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SF patch #460805 by Chris Gonnerman: Support for unsetenv()

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This adds unsetenv to posix, and uses it in the __delitem__ method of
os.environ.

(XXX Should we change the preferred name for putenv to setenv, for
consistency?)
This commit is contained in:
Guido van Rossum 2001-10-19 01:31:59 +00:00
parent b6c1d5239c
commit c524d952da
6 changed files with 81 additions and 19 deletions
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34
Modules/posixmodule.c
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@ -4083,6 +4083,37 @@ posix_putenv(PyObject *self, PyObject *args)
}
#endif /* putenv */
#ifdef HAVE_UNSETENV
static char posix_unsetenv__doc__[] =
"unsetenv(key) -> None\n\
Delete an environment variable.";
static PyObject *
posix_unsetenv(PyObject *self, PyObject *args)
{
char *s1;
if (!PyArg_ParseTuple(args, "s:unsetenv", &s1))
return NULL;
unsetenv(s1);
/* Remove the key from posix_putenv_garbage;
* this will cause it to be collected. This has to
* happen after the real unsetenv() call because the
* old value was still accessible until then.
*/
if (PyDict_DelItem(posix_putenv_garbage,
PyTuple_GET_ITEM(args, 0))) {
/* really not much we can do; just leak */
PyErr_Clear();
}
Py_INCREF(Py_None);
return Py_None;
}
#endif /* unsetenv */
#ifdef HAVE_STRERROR
static char posix_strerror__doc__[] =
"strerror(code) -> string\n\
@ -5667,6 +5698,9 @@ static PyMethodDef posix_methods[] = {
#ifdef HAVE_PUTENV
{"putenv", posix_putenv, METH_VARARGS, posix_putenv__doc__},
#endif
#ifdef HAVE_UNSETENV
{"unsetenv", posix_unsetenv, METH_VARARGS, posix_unsetenv__doc__},
#endif
#ifdef HAVE_STRERROR
{"strerror", posix_strerror, METH_VARARGS, posix_strerror__doc__},
#endif