reentr.c

   1 /*
   2  *    reentr.c
   3  *
   4  *    Copyright (c) 1997-2002, Larry Wall
   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->_getgrent_size = sysconf(_SC_GETGR_R_SIZE_MAX);
  40         if (PL_reentrant_buffer->_getgrent_size == -1)
  41                 PL_reentrant_buffer->_getgrent_size = REENTRANTUSUALSIZE;
  42 #   else
  43 #       if defined(__osf__) && defined(__alpha) && defined(SIABUFSIZ)
  44         PL_reentrant_buffer->_getgrent_size = SIABUFSIZ;
  45 #       else
  46 #           ifdef __sgi
  47         PL_reentrant_buffer->_getgrent_size = BUFSIZ;
  48 #           else
  49         PL_reentrant_buffer->_getgrent_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->_gethostent_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->_getnetent_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->_getprotoent_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->_getpwent_size = sysconf(_SC_GETPW_R_SIZE_MAX);
  75         if (PL_reentrant_buffer->_getpwent_size == -1)
  76                 PL_reentrant_buffer->_getpwent_size = REENTRANTUSUALSIZE;
  77 #   else
  78 #       if defined(__osf__) && defined(__alpha) && defined(SIABUFSIZ)
  79         PL_reentrant_buffer->_getpwent_size = SIABUFSIZ;
  80 #       else
  81 #           ifdef __sgi
  82         PL_reentrant_buffer->_getpwent_size = BUFSIZ;
  83 #           else
  84         PL_reentrant_buffer->_getpwent_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->_getservent_size = REENTRANTUSUALSIZE;
  92 #endif
  93 #endif /* HAS_GETSERVBYNAME_R */
  94 #ifdef HAS_GETSPNAM_R
  95         PL_reentrant_buffer->_getspent_size = 1024;
  96 #endif /* HAS_GETSPNAM_R */
  97 #ifdef HAS_GMTIME_R
  98 #endif /* HAS_GMTIME_R */
  99 #ifdef HAS_LOCALTIME_R
 100 #endif /* HAS_LOCALTIME_R */
 101 #ifdef HAS_RANDOM_R
 102 #endif /* HAS_RANDOM_R */
 103 #ifdef HAS_READDIR_R
 104         /* This is the size Solaris recommends.
 105          * (though we go static, should use pathconf() instead) */
 106         PL_reentrant_buffer->_readdir_size = sizeof(struct dirent) + MAXPATHLEN + 1;
 107 #endif /* HAS_READDIR_R */
 108 #ifdef HAS_READDIR64_R
 109         /* This is the size Solaris recommends.
 110          * (though we go static, should use pathconf() instead) */
 111         PL_reentrant_buffer->_readdir64_size = sizeof(struct dirent64) + MAXPATHLEN + 1;
 112 #endif /* HAS_READDIR64_R */
 113 #ifdef HAS_SETLOCALE_R
 114         PL_reentrant_buffer->_setlocale_size = REENTRANTSMALLSIZE;
 115 #endif /* HAS_SETLOCALE_R */
 116 #ifdef HAS_STRERROR_R
 117         PL_reentrant_buffer->_strerror_size = REENTRANTSMALLSIZE;
 118 #endif /* HAS_STRERROR_R */
 119 #ifdef HAS_TTYNAME_R
 120         PL_reentrant_buffer->_ttyname_size = REENTRANTSMALLSIZE;
 121 #endif /* HAS_TTYNAME_R */
 122
 123 #endif /* USE_REENTRANT_API */
 124 }
 125
 126 void
 127 Perl_reentrant_init(pTHX) {
 128 #ifdef USE_REENTRANT_API
 129         New(31337, PL_reentrant_buffer, 1, REENTR);
 130         Perl_reentrant_size(aTHX);
 131 #ifdef HAS_ASCTIME_R
 132         New(31338, PL_reentrant_buffer->_asctime_buffer, PL_reentrant_buffer->_asctime_size, char);
 133 #endif /* HAS_ASCTIME_R */
 134 #ifdef HAS_CRYPT_R
 135 #ifdef __GLIBC__
 136         PL_reentrant_buffer->_crypt_struct.initialized = 0;
 137 #endif
 138 #endif /* HAS_CRYPT_R */
 139 #ifdef HAS_CTIME_R
 140         New(31338, PL_reentrant_buffer->_ctime_buffer, PL_reentrant_buffer->_ctime_size, char);
 141 #endif /* HAS_CTIME_R */
 142 #ifdef HAS_DRAND48_R
 143 #endif /* HAS_DRAND48_R */
 144 #ifdef HAS_GETGRNAM_R
 145 #   ifdef USE_GETGRENT_FPTR
 146         PL_reentrant_buffer->_getgrent_fptr = NULL;
 147 #   endif
 148         New(31338, PL_reentrant_buffer->_getgrent_buffer, PL_reentrant_buffer->_getgrent_size, char);
 149 #endif /* HAS_GETGRNAM_R */
 150 #ifdef HAS_GETHOSTBYNAME_R
 151 #if   !(GETHOSTBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
 152         New(31338, PL_reentrant_buffer->_gethostent_buffer, PL_reentrant_buffer->_gethostent_size, char);
 153 #endif
 154 #endif /* HAS_GETHOSTBYNAME_R */
 155 #ifdef HAS_GETLOGIN_R
 156         New(31338, PL_reentrant_buffer->_getlogin_buffer, PL_reentrant_buffer->_getlogin_size, char);
 157 #endif /* HAS_GETLOGIN_R */
 158 #ifdef HAS_GETNETBYNAME_R
 159 #if   !(GETNETBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
 160         New(31338, PL_reentrant_buffer->_getnetent_buffer, PL_reentrant_buffer->_getnetent_size, char);
 161 #endif
 162 #endif /* HAS_GETNETBYNAME_R */
 163 #ifdef HAS_GETPROTOBYNAME_R
 164 #if   !(GETPROTOBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
 165         New(31338, PL_reentrant_buffer->_getprotoent_buffer, PL_reentrant_buffer->_getprotoent_size, char);
 166 #endif
 167 #endif /* HAS_GETPROTOBYNAME_R */
 168 #ifdef HAS_GETPWNAM_R
 169 #   ifdef USE_GETPWENT_FPTR
 170         PL_reentrant_buffer->_getpwent_fptr = NULL;
 171 #   endif
 172         New(31338, PL_reentrant_buffer->_getpwent_buffer, PL_reentrant_buffer->_getpwent_size, char);
 173 #endif /* HAS_GETPWNAM_R */
 174 #ifdef HAS_GETSERVBYNAME_R
 175 #if   !(GETSERVBYNAME_R_PROTO == REENTRANT_PROTO_I_CCSD)
 176         New(31338, PL_reentrant_buffer->_getservent_buffer, PL_reentrant_buffer->_getservent_size, char);
 177 #endif
 178 #endif /* HAS_GETSERVBYNAME_R */
 179 #ifdef HAS_GETSPNAM_R
 180         New(31338, PL_reentrant_buffer->_getspent_buffer, PL_reentrant_buffer->_getspent_size, char);
 181 #endif /* HAS_GETSPNAM_R */
 182 #ifdef HAS_GMTIME_R
 183 #endif /* HAS_GMTIME_R */
 184 #ifdef HAS_LOCALTIME_R
 185 #endif /* HAS_LOCALTIME_R */
 186 #ifdef HAS_RANDOM_R
 187 #endif /* HAS_RANDOM_R */
 188 #ifdef HAS_READDIR_R
 189         PL_reentrant_buffer->_readdir_struct = (struct dirent*)safemalloc(PL_reentrant_buffer->_readdir_size);
 190 #endif /* HAS_READDIR_R */
 191 #ifdef HAS_READDIR64_R
 192         PL_reentrant_buffer->_readdir64_struct = (struct dirent64*)safemalloc(PL_reentrant_buffer->_readdir64_size);
 193 #endif /* HAS_READDIR64_R */
 194 #ifdef HAS_SETLOCALE_R
 195         New(31338, PL_reentrant_buffer->_setlocale_buffer, PL_reentrant_buffer->_setlocale_size, char);
 196 #endif /* HAS_SETLOCALE_R */
 197 #ifdef HAS_STRERROR_R
 198         New(31338, PL_reentrant_buffer->_strerror_buffer, PL_reentrant_buffer->_strerror_size, char);
 199 #endif /* HAS_STRERROR_R */
 200 #ifdef HAS_TTYNAME_R
 201         New(31338, PL_reentrant_buffer->_ttyname_buffer, PL_reentrant_buffer->_ttyname_size, char);
 202 #endif /* HAS_TTYNAME_R */
 203
 204 #endif /* USE_REENTRANT_API */
 205 }
 206
 207 void
 208 Perl_reentrant_free(pTHX) {
 209 #ifdef USE_REENTRANT_API
 210 #ifdef HAS_ASCTIME_R
 211         Safefree(PL_reentrant_buffer->_asctime_buffer);
 212 #endif /* HAS_ASCTIME_R */
 213 #ifdef HAS_CRYPT_R
 214 #endif /* HAS_CRYPT_R */
 215 #ifdef HAS_CTIME_R
 216         Safefree(PL_reentrant_buffer->_ctime_buffer);
 217 #endif /* HAS_CTIME_R */
 218 #ifdef HAS_DRAND48_R
 219 #endif /* HAS_DRAND48_R */
 220 #ifdef HAS_GETGRNAM_R
 221         Safefree(PL_reentrant_buffer->_getgrent_buffer);
 222 #endif /* HAS_GETGRNAM_R */
 223 #ifdef HAS_GETHOSTBYNAME_R
 224 #if   !(GETHOSTBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
 225         Safefree(PL_reentrant_buffer->_gethostent_buffer);
 226 #endif
 227 #endif /* HAS_GETHOSTBYNAME_R */
 228 #ifdef HAS_GETLOGIN_R
 229         Safefree(PL_reentrant_buffer->_getlogin_buffer);
 230 #endif /* HAS_GETLOGIN_R */
 231 #ifdef HAS_GETNETBYNAME_R
 232 #if   !(GETNETBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
 233         Safefree(PL_reentrant_buffer->_getnetent_buffer);
 234 #endif
 235 #endif /* HAS_GETNETBYNAME_R */
 236 #ifdef HAS_GETPROTOBYNAME_R
 237 #if   !(GETPROTOBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
 238         Safefree(PL_reentrant_buffer->_getprotoent_buffer);
 239 #endif
 240 #endif /* HAS_GETPROTOBYNAME_R */
 241 #ifdef HAS_GETPWNAM_R
 242         Safefree(PL_reentrant_buffer->_getpwent_buffer);
 243 #endif /* HAS_GETPWNAM_R */
 244 #ifdef HAS_GETSERVBYNAME_R
 245 #if   !(GETSERVBYNAME_R_PROTO == REENTRANT_PROTO_I_CCSD)
 246         Safefree(PL_reentrant_buffer->_getservent_buffer);
 247 #endif
 248 #endif /* HAS_GETSERVBYNAME_R */
 249 #ifdef HAS_GETSPNAM_R
 250         Safefree(PL_reentrant_buffer->_getspent_buffer);
 251 #endif /* HAS_GETSPNAM_R */
 252 #ifdef HAS_GMTIME_R
 253 #endif /* HAS_GMTIME_R */
 254 #ifdef HAS_LOCALTIME_R
 255 #endif /* HAS_LOCALTIME_R */
 256 #ifdef HAS_RANDOM_R
 257 #endif /* HAS_RANDOM_R */
 258 #ifdef HAS_READDIR_R
 259         Safefree(PL_reentrant_buffer->_readdir_struct);
 260 #endif /* HAS_READDIR_R */
 261 #ifdef HAS_READDIR64_R
 262         Safefree(PL_reentrant_buffer->_readdir64_struct);
 263 #endif /* HAS_READDIR64_R */
 264 #ifdef HAS_SETLOCALE_R
 265         Safefree(PL_reentrant_buffer->_setlocale_buffer);
 266 #endif /* HAS_SETLOCALE_R */
 267 #ifdef HAS_STRERROR_R
 268         Safefree(PL_reentrant_buffer->_strerror_buffer);
 269 #endif /* HAS_STRERROR_R */
 270 #ifdef HAS_TTYNAME_R
 271         Safefree(PL_reentrant_buffer->_ttyname_buffer);
 272 #endif /* HAS_TTYNAME_R */
 273
 274         Safefree(PL_reentrant_buffer);
 275 #endif /* USE_REENTRANT_API */
 276 }
 277
 278 void*
 279 Perl_reentrant_retry(const char *f, ...)
 280 {
 281     dTHX;
 282     void *retptr = NULL;
 283 #ifdef USE_REENTRANT_API
 284 #  if defined(USE_GETHOSTENT_BUFFER) || defined(USE_GETGRENT_BUFFER) || defined(USE_GETNETENT_BUFFER) || defined(USE_GETPWENT_BUFFER) || defined(USE_GETPROTOENT_BUFFER) || defined(USE_GETSERVENT_BUFFER)
 285     void *p0;
 286 #  endif
 287 #  if defined(USE_GETSERVENT_BUFFER)
 288     void *p1;
 289 #  endif
 290 #  if defined(USE_GETHOSTENT_BUFFER)
 291     size_t asize;
 292 #  endif
 293 #  if defined(USE_GETHOSTENT_BUFFER) || defined(USE_GETNETENT_BUFFER) || defined(USE_GETPROTOENT_BUFFER) || defined(USE_GETSERVENT_BUFFER)
 294     int anint;
 295 #  endif
 296     va_list ap;
 297
 298     va_start(ap, f);
 299
 300 #define REENTRANTHALFMAXSIZE 32768 /* The maximum may end up twice this. */
 301
 302     switch (PL_op->op_type) {
 303 #ifdef USE_GETHOSTENT_BUFFER
 304     case OP_GHBYADDR:
 305     case OP_GHBYNAME:
 306     case OP_GHOSTENT:
 307         {
 308             if (PL_reentrant_buffer->_gethostent_size <= REENTRANTHALFMAXSIZE) {
 309                 PL_reentrant_buffer->_gethostent_size *= 2;
 310                 Renew(PL_reentrant_buffer->_gethostent_buffer,
 311                       PL_reentrant_buffer->_gethostent_size, char);
 312                 switch (PL_op->op_type) {
 313                 case OP_GHBYADDR:
 314                     p0    = va_arg(ap, void *);
 315                     asize = va_arg(ap, size_t);
 316                     anint  = va_arg(ap, int);
 317                     retptr = gethostbyaddr(p0, asize, anint); break;
 318                 case OP_GHBYNAME:
 319                     p0 = va_arg(ap, void *);
 320                     retptr = gethostbyname(p0); break;
 321                 case OP_GHOSTENT:
 322                     retptr = gethostent(); break;
 323                 default:
 324                     break;
 325                 }
 326             }
 327         }
 328         break;
 329 #endif
 330 #ifdef USE_GETGRENT_BUFFER
 331     case OP_GGRNAM:
 332     case OP_GGRGID:
 333     case OP_GGRENT:
 334         {
 335             if (PL_reentrant_buffer->_getgrent_size <= REENTRANTHALFMAXSIZE) {
 336                 Gid_t gid;
 337                 PL_reentrant_buffer->_getgrent_size *= 2;
 338                 Renew(PL_reentrant_buffer->_getgrent_buffer,
 339                       PL_reentrant_buffer->_getgrent_size, char);
 340                 switch (PL_op->op_type) {
 341                 case OP_GGRNAM:
 342                     p0 = va_arg(ap, void *);
 343                     retptr = getgrnam(p0); break;
 344                 case OP_GGRGID:
 345                     gid = va_arg(ap, Gid_t);
 346                     retptr = getgrgid(gid); break;
 347                 case OP_GGRENT:
 348                     retptr = getgrent(); break;
 349                 default:
 350                     break;
 351                 }
 352             }
 353         }
 354         break;
 355 #endif
 356 #ifdef USE_GETNETENT_BUFFER
 357     case OP_GNBYADDR:
 358     case OP_GNBYNAME:
 359     case OP_GNETENT:
 360         {
 361             if (PL_reentrant_buffer->_getnetent_size <= REENTRANTHALFMAXSIZE) {
 362                 Netdb_net_t net;
 363                 PL_reentrant_buffer->_getnetent_size *= 2;
 364                 Renew(PL_reentrant_buffer->_getnetent_buffer,
 365                       PL_reentrant_buffer->_getnetent_size, char);
 366                 switch (PL_op->op_type) {
 367                 case OP_GNBYADDR:
 368                     net = va_arg(ap, Netdb_net_t);
 369                     anint = va_arg(ap, int);
 370                     retptr = getnetbyaddr(net, anint); break;
 371                 case OP_GNBYNAME:
 372                     p0 = va_arg(ap, void *);
 373                     retptr = getnetbyname(p0); break;
 374                 case OP_GNETENT:
 375                     retptr = getnetent(); break;
 376                 default:
 377                     break;
 378                 }
 379             }
 380         }
 381         break;
 382 #endif
 383 #ifdef USE_GETPWENT_BUFFER
 384     case OP_GPWNAM:
 385     case OP_GPWUID:
 386     case OP_GPWENT:
 387         {
 388             if (PL_reentrant_buffer->_getpwent_size <= REENTRANTHALFMAXSIZE) {
 389                 Uid_t uid;
 390                 PL_reentrant_buffer->_getpwent_size *= 2;
 391                 Renew(PL_reentrant_buffer->_getpwent_buffer,
 392                       PL_reentrant_buffer->_getpwent_size, char);
 393                 switch (PL_op->op_type) {
 394                 case OP_GPWNAM:
 395                     p0 = va_arg(ap, void *);
 396                     retptr = getpwnam(p0); break;
 397                 case OP_GPWUID:
 398                     uid = va_arg(ap, Uid_t);
 399                     retptr = getpwuid(uid); break;
 400                 case OP_GPWENT:
 401                     retptr = getpwent(); break;
 402                 default:
 403                     break;
 404                 }
 405             }
 406         }
 407         break;
 408 #endif
 409 #ifdef USE_GETPROTOENT_BUFFER
 410     case OP_GPBYNAME:
 411     case OP_GPBYNUMBER:
 412     case OP_GPROTOENT:
 413         {
 414             if (PL_reentrant_buffer->_getprotoent_size <= REENTRANTHALFMAXSIZE) {
 415                 PL_reentrant_buffer->_getprotoent_size *= 2;
 416                 Renew(PL_reentrant_buffer->_getprotoent_buffer,
 417                       PL_reentrant_buffer->_getprotoent_size, char);
 418                 switch (PL_op->op_type) {
 419                 case OP_GPBYNAME:
 420                     p0 = va_arg(ap, void *);
 421                     retptr = getprotobyname(p0); break;
 422                 case OP_GPBYNUMBER:
 423                     anint = va_arg(ap, int);
 424                     retptr = getprotobynumber(anint); break;
 425                 case OP_GPROTOENT:
 426                     retptr = getprotoent(); break;
 427                 default:
 428                     break;
 429                 }
 430             }
 431         }
 432         break;
 433 #endif
 434 #ifdef USE_GETSERVENT_BUFFER
 435     case OP_GSBYNAME:
 436     case OP_GSBYPORT:
 437     case OP_GSERVENT:
 438         {
 439             if (PL_reentrant_buffer->_getservent_size <= REENTRANTHALFMAXSIZE) {
 440                 PL_reentrant_buffer->_getservent_size *= 2;
 441                 Renew(PL_reentrant_buffer->_getservent_buffer,
 442                       PL_reentrant_buffer->_getservent_size, char);
 443                 switch (PL_op->op_type) {
 444                 case OP_GSBYNAME:
 445                     p0 = va_arg(ap, void *);
 446                     p1 = va_arg(ap, void *);
 447                     retptr = getservbyname(p0, p1); break;
 448                 case OP_GSBYPORT:
 449                     anint = va_arg(ap, int);
 450                     p0 = va_arg(ap, void *);
 451                     retptr = getservbyport(anint, p0); break;
 452                 case OP_GSERVENT:
 453                     retptr = getservent(); break;
 454                 default:
 455                     break;
 456                 }
 457             }
 458         }
 459         break;
 460 #endif
 461     default:
 462         /* Not known how to retry, so just fail. */
 463         break;
 464     }
 465
 466     va_end(ap);
 467 #endif
 468     return retptr;
 469 }
 470