Issue #19544 and Issue #6516: Restore support for --user and --group parameters to sdist command as found in Python 2.7 and originally slated for Python 3.2 but accidentally rolled back as part of the distutils2 rollback. Closes Issue #6516.

PATH_MAX is not declared on IRIX nor Windows.

PATH_MAX is not declared on IRIX nor Windows.

the size of the fullpath buffer, not PATH_MAX. fullpath is declared using
MAXPATHLEN or MAX_PATH depending on the OS, and PATH_MAX is not declared on
IRIX.

the fullpath buffer, not PATH_MAX. fullpath is declared using MAXPATHLEN or
MAX_PATH depending on the OS, and PATH_MAX is not declared on IRIX.

the size of the env_home buffer, not PATH_MAX+1. env_home is declared using
MAXPATHLEN+1, and PATH_MAX is not declared on IRIX.

the env_home buffer, not PATH_MAX+1. env_home is declared using MAXPATHLEN+1,
and PATH_MAX is not declared on IRIX.

failure

PyMapping_Values() with an exception set, exit immediatly on error.

failure

CID 1128792: Dereference null return value (NULL_RETURNS)

CID 1128793: Missing varargs init or cleanup (VARARGS)

PyLong_FromLong() failure

error handling

The following code didn't handle correctly the failure of
PyUnicode_InternFromString("__name__").

if (newobj_str == NULL) {
    newobj_str = PyUnicode_InternFromString("__newobj__");
    name_str = PyUnicode_InternFromString("__name__");
    if (newobj_str == NULL || name_str == NULL)
        return -1;
}

the exception when PyList_Append() fails