Red Hat Bugzilla – Bug 995719
sandbox default window manager is not as man page describes
Last modified: 2014-02-05 17:15:54 EST
Description of problem:
man sandbox says:
Select alternative window manager to run within sandbox -X.
Default to /usr/bin/matchbox-window-manager.
sandbox is not observing the documented default for -W. The man page describes a better scenario than what sandbox implements.
The following two sandbox invocations demonstrate a significant difference between omitting -W and specifying -W as the stated default. In practice, firefox is unusable without -W, but works ok with an explicit statement of the stated default of -W.
sandbox -X -t sandbox_web_t /usr/bin/firefox
sandbox -X -t sandbox_web_t -W /usr/bin/matchbox-window-manager /usr/bin/firefox
Version-Release number of selected component (if applicable):
$ rpm -q policycoreutils matchbox-window-manager firefox
How reproducible: Consistently.
Steps to Reproduce:
1. Open sandbox with default window manager to run firefox using the first invocation above. A firefox window opens, titled "Sandbox...". In firefox, choose Tools Downloads. Now you are stuck! The Downloads window opened maximized in the sandbox, and you have no way to dismiss Downloads short of closing the whole sandbox. Close the sandbox.
2. Open sandbox with -W reinforcing the stated default window manager, the second invocation above. Firefox has a title bar and close box within the sandbox window. In firefox, choose Tools Downloads. Downloads too has a title and close box. Use the Downloads window's close box to return to firefox.
Different outcomes result from (a) omitting -W, and (b) specifying -W as its documented default value.
The same outcome should result from (a) omitting -W, and (b) specifying -W as its documented default value.
Changing release to 18. This was observed in Fedora 18.
In Fedora 19 sandbox and its man page agree - and Firefox gets stuck in Downloads with -W or without it.
In 19 the default window manager is openbox. In 18 it should be Matchbox-window-manager in both cases. Is you do the case without -w do you see Matchbox-window-manager running?
In Fedora 18:
$ ps aux | grep matchbox
$ sandbox -X -t sandbox_web_t /usr/bin/firefox &
$ ps aux | grep matchbox
turnip 2541 0.2 0.0 106116 6376 ? S 20:01 0:00 /usr/bin/matchbox-window-manager -use_titlebar no
It is matchbox with or without -W, but different options. The sandbox default apparently adds an option, "-use_titlebar no", that causes unhappiness with Firefox and is not in the man page's statement of the default.
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