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1626 lines
45 KiB
1626 lines
45 KiB
/* Return the initial module search path. */
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#include "Python.h"
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#include "pycore_fileutils.h"
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#include "pycore_initconfig.h"
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#include "pycore_pathconfig.h"
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#include "osdefs.h" // DELIM
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#include <sys/types.h>
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#include <string.h>
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#ifdef __APPLE__
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# include <AvailabilityMacros.h>
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# include <mach-o/dyld.h>
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#endif
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/* Search in some common locations for the associated Python libraries.
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*
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* Two directories must be found, the platform independent directory
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* (prefix), containing the common .py and .pyc files, and the platform
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* dependent directory (exec_prefix), containing the shared library
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* modules. Note that prefix and exec_prefix can be the same directory,
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* but for some installations, they are different.
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*
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* Py_GetPath() carries out separate searches for prefix and exec_prefix.
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* Each search tries a number of different locations until a ``landmark''
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* file or directory is found. If no prefix or exec_prefix is found, a
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* warning message is issued and the preprocessor defined PREFIX and
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* EXEC_PREFIX are used (even though they will not work); python carries on
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* as best as is possible, but most imports will fail.
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*
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* Before any searches are done, the location of the executable is
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* determined. If argv[0] has one or more slashes in it, it is used
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* unchanged. Otherwise, it must have been invoked from the shell's path,
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* so we search $PATH for the named executable and use that. If the
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* executable was not found on $PATH (or there was no $PATH environment
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* variable), the original argv[0] string is used.
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*
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* Next, the executable location is examined to see if it is a symbolic
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* link. If so, the link is chased (correctly interpreting a relative
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* pathname if one is found) and the directory of the link target is used.
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*
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* Finally, argv0_path is set to the directory containing the executable
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* (i.e. the last component is stripped).
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*
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* With argv0_path in hand, we perform a number of steps. The same steps
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* are performed for prefix and for exec_prefix, but with a different
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* landmark.
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*
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* Step 1. Are we running python out of the build directory? This is
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* checked by looking for a different kind of landmark relative to
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* argv0_path. For prefix, the landmark's path is derived from the VPATH
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* preprocessor variable (taking into account that its value is almost, but
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* not quite, what we need). For exec_prefix, the landmark is
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* pybuilddir.txt. If the landmark is found, we're done.
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*
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* For the remaining steps, the prefix landmark will always be
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* lib/python$VERSION/os.py and the exec_prefix will always be
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* lib/python$VERSION/lib-dynload, where $VERSION is Python's version
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* number as supplied by the Makefile. Note that this means that no more
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* build directory checking is performed; if the first step did not find
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* the landmarks, the assumption is that python is running from an
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* installed setup.
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*
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* Step 2. See if the $PYTHONHOME environment variable points to the
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* installed location of the Python libraries. If $PYTHONHOME is set, then
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* it points to prefix and exec_prefix. $PYTHONHOME can be a single
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* directory, which is used for both, or the prefix and exec_prefix
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* directories separated by a colon.
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*
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* Step 3. Try to find prefix and exec_prefix relative to argv0_path,
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* backtracking up the path until it is exhausted. This is the most common
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* step to succeed. Note that if prefix and exec_prefix are different,
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* exec_prefix is more likely to be found; however if exec_prefix is a
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* subdirectory of prefix, both will be found.
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*
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* Step 4. Search the directories pointed to by the preprocessor variables
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* PREFIX and EXEC_PREFIX. These are supplied by the Makefile but can be
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* passed in as options to the configure script.
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*
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* That's it!
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*
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* Well, almost. Once we have determined prefix and exec_prefix, the
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* preprocessor variable PYTHONPATH is used to construct a path. Each
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* relative path on PYTHONPATH is prefixed with prefix. Then the directory
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* containing the shared library modules is appended. The environment
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* variable $PYTHONPATH is inserted in front of it all. Finally, the
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* prefix and exec_prefix globals are tweaked so they reflect the values
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* expected by other code, by stripping the "lib/python$VERSION/..." stuff
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* off. If either points to the build directory, the globals are reset to
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* the corresponding preprocessor variables (so sys.prefix will reflect the
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* installation location, even though sys.path points into the build
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* directory). This seems to make more sense given that currently the only
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* known use of sys.prefix and sys.exec_prefix is for the ILU installation
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* process to find the installed Python tree.
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*
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* An embedding application can use Py_SetPath() to override all of
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* these automatic path computations.
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*
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* NOTE: Windows MSVC builds use PC/getpathp.c instead!
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*/
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#ifdef __cplusplus
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extern "C" {
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#endif
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#if (!defined(PREFIX) || !defined(EXEC_PREFIX) \
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|| !defined(VERSION) || !defined(VPATH))
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#error "PREFIX, EXEC_PREFIX, VERSION and VPATH macros must be defined"
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#endif
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#ifndef LANDMARK
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#define LANDMARK L"os.py"
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#endif
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#define BUILD_LANDMARK L"Modules/Setup.local"
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#define DECODE_LOCALE_ERR(NAME, LEN) \
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((LEN) == (size_t)-2) \
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? _PyStatus_ERR("cannot decode " NAME) \
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: _PyStatus_NO_MEMORY()
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#define PATHLEN_ERR() _PyStatus_ERR("path configuration: path too long")
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typedef struct {
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wchar_t *path_env; /* PATH environment variable */
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wchar_t *pythonpath_macro; /* PYTHONPATH macro */
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wchar_t *prefix_macro; /* PREFIX macro */
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wchar_t *exec_prefix_macro; /* EXEC_PREFIX macro */
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wchar_t *vpath_macro; /* VPATH macro */
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wchar_t *lib_python; /* <platlibdir> / "pythonX.Y" */
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int prefix_found; /* found platform independent libraries? */
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int exec_prefix_found; /* found the platform dependent libraries? */
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int warnings;
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const wchar_t *pythonpath_env;
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const wchar_t *platlibdir;
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wchar_t *argv0_path;
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wchar_t *zip_path;
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wchar_t *prefix;
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wchar_t *exec_prefix;
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} PyCalculatePath;
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static const wchar_t delimiter[2] = {DELIM, '\0'};
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static const wchar_t separator[2] = {SEP, '\0'};
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/* Get file status. Encode the path to the locale encoding. */
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static int
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_Py_wstat(const wchar_t* path, struct stat *buf)
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{
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int err;
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char *fname;
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fname = _Py_EncodeLocaleRaw(path, NULL);
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if (fname == NULL) {
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errno = EINVAL;
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return -1;
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}
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err = stat(fname, buf);
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PyMem_RawFree(fname);
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return err;
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}
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static void
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reduce(wchar_t *dir)
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{
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size_t i = wcslen(dir);
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while (i > 0 && dir[i] != SEP) {
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--i;
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}
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dir[i] = '\0';
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}
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/* Is file, not directory */
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static int
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isfile(const wchar_t *filename)
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{
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struct stat buf;
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if (_Py_wstat(filename, &buf) != 0) {
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return 0;
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}
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if (!S_ISREG(buf.st_mode)) {
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return 0;
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}
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return 1;
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}
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/* Is executable file */
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static int
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isxfile(const wchar_t *filename)
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{
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struct stat buf;
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if (_Py_wstat(filename, &buf) != 0) {
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return 0;
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}
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if (!S_ISREG(buf.st_mode)) {
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return 0;
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}
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if ((buf.st_mode & 0111) == 0) {
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return 0;
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}
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return 1;
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}
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/* Is directory */
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static int
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isdir(const wchar_t *filename)
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{
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struct stat buf;
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if (_Py_wstat(filename, &buf) != 0) {
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return 0;
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}
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if (!S_ISDIR(buf.st_mode)) {
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return 0;
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}
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return 1;
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}
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/* Add a path component, by appending stuff to buffer.
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buflen: 'buffer' length in characters including trailing NUL.
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If path2 is empty:
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- if path doesn't end with SEP and is not empty, add SEP to path
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- otherwise, do nothing. */
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static PyStatus
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joinpath(wchar_t *path, const wchar_t *path2, size_t path_len)
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{
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size_t n;
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if (!_Py_isabs(path2)) {
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n = wcslen(path);
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if (n >= path_len) {
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return PATHLEN_ERR();
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}
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if (n > 0 && path[n-1] != SEP) {
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path[n++] = SEP;
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}
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}
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else {
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n = 0;
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}
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size_t k = wcslen(path2);
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if (n + k >= path_len) {
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return PATHLEN_ERR();
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}
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wcsncpy(path + n, path2, k);
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path[n + k] = '\0';
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return _PyStatus_OK();
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}
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static wchar_t*
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substring(const wchar_t *str, size_t len)
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{
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wchar_t *substr = PyMem_RawMalloc((len + 1) * sizeof(wchar_t));
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if (substr == NULL) {
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return NULL;
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}
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if (len) {
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memcpy(substr, str, len * sizeof(wchar_t));
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}
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substr[len] = L'\0';
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return substr;
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}
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static wchar_t*
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joinpath2(const wchar_t *path, const wchar_t *path2)
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{
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if (_Py_isabs(path2)) {
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return _PyMem_RawWcsdup(path2);
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}
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size_t len = wcslen(path);
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int add_sep = (len > 0 && path[len - 1] != SEP);
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len += add_sep;
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len += wcslen(path2);
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wchar_t *new_path = PyMem_RawMalloc((len + 1) * sizeof(wchar_t));
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if (new_path == NULL) {
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return NULL;
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}
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wcscpy(new_path, path);
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if (add_sep) {
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wcscat(new_path, separator);
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}
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wcscat(new_path, path2);
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return new_path;
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}
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static inline int
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safe_wcscpy(wchar_t *dst, const wchar_t *src, size_t n)
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{
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size_t srclen = wcslen(src);
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if (n <= srclen) {
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dst[0] = L'\0';
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return -1;
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}
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memcpy(dst, src, (srclen + 1) * sizeof(wchar_t));
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return 0;
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}
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/* copy_absolute requires that path be allocated at least
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'abs_path_len' characters (including trailing NUL). */
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static PyStatus
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copy_absolute(wchar_t *abs_path, const wchar_t *path, size_t abs_path_len)
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{
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if (_Py_isabs(path)) {
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if (safe_wcscpy(abs_path, path, abs_path_len) < 0) {
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return PATHLEN_ERR();
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}
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}
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else {
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if (!_Py_wgetcwd(abs_path, abs_path_len)) {
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/* unable to get the current directory */
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if (safe_wcscpy(abs_path, path, abs_path_len) < 0) {
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return PATHLEN_ERR();
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}
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return _PyStatus_OK();
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}
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if (path[0] == '.' && path[1] == SEP) {
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path += 2;
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}
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PyStatus status = joinpath(abs_path, path, abs_path_len);
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if (_PyStatus_EXCEPTION(status)) {
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return status;
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}
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}
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return _PyStatus_OK();
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}
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/* path_len: path length in characters including trailing NUL */
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static PyStatus
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absolutize(wchar_t **path_p)
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{
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assert(!_Py_isabs(*path_p));
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wchar_t abs_path[MAXPATHLEN+1];
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wchar_t *path = *path_p;
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PyStatus status = copy_absolute(abs_path, path, Py_ARRAY_LENGTH(abs_path));
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if (_PyStatus_EXCEPTION(status)) {
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return status;
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}
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PyMem_RawFree(*path_p);
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*path_p = _PyMem_RawWcsdup(abs_path);
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if (*path_p == NULL) {
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return _PyStatus_NO_MEMORY();
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}
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return _PyStatus_OK();
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}
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/* Is module -- check for .pyc too */
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static PyStatus
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ismodule(const wchar_t *path, int *result)
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{
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wchar_t *filename = joinpath2(path, LANDMARK);
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if (filename == NULL) {
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return _PyStatus_NO_MEMORY();
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}
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if (isfile(filename)) {
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PyMem_RawFree(filename);
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*result = 1;
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return _PyStatus_OK();
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}
|
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|
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/* Check for the compiled version of prefix. */
|
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size_t len = wcslen(filename);
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wchar_t *pyc = PyMem_RawMalloc((len + 2) * sizeof(wchar_t));
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if (pyc == NULL) {
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PyMem_RawFree(filename);
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return _PyStatus_NO_MEMORY();
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}
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memcpy(pyc, filename, len * sizeof(wchar_t));
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pyc[len] = L'c';
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pyc[len + 1] = L'\0';
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*result = isfile(pyc);
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PyMem_RawFree(filename);
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PyMem_RawFree(pyc);
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return _PyStatus_OK();
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}
|
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|
|
|
|
#if defined(__CYGWIN__) || defined(__MINGW32__)
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#ifndef EXE_SUFFIX
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#define EXE_SUFFIX L".exe"
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#endif
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|
|
/* pathlen: 'path' length in characters including trailing NUL */
|
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static PyStatus
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add_exe_suffix(wchar_t **progpath_p)
|
|
{
|
|
wchar_t *progpath = *progpath_p;
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|
|
/* Check for already have an executable suffix */
|
|
size_t n = wcslen(progpath);
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size_t s = wcslen(EXE_SUFFIX);
|
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if (wcsncasecmp(EXE_SUFFIX, progpath + n - s, s) == 0) {
|
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return _PyStatus_OK();
|
|
}
|
|
|
|
wchar_t *progpath2 = PyMem_RawMalloc((n + s + 1) * sizeof(wchar_t));
|
|
if (progpath2 == NULL) {
|
|
return _PyStatus_NO_MEMORY();
|
|
}
|
|
|
|
memcpy(progpath2, progpath, n * sizeof(wchar_t));
|
|
memcpy(progpath2 + n, EXE_SUFFIX, s * sizeof(wchar_t));
|
|
progpath2[n+s] = L'\0';
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|
|
|
if (isxfile(progpath2)) {
|
|
PyMem_RawFree(*progpath_p);
|
|
*progpath_p = progpath2;
|
|
}
|
|
else {
|
|
PyMem_RawFree(progpath2);
|
|
}
|
|
return _PyStatus_OK();
|
|
}
|
|
#endif
|
|
|
|
|
|
/* search_for_prefix requires that argv0_path be no more than MAXPATHLEN
|
|
bytes long.
|
|
*/
|
|
static PyStatus
|
|
search_for_prefix(PyCalculatePath *calculate, _PyPathConfig *pathconfig,
|
|
wchar_t *prefix, size_t prefix_len, int *found)
|
|
{
|
|
PyStatus status;
|
|
|
|
/* If PYTHONHOME is set, we believe it unconditionally */
|
|
if (pathconfig->home) {
|
|
/* Path: <home> / <lib_python> */
|
|
if (safe_wcscpy(prefix, pathconfig->home, prefix_len) < 0) {
|
|
return PATHLEN_ERR();
|
|
}
|
|
wchar_t *delim = wcschr(prefix, DELIM);
|
|
if (delim) {
|
|
*delim = L'\0';
|
|
}
|
|
status = joinpath(prefix, calculate->lib_python, prefix_len);
|
|
if (_PyStatus_EXCEPTION(status)) {
|
|
return status;
|
|
}
|
|
*found = 1;
|
|
return _PyStatus_OK();
|
|
}
|
|
|
|
/* Check to see if argv0_path is in the build directory
|
|
|
|
Path: <argv0_path> / <BUILD_LANDMARK define> */
|
|
wchar_t *path = joinpath2(calculate->argv0_path, BUILD_LANDMARK);
|
|
if (path == NULL) {
|
|
return _PyStatus_NO_MEMORY();
|
|
}
|
|
|
|
int is_build_dir = isfile(path);
|
|
PyMem_RawFree(path);
|
|
|
|
if (is_build_dir) {
|
|
/* argv0_path is the build directory (BUILD_LANDMARK exists),
|
|
now also check LANDMARK using ismodule(). */
|
|
|
|
/* Path: <argv0_path> / <VPATH macro> / Lib */
|
|
/* or if VPATH is empty: <argv0_path> / Lib */
|
|
if (safe_wcscpy(prefix, calculate->argv0_path, prefix_len) < 0) {
|
|
return PATHLEN_ERR();
|
|
}
|
|
|
|
status = joinpath(prefix, calculate->vpath_macro, prefix_len);
|
|
if (_PyStatus_EXCEPTION(status)) {
|
|
return status;
|
|
}
|
|
|
|
status = joinpath(prefix, L"Lib", prefix_len);
|
|
if (_PyStatus_EXCEPTION(status)) {
|
|
return status;
|
|
}
|
|
|
|
int module;
|
|
status = ismodule(prefix, &module);
|
|
if (_PyStatus_EXCEPTION(status)) {
|
|
return status;
|
|
}
|
|
if (module) {
|
|
/* BUILD_LANDMARK and LANDMARK found */
|
|
*found = -1;
|
|
return _PyStatus_OK();
|
|
}
|
|
}
|
|
|
|
/* Search from argv0_path, until root is found */
|
|
status = copy_absolute(prefix, calculate->argv0_path, prefix_len);
|
|
if (_PyStatus_EXCEPTION(status)) {
|
|
return status;
|
|
}
|
|
|
|
do {
|
|
/* Path: <argv0_path or substring> / <lib_python> / LANDMARK */
|
|
size_t n = wcslen(prefix);
|
|
status = joinpath(prefix, calculate->lib_python, prefix_len);
|
|
if (_PyStatus_EXCEPTION(status)) {
|
|
return status;
|
|
}
|
|
|
|
int module;
|
|
status = ismodule(prefix, &module);
|
|
if (_PyStatus_EXCEPTION(status)) {
|
|
return status;
|
|
}
|
|
if (module) {
|
|
*found = 1;
|
|
return _PyStatus_OK();
|
|
}
|
|
prefix[n] = L'\0';
|
|
reduce(prefix);
|
|
} while (prefix[0]);
|
|
|
|
/* Look at configure's PREFIX.
|
|
Path: <PREFIX macro> / <lib_python> / LANDMARK */
|
|
if (safe_wcscpy(prefix, calculate->prefix_macro, prefix_len) < 0) {
|
|
return PATHLEN_ERR();
|
|
}
|
|
status = joinpath(prefix, calculate->lib_python, prefix_len);
|
|
if (_PyStatus_EXCEPTION(status)) {
|
|
return status;
|
|
}
|
|
|
|
int module;
|
|
status = ismodule(prefix, &module);
|
|
if (_PyStatus_EXCEPTION(status)) {
|
|
return status;
|
|
}
|
|
if (module) {
|
|
*found = 1;
|
|
return _PyStatus_OK();
|
|
}
|
|
|
|
/* Fail */
|
|
*found = 0;
|
|
return _PyStatus_OK();
|
|
}
|
|
|
|
|
|
static PyStatus
|
|
calculate_prefix(PyCalculatePath *calculate, _PyPathConfig *pathconfig)
|
|
{
|
|
wchar_t prefix[MAXPATHLEN+1];
|
|
memset(prefix, 0, sizeof(prefix));
|
|
size_t prefix_len = Py_ARRAY_LENGTH(prefix);
|
|
|
|
PyStatus status;
|
|
status = search_for_prefix(calculate, pathconfig,
|
|
prefix, prefix_len,
|
|
&calculate->prefix_found);
|
|
if (_PyStatus_EXCEPTION(status)) {
|
|
return status;
|
|
}
|
|
|
|
if (!calculate->prefix_found) {
|
|
if (calculate->warnings) {
|
|
fprintf(stderr,
|
|
"Could not find platform independent libraries <prefix>\n");
|
|
}
|
|
|
|
calculate->prefix = joinpath2(calculate->prefix_macro,
|
|
calculate->lib_python);
|
|
}
|
|
else {
|
|
calculate->prefix = _PyMem_RawWcsdup(prefix);
|
|
}
|
|
|
|
if (calculate->prefix == NULL) {
|
|
return _PyStatus_NO_MEMORY();
|
|
}
|
|
return _PyStatus_OK();
|
|
}
|
|
|
|
|
|
static PyStatus
|
|
calculate_set_prefix(PyCalculatePath *calculate, _PyPathConfig *pathconfig)
|
|
{
|
|
/* Reduce prefix and exec_prefix to their essence,
|
|
* e.g. /usr/local/lib/python1.5 is reduced to /usr/local.
|
|
* If we're loading relative to the build directory,
|
|
* return the compiled-in defaults instead.
|
|
*/
|
|
if (calculate->prefix_found > 0) {
|
|
wchar_t *prefix = _PyMem_RawWcsdup(calculate->prefix);
|
|
if (prefix == NULL) {
|
|
return _PyStatus_NO_MEMORY();
|
|
}
|
|
|
|
reduce(prefix);
|
|
reduce(prefix);
|
|
if (prefix[0]) {
|
|
pathconfig->prefix = prefix;
|
|
}
|
|
else {
|
|
PyMem_RawFree(prefix);
|
|
|
|
/* The prefix is the root directory, but reduce() chopped
|
|
off the "/". */
|
|
pathconfig->prefix = _PyMem_RawWcsdup(separator);
|
|
if (pathconfig->prefix == NULL) {
|
|
return _PyStatus_NO_MEMORY();
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
pathconfig->prefix = _PyMem_RawWcsdup(calculate->prefix_macro);
|
|
if (pathconfig->prefix == NULL) {
|
|
return _PyStatus_NO_MEMORY();
|
|
}
|
|
}
|
|
return _PyStatus_OK();
|
|
}
|
|
|
|
|
|
static PyStatus
|
|
calculate_pybuilddir(const wchar_t *argv0_path,
|
|
wchar_t *exec_prefix, size_t exec_prefix_len,
|
|
int *found)
|
|
{
|
|
PyStatus status;
|
|
|
|
/* Check to see if argv[0] is in the build directory. "pybuilddir.txt"
|
|
is written by setup.py and contains the relative path to the location
|
|
of shared library modules.
|
|
|
|
Filename: <argv0_path> / "pybuilddir.txt" */
|
|
wchar_t *filename = joinpath2(argv0_path, L"pybuilddir.txt");
|
|
if (filename == NULL) {
|
|
return _PyStatus_NO_MEMORY();
|
|
}
|
|
|
|
FILE *fp = _Py_wfopen(filename, L"rb");
|
|
PyMem_RawFree(filename);
|
|
if (fp == NULL) {
|
|
errno = 0;
|
|
return _PyStatus_OK();
|
|
}
|
|
|
|
char buf[MAXPATHLEN + 1];
|
|
size_t n = fread(buf, 1, Py_ARRAY_LENGTH(buf) - 1, fp);
|
|
buf[n] = '\0';
|
|
fclose(fp);
|
|
|
|
size_t dec_len;
|
|
wchar_t *pybuilddir = _Py_DecodeUTF8_surrogateescape(buf, n, &dec_len);
|
|
if (!pybuilddir) {
|
|
return DECODE_LOCALE_ERR("pybuilddir.txt", dec_len);
|
|
}
|
|
|
|
/* Path: <argv0_path> / <pybuilddir content> */
|
|
if (safe_wcscpy(exec_prefix, argv0_path, exec_prefix_len) < 0) {
|
|
PyMem_RawFree(pybuilddir);
|
|
return PATHLEN_ERR();
|
|
}
|
|
status = joinpath(exec_prefix, pybuilddir, exec_prefix_len);
|
|
PyMem_RawFree(pybuilddir);
|
|
if (_PyStatus_EXCEPTION(status)) {
|
|
return status;
|
|
}
|
|
|
|
*found = -1;
|
|
return _PyStatus_OK();
|
|
}
|
|
|
|
|
|
/* search_for_exec_prefix requires that argv0_path be no more than
|
|
MAXPATHLEN bytes long.
|
|
*/
|
|
static PyStatus
|
|
search_for_exec_prefix(PyCalculatePath *calculate, _PyPathConfig *pathconfig,
|
|
wchar_t *exec_prefix, size_t exec_prefix_len,
|
|
int *found)
|
|
{
|
|
PyStatus status;
|
|
|
|
/* If PYTHONHOME is set, we believe it unconditionally */
|
|
if (pathconfig->home) {
|
|
/* Path: <home> / <lib_python> / "lib-dynload" */
|
|
wchar_t *delim = wcschr(pathconfig->home, DELIM);
|
|
if (delim) {
|
|
if (safe_wcscpy(exec_prefix, delim+1, exec_prefix_len) < 0) {
|
|
return PATHLEN_ERR();
|
|
}
|
|
}
|
|
else {
|
|
if (safe_wcscpy(exec_prefix, pathconfig->home, exec_prefix_len) < 0) {
|
|
return PATHLEN_ERR();
|
|
}
|
|
}
|
|
status = joinpath(exec_prefix, calculate->lib_python, exec_prefix_len);
|
|
if (_PyStatus_EXCEPTION(status)) {
|
|
return status;
|
|
}
|
|
status = joinpath(exec_prefix, L"lib-dynload", exec_prefix_len);
|
|
if (_PyStatus_EXCEPTION(status)) {
|
|
return status;
|
|
}
|
|
*found = 1;
|
|
return _PyStatus_OK();
|
|
}
|
|
|
|
/* Check for pybuilddir.txt */
|
|
assert(*found == 0);
|
|
status = calculate_pybuilddir(calculate->argv0_path,
|
|
exec_prefix, exec_prefix_len, found);
|
|
if (_PyStatus_EXCEPTION(status)) {
|
|
return status;
|
|
}
|
|
if (*found) {
|
|
return _PyStatus_OK();
|
|
}
|
|
|
|
/* Search from argv0_path, until root is found */
|
|
status = copy_absolute(exec_prefix, calculate->argv0_path, exec_prefix_len);
|
|
if (_PyStatus_EXCEPTION(status)) {
|
|
return status;
|
|
}
|
|
|
|
do {
|
|
/* Path: <argv0_path or substring> / <lib_python> / "lib-dynload" */
|
|
size_t n = wcslen(exec_prefix);
|
|
status = joinpath(exec_prefix, calculate->lib_python, exec_prefix_len);
|
|
if (_PyStatus_EXCEPTION(status)) {
|
|
return status;
|
|
}
|
|
status = joinpath(exec_prefix, L"lib-dynload", exec_prefix_len);
|
|
if (_PyStatus_EXCEPTION(status)) {
|
|
return status;
|
|
}
|
|
if (isdir(exec_prefix)) {
|
|
*found = 1;
|
|
return _PyStatus_OK();
|
|
}
|
|
exec_prefix[n] = L'\0';
|
|
reduce(exec_prefix);
|
|
} while (exec_prefix[0]);
|
|
|
|
/* Look at configure's EXEC_PREFIX.
|
|
|
|
Path: <EXEC_PREFIX macro> / <lib_python> / "lib-dynload" */
|
|
if (safe_wcscpy(exec_prefix, calculate->exec_prefix_macro, exec_prefix_len) < 0) {
|
|
return PATHLEN_ERR();
|
|
}
|
|
status = joinpath(exec_prefix, calculate->lib_python, exec_prefix_len);
|
|
if (_PyStatus_EXCEPTION(status)) {
|
|
return status;
|
|
}
|
|
status = joinpath(exec_prefix, L"lib-dynload", exec_prefix_len);
|
|
if (_PyStatus_EXCEPTION(status)) {
|
|
return status;
|
|
}
|
|
if (isdir(exec_prefix)) {
|
|
*found = 1;
|
|
return _PyStatus_OK();
|
|
}
|
|
|
|
/* Fail */
|
|
*found = 0;
|
|
return _PyStatus_OK();
|
|
}
|
|
|
|
|
|
static PyStatus
|
|
calculate_exec_prefix(PyCalculatePath *calculate, _PyPathConfig *pathconfig)
|
|
{
|
|
PyStatus status;
|
|
wchar_t exec_prefix[MAXPATHLEN+1];
|
|
memset(exec_prefix, 0, sizeof(exec_prefix));
|
|
size_t exec_prefix_len = Py_ARRAY_LENGTH(exec_prefix);
|
|
|
|
status = search_for_exec_prefix(calculate, pathconfig,
|
|
exec_prefix, exec_prefix_len,
|
|
&calculate->exec_prefix_found);
|
|
if (_PyStatus_EXCEPTION(status)) {
|
|
return status;
|
|
}
|
|
|
|
if (!calculate->exec_prefix_found) {
|
|
if (calculate->warnings) {
|
|
fprintf(stderr,
|
|
"Could not find platform dependent libraries <exec_prefix>\n");
|
|
}
|
|
|
|
/* <platlibdir> / "lib-dynload" */
|
|
wchar_t *lib_dynload = joinpath2(calculate->platlibdir,
|
|
L"lib-dynload");
|
|
if (lib_dynload == NULL) {
|
|
return _PyStatus_NO_MEMORY();
|
|
}
|
|
|
|
calculate->exec_prefix = joinpath2(calculate->exec_prefix_macro,
|
|
lib_dynload);
|
|
PyMem_RawFree(lib_dynload);
|
|
|
|
if (calculate->exec_prefix == NULL) {
|
|
return _PyStatus_NO_MEMORY();
|
|
}
|
|
}
|
|
else {
|
|
/* If we found EXEC_PREFIX do *not* reduce it! (Yet.) */
|
|
calculate->exec_prefix = _PyMem_RawWcsdup(exec_prefix);
|
|
if (calculate->exec_prefix == NULL) {
|
|
return _PyStatus_NO_MEMORY();
|
|
}
|
|
}
|
|
return _PyStatus_OK();
|
|
}
|
|
|
|
|
|
static PyStatus
|
|
calculate_set_exec_prefix(PyCalculatePath *calculate,
|
|
_PyPathConfig *pathconfig)
|
|
{
|
|
if (calculate->exec_prefix_found > 0) {
|
|
wchar_t *exec_prefix = _PyMem_RawWcsdup(calculate->exec_prefix);
|
|
if (exec_prefix == NULL) {
|
|
return _PyStatus_NO_MEMORY();
|
|
}
|
|
|
|
reduce(exec_prefix);
|
|
reduce(exec_prefix);
|
|
reduce(exec_prefix);
|
|
|
|
if (exec_prefix[0]) {
|
|
pathconfig->exec_prefix = exec_prefix;
|
|
}
|
|
else {
|
|
/* empty string: use SEP instead */
|
|
PyMem_RawFree(exec_prefix);
|
|
|
|
/* The exec_prefix is the root directory, but reduce() chopped
|
|
off the "/". */
|
|
pathconfig->exec_prefix = _PyMem_RawWcsdup(separator);
|
|
if (pathconfig->exec_prefix == NULL) {
|
|
return _PyStatus_NO_MEMORY();
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
pathconfig->exec_prefix = _PyMem_RawWcsdup(calculate->exec_prefix_macro);
|
|
if (pathconfig->exec_prefix == NULL) {
|
|
return _PyStatus_NO_MEMORY();
|
|
}
|
|
}
|
|
return _PyStatus_OK();
|
|
}
|
|
|
|
|
|
/* Similar to shutil.which().
|
|
If found, write the path into *abs_path_p. */
|
|
static PyStatus
|
|
calculate_which(const wchar_t *path_env, wchar_t *program_name,
|
|
wchar_t **abs_path_p)
|
|
{
|
|
while (1) {
|
|
wchar_t *delim = wcschr(path_env, DELIM);
|
|
wchar_t *abs_path;
|
|
|
|
if (delim) {
|
|
wchar_t *path = substring(path_env, delim - path_env);
|
|
if (path == NULL) {
|
|
return _PyStatus_NO_MEMORY();
|
|
}
|
|
abs_path = joinpath2(path, program_name);
|
|
PyMem_RawFree(path);
|
|
}
|
|
else {
|
|
abs_path = joinpath2(path_env, program_name);
|
|
}
|
|
|
|
if (abs_path == NULL) {
|
|
return _PyStatus_NO_MEMORY();
|
|
}
|
|
|
|
if (isxfile(abs_path)) {
|
|
*abs_path_p = abs_path;
|
|
return _PyStatus_OK();
|
|
}
|
|
PyMem_RawFree(abs_path);
|
|
|
|
if (!delim) {
|
|
break;
|
|
}
|
|
path_env = delim + 1;
|
|
}
|
|
|
|
/* not found */
|
|
return _PyStatus_OK();
|
|
}
|
|
|
|
|
|
#ifdef __APPLE__
|
|
static PyStatus
|
|
calculate_program_macos(wchar_t **abs_path_p)
|
|
{
|
|
char execpath[MAXPATHLEN + 1];
|
|
uint32_t nsexeclength = Py_ARRAY_LENGTH(execpath) - 1;
|
|
|
|
/* On Mac OS X, if a script uses an interpreter of the form
|
|
"#!/opt/python2.3/bin/python", the kernel only passes "python"
|
|
as argv[0], which falls through to the $PATH search below.
|
|
If /opt/python2.3/bin isn't in your path, or is near the end,
|
|
this algorithm may incorrectly find /usr/bin/python. To work
|
|
around this, we can use _NSGetExecutablePath to get a better
|
|
hint of what the intended interpreter was, although this
|
|
will fail if a relative path was used. but in that case,
|
|
absolutize() should help us out below
|
|
*/
|
|
if (_NSGetExecutablePath(execpath, &nsexeclength) != 0
|
|
|| (wchar_t)execpath[0] != SEP)
|
|
{
|
|
/* _NSGetExecutablePath() failed or the path is relative */
|
|
return _PyStatus_OK();
|
|
}
|
|
|
|
size_t len;
|
|
*abs_path_p = Py_DecodeLocale(execpath, &len);
|
|
if (*abs_path_p == NULL) {
|
|
return DECODE_LOCALE_ERR("executable path", len);
|
|
}
|
|
return _PyStatus_OK();
|
|
}
|
|
#endif /* __APPLE__ */
|
|
|
|
|
|
static PyStatus
|
|
calculate_program_impl(PyCalculatePath *calculate, _PyPathConfig *pathconfig)
|
|
{
|
|
assert(pathconfig->program_full_path == NULL);
|
|
|
|
PyStatus status;
|
|
|
|
/* If there is no slash in the argv0 path, then we have to
|
|
* assume python is on the user's $PATH, since there's no
|
|
* other way to find a directory to start the search from. If
|
|
* $PATH isn't exported, you lose.
|
|
*/
|
|
if (wcschr(pathconfig->program_name, SEP)) {
|
|
pathconfig->program_full_path = _PyMem_RawWcsdup(pathconfig->program_name);
|
|
if (pathconfig->program_full_path == NULL) {
|
|
return _PyStatus_NO_MEMORY();
|
|
}
|
|
return _PyStatus_OK();
|
|
}
|
|
|
|
#ifdef __APPLE__
|
|
wchar_t *abs_path = NULL;
|
|
status = calculate_program_macos(&abs_path);
|
|
if (_PyStatus_EXCEPTION(status)) {
|
|
return status;
|
|
}
|
|
if (abs_path) {
|
|
pathconfig->program_full_path = abs_path;
|
|
return _PyStatus_OK();
|
|
}
|
|
#endif /* __APPLE__ */
|
|
|
|
if (calculate->path_env) {
|
|
wchar_t *abs_path = NULL;
|
|
status = calculate_which(calculate->path_env, pathconfig->program_name,
|
|
&abs_path);
|
|
if (_PyStatus_EXCEPTION(status)) {
|
|
return status;
|
|
}
|
|
if (abs_path) {
|
|
pathconfig->program_full_path = abs_path;
|
|
return _PyStatus_OK();
|
|
}
|
|
}
|
|
|
|
/* In the last resort, use an empty string */
|
|
pathconfig->program_full_path = _PyMem_RawWcsdup(L"");
|
|
if (pathconfig->program_full_path == NULL) {
|
|
return _PyStatus_NO_MEMORY();
|
|
}
|
|
return _PyStatus_OK();
|
|
}
|
|
|
|
|
|
/* Calculate pathconfig->program_full_path */
|
|
static PyStatus
|
|
calculate_program(PyCalculatePath *calculate, _PyPathConfig *pathconfig)
|
|
{
|
|
PyStatus status;
|
|
|
|
status = calculate_program_impl(calculate, pathconfig);
|
|
if (_PyStatus_EXCEPTION(status)) {
|
|
return status;
|
|
}
|
|
|
|
if (pathconfig->program_full_path[0] != '\0') {
|
|
/* program_full_path is not empty */
|
|
|
|
/* Make sure that program_full_path is an absolute path */
|
|
if (!_Py_isabs(pathconfig->program_full_path)) {
|
|
status = absolutize(&pathconfig->program_full_path);
|
|
if (_PyStatus_EXCEPTION(status)) {
|
|
return status;
|
|
}
|
|
}
|
|
|
|
#if defined(__CYGWIN__) || defined(__MINGW32__)
|
|
/* For these platforms it is necessary to ensure that the .exe suffix
|
|
* is appended to the filename, otherwise there is potential for
|
|
* sys.executable to return the name of a directory under the same
|
|
* path (bpo-28441).
|
|
*/
|
|
status = add_exe_suffix(&pathconfig->program_full_path);
|
|
if (_PyStatus_EXCEPTION(status)) {
|
|
return status;
|
|
}
|
|
#endif
|
|
}
|
|
return _PyStatus_OK();
|
|
}
|
|
|
|
|
|
#if HAVE_READLINK
|
|
static PyStatus
|
|
resolve_symlinks(wchar_t **path_p)
|
|
{
|
|
wchar_t new_path[MAXPATHLEN + 1];
|
|
const size_t new_path_len = Py_ARRAY_LENGTH(new_path);
|
|
unsigned int nlink = 0;
|
|
|
|
while (1) {
|
|
int linklen = _Py_wreadlink(*path_p, new_path, new_path_len);
|
|
if (linklen == -1) {
|
|
/* not a symbolic link: we are done */
|
|
break;
|
|
}
|
|
|
|
if (_Py_isabs(new_path)) {
|
|
PyMem_RawFree(*path_p);
|
|
*path_p = _PyMem_RawWcsdup(new_path);
|
|
if (*path_p == NULL) {
|
|
return _PyStatus_NO_MEMORY();
|
|
}
|
|
}
|
|
else {
|
|
/* new_path is relative to path */
|
|
reduce(*path_p);
|
|
|
|
wchar_t *abs_path = joinpath2(*path_p, new_path);
|
|
if (abs_path == NULL) {
|
|
return _PyStatus_NO_MEMORY();
|
|
}
|
|
|
|
PyMem_RawFree(*path_p);
|
|
*path_p = abs_path;
|
|
}
|
|
|
|
nlink++;
|
|
/* 40 is the Linux kernel 4.2 limit */
|
|
if (nlink >= 40) {
|
|
return _PyStatus_ERR("maximum number of symbolic links reached");
|
|
}
|
|
}
|
|
return _PyStatus_OK();
|
|
}
|
|
#endif /* HAVE_READLINK */
|
|
|
|
|
|
#ifdef WITH_NEXT_FRAMEWORK
|
|
static PyStatus
|
|
calculate_argv0_path_framework(PyCalculatePath *calculate, _PyPathConfig *pathconfig)
|
|
{
|
|
NSModule pythonModule;
|
|
|
|
/* On Mac OS X we have a special case if we're running from a framework.
|
|
This is because the python home should be set relative to the library,
|
|
which is in the framework, not relative to the executable, which may
|
|
be outside of the framework. Except when we're in the build
|
|
directory... */
|
|
pythonModule = NSModuleForSymbol(NSLookupAndBindSymbol("_Py_Initialize"));
|
|
|
|
/* Use dylib functions to find out where the framework was loaded from */
|
|
const char* modPath = NSLibraryNameForModule(pythonModule);
|
|
if (modPath == NULL) {
|
|
return _PyStatus_OK();
|
|
}
|
|
|
|
/* We're in a framework.
|
|
See if we might be in the build directory. The framework in the
|
|
build directory is incomplete, it only has the .dylib and a few
|
|
needed symlinks, it doesn't have the Lib directories and such.
|
|
If we're running with the framework from the build directory we must
|
|
be running the interpreter in the build directory, so we use the
|
|
build-directory-specific logic to find Lib and such. */
|
|
size_t len;
|
|
wchar_t* wbuf = Py_DecodeLocale(modPath, &len);
|
|
if (wbuf == NULL) {
|
|
return DECODE_LOCALE_ERR("framework location", len);
|
|
}
|
|
|
|
/* Path: reduce(modPath) / lib_python / LANDMARK */
|
|
PyStatus status;
|
|
|
|
wchar_t *parent = _PyMem_RawWcsdup(wbuf);
|
|
if (parent == NULL) {
|
|
status = _PyStatus_NO_MEMORY();
|
|
goto done;
|
|
}
|
|
|
|
reduce(parent);
|
|
wchar_t *lib_python = joinpath2(parent, calculate->lib_python);
|
|
PyMem_RawFree(parent);
|
|
|
|
if (lib_python == NULL) {
|
|
status = _PyStatus_NO_MEMORY();
|
|
goto done;
|
|
}
|
|
|
|
int module;
|
|
status = ismodule(lib_python, &module);
|
|
PyMem_RawFree(lib_python);
|
|
|
|
if (_PyStatus_EXCEPTION(status)) {
|
|
goto done;
|
|
}
|
|
if (!module) {
|
|
/* We are in the build directory so use the name of the
|
|
executable - we know that the absolute path is passed */
|
|
PyMem_RawFree(calculate->argv0_path);
|
|
calculate->argv0_path = _PyMem_RawWcsdup(pathconfig->program_full_path);
|
|
if (calculate->argv0_path == NULL) {
|
|
status = _PyStatus_NO_MEMORY();
|
|
goto done;
|
|
}
|
|
|
|
status = _PyStatus_OK();
|
|
goto done;
|
|
}
|
|
|
|
/* Use the location of the library as argv0_path */
|
|
PyMem_RawFree(calculate->argv0_path);
|
|
calculate->argv0_path = wbuf;
|
|
return _PyStatus_OK();
|
|
|
|
done:
|
|
PyMem_RawFree(wbuf);
|
|
return status;
|
|
}
|
|
#endif
|
|
|
|
|
|
static PyStatus
|
|
calculate_argv0_path(PyCalculatePath *calculate,
|
|
_PyPathConfig *pathconfig)
|
|
{
|
|
PyStatus status;
|
|
|
|
calculate->argv0_path = _PyMem_RawWcsdup(pathconfig->program_full_path);
|
|
if (calculate->argv0_path == NULL) {
|
|
return _PyStatus_NO_MEMORY();
|
|
}
|
|
|
|
#ifdef WITH_NEXT_FRAMEWORK
|
|
status = calculate_argv0_path_framework(calculate, pathconfig);
|
|
if (_PyStatus_EXCEPTION(status)) {
|
|
return status;
|
|
}
|
|
#endif
|
|
|
|
status = resolve_symlinks(&calculate->argv0_path);
|
|
if (_PyStatus_EXCEPTION(status)) {
|
|
return status;
|
|
}
|
|
|
|
reduce(calculate->argv0_path);
|
|
|
|
return _PyStatus_OK();
|
|
}
|
|
|
|
|
|
static PyStatus
|
|
calculate_open_pyenv(PyCalculatePath *calculate, FILE **env_file_p)
|
|
{
|
|
*env_file_p = NULL;
|
|
|
|
const wchar_t *env_cfg = L"pyvenv.cfg";
|
|
|
|
/* Filename: <argv0_path> / "pyvenv.cfg" */
|
|
wchar_t *filename = joinpath2(calculate->argv0_path, env_cfg);
|
|
if (filename == NULL) {
|
|
return _PyStatus_NO_MEMORY();
|
|
}
|
|
|
|
*env_file_p = _Py_wfopen(filename, L"r");
|
|
PyMem_RawFree(filename);
|
|
|
|
if (*env_file_p != NULL) {
|
|
return _PyStatus_OK();
|
|
|
|
}
|
|
|
|
/* fopen() failed: reset errno */
|
|
errno = 0;
|
|
|
|
/* Path: <basename(argv0_path)> / "pyvenv.cfg" */
|
|
wchar_t *parent = _PyMem_RawWcsdup(calculate->argv0_path);
|
|
if (parent == NULL) {
|
|
return _PyStatus_NO_MEMORY();
|
|
}
|
|
reduce(parent);
|
|
|
|
filename = joinpath2(parent, env_cfg);
|
|
PyMem_RawFree(parent);
|
|
if (filename == NULL) {
|
|
return _PyStatus_NO_MEMORY();
|
|
}
|
|
|
|
*env_file_p = _Py_wfopen(filename, L"r");
|
|
PyMem_RawFree(filename);
|
|
|
|
if (*env_file_p == NULL) {
|
|
/* fopen() failed: reset errno */
|
|
errno = 0;
|
|
}
|
|
return _PyStatus_OK();
|
|
}
|
|
|
|
|
|
/* Search for an "pyvenv.cfg" environment configuration file, first in the
|
|
executable's directory and then in the parent directory.
|
|
If found, open it for use when searching for prefixes.
|
|
|
|
Write the 'home' variable of pyvenv.cfg into calculate->argv0_path. */
|
|
static PyStatus
|
|
calculate_read_pyenv(PyCalculatePath *calculate)
|
|
{
|
|
PyStatus status;
|
|
FILE *env_file = NULL;
|
|
|
|
status = calculate_open_pyenv(calculate, &env_file);
|
|
if (_PyStatus_EXCEPTION(status)) {
|
|
return status;
|
|
}
|
|
if (env_file == NULL) {
|
|
/* pyvenv.cfg not found */
|
|
return _PyStatus_OK();
|
|
}
|
|
|
|
/* Look for a 'home' variable and set argv0_path to it, if found */
|
|
wchar_t *home = NULL;
|
|
status = _Py_FindEnvConfigValue(env_file, L"home", &home);
|
|
if (_PyStatus_EXCEPTION(status)) {
|
|
fclose(env_file);
|
|
return status;
|
|
}
|
|
|
|
if (home) {
|
|
PyMem_RawFree(calculate->argv0_path);
|
|
calculate->argv0_path = home;
|
|
}
|
|
fclose(env_file);
|
|
return _PyStatus_OK();
|
|
}
|
|
|
|
|
|
static PyStatus
|
|
calculate_zip_path(PyCalculatePath *calculate)
|
|
{
|
|
PyStatus res;
|
|
|
|
/* Path: <platlibdir> / "pythonXY.zip" */
|
|
wchar_t *path = joinpath2(calculate->platlibdir,
|
|
L"python" Py_STRINGIFY(PY_MAJOR_VERSION) Py_STRINGIFY(PY_MINOR_VERSION)
|
|
L".zip");
|
|
if (path == NULL) {
|
|
return _PyStatus_NO_MEMORY();
|
|
}
|
|
|
|
if (calculate->prefix_found > 0) {
|
|
/* Use the reduced prefix returned by Py_GetPrefix()
|
|
|
|
Path: <basename(basename(prefix))> / <platlibdir> / "pythonXY.zip" */
|
|
wchar_t *parent = _PyMem_RawWcsdup(calculate->prefix);
|
|
if (parent == NULL) {
|
|
res = _PyStatus_NO_MEMORY();
|
|
goto done;
|
|
}
|
|
reduce(parent);
|
|
reduce(parent);
|
|
calculate->zip_path = joinpath2(parent, path);
|
|
PyMem_RawFree(parent);
|
|
}
|
|
else {
|
|
calculate->zip_path = joinpath2(calculate->prefix_macro, path);
|
|
}
|
|
|
|
if (calculate->zip_path == NULL) {
|
|
res = _PyStatus_NO_MEMORY();
|
|
goto done;
|
|
}
|
|
|
|
/* Replace "00" with version */
|
|
size_t len = wcslen(calculate->zip_path);
|
|
calculate->zip_path[len - 6] = VERSION[0];
|
|
calculate->zip_path[len - 5] = VERSION[2];
|
|
|
|
res = _PyStatus_OK();
|
|
|
|
done:
|
|
PyMem_RawFree(path);
|
|
return res;
|
|
}
|
|
|
|
|
|
static PyStatus
|
|
calculate_module_search_path(PyCalculatePath *calculate,
|
|
_PyPathConfig *pathconfig)
|
|
{
|
|
/* Calculate size of return buffer */
|
|
size_t bufsz = 0;
|
|
if (calculate->pythonpath_env != NULL) {
|
|
bufsz += wcslen(calculate->pythonpath_env) + 1;
|
|
}
|
|
|
|
wchar_t *defpath = calculate->pythonpath_macro;
|
|
size_t prefixsz = wcslen(calculate->prefix) + 1;
|
|
while (1) {
|
|
wchar_t *delim = wcschr(defpath, DELIM);
|
|
|
|
if (!_Py_isabs(defpath)) {
|
|
/* Paths are relative to prefix */
|
|
bufsz += prefixsz;
|
|
}
|
|
|
|
if (delim) {
|
|
bufsz += delim - defpath + 1;
|
|
}
|
|
else {
|
|
bufsz += wcslen(defpath) + 1;
|
|
break;
|
|
}
|
|
defpath = delim + 1;
|
|
}
|
|
|
|
bufsz += wcslen(calculate->zip_path) + 1;
|
|
bufsz += wcslen(calculate->exec_prefix) + 1;
|
|
|
|
/* Allocate the buffer */
|
|
wchar_t *buf = PyMem_RawMalloc(bufsz * sizeof(wchar_t));
|
|
if (buf == NULL) {
|
|
return _PyStatus_NO_MEMORY();
|
|
}
|
|
buf[0] = '\0';
|
|
|
|
/* Run-time value of $PYTHONPATH goes first */
|
|
if (calculate->pythonpath_env) {
|
|
wcscpy(buf, calculate->pythonpath_env);
|
|
wcscat(buf, delimiter);
|
|
}
|
|
|
|
/* Next is the default zip path */
|
|
wcscat(buf, calculate->zip_path);
|
|
wcscat(buf, delimiter);
|
|
|
|
/* Next goes merge of compile-time $PYTHONPATH with
|
|
* dynamically located prefix.
|
|
*/
|
|
defpath = calculate->pythonpath_macro;
|
|
while (1) {
|
|
wchar_t *delim = wcschr(defpath, DELIM);
|
|
|
|
if (!_Py_isabs(defpath)) {
|
|
wcscat(buf, calculate->prefix);
|
|
if (prefixsz >= 2 && calculate->prefix[prefixsz - 2] != SEP &&
|
|
defpath[0] != (delim ? DELIM : L'\0'))
|
|
{
|
|
/* not empty */
|
|
wcscat(buf, separator);
|
|
}
|
|
}
|
|
|
|
if (delim) {
|
|
size_t len = delim - defpath + 1;
|
|
size_t end = wcslen(buf) + len;
|
|
wcsncat(buf, defpath, len);
|
|
buf[end] = '\0';
|
|
}
|
|
else {
|
|
wcscat(buf, defpath);
|
|
break;
|
|
}
|
|
defpath = delim + 1;
|
|
}
|
|
wcscat(buf, delimiter);
|
|
|
|
/* Finally, on goes the directory for dynamic-load modules */
|
|
wcscat(buf, calculate->exec_prefix);
|
|
|
|
pathconfig->module_search_path = buf;
|
|
return _PyStatus_OK();
|
|
}
|
|
|
|
|
|
static PyStatus
|
|
calculate_init(PyCalculatePath *calculate, const PyConfig *config)
|
|
{
|
|
size_t len;
|
|
|
|
calculate->warnings = config->pathconfig_warnings;
|
|
calculate->pythonpath_env = config->pythonpath_env;
|
|
calculate->platlibdir = config->platlibdir;
|
|
|
|
const char *path = getenv("PATH");
|
|
if (path) {
|
|
calculate->path_env = Py_DecodeLocale(path, &len);
|
|
if (!calculate->path_env) {
|
|
return DECODE_LOCALE_ERR("PATH environment variable", len);
|
|
}
|
|
}
|
|
|
|
/* Decode macros */
|
|
calculate->pythonpath_macro = Py_DecodeLocale(PYTHONPATH, &len);
|
|
if (!calculate->pythonpath_macro) {
|
|
return DECODE_LOCALE_ERR("PYTHONPATH macro", len);
|
|
}
|
|
calculate->prefix_macro = Py_DecodeLocale(PREFIX, &len);
|
|
if (!calculate->prefix_macro) {
|
|
return DECODE_LOCALE_ERR("PREFIX macro", len);
|
|
}
|
|
calculate->exec_prefix_macro = Py_DecodeLocale(EXEC_PREFIX, &len);
|
|
if (!calculate->exec_prefix_macro) {
|
|
return DECODE_LOCALE_ERR("EXEC_PREFIX macro", len);
|
|
}
|
|
calculate->vpath_macro = Py_DecodeLocale(VPATH, &len);
|
|
if (!calculate->vpath_macro) {
|
|
return DECODE_LOCALE_ERR("VPATH macro", len);
|
|
}
|
|
|
|
// <platlibdir> / "pythonX.Y"
|
|
wchar_t *pyversion = Py_DecodeLocale("python" VERSION, &len);
|
|
if (!pyversion) {
|
|
return DECODE_LOCALE_ERR("VERSION macro", len);
|
|
}
|
|
calculate->lib_python = joinpath2(config->platlibdir, pyversion);
|
|
PyMem_RawFree(pyversion);
|
|
if (calculate->lib_python == NULL) {
|
|
return _PyStatus_NO_MEMORY();
|
|
}
|
|
|
|
return _PyStatus_OK();
|
|
}
|
|
|
|
|
|
static void
|
|
calculate_free(PyCalculatePath *calculate)
|
|
{
|
|
PyMem_RawFree(calculate->pythonpath_macro);
|
|
PyMem_RawFree(calculate->prefix_macro);
|
|
PyMem_RawFree(calculate->exec_prefix_macro);
|
|
PyMem_RawFree(calculate->vpath_macro);
|
|
PyMem_RawFree(calculate->lib_python);
|
|
PyMem_RawFree(calculate->path_env);
|
|
PyMem_RawFree(calculate->zip_path);
|
|
PyMem_RawFree(calculate->argv0_path);
|
|
PyMem_RawFree(calculate->prefix);
|
|
PyMem_RawFree(calculate->exec_prefix);
|
|
}
|
|
|
|
|
|
static PyStatus
|
|
calculate_path(PyCalculatePath *calculate, _PyPathConfig *pathconfig)
|
|
{
|
|
PyStatus status;
|
|
|
|
if (pathconfig->program_full_path == NULL) {
|
|
status = calculate_program(calculate, pathconfig);
|
|
if (_PyStatus_EXCEPTION(status)) {
|
|
return status;
|
|
}
|
|
}
|
|
|
|
status = calculate_argv0_path(calculate, pathconfig);
|
|
if (_PyStatus_EXCEPTION(status)) {
|
|
return status;
|
|
}
|
|
|
|
/* If a pyvenv.cfg configure file is found,
|
|
argv0_path is overriden with its 'home' variable. */
|
|
status = calculate_read_pyenv(calculate);
|
|
if (_PyStatus_EXCEPTION(status)) {
|
|
return status;
|
|
}
|
|
|
|
status = calculate_prefix(calculate, pathconfig);
|
|
if (_PyStatus_EXCEPTION(status)) {
|
|
return status;
|
|
}
|
|
|
|
status = calculate_zip_path(calculate);
|
|
if (_PyStatus_EXCEPTION(status)) {
|
|
return status;
|
|
}
|
|
|
|
status = calculate_exec_prefix(calculate, pathconfig);
|
|
if (_PyStatus_EXCEPTION(status)) {
|
|
return status;
|
|
}
|
|
|
|
if ((!calculate->prefix_found || !calculate->exec_prefix_found)
|
|
&& calculate->warnings)
|
|
{
|
|
fprintf(stderr,
|
|
"Consider setting $PYTHONHOME to <prefix>[:<exec_prefix>]\n");
|
|
}
|
|
|
|
if (pathconfig->module_search_path == NULL) {
|
|
status = calculate_module_search_path(calculate, pathconfig);
|
|
if (_PyStatus_EXCEPTION(status)) {
|
|
return status;
|
|
}
|
|
}
|
|
|
|
if (pathconfig->prefix == NULL) {
|
|
status = calculate_set_prefix(calculate, pathconfig);
|
|
if (_PyStatus_EXCEPTION(status)) {
|
|
return status;
|
|
}
|
|
}
|
|
|
|
if (pathconfig->exec_prefix == NULL) {
|
|
status = calculate_set_exec_prefix(calculate, pathconfig);
|
|
if (_PyStatus_EXCEPTION(status)) {
|
|
return status;
|
|
}
|
|
}
|
|
return _PyStatus_OK();
|
|
}
|
|
|
|
|
|
/* Calculate the Python path configuration.
|
|
|
|
Inputs:
|
|
|
|
- PATH environment variable
|
|
- Macros: PYTHONPATH, PREFIX, EXEC_PREFIX, VERSION (ex: "3.9").
|
|
PREFIX and EXEC_PREFIX are generated by the configure script.
|
|
PYTHONPATH macro is the default search path.
|
|
- pybuilddir.txt file
|
|
- pyvenv.cfg configuration file
|
|
- PyConfig fields ('config' function argument):
|
|
|
|
- pathconfig_warnings
|
|
- pythonpath_env (PYTHONPATH environment variable)
|
|
|
|
- _PyPathConfig fields ('pathconfig' function argument):
|
|
|
|
- program_name: see config_init_program_name()
|
|
- home: Py_SetPythonHome() or PYTHONHOME environment variable
|
|
|
|
- current working directory: see copy_absolute()
|
|
|
|
Outputs, 'pathconfig' fields:
|
|
|
|
- program_full_path
|
|
- module_search_path
|
|
- prefix
|
|
- exec_prefix
|
|
|
|
If a field is already set (non NULL), it is left unchanged. */
|
|
PyStatus
|
|
_PyPathConfig_Calculate(_PyPathConfig *pathconfig, const PyConfig *config)
|
|
{
|
|
PyStatus status;
|
|
PyCalculatePath calculate;
|
|
memset(&calculate, 0, sizeof(calculate));
|
|
|
|
status = calculate_init(&calculate, config);
|
|
if (_PyStatus_EXCEPTION(status)) {
|
|
goto done;
|
|
}
|
|
|
|
status = calculate_path(&calculate, pathconfig);
|
|
if (_PyStatus_EXCEPTION(status)) {
|
|
goto done;
|
|
}
|
|
|
|
/* program_full_path must an either an empty string or an absolute path */
|
|
assert(wcslen(pathconfig->program_full_path) == 0
|
|
|| _Py_isabs(pathconfig->program_full_path));
|
|
|
|
status = _PyStatus_OK();
|
|
|
|
done:
|
|
calculate_free(&calculate);
|
|
return status;
|
|
}
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|