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 #ifdef HAS_ASCTIME_R
  26         PL_reentrant_buffer->_asctime_size = 256; /* Make something up. */
  27 #endif /* HAS_ASCTIME_R */
  28 #ifdef HAS_CRYPT_R
  29 #endif /* HAS_CRYPT_R */
  30 #ifdef HAS_CTIME_R
  31         PL_reentrant_buffer->_ctime_size = 256; /* Make something up. */
  32 #endif /* HAS_CTIME_R */
  33 #ifdef HAS_DRAND48_R
  34 #endif /* HAS_DRAND48_R */
  35 #ifdef HAS_GETGRNAM_R
  36 #   if defined(HAS_SYSCONF) && defined(_SC_GETGR_R_SIZE_MAX) && !defined(__GLIBC__)
  37         PL_reentrant_buffer->_getgrent_size = sysconf(_SC_GETGR_R_SIZE_MAX);
  38 #   else
  39 #       if defined(__osf__) && defined(__alpha) && defined(SIABUFSIZ)
  40         PL_reentrant_buffer->_getgrent_size = SIABUFSIZ;
  41 #       else
  42 #           ifdef __sgi
  43         PL_reentrant_buffer->_getgrent_size = BUFSIZ;
  44 #           else
  45         PL_reentrant_buffer->_getgrent_size = 256;
  46 #           endif
  47 #       endif
  48 #   endif
  49 #endif /* HAS_GETGRNAM_R */
  50 #ifdef HAS_GETHOSTBYNAME_R
  51 #if   !(GETHOSTBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
  52         PL_reentrant_buffer->_gethostent_size = 2048; /* Any better ideas? */
  53 #endif
  54 #endif /* HAS_GETHOSTBYNAME_R */
  55 #ifdef HAS_GETLOGIN_R
  56         PL_reentrant_buffer->_getlogin_size = 256; /* Make something up. */
  57 #endif /* HAS_GETLOGIN_R */
  58 #ifdef HAS_GETNETBYNAME_R
  59 #if   !(GETNETBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
  60         PL_reentrant_buffer->_getnetent_size = 2048; /* Any better ideas? */
  61 #endif
  62 #endif /* HAS_GETNETBYNAME_R */
  63 #ifdef HAS_GETPROTOBYNAME_R
  64 #if   !(GETPROTOBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
  65         PL_reentrant_buffer->_getprotoent_size = 2048; /* Any better ideas? */
  66 #endif
  67 #endif /* HAS_GETPROTOBYNAME_R */
  68 #ifdef HAS_GETPWNAM_R
  69 #   if defined(HAS_SYSCONF) && defined(_SC_GETPW_R_SIZE_MAX) && !defined(__GLIBC__)
  70         PL_reentrant_buffer->_getpwent_size = sysconf(_SC_GETPW_R_SIZE_MAX);
  71 #   else
  72 #       if defined(__osf__) && defined(__alpha) && defined(SIABUFSIZ)
  73         PL_reentrant_buffer->_getpwent_size = SIABUFSIZ;
  74 #       else
  75 #           ifdef __sgi
  76         PL_reentrant_buffer->_getpwent_size = BUFSIZ;
  77 #           else
  78         PL_reentrant_buffer->_getpwent_size = 256;
  79 #           endif
  80 #       endif
  81 #   endif
  82 #endif /* HAS_GETPWNAM_R */
  83 #ifdef HAS_GETSERVBYNAME_R
  84 #if   !(GETSERVBYNAME_R_PROTO == REENTRANT_PROTO_I_CCSD)
  85         PL_reentrant_buffer->_getservent_size = 2048; /* Any better ideas? */
  86 #endif
  87 #endif /* HAS_GETSERVBYNAME_R */
  88 #ifdef HAS_GETSPNAM_R
  89         PL_reentrant_buffer->_getspent_size = 1024;
  90 #endif /* HAS_GETSPNAM_R */
  91 #ifdef HAS_GMTIME_R
  92 #endif /* HAS_GMTIME_R */
  93 #ifdef HAS_LOCALTIME_R
  94 #endif /* HAS_LOCALTIME_R */
  95 #ifdef HAS_RANDOM_R
  96 #endif /* HAS_RANDOM_R */
  97 #ifdef HAS_READDIR_R
  98         /* This is the size Solaris recommends.
  99          * (though we go static, should use pathconf() instead) */
 100         PL_reentrant_buffer->_readdir_size = sizeof(struct dirent) + MAXPATHLEN + 1;
 101 #endif /* HAS_READDIR_R */
 102 #ifdef HAS_READDIR64_R
 103         /* This is the size Solaris recommends.
 104          * (though we go static, should use pathconf() instead) */
 105         PL_reentrant_buffer->_readdir64_size = sizeof(struct dirent64) + MAXPATHLEN + 1;
 106 #endif /* HAS_READDIR64_R */
 107 #ifdef HAS_SETLOCALE_R
 108         PL_reentrant_buffer->_setlocale_size = 256; /* Make something up. */
 109 #endif /* HAS_SETLOCALE_R */
 110 #ifdef HAS_STRERROR_R
 111         PL_reentrant_buffer->_strerror_size = 256; /* Make something up. */
 112 #endif /* HAS_STRERROR_R */
 113 #ifdef HAS_TTYNAME_R
 114         PL_reentrant_buffer->_ttyname_size = 256; /* Make something up. */
 115 #endif /* HAS_TTYNAME_R */
 116
 117 #endif /* USE_REENTRANT_API */
 118 }
 119
 120 void
 121 Perl_reentrant_init(pTHX) {
 122 #ifdef USE_REENTRANT_API
 123         New(31337, PL_reentrant_buffer, 1, REENTR);
 124         Perl_reentrant_size(aTHX);
 125 #ifdef HAS_ASCTIME_R
 126         New(31338, PL_reentrant_buffer->_asctime_buffer, PL_reentrant_buffer->_asctime_size, char);
 127 #endif /* HAS_ASCTIME_R */
 128 #ifdef HAS_CRYPT_R
 129 #ifdef __GLIBC__
 130         PL_reentrant_buffer->_crypt_struct.initialized = 0;
 131 #endif
 132 #endif /* HAS_CRYPT_R */
 133 #ifdef HAS_CTIME_R
 134         New(31338, PL_reentrant_buffer->_ctime_buffer, PL_reentrant_buffer->_ctime_size, char);
 135 #endif /* HAS_CTIME_R */
 136 #ifdef HAS_DRAND48_R
 137 #endif /* HAS_DRAND48_R */
 138 #ifdef HAS_GETGRNAM_R
 139 #   ifdef USE_GETGRENT_FPTR
 140         PL_reentrant_buffer->_getgrent_fptr = NULL;
 141 #   endif
 142         New(31338, PL_reentrant_buffer->_getgrent_buffer, PL_reentrant_buffer->_getgrent_size, char);
 143 #endif /* HAS_GETGRNAM_R */
 144 #ifdef HAS_GETHOSTBYNAME_R
 145 #if   !(GETHOSTBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
 146         New(31338, PL_reentrant_buffer->_gethostent_buffer, PL_reentrant_buffer->_gethostent_size, char);
 147 #endif
 148 #endif /* HAS_GETHOSTBYNAME_R */
 149 #ifdef HAS_GETLOGIN_R
 150         New(31338, PL_reentrant_buffer->_getlogin_buffer, PL_reentrant_buffer->_getlogin_size, char);
 151 #endif /* HAS_GETLOGIN_R */
 152 #ifdef HAS_GETNETBYNAME_R
 153 #if   !(GETNETBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
 154         New(31338, PL_reentrant_buffer->_getnetent_buffer, PL_reentrant_buffer->_getnetent_size, char);
 155 #endif
 156 #endif /* HAS_GETNETBYNAME_R */
 157 #ifdef HAS_GETPROTOBYNAME_R
 158 #if   !(GETPROTOBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
 159         New(31338, PL_reentrant_buffer->_getprotoent_buffer, PL_reentrant_buffer->_getprotoent_size, char);
 160 #endif
 161 #endif /* HAS_GETPROTOBYNAME_R */
 162 #ifdef HAS_GETPWNAM_R
 163 #   ifdef USE_GETPWENT_FPTR
 164         PL_reentrant_buffer->_getpwent_fptr = NULL;
 165 #   endif
 166         New(31338, PL_reentrant_buffer->_getpwent_buffer, PL_reentrant_buffer->_getpwent_size, char);
 167 #endif /* HAS_GETPWNAM_R */
 168 #ifdef HAS_GETSERVBYNAME_R
 169 #if   !(GETSERVBYNAME_R_PROTO == REENTRANT_PROTO_I_CCSD)
 170         New(31338, PL_reentrant_buffer->_getservent_buffer, PL_reentrant_buffer->_getservent_size, char);
 171 #endif
 172 #endif /* HAS_GETSERVBYNAME_R */
 173 #ifdef HAS_GETSPNAM_R
 174         New(31338, PL_reentrant_buffer->_getspent_buffer, PL_reentrant_buffer->_getspent_size, char);
 175 #endif /* HAS_GETSPNAM_R */
 176 #ifdef HAS_GMTIME_R
 177 #endif /* HAS_GMTIME_R */
 178 #ifdef HAS_LOCALTIME_R
 179 #endif /* HAS_LOCALTIME_R */
 180 #ifdef HAS_RANDOM_R
 181 #endif /* HAS_RANDOM_R */
 182 #ifdef HAS_READDIR_R
 183         PL_reentrant_buffer->_readdir_struct = (struct dirent*)safemalloc(PL_reentrant_buffer->_readdir_size);
 184 #endif /* HAS_READDIR_R */
 185 #ifdef HAS_READDIR64_R
 186         PL_reentrant_buffer->_readdir64_struct = (struct dirent64*)safemalloc(PL_reentrant_buffer->_readdir64_size);
 187 #endif /* HAS_READDIR64_R */
 188 #ifdef HAS_SETLOCALE_R
 189         New(31338, PL_reentrant_buffer->_setlocale_buffer, PL_reentrant_buffer->_setlocale_size, char);
 190 #endif /* HAS_SETLOCALE_R */
 191 #ifdef HAS_STRERROR_R
 192         New(31338, PL_reentrant_buffer->_strerror_buffer, PL_reentrant_buffer->_strerror_size, char);
 193 #endif /* HAS_STRERROR_R */
 194 #ifdef HAS_TTYNAME_R
 195         New(31338, PL_reentrant_buffer->_ttyname_buffer, PL_reentrant_buffer->_ttyname_size, char);
 196 #endif /* HAS_TTYNAME_R */
 197
 198 #endif /* USE_REENTRANT_API */
 199 }
 200
 201 void
 202 Perl_reentrant_free(pTHX) {
 203 #ifdef USE_REENTRANT_API
 204 #ifdef HAS_ASCTIME_R
 205         Safefree(PL_reentrant_buffer->_asctime_buffer);
 206 #endif /* HAS_ASCTIME_R */
 207 #ifdef HAS_CRYPT_R
 208 #endif /* HAS_CRYPT_R */
 209 #ifdef HAS_CTIME_R
 210         Safefree(PL_reentrant_buffer->_ctime_buffer);
 211 #endif /* HAS_CTIME_R */
 212 #ifdef HAS_DRAND48_R
 213 #endif /* HAS_DRAND48_R */
 214 #ifdef HAS_GETGRNAM_R
 215         Safefree(PL_reentrant_buffer->_getgrent_buffer);
 216 #endif /* HAS_GETGRNAM_R */
 217 #ifdef HAS_GETHOSTBYNAME_R
 218 #if   !(GETHOSTBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
 219         Safefree(PL_reentrant_buffer->_gethostent_buffer);
 220 #endif
 221 #endif /* HAS_GETHOSTBYNAME_R */
 222 #ifdef HAS_GETLOGIN_R
 223         Safefree(PL_reentrant_buffer->_getlogin_buffer);
 224 #endif /* HAS_GETLOGIN_R */
 225 #ifdef HAS_GETNETBYNAME_R
 226 #if   !(GETNETBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
 227         Safefree(PL_reentrant_buffer->_getnetent_buffer);
 228 #endif
 229 #endif /* HAS_GETNETBYNAME_R */
 230 #ifdef HAS_GETPROTOBYNAME_R
 231 #if   !(GETPROTOBYNAME_R_PROTO == REENTRANT_PROTO_I_CSD)
 232         Safefree(PL_reentrant_buffer->_getprotoent_buffer);
 233 #endif
 234 #endif /* HAS_GETPROTOBYNAME_R */
 235 #ifdef HAS_GETPWNAM_R
 236         Safefree(PL_reentrant_buffer->_getpwent_buffer);
 237 #endif /* HAS_GETPWNAM_R */
 238 #ifdef HAS_GETSERVBYNAME_R
 239 #if   !(GETSERVBYNAME_R_PROTO == REENTRANT_PROTO_I_CCSD)
 240         Safefree(PL_reentrant_buffer->_getservent_buffer);
 241 #endif
 242 #endif /* HAS_GETSERVBYNAME_R */
 243 #ifdef HAS_GETSPNAM_R
 244         Safefree(PL_reentrant_buffer->_getspent_buffer);
 245 #endif /* HAS_GETSPNAM_R */
 246 #ifdef HAS_GMTIME_R
 247 #endif /* HAS_GMTIME_R */
 248 #ifdef HAS_LOCALTIME_R
 249 #endif /* HAS_LOCALTIME_R */
 250 #ifdef HAS_RANDOM_R
 251 #endif /* HAS_RANDOM_R */
 252 #ifdef HAS_READDIR_R
 253         Safefree(PL_reentrant_buffer->_readdir_struct);
 254 #endif /* HAS_READDIR_R */
 255 #ifdef HAS_READDIR64_R
 256         Safefree(PL_reentrant_buffer->_readdir64_struct);
 257 #endif /* HAS_READDIR64_R */
 258 #ifdef HAS_SETLOCALE_R
 259         Safefree(PL_reentrant_buffer->_setlocale_buffer);
 260 #endif /* HAS_SETLOCALE_R */
 261 #ifdef HAS_STRERROR_R
 262         Safefree(PL_reentrant_buffer->_strerror_buffer);
 263 #endif /* HAS_STRERROR_R */
 264 #ifdef HAS_TTYNAME_R
 265         Safefree(PL_reentrant_buffer->_ttyname_buffer);
 266 #endif /* HAS_TTYNAME_R */
 267
 268         Safefree(PL_reentrant_buffer);
 269 #endif /* USE_REENTRANT_API */
 270 }
 271
 272 void*
 273 Perl_reentrant_retry(const char *f, ...)
 274 {
 275     dTHX;
 276     void *retptr = NULL;
 277 #ifdef USE_REENTRANT_API
 278     void *p0, *p1;
 279     size_t asize;
 280     int anint;
 281     va_list ap;
 282
 283     va_start(ap, f);
 284
 285 #define REENTRANTHALFMAXSIZE 32768 /* The maximum may end up twice this. */
 286
 287     switch (PL_op->op_type) {
 288 #ifdef USE_GETHOSTENT_BUFFER
 289     case OP_GHBYADDR:
 290     case OP_GHBYNAME:
 291     case OP_GHOSTENT:
 292         {
 293             if (PL_reentrant_buffer->_gethostent_size <= REENTRANTHALFMAXSIZE) {
 294                 PL_reentrant_buffer->_gethostent_size *= 2;
 295                 Renew(PL_reentrant_buffer->_gethostent_buffer,
 296                       PL_reentrant_buffer->_gethostent_size, char);
 297                 switch (PL_op->op_type) {
 298                 case OP_GHBYADDR:
 299                     p0    = va_arg(ap, void *);
 300                     asize = va_arg(ap, size_t);
 301                     anint  = va_arg(ap, int);
 302                     retptr = gethostbyaddr(p0, asize, anint); break;
 303                 case OP_GHBYNAME:
 304                     p0 = va_arg(ap, void *);
 305                     retptr = gethostbyname(p0); break;
 306                 case OP_GHOSTENT:
 307                     retptr = gethostent(); break;
 308                 default:
 309                     break;
 310                 }
 311             }
 312         }
 313         break;
 314 #endif
 315 #ifdef USE_GETGRENT_BUFFER
 316     case OP_GGRNAM:
 317     case OP_GGRGID:
 318     case OP_GGRENT:
 319         {
 320             if (PL_reentrant_buffer->_getgrent_size <= REENTRANTHALFMAXSIZE) {
 321                 Gid_t gid;
 322                 PL_reentrant_buffer->_getgrent_size *= 2;
 323                 Renew(PL_reentrant_buffer->_getgrent_buffer,
 324                       PL_reentrant_buffer->_getgrent_size, char);
 325                 switch (PL_op->op_type) {
 326                 case OP_GGRNAM:
 327                     p0 = va_arg(ap, void *);
 328                     retptr = getgrnam(p0); break;
 329                 case OP_GGRGID:
 330                     gid = va_arg(ap, Gid_t);
 331                     retptr = getgrgid(gid); break;
 332                 case OP_GGRENT:
 333                     retptr = getgrent(); break;
 334                 default:
 335                     break;
 336                 }
 337             }
 338         }
 339         break;
 340 #endif
 341 #ifdef USE_GETNETENT_BUFFER
 342     case OP_GNBYADDR:
 343     case OP_GNBYNAME:
 344     case OP_GNETENT:
 345         {
 346             if (PL_reentrant_buffer->_getnetent_size <= REENTRANTHALFMAXSIZE) {
 347                 Netdb_net_t net;
 348                 PL_reentrant_buffer->_getnetent_size *= 2;
 349                 Renew(PL_reentrant_buffer->_getnetent_buffer,
 350                       PL_reentrant_buffer->_getnetent_size, char);
 351                 switch (PL_op->op_type) {
 352                 case OP_GNBYADDR:
 353                     net = va_arg(ap, Netdb_net_t);
 354                     anint = va_arg(ap, int);
 355                     retptr = getnetbyaddr(net, anint); break;
 356                 case OP_GNBYNAME:
 357                     p0 = va_arg(ap, void *);
 358                     retptr = getnetbyname(p0); break;
 359                 case OP_GNETENT:
 360                     retptr = getnetent(); break;
 361                 default:
 362                     break;
 363                 }
 364             }
 365         }
 366         break;
 367 #endif
 368 #ifdef USE_GETPWENT_BUFFER
 369     case OP_GPWNAM:
 370     case OP_GPWUID:
 371     case OP_GPWENT:
 372         {
 373             if (PL_reentrant_buffer->_getpwent_size <= REENTRANTHALFMAXSIZE) {
 374                 Uid_t uid;
 375                 PL_reentrant_buffer->_getpwent_size *= 2;
 376                 Renew(PL_reentrant_buffer->_getpwent_buffer,
 377                       PL_reentrant_buffer->_getpwent_size, char);
 378                 switch (PL_op->op_type) {
 379                 case OP_GPWNAM:
 380                     p0 = va_arg(ap, void *);
 381                     retptr = getpwnam(p0); break;
 382                 case OP_GPWUID:
 383                     uid = va_arg(ap, Uid_t);
 384                     retptr = getpwuid(uid); break;
 385                 case OP_GPWENT:
 386                     retptr = getpwent(); break;
 387                 default:
 388                     break;
 389                 }
 390             }
 391         }
 392         break;
 393 #endif
 394 #ifdef USE_GETPROTOENT_BUFFER
 395     case OP_GPBYNAME:
 396     case OP_GPBYNUMBER:
 397     case OP_GPROTOENT:
 398         {
 399             if (PL_reentrant_buffer->_getprotoent_size <= REENTRANTHALFMAXSIZE) {
 400                 PL_reentrant_buffer->_getprotoent_size *= 2;
 401                 Renew(PL_reentrant_buffer->_getprotoent_buffer,
 402                       PL_reentrant_buffer->_getprotoent_size, char);
 403                 switch (PL_op->op_type) {
 404                 case OP_GPBYNAME:
 405                     p0 = va_arg(ap, void *);
 406                     retptr = getprotobyname(p0); break;
 407                 case OP_GPBYNUMBER:
 408                     anint = va_arg(ap, int);
 409                     retptr = getprotobynumber(anint); break;
 410                 case OP_GPROTOENT:
 411                     retptr = getprotoent(); break;
 412                 default:
 413                     break;
 414                 }
 415             }
 416         }
 417         break;
 418 #endif
 419 #ifdef USE_GETSERVENT_BUFFER
 420     case OP_GSBYNAME:
 421     case OP_GSBYPORT:
 422     case OP_GSERVENT:
 423         {
 424             if (PL_reentrant_buffer->_getservent_size <= REENTRANTHALFMAXSIZE) {
 425                 PL_reentrant_buffer->_getservent_size *= 2;
 426                 Renew(PL_reentrant_buffer->_getservent_buffer,
 427                       PL_reentrant_buffer->_getservent_size, char);
 428                 switch (PL_op->op_type) {
 429                 case OP_GSBYNAME:
 430                     p0 = va_arg(ap, void *);
 431                     p1 = va_arg(ap, void *);
 432                     retptr = getservbyname(p0, p1); break;
 433                 case OP_GSBYPORT:
 434                     anint = va_arg(ap, int);
 435                     p0 = va_arg(ap, void *);
 436                     retptr = getservbyport(anint, p0); break;
 437                 case OP_GSERVENT:
 438                     retptr = getservent(); break;
 439                 default:
 440                     break;
 441                 }
 442             }
 443         }
 444         break;
 445 #endif
 446     default:
 447         /* Not known how to retry, so just fail. */
 448         break;
 449     }
 450
 451     va_end(ap);
 452 #endif
 453     return retptr;
 454 }
 455