New submission from ollieparanoid:
After mounting a folder to another folder on the same filesystem with mount
--bind, os.path.ismount() still returns False on the destination folder
(although there is a mountpoint).
A shell script to reproduce this is below.
(Maybe this can be fixed by using /proc/mounts (if available, may not be the
case eg. for chroots) for verifying, if the destination folder is really a
mountpoint on POSIX/Linux. Although I am not sure how consistent that is
through POSIX.)
---
#!/bin/sh
# Output:
# contents of /tmp/destination (should have test.py -> obviously mounted):
# test.py
# os.path.ismount(): False
# create source and destination folders
source=/tmp/source
destination=/tmp/destination
mkdir -p $source $destination
# add the python script in the source folder
echo "import os.path" >> $source/test.py
echo "print('os.path.ismount(): ' + str(os.path.ismount('$destination')))" >>
$source/test.py
# do the mount --bind
sudo mount --bind $source $destination
echo "contents of $destination (should have test.py -> obviously mounted):"
ls $destination
# show the python bug
python3 $source/test.py
# clean up
sudo umount $destination
rm $source/test.py
rm -d $source $destination
----------
components: Library (Lib)
messages: 288863
nosy: Oliver Smith
priority: normal
severity: normal
status: open
title: os.path.ismount() always returns false for mount --bind on same
filesystem
type: behavior
versions: Python 3.7
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Python tracker <[email protected]>
<http://bugs.python.org/issue29707>
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