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sshsetvolumeosascriptremote-management

osascript set volume isn't working via ssh

here is my situation.

User A is currently logged on Computer A.

User B logs into Computer A via ssh.

User B runs via terminal a osascript (osascript -e 'set volume 0')

here is my error log:

Oct 20 13:25:17  osascript[29389] <Error>: Set a breakpoint at CGSLogError to catch errors as they are logged.
Oct 20 13:25:17  osascript[29389] <Error>: This user is not allowed access to the window system right now.
Oct 20 13:25:17  osascript[29389] <Warning>: CGSConnectionByID: 0 is not a valid connection ID.
Oct 20 13:25:17  osascript[29389] <Warning>: CGSConnectionByID: 0 is not a valid connection ID.
Oct 20 13:25:17  osascript[29389] <Warning>: CGSConnectionByID: 0 is not a valid connection ID.
2015-10-20 13:25:17.196 osascript[29389:1503684] CFPasteboardRef CFPasteboardCreate(CFAllocatorRef, CFStringRef) : failed to create global data
2015-10-20 13:25:17.197 osascript[29389:1503684] CFPasteboardRef CFPasteboardCreate(CFAllocatorRef, CFStringRef) : failed to create global data
2015-10-20 13:25:17.197 osascript[29389:1503684] CFPasteboardRef CFPasteboardCreate(CFAllocatorRef, CFStringRef) : failed to create global data
2015-10-20 13:25:17.197 osascript[29389:1503684] CFPasteboardRef CFPasteboardCreate(CFAllocatorRef, CFStringRef) : failed to create global data
Oct 20 13:25:17  osascript[29389] <Warning>: CGSConnectionByID: 0 is not a valid connection ID.
_RegisterApplication(), FAILED TO establish the default connection to the WindowServer, _CGSDefaultConnection() is NULL.
Oct 20 13:25:17  osascript[29389] <Warning>: CGSConnectionByID: 0 is not a valid connection ID.
Oct 20 13:25:17  osascript[29389] <Warning>: CGSConnectionByID: 0 is not a valid connection ID.
Oct 20 13:25:17  osascript[29389] <Warning>: CGSConnectionByID: 0 is not a valid connection ID.

Side notes User B is set as admin

Once upon a time, I recall executing this situation before without any errors. Not sure if this is a ARD setting with privileges?

Solution

  • I've found an alternative which seems to work...

    If I add

    sudo -u username before the osascript -e command, then it works.

    example

    sudo -u username osascript -e 'set volume 0'

    from what a read, seems that apple does not allow users to open applications via ssh session while another user is logged in. Must be logged in as the current user to run osascripts, otherwise, add the following command sudo -u username