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StdLib: Improve robustness of stat() and make basename() a public function.

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AppPkg: Refinements to pyconfig.h and port of getpath.c to EDK II.

Signed-off-by: darylm503
Reviewed-by: geekboy15a
Reviewed-by: jljusten


git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12508 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
darylm503
2011-10-03 18:54:12 +00:00
parent 58081f2c64
commit 41b152c5f6
20 changed files with 1340 additions and 1072 deletions
Download Patch File Download Diff File Expand all files Collapse all files

59
AppPkg/Applications/Python/Efi/config.c
View File

@@ -1,4 +1,15 @@
/* Module configuration */
/** @file
Python Module configuration.
Copyright (c) 2011, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials are licensed and made available under
the terms and conditions of the BSD License that accompanies this distribution.
The full text of the license may be found at
http://opensource.org/licenses/bsd-license.
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
/* This file contains the table of built-in modules.
See init_builtin() in import.c. */
@@ -6,9 +17,9 @@
#include "Python.h"
extern void initarray(void);
//#ifndef MS_WINI64
//extern void initaudioop(void);
//#endif
#ifndef MS_WINI64
extern void initaudioop(void);
#endif
extern void initbinascii(void);
extern void initcmath(void);
extern void initerrno(void);
@@ -27,7 +38,7 @@ extern void init_sha256(void);
extern void init_sha512(void);
extern void initstrop(void);
extern void inittime(void);
//extern void initthread(void);
extern void initthread(void);
extern void initcStringIO(void);
extern void initcPickle(void);
#ifdef WIN32
@@ -38,23 +49,23 @@ extern void init_codecs(void);
extern void init_weakref(void);
extern void init_hotshot(void);
extern void initxxsubtype(void);
//extern void initzipimport(void);
extern void initzipimport(void);
extern void init_random(void);
extern void inititertools(void);
extern void init_collections(void);
extern void init_heapq(void);
extern void init_bisect(void);
extern void init_symtable(void);
//extern void initmmap(void);
extern void initmmap(void);
extern void init_csv(void);
extern void init_sre(void);
extern void initparser(void);
//extern void init_winreg(void);
extern void init_winreg(void);
extern void init_struct(void);
extern void initdatetime(void);
extern void init_functools(void);
extern void init_json(void);
//extern void initzlib(void);
extern void initzlib(void);
extern void init_multibytecodec(void);
extern void init_codecs_cn(void);
@@ -63,8 +74,8 @@ extern void init_codecs_iso2022(void);
extern void init_codecs_jp(void);
extern void init_codecs_kr(void);
extern void init_codecs_tw(void);
//extern void init_subprocess(void);
//extern void init_lsprof(void);
extern void init_subprocess(void);
extern void init_lsprof(void);
extern void init_ast(void);
extern void init_io(void);
extern void _PyWarnings_Init(void);
@@ -79,16 +90,20 @@ struct _inittab _PyImport_Inittab[] = {
{"array", initarray},
{"_ast", init_ast},
//#ifdef MS_WINDOWS
//#ifndef MS_WINI64
// {"audioop", initaudioop},
//#endif
//#endif
#ifdef MS_WINDOWS
#ifndef MS_WINI64
{"audioop", initaudioop},
#endif
#endif
{"binascii", initbinascii},
//{"cmath", initcmath},
{"errno", initerrno},
{"future_builtins", initfuture_builtins},
{"gc", initgc},
{"signal", initsignal},
#if 0
{"future_builtins", initfuture_builtins},
#ifndef MS_WINI64
{"imageop", initimageop},
#endif
@@ -96,7 +111,6 @@ struct _inittab _PyImport_Inittab[] = {
{"_md5", init_md5},
//{"nt", initnt}, /* Use the NT os functions, not posix */
{"operator", initoperator},
{"signal", initsignal},
{"_sha", init_sha},
{"_sha256", init_sha256},
{"_sha512", init_sha512},
@@ -127,10 +141,14 @@ struct _inittab _PyImport_Inittab[] = {
//{"mmap", initmmap},
{"_csv", init_csv},
{"_sre", init_sre},
#endif
{"parser", initparser},
#if 0
//{"_winreg", init_winreg},
{"_struct", init_struct},
//{"datetime", initdatetime},
{"datetime", initdatetime},
{"_functools", init_functools},
{"_json", init_json},
@@ -146,6 +164,7 @@ struct _inittab _PyImport_Inittab[] = {
{"_codecs_jp", init_codecs_jp},
{"_codecs_kr", init_codecs_kr},
{"_codecs_tw", init_codecs_tw},
#endif
/* tools/freeze/makeconfig.py marker for additional "_inittab" entries */
/* -- ADDMODULE MARKER 2 -- */
@@ -153,7 +172,7 @@ struct _inittab _PyImport_Inittab[] = {
/* This module "lives in" with marshal.c */
{"marshal", PyMarshal_Init},
/* This lives it with import.c */
/* This lives in with import.c */
{"imp", initimp},
/* These entries are here for sys.builtin_module_names */

788
AppPkg/Applications/Python/Efi/getpath.c Normal file
View File

@@ -0,0 +1,788 @@
/** @file
Return the initial module search path.
Search in specified locations for the associated Python libraries.
Py_GetPath returns module_search_path.
Py_GetPrefix returns PREFIX
Py_GetExec_Prefix returns PREFIX
Py_GetProgramFullPath returns the full path to the python executable.
These are built dynamically so that the proper volume name can be prefixed
to the paths.
For the EDK II, UEFI, implementation of Python, PREFIX and EXEC_PREFIX
are set as follows:
PREFIX = /Efi/StdLib
EXEC_PREFIX = PREFIX
The following final paths are assumed:
/Efi/Tools/Python.efi The Python executable.
/Efi/StdLib/lib/python.VERSION The platform independent Python modules.
/Efi/StdLib/lib/python.VERSION/dynalib Dynamically loadable Python extension modules.
Copyright (c) 2011, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials are licensed and made available under
the terms and conditions of the BSD License that accompanies this distribution.
The full text of the license may be found at
http://opensource.org/licenses/bsd-license.
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include <Python.h>
#include <osdefs.h>
#ifdef __cplusplus
extern "C" {
#endif
/* VERSION must be at least two characters long. */
#ifndef VERSION
#define VERSION "27"
#endif
#ifndef VPATH
#define VPATH "."
#endif
/* Search path entry delimiter */
#ifdef DELIM
#define sDELIM ";"
#endif
#ifndef PREFIX
#define PREFIX "/Efi/StdLib"
#endif
#ifndef EXEC_PREFIX
#define EXEC_PREFIX PREFIX
#endif
#ifndef LIBPYTHON
#define LIBPYTHON "lib/python." VERSION
#endif
#ifndef PYTHONPATH
//#define PYTHONPATH PREFIX LIBPYTHON sDELIM \
// EXEC_PREFIX LIBPYTHON "/lib-dynload"
#define PYTHONPATH LIBPYTHON // sDELIM
// LIBPYTHON "/lib-dynload"
#endif
#ifndef LANDMARK
#define LANDMARK "os.py"
#endif
static char prefix[MAXPATHLEN+1];
static char exec_prefix[MAXPATHLEN+1];
static char progpath[MAXPATHLEN+1];
static char *module_search_path = NULL;
static char lib_python[] = LIBPYTHON;
static char volume_name[32] = { 0 };
/** Determine if "ch" is a separator character.
@param[in] ch The character to test.
@retval TRUE ch is a separator character.
@retval FALSE ch is NOT a separator character.
**/
static int
is_sep(char ch)
{
#ifdef ALTSEP
return ch == SEP || ch == ALTSEP;
#else
return ch == SEP;
#endif
}
/** Reduce a path by its last element.
The last element (everything to the right of the last separator character)
in the path, dir, is removed from the path. Parameter dir is modified in place.
@param[in,out] dir Pointer to the path to modify.
**/
static void
reduce(char *dir)
{
size_t i = strlen(dir);
while (i > 0 && !is_sep(dir[i]))
--i;
dir[i] = '\0';
}
/** Does filename point to a file and not directory?
@param[in] filename The fully qualified path to the object to test.
@retval 0 Filename was not found, or is a directory.
@retval 1 Filename refers to a regular file.
**/
static int
isfile(char *filename)
{
struct stat buf;
if (stat(filename, &buf) != 0) {
//if (Py_VerboseFlag) PySys_WriteStderr("%s[%d] Not Found: file = \"%s\"\n", __func__, __LINE__, filename);
return 0;
}
//if (!S_ISREG(buf.st_mode))
if (S_ISDIR(buf.st_mode)) {
//if (Py_VerboseFlag) PySys_WriteStderr("%s[%d] Is DIR: file = \"%s\"\n", __func__, __LINE__, filename);
return 0;
}
//if (Py_VerboseFlag) PySys_WriteStderr("%s[%d] SUCCESS: file = \"%s\"\n", __func__, __LINE__, filename);
return 1;
}
/** Determine if filename refers to a Python module.
A Python module is indicated if the file exists, or if the file with
'o' or 'c' appended exists.
@param[in] filename The fully qualified path to the object to test.
@retval 0
**/
static int
ismodule(char *filename)
{
if (isfile(filename)) {
//if (Py_VerboseFlag) PySys_WriteStderr("%s[%d]: file = \"%s\"\n", __func__, __LINE__, filename);
return 1;
}
/* Check for the compiled version of prefix. */
if (strlen(filename) < MAXPATHLEN) {
strcat(filename, Py_OptimizeFlag ? "o" : "c");
if (isfile(filename)) {
//if (Py_VerboseFlag) PySys_WriteStderr("%s[%d]: file = \"%s\"\n", __func__, __LINE__, filename);
return 1;
}
}
//if (Py_VerboseFlag) PySys_WriteStderr("%s[%d] FAIL: file = \"%s\"\n", __func__, __LINE__, filename);
return 0;
}
/** Does filename point to a directory?
@param[in] filename The fully qualified path to the object to test.
@retval 0 Filename was not found, or is not a regular file.
@retval 1 Filename refers to a directory.
**/
static int
isdir(char *filename)
{
struct stat buf;
if (stat(filename, &buf) != 0)
return 0;
if (!S_ISDIR(buf.st_mode))
return 0;
return 1;
}
/** Determine if a path is absolute, or not.
An absolute path consists of a volume name, "VOL:", followed by a rooted path,
"/path/elements". If both of these components are present, the path is absolute.
Let P be a pointer to the path to test.
Let A be a pointer to the first ':' in P.
Let B be a pointer to the first '/' or '\\' in P.
If A and B are not NULL
If (A-P+1) == (B-P) then the path is absolute.
Otherwise, the path is NOT absolute.
@param[in] path The path to test.
@retval -1 Path is absolute but lacking volume name.
@retval 0 Path is NOT absolute.
@retval 1 Path is absolute.
*/
static int
is_absolute(char *path)
{
char *A;
char *B;
A = strchr(path, ':');
B = strpbrk(path, "/\\");
if(B != NULL) {
if(A == NULL) {
if(B == path) {
return -1;
}
}
else {
if(((A - path) + 1) == (B - path)) {
return 1;
}
}
}
return 0;
}
/** Add a path component, by appending stuff to buffer.
buffer must have at least MAXPATHLEN + 1 bytes allocated, and contain a
NUL-terminated string with no more than MAXPATHLEN characters (not counting
the trailing NUL). It's a fatal error if it contains a string longer than
that (callers must be careful!). If these requirements are met, it's
guaranteed that buffer will still be a NUL-terminated string with no more
than MAXPATHLEN characters at exit. If stuff is too long, only as much of
stuff as fits will be appended.
@param[in,out] buffer The path to be extended.
@param[in] stuff The stuff to join onto the path.
*/
static void
joinpath(char *buffer, char *stuff)
{
size_t n, k;
k = 0;
if (is_absolute(stuff) == 1) {
n = 0;
}
else {
n = strlen(buffer);
if(n == 0) {
strncpy(buffer, volume_name, MAXPATHLEN);
n = strlen(buffer);
}
/* We must not use an else clause here because we want to test n again.
volume_name may have been empty.
*/
if (n > 0 && n < MAXPATHLEN) {
if(!is_sep(buffer[n-1])) {
buffer[n++] = SEP;
}
if(is_sep(stuff[0])) ++stuff;
}
}
if (n > MAXPATHLEN)
Py_FatalError("buffer overflow in getpath.c's joinpath()");
k = strlen(stuff);
if (n + k > MAXPATHLEN)
k = MAXPATHLEN - n;
strncpy(buffer+n, stuff, k);
buffer[n+k] = '\0';
}
/** Is filename an executable file?
An executable file:
1) exists
2) is a file, not a directory
3) has a name ending with ".efi"
4) Only has a single '.' in the name.
If basename(filename) does not contain a '.', append ".efi" to filename
If filename ends in ".efi", it is executable, else it isn't.
This routine is used to when searching for the file named by argv[0].
As such, there is no need to search for extensions other than ".efi".
@param[in] filename The name of the file to test. It may, or may not, have an extension.
@retval 0 filename already has a path other than ".efi", or it doesn't exist, or is a directory.
@retval 1 filename refers to an executable file.
**/
static int
isxfile(char *filename)
{
struct stat buf;
char *bn;
char *newbn;
int bnlen;
//if (Py_VerboseFlag) PySys_WriteStderr("%s[%d] ENTER: file = \"%s\"\n", __func__, __LINE__, filename);
bn = basename(filename); // Separate off the file name component
reduce(filename); // and isolate the path component
bnlen = strlen(bn);
newbn = strrchr(bn, '.'); // Does basename contain a period?
if(newbn == NULL) { // Does NOT contain a period.
newbn = &bn[bnlen];
strncpyX(newbn, ".efi", MAXPATHLEN - bnlen); // append ".efi" to basename
bnlen += 4;
}
else if(strcmp(newbn, ".efi") != 0) {
//if (Py_VerboseFlag) PySys_WriteStderr("%s[%d]: Bad extension\n", __func__, __LINE__);
return 0; // File can not be executable.
}
joinpath(filename, bn); // Stitch path and file name back together
//if (Py_VerboseFlag) PySys_WriteStderr("%s[%d]: file = \"%s\"\n", __func__, __LINE__, filename);
if (stat(filename, &buf) != 0) { // Now, verify that file exists
//if (Py_VerboseFlag) PySys_WriteStderr("%s[%d]: Does not exist\n", __func__, __LINE__);
return 0;
}
if(S_ISDIR(buf.st_mode)) { // And it is not a directory.
//if (Py_VerboseFlag) PySys_WriteStderr("%s[%d]: Is a directory\n", __func__, __LINE__);
return 0;
}
//if (Py_VerboseFlag) PySys_WriteStderr("%s[%d] EXIT: file = \"%s\"\n", __func__, __LINE__, filename);
return 1;
}
/** Copy p into path, ensuring that the result is an absolute path.
copy_absolute requires that path be allocated at least
MAXPATHLEN + 1 bytes and that p be no more than MAXPATHLEN bytes.
@param[out] path Destination to receive the absolute path.
@param[in] p Path to be tested and possibly converted.
**/
static void
copy_absolute(char *path, char *p)
{
if (is_absolute(p) == 1)
strcpy(path, p);
else {
if (!getcwd(path, MAXPATHLEN)) {
/* unable to get the current directory */
if(volume_name[0] != 0) {
strcpy(path, volume_name);
joinpath(path, p);
}
else
strcpy(path, p);
return;
}
if (p[0] == '.' && is_sep(p[1]))
p += 2;
joinpath(path, p);
}
}
/** Modify path so that the result is an absolute path.
absolutize() requires that path be allocated at least MAXPATHLEN+1 bytes.
@param[in,out] path The path to be made absolute.
*/
static void
absolutize(char *path)
{
char buffer[MAXPATHLEN + 1];
if (is_absolute(path) == 1)
return;
copy_absolute(buffer, path);
strcpy(path, buffer);
}
/** Extract the volume name from a path.
@param[out] Dest Pointer to location in which to store the extracted volume name.
@param[in] path Pointer to the path to extract the volume name from.
**/
static void
set_volume(char *Dest, char *path)
{
size_t VolLen;
//if (Py_VerboseFlag) PySys_WriteStderr("%s[%d] ENTER: path = \"%s\"\n", __func__, __LINE__, path);
if(is_absolute(path)) {
VolLen = strcspn(path, "/\\:");
//if (Py_VerboseFlag) PySys_WriteStderr("%s[%d]: VolLen = %d\n", __func__, __LINE__, VolLen);
if((VolLen != 0) && (path[VolLen] == ':')) {
(void) strncpyX(Dest, path, VolLen + 1);
//if (Py_VerboseFlag) PySys_WriteStderr("%s[%d]: VolLen = %d, Dest = \"%s\" path = \"%s\"\n",
// __func__, __LINE__, VolLen, Dest, path);
}
}
//if (Py_VerboseFlag) PySys_WriteStderr("%s[%d] EXIT: Dest = \"%s\"\n", __func__, __LINE__, Dest);
}
/** Determine paths.
Two directories must be found, the platform independent directory
(prefix), containing the common .py and .pyc files, and the platform
dependent directory (exec_prefix), containing the shared library
modules. Note that prefix and exec_prefix are the same directory
for UEFI installations.
Separate searches are carried out for prefix and exec_prefix.
Each search tries a number of different locations until a ``landmark''
file or directory is found. If no prefix or exec_prefix is found, a
warning message is issued and the preprocessor defined PREFIX and
EXEC_PREFIX are used (even though they may not work); python carries on
as best as is possible, but some imports may fail.
Before any searches are done, the location of the executable is
determined. If argv[0] has one or more slashes in it, it is used
unchanged. Otherwise, it must have been invoked from the shell's path,
so we search %PATH% for the named executable and use that. If the
executable was not found on %PATH% (or there was no %PATH% environment
variable), the original argv[0] string is used.
Finally, argv0_path is set to the directory containing the executable
(i.e. the last component is stripped).
With argv0_path in hand, we perform a number of steps. The same steps
are performed for prefix and for exec_prefix, but with a different
landmark.
The prefix landmark will always be lib/python.VERSION/os.py and the
exec_prefix will always be lib/python.VERSION/dynaload, where VERSION
is Python's version number as defined at the beginning of this file.
First. See if the %PYTHONHOME% environment variable points to the
installed location of the Python libraries. If %PYTHONHOME% is set, then
it points to prefix and exec_prefix. %PYTHONHOME% can be a single
directory, which is used for both, or the prefix and exec_prefix
directories separated by the DELIM character.
Next. Search the directories pointed to by the preprocessor variables
PREFIX and EXEC_PREFIX. These paths are prefixed with the volume name
extracted from argv0_path. The volume names correspond to the UEFI
shell "map" names.
That's it!
Well, almost. Once we have determined prefix and exec_prefix, the
preprocessor variable PYTHONPATH is used to construct a path. Each
relative path on PYTHONPATH is prefixed with prefix. Then the directory
containing the shared library modules is appended. The environment
variable $PYTHONPATH is inserted in front of it all. Finally, the
prefix and exec_prefix globals are tweaked so they reflect the values
expected by other code, by stripping the "lib/python$VERSION/..." stuff
off. This seems to make more sense given that currently the only
known use of sys.prefix and sys.exec_prefix is for the ILU installation
process to find the installed Python tree.
The final, fully resolved, paths should look something like:
fs0:/Efi/Tools/python.efi
fs0:/Efi/StdLib/lib/python27
fs0:/Efi/StdLib/lib/python27/dynaload
**/
static void
calculate_path(void)
{
extern char *Py_GetProgramName(void);
static char delimiter[2] = {DELIM, '\0'};
static char separator[2] = {SEP, '\0'};
char *pythonpath = PYTHONPATH;
char *rtpypath = Py_GETENV("PYTHONPATH");
//char *home = Py_GetPythonHome();
char *path = getenv("PATH");
char *prog = Py_GetProgramName();
char argv0_path[MAXPATHLEN+1];
char zip_path[MAXPATHLEN+1];
//int pfound, efound; /* 1 if found; -1 if found build directory */
char *buf;
size_t bufsz;
size_t prefixsz;
char *defpath;
//uint32_t nsexeclength = MAXPATHLEN;
//unixify(path);
//unixify(rtpypath);
//if (Py_VerboseFlag) PySys_WriteStderr("%s[%d]:\nENTER prog=\"%s\"\n path=\"%s\"\n", __func__, __LINE__, prog, path);
/* ###########################################################################
Determine path to the Python.efi binary.
Produces progpath, argv0_path, and volume_name.
########################################################################### */
/* 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 (strchr(prog, SEP))
strncpy(progpath, prog, MAXPATHLEN);
else if (path) {
while (1) {
char *delim = strchr(path, DELIM);
if (delim) {
size_t len = delim - path;
if (len > MAXPATHLEN)
len = MAXPATHLEN;
strncpy(progpath, path, len);
*(progpath + len) = '\0';
}
else
strncpy(progpath, path, MAXPATHLEN);
joinpath(progpath, prog);
//if (Py_VerboseFlag) PySys_WriteStderr("%s[%d]: progpath = \"%s\"\n", __func__, __LINE__, progpath);
if (isxfile(progpath))
break;
if (!delim) {
progpath[0] = '\0';
break;
}
path = delim + 1;
}
}
else
progpath[0] = '\0';
if ( (!is_absolute(progpath)) && (progpath[0] != '\0') )
absolutize(progpath);
strncpy(argv0_path, progpath, MAXPATHLEN);
argv0_path[MAXPATHLEN] = '\0';
set_volume(volume_name, argv0_path);
//if (Py_VerboseFlag) PySys_WriteStderr("%s[%d]: volume_name = \"%s\"\n", __func__, __LINE__, volume_name);
reduce(argv0_path);
//if (Py_VerboseFlag) PySys_WriteStderr("%s[%d]: progpath = \"%s\"\n", __func__, __LINE__, progpath);
//if (Py_VerboseFlag) PySys_WriteStderr("%s[%d]: argv0_path = \"%s\"\n", __func__, __LINE__, argv0_path);
/* At this point, argv0_path is guaranteed to be less than
MAXPATHLEN bytes long.
*/
/* ###########################################################################
Build the FULL prefix string, including volume name.
This is the full path to the platform independent libraries.
########################################################################### */
//if (!(pfound = search_for_prefix(argv0_path, home))) {
// if (!Py_FrozenFlag)
// fprintf(stderr,
// "Could not find platform independent libraries <prefix>\n");
strncpy(prefix, volume_name, MAXPATHLEN);
joinpath(prefix, PREFIX);
joinpath(prefix, lib_python);
//}
//else
// reduce(prefix);
//if (Py_VerboseFlag) PySys_WriteStderr("%s[%d]: V = \"%s\", Prefix = \"%s\"\n", __func__, __LINE__, volume_name, prefix);
/* ###########################################################################
Build the FULL path to the zipped-up Python library.
########################################################################### */
strncpy(zip_path, prefix, MAXPATHLEN);
zip_path[MAXPATHLEN] = '\0';
//if (pfound > 0) { /* Use the reduced prefix returned by Py_GetPrefix() */
reduce(zip_path);
//reduce(zip_path);
//}
//else
// strncpy(zip_path, PREFIX, MAXPATHLEN);
joinpath(zip_path, "python00.zip");
bufsz = strlen(zip_path); /* Replace "00" with version */
zip_path[bufsz - 6] = VERSION[0];
zip_path[bufsz - 5] = VERSION[1];
//if (Py_VerboseFlag) PySys_WriteStderr("%s[%d]: Zip_path = \"%s\"\n", __func__, __LINE__, zip_path);
/* ###########################################################################
Build the FULL path to dynamically loadable libraries.
########################################################################### */
//if (!(efound = search_for_exec_prefix(argv0_path, home))) {
// if (!Py_FrozenFlag)
// fprintf(stderr,
// "Could not find platform dependent libraries <exec_prefix>\n");
strncpy(exec_prefix, volume_name, MAXPATHLEN);
joinpath(exec_prefix, EXEC_PREFIX);
joinpath(exec_prefix, lib_python);
joinpath(exec_prefix, "dynaload");
//}
/* If we found EXEC_PREFIX do *not* reduce it! (Yet.) */
//if (Py_VerboseFlag) PySys_WriteStderr("%s[%d]: Exec_prefix = \"%s\"\n", __func__, __LINE__, exec_prefix);
//if ((!pfound || !efound) && !Py_FrozenFlag)
// fprintf(stderr,
// "Consider setting $PYTHONHOME to <prefix>[%c<exec_prefix>]\n", DELIM);
/* ###########################################################################
Build the module search path.
########################################################################### */
/* 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 (pfound > 0) {
reduce(prefix);
reduce(prefix);
/* The prefix is the root directory, but reduce() chopped
* off the "/". */
if (!prefix[0]) {
strcpy(prefix, volume_name);
}
bufsz = strlen(prefix);
if(prefix[bufsz-1] == ':') {
prefix[bufsz] = SEP;
prefix[bufsz+1] = 0;
}
//}
//else
// strncpy(prefix, PREFIX, MAXPATHLEN);
//if (Py_VerboseFlag) PySys_WriteStderr("%s[%d]: prefix = \"%s\"\n", __func__, __LINE__, prefix);
/* Calculate size of return buffer.
*/
defpath = pythonpath;
bufsz = 0;
if (rtpypath)
bufsz += strlen(rtpypath) + 1;
prefixsz = strlen(prefix) + 1;
while (1) {
char *delim = strchr(defpath, DELIM);
if (is_absolute(defpath) == 0)
/* Paths are relative to prefix */
bufsz += prefixsz;
if (delim)
bufsz += delim - defpath + 1;
else {
bufsz += strlen(defpath) + 1;
break;
}
defpath = delim + 1;
}
//if (Py_VerboseFlag) PySys_WriteStderr("%s[%d]: defpath = \"%s\"\n", __func__, __LINE__, defpath);
bufsz += strlen(zip_path) + 1;
bufsz += strlen(exec_prefix) + 1;
/* This is the only malloc call in this file */
buf = (char *)PyMem_Malloc(bufsz);
if (buf == NULL) {
/* We can't exit, so print a warning and limp along */
fprintf(stderr, "Not enough memory for dynamic PYTHONPATH.\n");
fprintf(stderr, "Using default static PYTHONPATH.\n");
module_search_path = PYTHONPATH;
}
else {
//if (Py_VerboseFlag) PySys_WriteStderr("%s[%d]:\n", __func__, __LINE__);
/* Run-time value of $PYTHONPATH goes first */
if (rtpypath) {
strcpy(buf, rtpypath);
strcat(buf, delimiter);
}
else
buf[0] = '\0';
//if (Py_VerboseFlag) PySys_WriteStderr("%s[%d]: RTpath = \"%s\"\n", __func__, __LINE__, buf);
/* Next is the default zip path */
strcat(buf, zip_path);
strcat(buf, delimiter);
//if (Py_VerboseFlag) PySys_WriteStderr("%s[%d]: +Zip = \"%s\"\n", __func__, __LINE__, buf);
/* Next goes merge of compile-time $PYTHONPATH with
* dynamically located prefix.
*/
defpath = pythonpath;
while (1) {
char *delim = strchr(defpath, DELIM);
if (is_absolute(defpath) != 1) {
strcat(buf, prefix);
strcat(buf, separator);
}
if (delim) {
size_t len = delim - defpath + 1;
size_t end = strlen(buf) + len;
strncat(buf, defpath, len);
*(buf + end) = '\0';
}
else {
strcat(buf, defpath);
break;
}
defpath = delim + 1;
}
strcat(buf, delimiter);
//if (Py_VerboseFlag) PySys_WriteStderr("%s[%d]: +Merge = \"%s\"\n", __func__, __LINE__, buf);
/* Finally, on goes the directory for dynamic-load modules */
strcat(buf, exec_prefix);
/* And publish the results */
module_search_path = buf;
//if (Py_VerboseFlag) PySys_WriteStderr("%s[%d]: module_search_path = \"%s\"\n", __func__, __LINE__, module_search_path);
}
//if (efound > 0) {
/* At this point, exec_prefix is set to VOL:/Efi/StdLib/lib/python.27/dynalib.
We want to get back to the root value, so we have to remove the final three
segments to get VOL:/Efi/StdLib. Because we don't know what VOL is, and
EXEC_PREFIX is also indeterminate, we just remove the three final segments.
*/
reduce(exec_prefix);
reduce(exec_prefix);
reduce(exec_prefix);
if (!exec_prefix[0]) {
strcpy(exec_prefix, volume_name);
}
bufsz = strlen(exec_prefix);
if(exec_prefix[bufsz-1] == ':') {
exec_prefix[bufsz] = SEP;
exec_prefix[bufsz+1] = 0;
}
//}
//else
// strncpy(exec_prefix, EXEC_PREFIX, MAXPATHLEN);
if (Py_VerboseFlag) PySys_WriteStderr("%s[%d]: module_search_path = \"%s\"\n", __func__, __LINE__, module_search_path);
if (Py_VerboseFlag) PySys_WriteStderr("%s[%d]: prefix = \"%s\"\n", __func__, __LINE__, prefix);
if (Py_VerboseFlag) PySys_WriteStderr("%s[%d]: exec_prefix = \"%s\"\n", __func__, __LINE__, exec_prefix);
if (Py_VerboseFlag) PySys_WriteStderr("%s[%d]: progpath = \"%s\"\n", __func__, __LINE__, progpath);
}
/* External interface */
char *
Py_GetPath(void)
{
if (!module_search_path)
calculate_path();
return module_search_path;
}
char *
Py_GetPrefix(void)
{
if (!module_search_path)
calculate_path();
return prefix;
}
char *
Py_GetExecPrefix(void)
{
if (!module_search_path)
calculate_path();
return exec_prefix;
}
char *
Py_GetProgramFullPath(void)
{
if (!module_search_path)
calculate_path();
return progpath;
}
#ifdef __cplusplus
}
#endif

714
AppPkg/Applications/Python/Efi/getpathp.c
View File

@@ -1,714 +0,0 @@
/* Return the initial module search path. */
/* Used by DOS, OS/2, Windows 3.1, Windows 95/98, Windows NT. */
/* ----------------------------------------------------------------
PATH RULES FOR WINDOWS:
This describes how sys.path is formed on Windows. It describes the
functionality, not the implementation (ie, the order in which these
are actually fetched is different)
* Python always adds an empty entry at the start, which corresponds
to the current directory.
* If the PYTHONPATH env. var. exists, its entries are added next.
* We look in the registry for "application paths" - that is, sub-keys
under the main PythonPath registry key. These are added next (the
order of sub-key processing is undefined).
HKEY_CURRENT_USER is searched and added first.
HKEY_LOCAL_MACHINE is searched and added next.
(Note that all known installers only use HKLM, so HKCU is typically
empty)
* We attempt to locate the "Python Home" - if the PYTHONHOME env var
is set, we believe it. Otherwise, we use the path of our host .EXE's
to try and locate our "landmark" (lib\\os.py) and deduce our home.
- If we DO have a Python Home: The relevant sub-directories (Lib,
plat-win, lib-tk, etc) are based on the Python Home
- If we DO NOT have a Python Home, the core Python Path is
loaded from the registry. This is the main PythonPath key,
and both HKLM and HKCU are combined to form the path)
* Iff - we can not locate the Python Home, have not had a PYTHONPATH
specified, and can't locate any Registry entries (ie, we have _nothing_
we can assume is a good path), a default path with relative entries is
used (eg. .\Lib;.\plat-win, etc)
The end result of all this is:
* When running python.exe, or any other .exe in the main Python directory
(either an installed version, or directly from the PCbuild directory),
the core path is deduced, and the core paths in the registry are
ignored. Other "application paths" in the registry are always read.
* When Python is hosted in another exe (different directory, embedded via
COM, etc), the Python Home will not be deduced, so the core path from
the registry is used. Other "application paths" in the registry are
always read.
* If Python can't find its home and there is no registry (eg, frozen
exe, some very strange installation setup) you get a path with
some default, but relative, paths.
---------------------------------------------------------------- */
#include "Python.h"
#include "osdefs.h"
#ifdef MS_WINDOWS
#include <windows.h>
#include <tchar.h>
#endif
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif /* HAVE_SYS_TYPES_H */
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif /* HAVE_SYS_STAT_H */
#include <string.h>
/* Search in some common locations for the associated Python libraries.
*
* Py_GetPath() tries to return a sensible Python module search path.
*
* The approach is an adaptation for Windows of the strategy used in
* ../Modules/getpath.c; it uses the Windows Registry as one of its
* information sources.
*/
#ifndef LANDMARK
#define LANDMARK "lib\\os.py"
#endif
static char prefix[MAXPATHLEN+1];
static char progpath[MAXPATHLEN+1];
static char dllpath[MAXPATHLEN+1];
static char *module_search_path = NULL;
static int
is_sep(char ch) /* determine if "ch" is a separator character */
{
#ifdef ALTSEP
return ch == SEP || ch == ALTSEP;
#else
return ch == SEP;
#endif
}
/* assumes 'dir' null terminated in bounds. Never writes
beyond existing terminator.
*/
static void
reduce(char *dir)
{
size_t i = strlen(dir);
while (i > 0 && !is_sep(dir[i]))
--i;
dir[i] = '\0';
}
static int
exists(char *filename)
{
struct stat buf;
return stat(filename, &buf) == 0;
}
/* Assumes 'filename' MAXPATHLEN+1 bytes long -
may extend 'filename' by one character.
*/
static int
ismodule(char *filename) /* Is module -- check for .pyc/.pyo too */
{
if (exists(filename))
return 1;
/* Check for the compiled version of prefix. */
if (strlen(filename) < MAXPATHLEN) {
strcat(filename, Py_OptimizeFlag ? "o" : "c");
if (exists(filename))
return 1;
}
return 0;
}
/* Add a path component, by appending stuff to buffer.
buffer must have at least MAXPATHLEN + 1 bytes allocated, and contain a
NUL-terminated string with no more than MAXPATHLEN characters (not counting
the trailing NUL). It's a fatal error if it contains a string longer than
that (callers must be careful!). If these requirements are met, it's
guaranteed that buffer will still be a NUL-terminated string with no more
than MAXPATHLEN characters at exit. If stuff is too long, only as much of
stuff as fits will be appended.
*/
static void
join(char *buffer, char *stuff)
{
size_t n, k;
if (is_sep(stuff[0]))
n = 0;
else {
n = strlen(buffer);
if (n > 0 && !is_sep(buffer[n-1]) && n < MAXPATHLEN)
buffer[n++] = SEP;
}
if (n > MAXPATHLEN)
Py_FatalError("buffer overflow in getpathp.c's joinpath()");
k = strlen(stuff);
if (n + k > MAXPATHLEN)
k = MAXPATHLEN - n;
strncpy(buffer+n, stuff, k);
buffer[n+k] = '\0';
}
/* gotlandmark only called by search_for_prefix, which ensures
'prefix' is null terminated in bounds. join() ensures
'landmark' can not overflow prefix if too long.
*/
static int
gotlandmark(char *landmark)
{
int ok;
Py_ssize_t n;
n = strlen(prefix);
join(prefix, landmark);
ok = ismodule(prefix);
prefix[n] = '\0';
return ok;
}
/* assumes argv0_path is MAXPATHLEN+1 bytes long, already \0 term'd.
assumption provided by only caller, calculate_path() */
static int
search_for_prefix(char *argv0_path, char *landmark)
{
/* Search from argv0_path, until landmark is found */
strcpy(prefix, argv0_path);
do {
if (gotlandmark(landmark))
return 1;
reduce(prefix);
} while (prefix[0]);
return 0;
}
#ifdef MS_WINDOWS
#ifdef Py_ENABLE_SHARED
/* a string loaded from the DLL at startup.*/
extern const char *PyWin_DLLVersionString;
/* Load a PYTHONPATH value from the registry.
Load from either HKEY_LOCAL_MACHINE or HKEY_CURRENT_USER.
Works in both Unicode and 8bit environments. Only uses the
Ex family of functions so it also works with Windows CE.
Returns NULL, or a pointer that should be freed.
XXX - this code is pretty strange, as it used to also
work on Win16, where the buffer sizes werent available
in advance. It could be simplied now Win16/Win32s is dead!
*/
static char *
getpythonregpath(HKEY keyBase, int skipcore)
{
HKEY newKey = 0;
DWORD dataSize = 0;
DWORD numKeys = 0;
LONG rc;
char *retval = NULL;
TCHAR *dataBuf = NULL;
static const TCHAR keyPrefix[] = _T("Software\\Python\\PythonCore\\");
static const TCHAR keySuffix[] = _T("\\PythonPath");
size_t versionLen;
DWORD index;
TCHAR *keyBuf = NULL;
TCHAR *keyBufPtr;
TCHAR **ppPaths = NULL;
/* Tried to use sysget("winver") but here is too early :-( */
versionLen = _tcslen(PyWin_DLLVersionString);
/* Space for all the chars, plus one \0 */
keyBuf = keyBufPtr = malloc(sizeof(keyPrefix) +
sizeof(TCHAR)*(versionLen-1) +
sizeof(keySuffix));
if (keyBuf==NULL) goto done;
memcpy(keyBufPtr, keyPrefix, sizeof(keyPrefix)-sizeof(TCHAR));
keyBufPtr += sizeof(keyPrefix)/sizeof(TCHAR) - 1;
memcpy(keyBufPtr, PyWin_DLLVersionString, versionLen * sizeof(TCHAR));
keyBufPtr += versionLen;
/* NULL comes with this one! */
memcpy(keyBufPtr, keySuffix, sizeof(keySuffix));
/* Open the root Python key */
rc=RegOpenKeyEx(keyBase,
keyBuf, /* subkey */
0, /* reserved */
KEY_READ,
&newKey);
if (rc!=ERROR_SUCCESS) goto done;
/* Find out how big our core buffer is, and how many subkeys we have */
rc = RegQueryInfoKey(newKey, NULL, NULL, NULL, &numKeys, NULL, NULL,
NULL, NULL, &dataSize, NULL, NULL);
if (rc!=ERROR_SUCCESS) goto done;
if (skipcore) dataSize = 0; /* Only count core ones if we want them! */
/* Allocate a temp array of char buffers, so we only need to loop
reading the registry once
*/
ppPaths = malloc( sizeof(TCHAR *) * numKeys );
if (ppPaths==NULL) goto done;
memset(ppPaths, 0, sizeof(TCHAR *) * numKeys);
/* Loop over all subkeys, allocating a temp sub-buffer. */
for(index=0;index<numKeys;index++) {
TCHAR keyBuf[MAX_PATH+1];
HKEY subKey = 0;
DWORD reqdSize = MAX_PATH+1;
/* Get the sub-key name */
DWORD rc = RegEnumKeyEx(newKey, index, keyBuf, &reqdSize,
NULL, NULL, NULL, NULL );
if (rc!=ERROR_SUCCESS) goto done;
/* Open the sub-key */
rc=RegOpenKeyEx(newKey,
keyBuf, /* subkey */
0, /* reserved */
KEY_READ,
&subKey);
if (rc!=ERROR_SUCCESS) goto done;
/* Find the value of the buffer size, malloc, then read it */
RegQueryValueEx(subKey, NULL, 0, NULL, NULL, &reqdSize);
if (reqdSize) {
ppPaths[index] = malloc(reqdSize);
if (ppPaths[index]) {
RegQueryValueEx(subKey, NULL, 0, NULL,
(LPBYTE)ppPaths[index],
&reqdSize);
dataSize += reqdSize + 1; /* 1 for the ";" */
}
}
RegCloseKey(subKey);
}
/* return null if no path to return */
if (dataSize == 0) goto done;
/* original datasize from RegQueryInfo doesn't include the \0 */
dataBuf = malloc((dataSize+1) * sizeof(TCHAR));
if (dataBuf) {
TCHAR *szCur = dataBuf;
DWORD reqdSize = dataSize;
/* Copy our collected strings */
for (index=0;index<numKeys;index++) {
if (index > 0) {
*(szCur++) = _T(';');
dataSize--;
}
if (ppPaths[index]) {
Py_ssize_t len = _tcslen(ppPaths[index]);
_tcsncpy(szCur, ppPaths[index], len);
szCur += len;
assert(dataSize > (DWORD)len);
dataSize -= (DWORD)len;
}
}
if (skipcore)
*szCur = '\0';
else {
/* If we have no values, we dont need a ';' */
if (numKeys) {
*(szCur++) = _T(';');
dataSize--;
}
/* Now append the core path entries -
this will include the NULL
*/
rc = RegQueryValueEx(newKey, NULL, 0, NULL,
(LPBYTE)szCur, &dataSize);
}
/* And set the result - caller must free
If MBCS, it is fine as is. If Unicode, allocate new
buffer and convert.
*/
#ifdef UNICODE
retval = (char *)malloc(reqdSize+1);
if (retval)
WideCharToMultiByte(CP_ACP, 0,
dataBuf, -1, /* source */
retval, reqdSize+1, /* dest */
NULL, NULL);
free(dataBuf);
#else
retval = dataBuf;
#endif
}
done:
/* Loop freeing my temp buffers */
if (ppPaths) {
for(index=0;index<numKeys;index++)
if (ppPaths[index]) free(ppPaths[index]);
free(ppPaths);
}
if (newKey)
RegCloseKey(newKey);
if (keyBuf)
free(keyBuf);
return retval;
}
#endif /* Py_ENABLE_SHARED */
#endif /* MS_WINDOWS */
static void
get_progpath(void)
{
extern char *Py_GetProgramName(void);
char *path = getenv("PATH");
char *prog = Py_GetProgramName();
#ifdef MS_WINDOWS
extern HANDLE PyWin_DLLhModule;
#ifdef UNICODE
WCHAR wprogpath[MAXPATHLEN+1];
/* Windows documents that GetModuleFileName() will "truncate",
but makes no mention of the null terminator. Play it safe.
PLUS Windows itself defines MAX_PATH as the same, but anyway...
*/
#ifdef Py_ENABLE_SHARED
wprogpath[MAXPATHLEN]=_T('\0');
if (PyWin_DLLhModule &&
GetModuleFileName(PyWin_DLLhModule, wprogpath, MAXPATHLEN)) {
WideCharToMultiByte(CP_ACP, 0,
wprogpath, -1,
dllpath, MAXPATHLEN+1,
NULL, NULL);
}
#else
dllpath[0] = 0;
#endif
wprogpath[MAXPATHLEN]=_T('\0');
if (GetModuleFileName(NULL, wprogpath, MAXPATHLEN)) {
WideCharToMultiByte(CP_ACP, 0,
wprogpath, -1,
progpath, MAXPATHLEN+1,
NULL, NULL);
return;
}
#else
/* static init of progpath ensures final char remains \0 */
#ifdef Py_ENABLE_SHARED
if (PyWin_DLLhModule)
if (!GetModuleFileName(PyWin_DLLhModule, dllpath, MAXPATHLEN))
dllpath[0] = 0;
#else
dllpath[0] = 0;
#endif
if (GetModuleFileName(NULL, progpath, MAXPATHLEN))
return;
#endif
#endif
if (prog == NULL || *prog == '\0')
prog = "python";
/* 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.
*/
#ifdef ALTSEP
if (strchr(prog, SEP) || strchr(prog, ALTSEP))
#else
if (strchr(prog, SEP))
#endif
strncpy(progpath, prog, MAXPATHLEN);
else if (path) {
while (1) {
char *delim = strchr(path, DELIM);
if (delim) {
size_t len = delim - path;
/* ensure we can't overwrite buffer */
len = MIN(MAXPATHLEN,len);
strncpy(progpath, path, len);
*(progpath + len) = '\0';
}
else
strncpy(progpath, path, MAXPATHLEN);
/* join() is safe for MAXPATHLEN+1 size buffer */
join(progpath, prog);
if (exists(progpath))
break;
if (!delim) {
progpath[0] = '\0';
break;
}
path = delim + 1;
}
}
else
progpath[0] = '\0';
}
static void
calculate_path(void)
{
char argv0_path[MAXPATHLEN+1];
char *buf;
size_t bufsz;
char *pythonhome = Py_GetPythonHome();
char *envpath = Py_GETENV("PYTHONPATH");
#ifdef MS_WINDOWS
int skiphome, skipdefault;
char *machinepath = NULL;
char *userpath = NULL;
char zip_path[MAXPATHLEN+1];
size_t len;
#endif
get_progpath();
/* progpath guaranteed \0 terminated in MAXPATH+1 bytes. */
strcpy(argv0_path, progpath);
reduce(argv0_path);
if (pythonhome == NULL || *pythonhome == '\0') {
if (search_for_prefix(argv0_path, LANDMARK))
pythonhome = prefix;
else
pythonhome = NULL;
}
else
strncpy(prefix, pythonhome, MAXPATHLEN);
if (envpath && *envpath == '\0')
envpath = NULL;
#ifdef MS_WINDOWS
/* Calculate zip archive path */
if (dllpath[0]) /* use name of python DLL */
strncpy(zip_path, dllpath, MAXPATHLEN);
else /* use name of executable program */
strncpy(zip_path, progpath, MAXPATHLEN);
zip_path[MAXPATHLEN] = '\0';
len = strlen(zip_path);
if (len > 4) {
zip_path[len-3] = 'z'; /* change ending to "zip" */
zip_path[len-2] = 'i';
zip_path[len-1] = 'p';
}
else {
zip_path[0] = 0;
}
skiphome = pythonhome==NULL ? 0 : 1;
#ifdef Py_ENABLE_SHARED
machinepath = getpythonregpath(HKEY_LOCAL_MACHINE, skiphome);
userpath = getpythonregpath(HKEY_CURRENT_USER, skiphome);
#endif
/* We only use the default relative PYTHONPATH if we havent
anything better to use! */
skipdefault = envpath!=NULL || pythonhome!=NULL || \
machinepath!=NULL || userpath!=NULL;
#endif
/* We need to construct a path from the following parts.
(1) the PYTHONPATH environment variable, if set;
(2) for Win32, the zip archive file path;
(3) for Win32, the machinepath and userpath, if set;
(4) the PYTHONPATH config macro, with the leading "."
of each component replaced with pythonhome, if set;
(5) the directory containing the executable (argv0_path).
The length calculation calculates #4 first.
Extra rules:
- If PYTHONHOME is set (in any way) item (3) is ignored.
- If registry values are used, (4) and (5) are ignored.
*/
/* Calculate size of return buffer */
if (pythonhome != NULL) {
char *p;
bufsz = 1;
for (p = PYTHONPATH; *p; p++) {
if (*p == DELIM)
bufsz++; /* number of DELIM plus one */
}
bufsz *= strlen(pythonhome);
}
else
bufsz = 0;
bufsz += strlen(PYTHONPATH) + 1;
bufsz += strlen(argv0_path) + 1;
#ifdef MS_WINDOWS
if (userpath)
bufsz += strlen(userpath) + 1;
if (machinepath)
bufsz += strlen(machinepath) + 1;
bufsz += strlen(zip_path) + 1;
#endif
if (envpath != NULL)
bufsz += strlen(envpath) + 1;
module_search_path = buf = malloc(bufsz);
if (buf == NULL) {
/* We can't exit, so print a warning and limp along */
fprintf(stderr, "Can't malloc dynamic PYTHONPATH.\n");
if (envpath) {
fprintf(stderr, "Using environment $PYTHONPATH.\n");
module_search_path = envpath;
}
else {
fprintf(stderr, "Using default static path.\n");
module_search_path = PYTHONPATH;
}
#ifdef MS_WINDOWS
if (machinepath)
free(machinepath);
if (userpath)
free(userpath);
#endif /* MS_WINDOWS */
return;
}
if (envpath) {
strcpy(buf, envpath);
buf = strchr(buf, '\0');
*buf++ = DELIM;
}
#ifdef MS_WINDOWS
if (zip_path[0]) {
strcpy(buf, zip_path);
buf = strchr(buf, '\0');
*buf++ = DELIM;
}
if (userpath) {
strcpy(buf, userpath);
buf = strchr(buf, '\0');
*buf++ = DELIM;
free(userpath);
}
if (machinepath) {
strcpy(buf, machinepath);
buf = strchr(buf, '\0');
*buf++ = DELIM;
free(machinepath);
}
if (pythonhome == NULL) {
if (!skipdefault) {
strcpy(buf, PYTHONPATH);
buf = strchr(buf, '\0');
}
}
#else
if (pythonhome == NULL) {
strcpy(buf, PYTHONPATH);
buf = strchr(buf, '\0');
}
#endif /* MS_WINDOWS */
else {
char *p = PYTHONPATH;
char *q;
size_t n;
for (;;) {
q = strchr(p, DELIM);
if (q == NULL)
n = strlen(p);
else
n = q-p;
if (p[0] == '.' && is_sep(p[1])) {
strcpy(buf, pythonhome);
buf = strchr(buf, '\0');
p++;
n--;
}
strncpy(buf, p, n);
buf += n;
if (q == NULL)
break;
*buf++ = DELIM;
p = q+1;
}
}
if (argv0_path) {
*buf++ = DELIM;
strcpy(buf, argv0_path);
buf = strchr(buf, '\0');
}
*buf = '\0';
/* Now to pull one last hack/trick. If sys.prefix is
empty, then try and find it somewhere on the paths
we calculated. We scan backwards, as our general policy
is that Python core directories are at the *end* of
sys.path. We assume that our "lib" directory is
on the path, and that our 'prefix' directory is
the parent of that.
*/
if (*prefix=='\0') {
char lookBuf[MAXPATHLEN+1];
char *look = buf - 1; /* 'buf' is at the end of the buffer */
while (1) {
Py_ssize_t nchars;
char *lookEnd = look;
/* 'look' will end up one character before the
start of the path in question - even if this
is one character before the start of the buffer
*/
while (look >= module_search_path && *look != DELIM)
look--;
nchars = lookEnd-look;
strncpy(lookBuf, look+1, nchars);
lookBuf[nchars] = '\0';
/* Up one level to the parent */
reduce(lookBuf);
if (search_for_prefix(lookBuf, LANDMARK)) {
break;
}
/* If we are out of paths to search - give up */
if (look < module_search_path)
break;
look--;
}
}
}
/* External interface */
char *
Py_GetPath(void)
{
if (!module_search_path)
calculate_path();
return module_search_path;
}
char *
Py_GetPrefix(void)
{
if (!module_search_path)
calculate_path();
return prefix;
}
char *
Py_GetExecPrefix(void)
{
return Py_GetPrefix();
}
char *
Py_GetProgramFullPath(void)
{
if (!module_search_path)
calculate_path();
return progpath;
}