Andy Isaacson created HDFS-4139:
-----------------------------------
Summary: fuse-dfs RO mode still allows file truncation
Key: HDFS-4139
URL: https://issues.apache.org/jira/browse/HDFS-4139
Project: Hadoop HDFS
Issue Type: Bug
Components: fuse-dfs
Affects Versions: 2.0.2-alpha
Reporter: Andy Isaacson
Mounting a fuse-dfs in readonly mode with "-oro" still allows the user to
truncate files.
{noformat}
$ grep fuse /etc/fstab
hadoop-fuse-dfs#dfs://ubu-cdh-0.local /export/hdfs fuse noauto,ro 0 0
$ sudo mount /export/hdfs
$ hdfs dfs -ls /tmp
...
-rw-r--r-- 3 ubuntu hadoop 4 2012-11-01 14:18 /tmp/blah.txt
$ echo foo > /export/hdfs/tmp/blah.txt
-bash: /export/hdfs/tmp/blah.txt: Permission denied
$ hdfs dfs -ls /tmp
...
-rw-r--r-- 3 ubuntu hadoop 0 2012-11-01 14:28 /tmp/blah.txt
$ ps ax | grep dfs
...
13639 ? Ssl 0:02 /usr/lib/hadoop/bin/fuse_dfs dfs://ubu-cdh-0.local
/export/hdfs -o ro,dev,suid
{noformat}
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