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Full Discussion: How to check if a file is open in editor?
Top Forums UNIX for Beginners Questions & Answers How to check if a file is open in editor? Post 303005509 by Don Cragun on Wednesday 18th of October 2017 08:45:37 PM
Old 10-18-2017
Forget putting your code in a script!

What happens when you run the following commands directly in your shell:
Code:
gedit somefile& PID=$!
wait $PID

where somefile is the name of some file that you can edit? If this didn't work for you when run outside of a script, what makes you think it should work when you run it inside a script?

As I said in post #12 in this thread:
Quote:
How is it that you expect to edit a file when your editor is running in the background and can't read editing instructions from the terminal?
Jobs run in the background are blocked if they try to read from or write to their controlling terminal. The wait command that you are executing is not reporting that gedit terminated; it is reporting that gedit was stopped (probably by a SIGTTOU or SIGTTIN signal).

Maybe issuing the following command line in a shell would be instructive:
Code:
gedit somefile& PID=$!; sleep 10; jobs $PID; sleep 10; fg $PID

This User Gave Thanks to Don Cragun For This Post:
cherryTango
 

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LEARN ABOUT DEBIAN

fiu-ctrl

fiu-ctrl(1)						      General Commands Manual						       fiu-ctrl(1)

NAME

       fiu-ctrl - a script to remote control programs using libfiu

SYNOPSIS

       fiu-ctrl [options] PID [PID ...]

DESCRIPTION

       fiu-ctrl is a script to enable/disable failure points in running programs that are using libfiu(3).

       Programs are usually launched using fiu-run(1), which enables libfiu's remote control capabilities without the need to modify the program's
       code.

       For additional documentation, go to the project's website at http://blitiri.com.ar/p/libfiu.

OPTIONS

       -c command
	      Run the given libfiu remote control command before executing the program (see below for reference).

       -f ctrlpath
	      Set the default prefix for remote control over named pipes. Defaults to "$TMPDIR/fiu-ctrl", or "/tmp/fiu-ctrl" if "$TMPDIR"  is  not
	      set, which is the usually correct for programs launched using fiu-run(1).

       Remote control commands are of the form "command param1=value1,param2=value2".  Valid commands are:

       'enable name=NAME'
	      Enables the NAME failure point unconditionally.

       'enable_random name=NAME,probability=P'
	      Enables the NAME failure point with a probability of P.

       'disable name=NAME'
	      Disables the NAME failure point.

       All of the enable* commands can also optionally take failnum and failinfo parameters, analogous to the ones taken by the C functions.

EXAMPLES

       The  following  command will tell the process running with PID 12345 to enable the failure point posix/io/read with a 25% of probability to
       fail, and the failure point libc/mm/malloc with a 5% of probability to fail:

	      fiu-ctrl -c 'enable_random name=posix/io/*,probability=0.25' 
		       -c 'enable_random name=libc/mm/*,probability=0.05' 12345

       And the following will tell the same process to disable the previously enabled failure point posix/io/read:

	      fiu-ctrl -c 'disable name=posix/io/read' 12345

SEE ALSO

       libfiu(3), fiu-run(1).

BUGS

       If you want to report bugs, or have any questions or comments, just let me know at albertito@blitiri.com.ar.  For  more	information  about
       libfiu, you can go to http://blitiri.com.ar/p/libfiu.

								    16/Jun/2009 						       fiu-ctrl(1)
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