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#1663329: add os.closerange() to close a range of fds,

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ignoring errors, and use this in subprocess to speed up
subprocess creation in close_fds mode. Patch by Mike Klaas.
This commit is contained in:
Georg Brandl 2008-01-19 20:22:13 +00:00
parent 15ce880cc8
commit 309501a617
5 changed files with 44 additions and 7 deletions
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19
Modules/posixmodule.c
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@ -6156,6 +6156,24 @@ posix_close(PyObject *self, PyObject *args)
}
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 @@ static PyMethodDef posix_methods[] = {
#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__},