Modules/getpath.c

   1 /* Return the initial module search path. */
   2
   3 #include "Python.h"
   4 #include "osdefs.h"
   5
   6 #include <sys/types.h>
   7 #include <string.h>
   8
   9 #ifdef __APPLE__
  10 #include <mach-o/dyld.h>
  11 #endif
  12
  13 /* Search in some common locations for the associated Python libraries.
  14  *
  15  * Two directories must be found, the platform independent directory
  16  * (prefix), containing the common .py and .pyc files, and the platform
  17  * dependent directory (exec_prefix), containing the shared library
  18  * modules.  Note that prefix and exec_prefix can be the same directory,
  19  * but for some installations, they are different.
  20  *
  21  * Py_GetPath() carries out separate searches for prefix and exec_prefix.
  22  * Each search tries a number of different locations until a ``landmark''
  23  * file or directory is found.  If no prefix or exec_prefix is found, a
  24  * warning message is issued and the preprocessor defined PREFIX and
  25  * EXEC_PREFIX are used (even though they will not work); python carries on
  26  * as best as is possible, but most imports will fail.
  27  *
  28  * Before any searches are done, the location of the executable is
  29  * determined.  If argv[0] has one or more slashes in it, it is used
  30  * unchanged.  Otherwise, it must have been invoked from the shell's path,
  31  * so we search $PATH for the named executable and use that.  If the
  32  * executable was not found on $PATH (or there was no $PATH environment
  33  * variable), the original argv[0] string is used.
  34  *
  35  * Next, the executable location is examined to see if it is a symbolic
  36  * link.  If so, the link is chased (correctly interpreting a relative
  37  * pathname if one is found) and the directory of the link target is used.
  38  *
  39  * Finally, argv0_path is set to the directory containing the executable
  40  * (i.e. the last component is stripped).
  41  *
  42  * With argv0_path in hand, we perform a number of steps.  The same steps
  43  * are performed for prefix and for exec_prefix, but with a different
  44  * landmark.
  45  *
  46  * Step 1. Are we running python out of the build directory?  This is
  47  * checked by looking for a different kind of landmark relative to
  48  * argv0_path.  For prefix, the landmark's path is derived from the VPATH
  49  * preprocessor variable (taking into account that its value is almost, but
  50  * not quite, what we need).  For exec_prefix, the landmark is
  51  * Modules/Setup.  If the landmark is found, we're done.
  52  *
  53  * For the remaining steps, the prefix landmark will always be
  54  * lib/python$VERSION/os.py and the exec_prefix will always be
  55  * lib/python$VERSION/lib-dynload, where $VERSION is Python's version
  56  * number as supplied by the Makefile.  Note that this means that no more
  57  * build directory checking is performed; if the first step did not find
  58  * the landmarks, the assumption is that python is running from an
  59  * installed setup.
  60  *
  61  * Step 2. See if the $PYTHONHOME environment variable points to the
  62  * installed location of the Python libraries.  If $PYTHONHOME is set, then
  63  * it points to prefix and exec_prefix.  $PYTHONHOME can be a single
  64  * directory, which is used for both, or the prefix and exec_prefix
  65  * directories separated by a colon.
  66  *
  67  * Step 3. Try to find prefix and exec_prefix relative to argv0_path,
  68  * backtracking up the path until it is exhausted.  This is the most common
  69  * step to succeed.  Note that if prefix and exec_prefix are different,
  70  * exec_prefix is more likely to be found; however if exec_prefix is a
  71  * subdirectory of prefix, both will be found.
  72  *
  73  * Step 4. Search the directories pointed to by the preprocessor variables
  74  * PREFIX and EXEC_PREFIX.  These are supplied by the Makefile but can be
  75  * passed in as options to the configure script.
  76  *
  77  * That's it!
  78  *
  79  * Well, almost.  Once we have determined prefix and exec_prefix, the
  80  * preprocessor variable PYTHONPATH is used to construct a path.  Each
  81  * relative path on PYTHONPATH is prefixed with prefix.  Then the directory
  82  * containing the shared library modules is appended.  The environment
  83  * variable $PYTHONPATH is inserted in front of it all.  Finally, the
  84  * prefix and exec_prefix globals are tweaked so they reflect the values
  85  * expected by other code, by stripping the "lib/python$VERSION/..." stuff
  86  * off.  If either points to the build directory, the globals are reset to
  87  * the corresponding preprocessor variables (so sys.prefix will reflect the
  88  * installation location, even though sys.path points into the build
  89  * directory).  This seems to make more sense given that currently the only
  90  * known use of sys.prefix and sys.exec_prefix is for the ILU installation
  91  * process to find the installed Python tree.
  92  */
  93
  94 #ifdef __cplusplus
  95  extern "C" {
  96 #endif
  97
  98
  99 #ifndef VERSION
 100 #define VERSION "2.1"
 101 #endif
 102
 103 #ifndef VPATH
 104 #define VPATH "."
 105 #endif
 106
 107 #ifndef PREFIX
 108 #  ifdef __VMS
 109 #    define PREFIX ""
 110 #  else
 111 #    define PREFIX "/usr/local"
 112 #  endif
 113 #endif
 114
 115 #ifndef EXEC_PREFIX
 116 #define EXEC_PREFIX PREFIX
 117 #endif
 118
 119 #ifndef PYTHONPATH
 120 #define PYTHONPATH PREFIX "/lib/python" VERSION ":" \
 121               EXEC_PREFIX "/lib/python" VERSION "/lib-dynload"
 122 #endif
 123
 124 #ifndef LANDMARK
 125 #define LANDMARK "os.py"
 126 #endif
 127
 128 static char prefix[MAXPATHLEN+1];
 129 static char exec_prefix[MAXPATHLEN+1];
 130 static char progpath[MAXPATHLEN+1];
 131 static char *module_search_path = NULL;
 132 static char lib_python[] = "lib/python" VERSION;
 133
 134 static void
 135 reduce(char *dir)
 136 {
 137     size_t i = strlen(dir);
 138     while (i > 0 && dir[i] != SEP)
 139         --i;
 140     dir[i] = '\0';
 141 }
 142
 143
 144 static int
 145 isfile(char *filename)          /* Is file, not directory */
 146 {
 147     struct stat buf;
 148     if (stat(filename, &buf) != 0)
 149         return 0;
 150     if (!S_ISREG(buf.st_mode))
 151         return 0;
 152     return 1;
 153 }
 154
 155
 156 static int
 157 ismodule(char *filename)        /* Is module -- check for .pyc/.pyo too */
 158 {
 159     if (isfile(filename))
 160         return 1;
 161
 162     /* Check for the compiled version of prefix. */
 163     if (strlen(filename) < MAXPATHLEN) {
 164         strcat(filename, Py_OptimizeFlag ? "o" : "c");
 165         if (isfile(filename))
 166             return 1;
 167     }
 168     return 0;
 169 }
 170
 171
 172 static int
 173 isxfile(char *filename)         /* Is executable file */
 174 {
 175     struct stat buf;
 176     if (stat(filename, &buf) != 0)
 177         return 0;
 178     if (!S_ISREG(buf.st_mode))
 179         return 0;
 180     if ((buf.st_mode & 0111) == 0)
 181         return 0;
 182     return 1;
 183 }
 184
 185
 186 static int
 187 isdir(char *filename)                   /* Is directory */
 188 {
 189     struct stat buf;
 190     if (stat(filename, &buf) != 0)
 191         return 0;
 192     if (!S_ISDIR(buf.st_mode))
 193         return 0;
 194     return 1;
 195 }
 196
 197
 198 /* Add a path component, by appending stuff to buffer.
 199    buffer must have at least MAXPATHLEN + 1 bytes allocated, and contain a
 200    NUL-terminated string with no more than MAXPATHLEN characters (not counting
 201    the trailing NUL).  It's a fatal error if it contains a string longer than
 202    that (callers must be careful!).  If these requirements are met, it's
 203    guaranteed that buffer will still be a NUL-terminated string with no more
 204    than MAXPATHLEN characters at exit.  If stuff is too long, only as much of
 205    stuff as fits will be appended.
 206 */
 207 static void
 208 joinpath(char *buffer, char *stuff)
 209 {
 210     size_t n, k;
 211     if (stuff[0] == SEP)
 212         n = 0;
 213     else {
 214         n = strlen(buffer);
 215         if (n > 0 && buffer[n-1] != SEP && n < MAXPATHLEN)
 216             buffer[n++] = SEP;
 217     }
 218     if (n > MAXPATHLEN)
 219         Py_FatalError("buffer overflow in getpath.c's joinpath()");
 220     k = strlen(stuff);
 221     if (n + k > MAXPATHLEN)
 222         k = MAXPATHLEN - n;
 223     strncpy(buffer+n, stuff, k);
 224     buffer[n+k] = '\0';
 225 }
 226
 227 /* copy_absolute requires that path be allocated at least
 228    MAXPATHLEN + 1 bytes and that p be no more than MAXPATHLEN bytes. */
 229 static void
 230 copy_absolute(char *path, char *p)
 231 {
 232     if (p[0] == SEP)
 233         strcpy(path, p);
 234     else {
 235         getcwd(path, MAXPATHLEN);
 236         if (p[0] == '.' && p[1] == SEP)
 237             p += 2;
 238         joinpath(path, p);
 239     }
 240 }
 241
 242 /* absolutize() requires that path be allocated at least MAXPATHLEN+1 bytes. */
 243 static void
 244 absolutize(char *path)
 245 {
 246     char buffer[MAXPATHLEN + 1];
 247
 248     if (path[0] == SEP)
 249         return;
 250     copy_absolute(buffer, path);
 251     strcpy(path, buffer);
 252 }
 253
 254 /* search_for_prefix requires that argv0_path be no more than MAXPATHLEN
 255    bytes long.
 256 */
 257 static int
 258 search_for_prefix(char *argv0_path, char *home)
 259 {
 260     size_t n;
 261     char *vpath;
 262
 263     /* If PYTHONHOME is set, we believe it unconditionally */
 264     if (home) {
 265         char *delim;
 266         strncpy(prefix, home, MAXPATHLEN);
 267         delim = strchr(prefix, DELIM);
 268         if (delim)
 269             *delim = '\0';
 270         joinpath(prefix, lib_python);
 271         joinpath(prefix, LANDMARK);
 272         return 1;
 273     }
 274
 275     /* Check to see if argv[0] is in the build directory */
 276     strcpy(prefix, argv0_path);
 277     joinpath(prefix, "Modules/Setup");
 278     if (isfile(prefix)) {
 279         /* Check VPATH to see if argv0_path is in the build directory. */
 280         vpath = VPATH;
 281         strcpy(prefix, argv0_path);
 282         joinpath(prefix, vpath);
 283         joinpath(prefix, "Lib");
 284         joinpath(prefix, LANDMARK);
 285         if (ismodule(prefix))
 286             return -1;
 287     }
 288
 289     /* Search from argv0_path, until root is found */
 290     copy_absolute(prefix, argv0_path);
 291     do {
 292         n = strlen(prefix);
 293         joinpath(prefix, lib_python);
 294         joinpath(prefix, LANDMARK);
 295         if (ismodule(prefix))
 296             return 1;
 297         prefix[n] = '\0';
 298         reduce(prefix);
 299     } while (prefix[0]);
 300
 301     /* Look at configure's PREFIX */
 302     strncpy(prefix, PREFIX, MAXPATHLEN);
 303     joinpath(prefix, lib_python);
 304     joinpath(prefix, LANDMARK);
 305     if (ismodule(prefix))
 306         return 1;
 307
 308     /* Fail */
 309     return 0;
 310 }
 311
 312
 313 /* search_for_exec_prefix requires that argv0_path be no more than
 314    MAXPATHLEN bytes long.
 315 */
 316 static int
 317 search_for_exec_prefix(char *argv0_path, char *home)
 318 {
 319     size_t n;
 320
 321     /* If PYTHONHOME is set, we believe it unconditionally */
 322     if (home) {
 323         char *delim;
 324         delim = strchr(home, DELIM);
 325         if (delim)
 326             strncpy(exec_prefix, delim+1, MAXPATHLEN);
 327         else
 328             strncpy(exec_prefix, home, MAXPATHLEN);
 329         joinpath(exec_prefix, lib_python);
 330         joinpath(exec_prefix, "lib-dynload");
 331         return 1;
 332     }
 333
 334     /* Check to see if argv[0] is in the build directory */
 335     strcpy(exec_prefix, argv0_path);
 336     joinpath(exec_prefix, "Modules/Setup");
 337     if (isfile(exec_prefix)) {
 338         reduce(exec_prefix);
 339         return -1;
 340     }
 341
 342     /* Search from argv0_path, until root is found */
 343     copy_absolute(exec_prefix, argv0_path);
 344     do {
 345         n = strlen(exec_prefix);
 346         joinpath(exec_prefix, lib_python);
 347         joinpath(exec_prefix, "lib-dynload");
 348         if (isdir(exec_prefix))
 349             return 1;
 350         exec_prefix[n] = '\0';
 351         reduce(exec_prefix);
 352     } while (exec_prefix[0]);
 353
 354     /* Look at configure's EXEC_PREFIX */
 355     strncpy(exec_prefix, EXEC_PREFIX, MAXPATHLEN);
 356     joinpath(exec_prefix, lib_python);
 357     joinpath(exec_prefix, "lib-dynload");
 358     if (isdir(exec_prefix))
 359         return 1;
 360
 361     /* Fail */
 362     return 0;
 363 }
 364
 365
 366 static void
 367 calculate_path(void)
 368 {
 369     extern char *Py_GetProgramName(void);
 370
 371     static char delimiter[2] = {DELIM, '\0'};
 372     static char separator[2] = {SEP, '\0'};
 373     char *pythonpath = PYTHONPATH;
 374     char *rtpypath = Py_GETENV("PYTHONPATH");
 375     char *home = Py_GetPythonHome();
 376     char *path = getenv("PATH");
 377     char *prog = Py_GetProgramName();
 378     char argv0_path[MAXPATHLEN+1];
 379     char zip_path[MAXPATHLEN+1];
 380     int pfound, efound; /* 1 if found; -1 if found build directory */
 381     char *buf;
 382     size_t bufsz;
 383     size_t prefixsz;
 384     char *defpath = pythonpath;
 385 #ifdef WITH_NEXT_FRAMEWORK
 386     NSModule pythonModule;
 387 #endif
 388 #ifdef __APPLE__
 389 #if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_4
 390     uint32_t nsexeclength = MAXPATHLEN;
 391 #else
 392     unsigned long nsexeclength = MAXPATHLEN;
 393 #endif
 394 #endif
 395
 396         /* If there is no slash in the argv0 path, then we have to
 397          * assume python is on the user's $PATH, since there's no
 398          * other way to find a directory to start the search from.  If
 399          * $PATH isn't exported, you lose.
 400          */
 401         if (strchr(prog, SEP))
 402                 strncpy(progpath, prog, MAXPATHLEN);
 403 #ifdef __APPLE__
 404      /* On Mac OS X, if a script uses an interpreter of the form
 405       * "#!/opt/python2.3/bin/python", the kernel only passes "python"
 406       * as argv[0], which falls through to the $PATH search below.
 407       * If /opt/python2.3/bin isn't in your path, or is near the end,
 408       * this algorithm may incorrectly find /usr/bin/python. To work
 409       * around this, we can use _NSGetExecutablePath to get a better
 410       * hint of what the intended interpreter was, although this
 411       * will fail if a relative path was used. but in that case,
 412       * absolutize() should help us out below
 413       */
 414      else if(0 == _NSGetExecutablePath(progpath, &nsexeclength) && progpath[0] == SEP)
 415        ;
 416 #endif /* __APPLE__ */
 417         else if (path) {
 418                 while (1) {
 419                         char *delim = strchr(path, DELIM);
 420
 421                         if (delim) {
 422                                 size_t len = delim - path;
 423                                 if (len > MAXPATHLEN)
 424                                         len = MAXPATHLEN;
 425                                 strncpy(progpath, path, len);
 426                                 *(progpath + len) = '\0';
 427                         }
 428                         else
 429                                 strncpy(progpath, path, MAXPATHLEN);
 430
 431                         joinpath(progpath, prog);
 432                         if (isxfile(progpath))
 433                                 break;
 434
 435                         if (!delim) {
 436                                 progpath[0] = '\0';
 437                                 break;
 438                         }
 439                         path = delim + 1;
 440                 }
 441         }
 442         else
 443                 progpath[0] = '\0';
 444         if (progpath[0] != SEP)
 445                 absolutize(progpath);
 446         strncpy(argv0_path, progpath, MAXPATHLEN);
 447         argv0_path[MAXPATHLEN] = '\0';
 448
 449 #ifdef WITH_NEXT_FRAMEWORK
 450         /* On Mac OS X we have a special case if we're running from a framework.
 451         ** This is because the python home should be set relative to the library,
 452         ** which is in the framework, not relative to the executable, which may
 453         ** be outside of the framework. Except when we're in the build directory...
 454         */
 455     pythonModule = NSModuleForSymbol(NSLookupAndBindSymbol("_Py_Initialize"));
 456     /* Use dylib functions to find out where the framework was loaded from */
 457     buf = (char *)NSLibraryNameForModule(pythonModule);
 458     if (buf != NULL) {
 459         /* We're in a framework. */
 460         /* See if we might be in the build directory. The framework in the
 461         ** build directory is incomplete, it only has the .dylib and a few
 462         ** needed symlinks, it doesn't have the Lib directories and such.
 463         ** If we're running with the framework from the build directory we must
 464         ** be running the interpreter in the build directory, so we use the
 465         ** build-directory-specific logic to find Lib and such.
 466         */
 467         strncpy(argv0_path, buf, MAXPATHLEN);
 468         reduce(argv0_path);
 469         joinpath(argv0_path, lib_python);
 470         joinpath(argv0_path, LANDMARK);
 471         if (!ismodule(argv0_path)) {
 472                 /* We are in the build directory so use the name of the
 473                    executable - we know that the absolute path is passed */
 474                 strncpy(argv0_path, prog, MAXPATHLEN);
 475         }
 476         else {
 477                 /* Use the location of the library as the progpath */
 478                 strncpy(argv0_path, buf, MAXPATHLEN);
 479         }
 480     }
 481 #endif
 482
 483 #if HAVE_READLINK
 484     {
 485         char tmpbuffer[MAXPATHLEN+1];
 486         int linklen = readlink(progpath, tmpbuffer, MAXPATHLEN);
 487         while (linklen != -1) {
 488             /* It's not null terminated! */
 489             tmpbuffer[linklen] = '\0';
 490             if (tmpbuffer[0] == SEP)
 491                 /* tmpbuffer should never be longer than MAXPATHLEN,
 492                    but extra check does not hurt */
 493                 strncpy(argv0_path, tmpbuffer, MAXPATHLEN);
 494             else {
 495                 /* Interpret relative to progpath */
 496                 reduce(argv0_path);
 497                 joinpath(argv0_path, tmpbuffer);
 498             }
 499             linklen = readlink(argv0_path, tmpbuffer, MAXPATHLEN);
 500         }
 501     }
 502 #endif /* HAVE_READLINK */
 503
 504     reduce(argv0_path);
 505     /* At this point, argv0_path is guaranteed to be less than
 506        MAXPATHLEN bytes long.
 507     */
 508
 509     if (!(pfound = search_for_prefix(argv0_path, home))) {
 510         if (!Py_FrozenFlag)
 511             fprintf(stderr,
 512                 "Could not find platform independent libraries <prefix>\n");
 513         strncpy(prefix, PREFIX, MAXPATHLEN);
 514         joinpath(prefix, lib_python);
 515     }
 516     else
 517         reduce(prefix);
 518
 519     strncpy(zip_path, prefix, MAXPATHLEN);
 520     zip_path[MAXPATHLEN] = '\0';
 521     if (pfound > 0) { /* Use the reduced prefix returned by Py_GetPrefix() */
 522         reduce(zip_path);
 523         reduce(zip_path);
 524     }
 525     else
 526         strncpy(zip_path, PREFIX, MAXPATHLEN);
 527     joinpath(zip_path, "lib/python00.zip");
 528     bufsz = strlen(zip_path);   /* Replace "00" with version */
 529     zip_path[bufsz - 6] = VERSION[0];
 530     zip_path[bufsz - 5] = VERSION[2];
 531
 532     if (!(efound = search_for_exec_prefix(argv0_path, home))) {
 533         if (!Py_FrozenFlag)
 534             fprintf(stderr,
 535                 "Could not find platform dependent libraries <exec_prefix>\n");
 536         strncpy(exec_prefix, EXEC_PREFIX, MAXPATHLEN);
 537         joinpath(exec_prefix, "lib/lib-dynload");
 538     }
 539     /* If we found EXEC_PREFIX do *not* reduce it!  (Yet.) */
 540
 541     if ((!pfound || !efound) && !Py_FrozenFlag)
 542         fprintf(stderr,
 543                 "Consider setting $PYTHONHOME to <prefix>[:<exec_prefix>]\n");
 544
 545     /* Calculate size of return buffer.
 546      */
 547     bufsz = 0;
 548
 549     if (rtpypath)
 550         bufsz += strlen(rtpypath) + 1;
 551
 552     prefixsz = strlen(prefix) + 1;
 553
 554     while (1) {
 555         char *delim = strchr(defpath, DELIM);
 556
 557         if (defpath[0] != SEP)
 558             /* Paths are relative to prefix */
 559             bufsz += prefixsz;
 560
 561         if (delim)
 562             bufsz += delim - defpath + 1;
 563         else {
 564             bufsz += strlen(defpath) + 1;
 565             break;
 566         }
 567         defpath = delim + 1;
 568     }
 569
 570     bufsz += strlen(zip_path) + 1;
 571     bufsz += strlen(exec_prefix) + 1;
 572
 573     /* This is the only malloc call in this file */
 574     buf = (char *)PyMem_Malloc(bufsz);
 575
 576     if (buf == NULL) {
 577         /* We can't exit, so print a warning and limp along */
 578         fprintf(stderr, "Not enough memory for dynamic PYTHONPATH.\n");
 579         fprintf(stderr, "Using default static PYTHONPATH.\n");
 580         module_search_path = PYTHONPATH;
 581     }
 582     else {
 583         /* Run-time value of $PYTHONPATH goes first */
 584         if (rtpypath) {
 585             strcpy(buf, rtpypath);
 586             strcat(buf, delimiter);
 587         }
 588         else
 589             buf[0] = '\0';
 590
 591         /* Next is the default zip path */
 592         strcat(buf, zip_path);
 593         strcat(buf, delimiter);
 594
 595         /* Next goes merge of compile-time $PYTHONPATH with
 596          * dynamically located prefix.
 597          */
 598         defpath = pythonpath;
 599         while (1) {
 600             char *delim = strchr(defpath, DELIM);
 601
 602             if (defpath[0] != SEP) {
 603                 strcat(buf, prefix);
 604                 strcat(buf, separator);
 605             }
 606
 607             if (delim) {
 608                 size_t len = delim - defpath + 1;
 609                 size_t end = strlen(buf) + len;
 610                 strncat(buf, defpath, len);
 611                 *(buf + end) = '\0';
 612             }
 613             else {
 614                 strcat(buf, defpath);
 615                 break;
 616             }
 617             defpath = delim + 1;
 618         }
 619         strcat(buf, delimiter);
 620
 621         /* Finally, on goes the directory for dynamic-load modules */
 622         strcat(buf, exec_prefix);
 623
 624         /* And publish the results */
 625         module_search_path = buf;
 626     }
 627
 628     /* Reduce prefix and exec_prefix to their essence,
 629      * e.g. /usr/local/lib/python1.5 is reduced to /usr/local.
 630      * If we're loading relative to the build directory,
 631      * return the compiled-in defaults instead.
 632      */
 633     if (pfound > 0) {
 634         reduce(prefix);
 635         reduce(prefix);
 636         /* The prefix is the root directory, but reduce() chopped
 637          * off the "/". */
 638         if (!prefix[0])
 639                 strcpy(prefix, separator);
 640     }
 641     else
 642         strncpy(prefix, PREFIX, MAXPATHLEN);
 643
 644     if (efound > 0) {
 645         reduce(exec_prefix);
 646         reduce(exec_prefix);
 647         reduce(exec_prefix);
 648         if (!exec_prefix[0])
 649                 strcpy(exec_prefix, separator);
 650     }
 651     else
 652         strncpy(exec_prefix, EXEC_PREFIX, MAXPATHLEN);
 653 }
 654
 655
 656 /* External interface */
 657
 658 char *
 659 Py_GetPath(void)
 660 {
 661     if (!module_search_path)
 662         calculate_path();
 663     return module_search_path;
 664 }
 665
 666 char *
 667 Py_GetPrefix(void)
 668 {
 669     if (!module_search_path)
 670         calculate_path();
 671     return prefix;
 672 }
 673
 674 char *
 675 Py_GetExecPrefix(void)
 676 {
 677     if (!module_search_path)
 678         calculate_path();
 679     return exec_prefix;
 680 }
 681
 682 char *
 683 Py_GetProgramFullPath(void)
 684 {
 685     if (!module_search_path)
 686         calculate_path();
 687     return progpath;
 688 }
 689
 690
 691 #ifdef __cplusplus
 692 }
 693 #endif
 694