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Re: problems substituting 'jobs' in a bash script
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From: |
Eric Blake |
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Subject: |
Re: problems substituting 'jobs' in a bash script |
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Date: |
Thu, 21 Feb 2008 22:24:35 -0700 |
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User-agent: |
Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.9) Gecko/20071031 Thunderbird/2.0.0.9 Mnenhy/0.7.5.666 |
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According to Robert Whent (rwhent) on 2/21/2008 10:59 AM:
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| JOBS=`jobs`
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| echo $JOBS
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| this return nothing at all
As well it should. jobs returns information about the current shell's
jobs. But inside ``, the command is executed in a subshell. The subshell
has no child processes of its own (but is one of the children of the
parent collecting the `` output). And for this reason, jobs has to be a
shell builtin rather than an external application.
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| I have also trawled the web and can find no reports of any issues ?
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Try reading this link, especially under Application Usage
http://www.opengroup.org/onlinepubs/009695399/utilities/jobs.html
- --
Don't work too hard, make some time for fun as well!
Eric Blake ebb9@byu.net
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