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_Py_wrealpath() requires the size of the output buffer

This commit is contained in:
Victor Stinner 2010-10-07 22:29:53 +00:00
parent a4a759515e
commit 015f4d87ab
3 changed files with 6 additions and 4 deletions
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3
Include/fileutils.h
View File

@ -41,7 +41,8 @@ PyAPI_FUNC(int) _Py_wreadlink(
#ifdef HAVE_REALPATH
PyAPI_FUNC(wchar_t*) _Py_wrealpath(
const wchar_t *path,
wchar_t *resolved_path);
wchar_t *resolved_path,
size_t resolved_path_size);
#endif
PyAPI_FUNC(wchar_t*) _Py_wgetcwd(

5
Python/fileutils.c
View File

@ -321,7 +321,8 @@ _Py_wreadlink(const wchar_t *path, wchar_t *buf, size_t bufsiz)
#ifdef HAVE_REALPATH
wchar_t*
_Py_wrealpath(const wchar_t *path, wchar_t *resolved_path)
_Py_wrealpath(const wchar_t *path,
wchar_t *resolved_path, size_t resolved_path_size)
{
char *cpath;
char cresolved_path[PATH_MAX];
@ -336,7 +337,7 @@ _Py_wrealpath(const wchar_t *path, wchar_t *resolved_path)
PyMem_Free(cpath);
if (res == NULL)
return NULL;
r = mbstowcs(resolved_path, cresolved_path, PATH_MAX);
r = mbstowcs(resolved_path, cresolved_path, resolved_path_size);
if (r == (size_t)-1 || r >= PATH_MAX) {
errno = EINVAL;
return NULL;

2
Python/sysmodule.c
View File

@ -1742,7 +1742,7 @@ sys_update_path(int argc, wchar_t **argv)
#else /* All other filename syntaxes */
if (_HAVE_SCRIPT_ARGUMENT(argc, argv)) {
#if defined(HAVE_REALPATH)
if (_Py_wrealpath(argv0, fullpath)) {
if (_Py_wrealpath(argv0, fullpath, PATH_MAX)) {
argv0 = fullpath;
}
#endif