IZ3061: improve Ctrl-Z handling in builtin interactive jobs with "-pty yes" option set
|Reported by:||pollinger||Owned by:|
[Imported from gridengine issuezilla http://gridengine.sunsource.net/issues/show_bug.cgi?id=3061]
Issue #: 3061 Platform: All Reporter: pollinger (pollinger) Component: gridengine OS: All Subcomponent: clients Version: 6.2 CC: None defined Status: STARTED Priority: P2 Resolution: Issue type: ENHANCEMENT Target milestone: --- Assigned to: shaas (shaas) QA Contact: roland URL: * Summary: improve Ctrl-Z handling in builtin interactive jobs with "-pty yes" option set Status whiteboard: Attachments: Issue 3061 blocks: Votes for issue 3061: Opened: Wed Jun 17 09:58:00 -0700 2009 ------------------------ Pressing Ctrl-Z in an interactive job with "-pty yes" option set causes a behaviour that is obvious from a technical point of view, but is not intuitive for the user. If the user submits # qrsh -pty yes sleep 3600 and presses Ctrl-Z, the '^Z' character is not interpreted locally, it is sent to the remote host where the pty interprets it and sends a SIGTSTP signal to the "sleep" command. Because the "sleep" command was started in a shell in command mode ("/bin/sh -c sleep 3600"), this remote shell doesn't provide a prompt. Therefore it's not possible to pull the "sleep" command back in the foreground. Of course the local shell doesn't provide a prompt, too, because here is still the "qrsh" command running. This leaves the user with a local terminal window that seems to accept no input anymore and a remote shell and command that are suspended and will never finish. ------- Additional comments from crei Thu Aug 13 09:34:38 -0700 2009 ------- Setting Priority to P2 ------- Additional comments from shaas Fri Jan 15 02:07:34 -0700 2010 ------- I'll fix it. ------- Additional comments from shaas Fri Jan 15 02:09:45 -0700 2010 ------- Like the ssh, the "qrsh" client could provide a special escape character that tells it that a following control character should not be sent to the remote host, but should be interpreted by the local "qrsh" client. ssh defines e.g.: ~^Z - Suspend the local client
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