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Issue #9647: os.confstr() ensures that the second call to confstr() returns the

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same length.
This commit is contained in:
Victor Stinner 2014-12-05 22:51:51 +01:00
parent efb4835f36
commit cbc18f328c
1 changed files with 3 additions and 1 deletions
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4
Modules/posixmodule.c
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@ -14369,10 +14369,12 @@ os_confstr_impl(PyModuleDef *module, int name)
} }
if (len >= sizeof(buffer)) { if (len >= sizeof(buffer)) {
size_t len2;
char *buf = PyMem_Malloc(len); char *buf = PyMem_Malloc(len);
if (buf == NULL) if (buf == NULL)
return PyErr_NoMemory(); return PyErr_NoMemory();
confstr(name, buf, len); len2 = confstr(name, buf, len);
assert(len == len2);
result = PyUnicode_DecodeFSDefaultAndSize(buf, len-1); result = PyUnicode_DecodeFSDefaultAndSize(buf, len-1);
PyMem_Free(buf); PyMem_Free(buf);
} }