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->_getgrent_size == -1)
  76                 PL_reentrant_buffer->_getgrent_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     void *p0, *p1;
 285     size_t asize;
 286     int anint;
 287     va_list ap;
 288
 289     va_start(ap, f);
 290
 291 #define REENTRANTHALFMAXSIZE 32768 /* The maximum may end up twice this. */
 292
 293     switch (PL_op->op_type) {
 294 #ifdef USE_GETHOSTENT_BUFFER
 295     case OP_GHBYADDR:
 296     case OP_GHBYNAME:
 297     case OP_GHOSTENT:
 298         {
 299             if (PL_reentrant_buffer->_gethostent_size <= REENTRANTHALFMAXSIZE) {
 300                 PL_reentrant_buffer->_gethostent_size *= 2;
 301                 Renew(PL_reentrant_buffer->_gethostent_buffer,
 302                       PL_reentrant_buffer->_gethostent_size, char);
 303                 switch (PL_op->op_type) {
 304                 case OP_GHBYADDR:
 305                     p0    = va_arg(ap, void *);
 306                     asize = va_arg(ap, size_t);
 307                     anint  = va_arg(ap, int);
 308                     retptr = gethostbyaddr(p0, asize, anint); break;
 309                 case OP_GHBYNAME:
 310                     p0 = va_arg(ap, void *);
 311                     retptr = gethostbyname(p0); break;
 312                 case OP_GHOSTENT:
 313                     retptr = gethostent(); break;
 314                 default:
 315                     break;
 316                 }
 317             }
 318         }
 319         break;
 320 #endif
 321 #ifdef USE_GETGRENT_BUFFER
 322     case OP_GGRNAM:
 323     case OP_GGRGID:
 324     case OP_GGRENT:
 325         {
 326             if (PL_reentrant_buffer->_getgrent_size <= REENTRANTHALFMAXSIZE) {
 327                 Gid_t gid;
 328                 PL_reentrant_buffer->_getgrent_size *= 2;
 329                 Renew(PL_reentrant_buffer->_getgrent_buffer,
 330                       PL_reentrant_buffer->_getgrent_size, char);
 331                 switch (PL_op->op_type) {
 332                 case OP_GGRNAM:
 333                     p0 = va_arg(ap, void *);
 334                     retptr = getgrnam(p0); break;
 335                 case OP_GGRGID:
 336                     gid = va_arg(ap, Gid_t);
 337                     retptr = getgrgid(gid); break;
 338                 case OP_GGRENT:
 339                     retptr = getgrent(); break;
 340                 default:
 341                     break;
 342                 }
 343             }
 344         }
 345         break;
 346 #endif
 347 #ifdef USE_GETNETENT_BUFFER
 348     case OP_GNBYADDR:
 349     case OP_GNBYNAME:
 350     case OP_GNETENT:
 351         {
 352             if (PL_reentrant_buffer->_getnetent_size <= REENTRANTHALFMAXSIZE) {
 353                 Netdb_net_t net;
 354                 PL_reentrant_buffer->_getnetent_size *= 2;
 355                 Renew(PL_reentrant_buffer->_getnetent_buffer,
 356                       PL_reentrant_buffer->_getnetent_size, char);
 357                 switch (PL_op->op_type) {
 358                 case OP_GNBYADDR:
 359                     net = va_arg(ap, Netdb_net_t);
 360                     anint = va_arg(ap, int);
 361                     retptr = getnetbyaddr(net, anint); break;
 362                 case OP_GNBYNAME:
 363                     p0 = va_arg(ap, void *);
 364                     retptr = getnetbyname(p0); break;
 365                 case OP_GNETENT:
 366                     retptr = getnetent(); break;
 367                 default:
 368                     break;
 369                 }
 370             }
 371         }
 372         break;
 373 #endif
 374 #ifdef USE_GETPWENT_BUFFER
 375     case OP_GPWNAM:
 376     case OP_GPWUID:
 377     case OP_GPWENT:
 378         {
 379             if (PL_reentrant_buffer->_getpwent_size <= REENTRANTHALFMAXSIZE) {
 380                 Uid_t uid;
 381                 PL_reentrant_buffer->_getpwent_size *= 2;
 382                 Renew(PL_reentrant_buffer->_getpwent_buffer,
 383                       PL_reentrant_buffer->_getpwent_size, char);
 384                 switch (PL_op->op_type) {
 385                 case OP_GPWNAM:
 386                     p0 = va_arg(ap, void *);
 387                     retptr = getpwnam(p0); break;
 388                 case OP_GPWUID:
 389                     uid = va_arg(ap, Uid_t);
 390                     retptr = getpwuid(uid); break;
 391                 case OP_GPWENT:
 392                     retptr = getpwent(); break;
 393                 default:
 394                     break;
 395                 }
 396             }
 397         }
 398         break;
 399 #endif
 400 #ifdef USE_GETPROTOENT_BUFFER
 401     case OP_GPBYNAME:
 402     case OP_GPBYNUMBER:
 403     case OP_GPROTOENT:
 404         {
 405             if (PL_reentrant_buffer->_getprotoent_size <= REENTRANTHALFMAXSIZE) {
 406                 PL_reentrant_buffer->_getprotoent_size *= 2;
 407                 Renew(PL_reentrant_buffer->_getprotoent_buffer,
 408                       PL_reentrant_buffer->_getprotoent_size, char);
 409                 switch (PL_op->op_type) {
 410                 case OP_GPBYNAME:
 411                     p0 = va_arg(ap, void *);
 412                     retptr = getprotobyname(p0); break;
 413                 case OP_GPBYNUMBER:
 414                     anint = va_arg(ap, int);
 415                     retptr = getprotobynumber(anint); break;
 416                 case OP_GPROTOENT:
 417                     retptr = getprotoent(); break;
 418                 default:
 419                     break;
 420                 }
 421             }
 422         }
 423         break;
 424 #endif
 425 #ifdef USE_GETSERVENT_BUFFER
 426     case OP_GSBYNAME:
 427     case OP_GSBYPORT:
 428     case OP_GSERVENT:
 429         {
 430             if (PL_reentrant_buffer->_getservent_size <= REENTRANTHALFMAXSIZE) {
 431                 PL_reentrant_buffer->_getservent_size *= 2;
 432                 Renew(PL_reentrant_buffer->_getservent_buffer,
 433                       PL_reentrant_buffer->_getservent_size, char);
 434                 switch (PL_op->op_type) {
 435                 case OP_GSBYNAME:
 436                     p0 = va_arg(ap, void *);
 437                     p1 = va_arg(ap, void *);
 438                     retptr = getservbyname(p0, p1); break;
 439                 case OP_GSBYPORT:
 440                     anint = va_arg(ap, int);
 441                     p0 = va_arg(ap, void *);
 442                     retptr = getservbyport(anint, p0); break;
 443                 case OP_GSERVENT:
 444                     retptr = getservent(); break;
 445                 default:
 446                     break;
 447                 }
 448             }
 449         }
 450         break;
 451 #endif
 452     default:
 453         /* Not known how to retry, so just fail. */
 454         break;
 455     }
 456
 457     va_end(ap);
 458 #endif
 459     return retptr;
 460 }
 461