#1663329: add os.closerange() to close a range of fds,
ignoring errors, and use this in subprocess to speed up
subprocess creation in close_fds mode. Patch by Mike Klaas.
diff --git a/Modules/posixmodule.c b/Modules/posixmodule.c
index 696df0d..0038703 100644
--- a/Modules/posixmodule.c
+++ b/Modules/posixmodule.c
@@ -6156,6 +6156,24 @@
}
+PyDoc_STRVAR(posix_closerange__doc__,
+"closerange(fd_low, fd_high)\n\n\
+Closes all file descriptors in [fd_low, fd_high), ignoring errors.");
+
+static PyObject *
+posix_closerange(PyObject *self, PyObject *args)
+{
+ int fd_from, fd_to, i;
+ if (!PyArg_ParseTuple(args, "ii:closerange", &fd_from, &fd_to))
+ return NULL;
+ Py_BEGIN_ALLOW_THREADS
+ for (i = fd_from; i < fd_to; i++)
+ close(i);
+ Py_END_ALLOW_THREADS
+ Py_RETURN_NONE;
+}
+
+
PyDoc_STRVAR(posix_dup__doc__,
"dup(fd) -> fd2\n\n\
Return a duplicate of a file descriptor.");
@@ -8451,6 +8469,7 @@
#endif /* HAVE_TCSETPGRP */
{"open", posix_open, METH_VARARGS, posix_open__doc__},
{"close", posix_close, METH_VARARGS, posix_close__doc__},
+ {"closerange", posix_closerange, METH_VARARGS, posix_closerange__doc__},
{"dup", posix_dup, METH_VARARGS, posix_dup__doc__},
{"dup2", posix_dup2, METH_VARARGS, posix_dup2__doc__},
{"lseek", posix_lseek, METH_VARARGS, posix_lseek__doc__},