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I am updating my ports in MacPorts which may take a day. I have changed my dot -files. I would like to test them without shutting the updates down.

I have ^Z the installation and restarted my shell. However, I am using Screen such that my settings will not be reset until I detach the whole Screen. This would however stop the installation which I do not want.

I know that there is a command which allows me to put the installation to "background". However, I am not sure

  • which is the name of this command (it seems not to be bg)

How can you put the installation to background?

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This is a similar question: stackoverflow.com/questions/796079/… – Masi Jul 2 '09 at 19:19
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3 Answers

up vote 1 down vote accepted

Probably you want bg and then disown. This is much as if you'd run the install under nohup beforehand.

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I have no manual for bg and disown. I use OS/X. – Masi Jul 2 '09 at 19:11
I use Zsh. --- This is a great answer about disown: stackoverflow.com/questions/603696/… – Masi Jul 2 '09 at 19:22
The new question is at here: serverfault.com/questions/35246/… – Masi Jul 2 '09 at 19:28
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@masi: 'jobs' command. – chaos Jul 2 '09 at 19:29
@chaos: jobs shows me a list of current processes in stack. --- Please, see the bottom of the message: serverfault.com/questions/35232/… – Masi Jul 2 '09 at 19:33
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up vote 3 down vote

You should just be able to do a

. .bashrc and have it take effect immediately.

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I run everything on Screen. --- This may be the reason your command does notwork. – Masi Jul 2 '09 at 19:17
You need to be in the same directory as your .bashrc file for this command to work. – k3ri Jul 2 '09 at 19:43
Which version of OSX are you running, anyways? – k3ri Jul 2 '09 at 19:46
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up vote 0 down vote

It seems that my process is now at background.

I did

...
zsh: suspended  sudo port upgrade outdated
$bg                                                                            ~ 1
[1]  + continued  sudo port upgrade outdated
$disown                                                                        ~ 1
$jobs                                                                          ~ 
$                                                                              ~

[edit]

My command does not work.

Please see what I get after jobs command

...
$disown                                                                                                                                                 ~ 1
$jobs                                                                                                                                                    ~ 
$--->  Building python25                                                                                                                                 ~ 
--->  Staging python25 into destroot
--->  Deactivating python25 @2.5.4_2+darwin_9+macosx    bg5latex      bg5pdflatex 
--->  Installing python25 @2.5.4_6+darwin_9+macosx
--->  Activating python25 @2.5.4_6+darwin_9+macosx

To fully complete your installation and make python 2.5 the default, please run

        sudo port install python_select  
        sudo python_select python25

--->  Cleaning python25
--->  Fetching iso-codes
--->  Attempting to fetch iso-codes-3.10.1.tar.bz2 from http://arn.se.distfiles.macports.org/iso-codes
--->  Verifying checksum(s) for iso-codes
--->  Extracting iso-codes
--->  Configuring iso-codes
--->  Building iso-codes

It seems to put stuff to my shell from background. This is strange since I can clear and then run my own commands.

It does not put nothing at the moment to my screen. It apparently needs some time to make it again.

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Your backgrounded process still has your terminal as its stdout/stderr. You can redirect those using > and 2> when first running the process (or if you use nohup it'll do it for you by default). I don't know of any way to change a process's stdout/stderr from outside it after it's started, but that doesn't mean there isn't one. – chaos Jul 2 '09 at 19:39
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