df hanging will cause xymon-client to hang.

I suppose the workaround for the problem can be - rewrite shell script calling df.
1) call  df ... command  a) in background   b) redirecting output to some temp-file  c) saving child process PID to variable

2) checking in loop the process still running
        if still running (can check with ps command)
        then sleep for 1 sec. or so and go to next check iteration
        if not running - exit loop and check the output
        if count of checks (iterations) more then N (defined in configuration), then end checking - raise the red status for disk

3) df is called twice  - for space and for inodes - then implement it as shell function


Best regards,

Andrey Chervonets
SIA CoMinder
http://www.cominder.eu/