_reentrant_buffer->_strerror_size, char);
 216 #endif /* HAS_STRERROR_R */
 217 #ifdef HAS_TTYNAME_R
 218         New(31338, PL_reentrant_buffer->_ttyname_buffer, PL_reentrant_buffer->_ttyname_size, char);
 219 #endif /* HAS_TTYNAME_R */
 220
 221 #endif /* USE_REENTRANT_API */
 222 }
 223
 224 void
 225 Perl_reentrant_free(pTHX) {
 226 #ifdef USE_REENTRANT_API
 227 #ifdef HAS_ASCTIME_R
 228         Safefree(PL_reentrant_buffer->_asctime_buffer);
 229 #endif /* HAS_ASCTIME_R */
 230 #ifdef HAS_CRYPT_R
 231 #if CRYPT_R_PROTO != REENTRANT_PROTO_B_CCD
 232         Safefree(PL_reentrant_buffer->_crypt_struct_buffer);
 233 #endif
 234 #endif /* HAS_CRYPT_R */
 235 #ifdef HAS_CTIME_R
 236         Safefree(PL_reentrant_buffer->_ctime_buffer);
 237 #endif /* HAS_CTIME_R */
 238 #ifdef HAS_DRAND48_R
 239 #endif /* HAS_DRAND48_R */
 240 #ifdef HAS_GETGRNAM_R
 241         Safefree(PL_reentrant_buffer->_grent_buffer);
 242 #endif /* HAS_GETGRNAM_R */
 243 #ifdef HAS_GETHOSTBYNAME_R
 244 #if   !(GETHOSTBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
 245         Safefree(PL_reentrant_buffer->_hostent_buffer);
 246 #endif
 247 #endif /* HAS_GETHOSTBYNAME_R */
 248 #ifdef HAS_GETLOGIN_R
 249         Safefree(PL_reentrant_buffer->_getlogin_buffer);
 250 #endif /* HAS_GETLOGIN_R */
 251 #ifdef HAS_GETNETBYNAME_R
 252 #if   !(GETNETBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
 253         Safefree(PL_reentrant_buffer->_netent_buffer);
 254 #endif
 255 #endif /* HAS_GETNETBYNAME_R */
 256 #ifdef HAS_GETPROTOBYNAME_R
 257 #if   !(GETPROTOBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
 258         Safefree(PL_reentrant_buffer->_protoent_buffer);
 259 #endif
 260 #endif /* HAS_GETPROTOBYNAME_R */
 261 #ifdef HAS_GETPWNAM_R
 262         Safefree(PL_reentrant_buffer->_pwent_buffer);
 263 #endif /* HAS_GETPWNAM_R */
 264 #ifdef HAS_GETSERVBYNAME_R
 265 #if   !(GETSERVBYNAME_R_PROTO == REENTRANT_PROTO_I_CCSD)
 266         Safefree(PL_reentrant_buffer->_servent_buffer);
 267 #endif
 268 #endif /* HAS_GETSERVBYNAME_R */
 269 #ifdef HAS_GETSPNAM_R
 270         Safefree(PL_reentrant_buffer->_spent_buffer);
 271 #endif /* HAS_GETSPNAM_R */
 272 #ifdef HAS_GMTIME_R
 273 #endif /* HAS_GMTIME_R */
 274 #ifdef HAS_LOCALTIME_R
 275 #endif /* HAS_LOCALTIME_R */
 276 #ifdef HAS_RANDOM_R
 277 #endif /* HAS_RANDOM_R */
 278 #ifdef HAS_READDIR_R
 279         Safefree(PL_reentrant_buffer->_readdir_struct);
 280 #endif /* HAS_READDIR_R */
 281 #ifdef HAS_READDIR64_R
 282         Safefree(PL_reentrant_buffer->_readdir64_struct);
 283 #endif /* HAS_READDIR64_R */
 284 #ifdef HAS_SETLOCALE_R
 285         Safefree(PL_reentrant_buffer->_setlocale_buffer);
 286 #endif /* HAS_SETLOCALE_R */
 287 #ifdef HAS_STRERROR_R
 288         Safefree(PL_reentrant_buffer->_strerror_buffer);
 289 #endif /* HAS_STRERROR_R */
 290 #ifdef HAS_TTYNAME_R
 291         Safefree(PL_reentrant_buffer->_ttyname_buffer);
 292 #endif /* HAS_TTYNAME_R */
 293
 294         Safefree(PL_reentrant_buffer);
 295 #endif /* USE_REENTRANT_API */
 296 }
 297
 298 void*
 299 Perl_reentrant_retry(const char *f, ...)
 300 {
 301     dTHX;
 302     void *retptr = NULL;
 303 #ifdef USE_REENTRANT_API
 304 #  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)
 305     void *p0;
 306 #  endif
 307 #  if defined(USE_SERVENT_BUFFER)
 308     void *p1;
 309 #  endif
 310 #  if defined(USE_HOSTENT_BUFFER)
 311     size_t asize;
 312 #  endif
 313 #  if defined(USE_HOSTENT_BUFFER) || defined(USE_NETENT_BUFFER) || defined(USE_PROTOENT_BUFFER) || defined(USE_SERVENT_BUFFER)
 314     int anint;
 315 #  endif
 316     va_list ap;
 317
 318     va_start(ap, f);
 319
 320     switch (PL_op->op_type) {
 321 #ifdef USE_HOSTENT_BUFFER
 322     case OP_GHBYADDR:
 323     case OP_GHBYNAME:
 324     case OP_GHOSTENT:
 325         {
 326 #ifdef PERL_REENTRANT_MAXSIZE
 327             if (PL_reentrant_buffer->_hostent_size <=
 328                 PERL_REENTRANT_MAXSIZE / 2)
 329 #endif
 330             {
 331                 PL_reentrant_buffer->_hostent_size *= 2;
 332                 Renew(PL_reentrant_buffer->_hostent_buffer,
 333                       PL_reentrant_buffer->_hostent_size, char);
 334                 switch (PL_op->op_type) {
 335                 case OP_GHBYADDR:
 336                     p0    = va_arg(ap, void *);
 337                     asize = va_arg(ap, size_t);
 338                     anint  = va_arg(ap, int);
 339                     retptr = gethostbyaddr(p0, asize, anint); break;
 340                 case OP_GHBYNAME:
 341                     p0 = va_arg(ap, void *);
 342                     retptr = gethostbyname(p0); break;
 343                 case OP_GHOSTENT:
 344                     retptr = gethostent(); break;
 345                 default:
 346                     SETERRNO(ERANGE, LIB_INVARG);
 347                     break;
 348                 }
 349             }
 350         }
 351         break;
 352 #endif
 353 #ifdef USE_GRENT_BUFFER
 354     case OP_GGRNAM:
 355     case OP_GGRGID:
 356     case OP_GGRENT:
 357         {
 358 #ifdef PERL_REENTRANT_MAXSIZE
 359             if (PL_reentrant_buffer->_grent_size <=
 360                 PERL_REENTRANT_MAXSIZE / 2)
 361 #endif
 362             {
 363                 Gid_t gid;
 364                 PL_reentrant_buffer->_grent_size *= 2;
 365                 Renew(PL_reentrant_buffer->_grent_buffer,
 366                       PL_reentrant_buffer->_grent_size, char);
 367                 switch (PL_op->op_type) {
 368                 case OP_GGRNAM:
 369                     p0 = va_arg(ap, void *);
 370                     retptr = getgrnam(p0); break;
 371                 case OP_GGRGID:
 372 #if Gid_t_size < INTSIZE
 373                     gid = (Gid_t)va_arg(ap, int);
 374 #else
 375                     gid = va_arg(ap, Gid_t);
 376 #endif
 377                     retptr = getgrgid(gid); break;
 378                 case OP_GGRENT:
 379                     retptr = getgrent(); break;
 380                 default:
 381                     SETERRNO(ERANGE, LIB_INVARG);
 382                     break;
 383                 }
 384             }
 385         }
 386         break;
 387 #endif
 388 #ifdef USE_NETENT_BUFFER
 389     case OP_GNBYADDR:
 390     case OP_GNBYNAME:
 391     case OP_GNETENT:
 392         {
 393 #ifdef PERL_REENTRANT_MAXSIZE
 394             if (PL_reentrant_buffer->_netent_size <=
 395                 PERL_REENTRANT_MAXSIZE / 2)
 396 #endif
 397             {
 398                 Netdb_net_t net;
 399                 PL_reentrant_buffer->_netent_size *= 2;
 400                 Renew(PL_reentrant_buffer->_netent_buffer,
 401                       PL_reentrant_buffer->_netent_size, char);
 402                 switch (PL_op->op_type) {
 403                 case OP_GNBYADDR:
 404                     net = va_arg(ap, Netdb_net_t);
 405                     anint = va_arg(ap, int);
 406                     retptr = getnetbyaddr(net, anint); break;
 407                 case OP_GNBYNAME:
 408                     p0 = va_arg(ap, void *);
 409                     retptr = getnetbyname(p0); break;
 410                 case OP_GNETENT:
 411                     retptr = getnetent(); break;
 412                 default:
 413                     SETERRNO(ERANGE, LIB_INVARG);
 414                     break;
 415                 }
 416             }
 417         }
 418         break;
 419 #endif
 420 #ifdef USE_PWENT_BUFFER
 421     case OP_GPWNAM:
 422     case OP_GPWUID:
 423     case OP_GPWENT:
 424         {
 425 #ifdef PERL_REENTRANT_MAXSIZE
 426             if (PL_reentrant_buffer->_pwent_size <=
 427                 PERL_REENTRANT_MAXSIZE / 2)
 428 #endif
 429             {
 430                 Uid_t uid;
 431                 PL_reentrant_buffer->_pwent_size *= 2;
 432                 Renew(PL_reentrant_buffer->_pwent_buffer,
 433                       PL_reentrant_buffer->_pwent_size, char);
 434                 switch (PL_op->op_type) {
 435                 case OP_GPWNAM:
 436                     p0 = va_arg(ap, void *);
 437                     retptr = getpwnam(p0); break;
 438                 case OP_GPWUID:
 439 #if Uid_t_size < INTSIZE
 440                     uid = (Uid_t)va_arg(ap, int);
 441 #else
 442                     uid = va_arg(ap, Uid_t);
 443 #endif
 444                     retptr = getpwuid(uid); break;
 445                 case OP_GPWENT:
 446                     retptr = getpwent(); break;
 447                 default:
 448                     SETERRNO(ERANGE, LIB_INVARG);
 449                     break;
 450                 }
 451             }
 452         }
 453         break;
 454 #endif
 455 #ifdef USE_PROTOENT_BUFFER
 456     case OP_GPBYNAME:
 457     case OP_GPBYNUMBER:
 458     case OP_GPROTOENT:
 459         {
 460 #ifdef PERL_REENTRANT_MAXSIZE
 461             if (PL_reentrant_buffer->_protoent_size <=
 462                 PERL_REENTRANT_MAXSIZE / 2)
 463 #endif
 464             {
 465                 PL_reentrant_buffer->_protoent_size *= 2;
 466                 Renew(PL_reentrant_buffer->_protoent_buffer,
 467                       PL_reentrant_buffer->_protoent_size, char);
 468                 switch (PL_op->op_type) {
 469                 case OP_GPBYNAME:
 470                     p0 = va_arg(ap, void *);
 471                     retptr = getprotobyname(p0); break;
 472                 case OP_GPBYNUMBER:
 473                     anint = va_arg(ap, int);
 474                     retptr = getprotobynumber(anint); break;
 475                 case OP_GPROTOENT:
 476                     retptr = getprotoent(); break;
 477                 default:
 478                     SETERRNO(ERANGE, LIB_INVARG);
 479                     break;
 480                 }
 481             }
 482         }
 483         break;
 484 #endif
 485 #ifdef USE_SERVENT_BUFFER
 486     case OP_GSBYNAME:
 487     case OP_GSBYPORT:
 488     case OP_GSERVENT:
 489         {
 490 #ifdef PERL_REENTRANT_MAXSIZE
 491             if (PL_reentrant_buffer->_servent_size <=
 492                 PERL_REENTRANT_MAXSIZE / 2)
 493 #endif
 494             {
 495                 PL_reentrant_buffer->_servent_size *= 2;
 496                 Renew(PL_reentrant_buffer->_servent_buffer,
 497                       PL_reentrant_buffer->_servent_size, char);
 498                 switch (PL_op->op_type) {
 499                 case OP_GSBYNAME:
 500                     p0 = va_arg(ap, void *);
 501                     p1 = va_arg(ap, void *);
 502                     retptr = getservbyname(p0, p1); break;
 503                 case OP_GSBYPORT:
 504                     anint = va_arg(ap, int);
 505                     p0 = va_arg(ap, void *);
 506                     retptr = getservbyport(anint, p0); break;
 507                 case OP_GSERVENT:
 508                     retptr = getservent(); break;
 509                 default:
 510                     SETERRNO(ERANGE, LIB_INVARG);
 511                     break;
 512                 }
 513             }
 514         }
 515         break;
 516 #endif
 517     default:
 518         /* Not known how to retry, so just fail. */
 519         break;
 520     }
 521
 522     va_end(ap);
 523 #endif
 524     return retptr;
 525 }
 526