Unable to disown process

Andy Koppe andy.koppe@gmail.com
Wed Jul 6 21:01:00 GMT 2011


On 6 July 2011 21:15, Andrew wrote:
> On 7/6/2011 12:12 PM, Andy Koppe wrote:
>> You can use the 'setsid' utility from the util-linux package to invoke
>> a program in its own session, i.e. without connection to the terminal
>> it is invoked from. For example:
>>
>> setsid ssh -NL 1119:news.mozilla.org:119 \
>>          -L 2119:news.gmane.org:119 \
>>          -L 3119:nntp.perl.org:119 \
>>          andrew@defaria.com
>>
>> No need for 'nohup', redirections, backgrounding, or 'disown' with this.
>
> Actually I still need backgrounding as without it my ~/bin/tunnel just hangs
> on the setsid command...

Hmm, I'm afraid I don't know why that happens when setsid is invoked
from a script.

This returns immediately:

$ setsid sleep 10

As does this:

$ bash -c 'setsid sleep 10'

But this doesn't:

$ echo 'setsid sleep 10' > sleep.sh; bash sleep.sh

Andy

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