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A child process which survives the parent's death (for sure)

Terminal - A child process which survives the parent's death (for sure)
( command & )
2011-01-07 19:06:30
User: wiburg
Functions: command
24
A child process which survives the parent's death (for sure)

Test scenario:

* Open xterm (or konsole, ...)

* Start xeyes with: ( xeyes & )

* Close the xterminal

The xeyes process should be still running.

Alternatives

There are 2 alternatives - vote for the best!

Terminal - Alternatives
command &!

Know a better way?

If you can do better, submit your command here.

What others think

{ list; } &

Comment by RanyAlbeg 308 weeks and 1 day ago

{ list; } & doesn't work here.

I started xeyes this way. After closing the terminal, xeyes was terminated.

This doesn't happen, if you start it with ( xeyes & ).

Comment by wiburg 308 weeks and 1 day ago

Wow. How does it work? Does it fork shell one additional time?

Comment by lockie 308 weeks and 1 day ago

Yes, you are right.

But if you are running a script which consist of { list; } &

it acts the same.

lockie, the following is taken from ``man bash' ' :

(list) list is executed in a subshell environment.

Comment by RanyAlbeg 308 weeks and 1 day ago

Just to add my $0.02, it starts the process in the background in its own sub-shell. So it won't die if the spawning shell of the sub-shell is terminated.

I always used to hup my commands to keep them alive even if the parent dies. However, I like this better! :)

Comment by scilec 308 weeks ago

wouldn't

command & exit

also work?

Comment by capncanuck 307 weeks and 6 days ago

What's wrong with

nohup xeyes&
Comment by dennisw 307 weeks and 6 days ago

nice one! :) will definitely put to use

Comment by BruceLEET 307 weeks and 4 days ago

Zsh has an even nicer way to do the same

command &!
Comment by adambyrtek 307 weeks and 2 days ago

nohup leaves all those annoying "nohup.out" files that I don't really care for. they pollute my filesystem if left unchecked

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Comment by sanjunn 27 weeks and 4 days ago

Your point of view

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