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tody4
n00b
Joined: 13 Sep 2005
Posts: 53
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 Posted: Fri Mar 03, 2006 4:17 pm Post subject: Learning to bash - unmasking script |
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I'm trying to write one of my first bash scripts, taking some information from a post in the Desktop Environments sub-forum, and I can't seem to get it to work for some reason. The output is always the command instead of a list of packages (in this case). Not sure if i'm just not using the variables correctly or what. Any help would be appreciated. Eventually I want to build some intelligence into it so that the script will check the package.keywords / package.unmask file for the current package name and if exists, skip adding to the file, otherwise add to the file, but that's for another time. Right now all I want is for a list of packages to be added to the package.keywords file and I'll write another one to do something similar for package.unmask.
| Code: |
#! /bin/bash
if [ -z $1 ]; then
echo "USAGE umask <argument>";
exit 1
fi
for i in 'emerge -p $1 | grep ebuild \
| tr -s | cut -f 4';do
echo "Unmasking Package $i"
# echo ">=$i ~x86" >> /etc/portage/package.keywords;
done
exit 0
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Unne
l33t
Joined: 21 Jul 2003
Posts: 616
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| Posted: Fri Mar 03, 2006 4:26 pm Post subject: |
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You have the command in single quotes, which means the script treats it as a string. You need to put it in backticks ( `` ) so the command is executed.
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Earthwings
Bodhisattva
Joined: 14 Apr 2003
Posts: 7753
Location: Germany
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| Posted: Fri Mar 03, 2006 4:33 pm Post subject: |
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| Unne wrote: | | You have the command in single quotes, which means the script treats it as a string. You need to put it in backticks ( `` ) so the command is executed. |
One of the reasons I always use $(command) instead.
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tody4
n00b
Joined: 13 Sep 2005
Posts: 53
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| Posted: Fri Mar 03, 2006 4:39 pm Post subject: [solved] |
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| That's what it was, thanks for the help. |
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sparks
Guru
Joined: 05 Mar 2003
Posts: 331
Location: Nashville, TN
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| Posted: Sat Mar 04, 2006 7:42 pm Post subject: Re: Learning to bash - unmasking script |
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| tody4 wrote: | I'm trying to write one of my first bash scripts, taking some information from a post in the Desktop Environments sub-forum, and I can't seem to get it to work for some reason. The output is always the command instead of a list of packages (in this case). Not sure if i'm just not using the variables correctly or what. Any help would be appreciated. Eventually I want to build some intelligence into it so that the script will check the package.keywords / package.unmask file for the current package name and if exists, skip adding to the file, otherwise add to the file, but that's for another time. Right now all I want is for a list of packages to be added to the package.keywords file and I'll write another one to do something similar for package.unmask.
| Code: |
#! /bin/bash
if [ -z $1 ]; then
echo "USAGE umask <argument>";
exit 1
fi
for i in 'emerge -p $1 | grep ebuild \
| tr -s | cut -f 4';do
echo "Unmasking Package $i"
# echo ">=$i ~x86" >> /etc/portage/package.keywords;
done
exit 0
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I like the idea behind this. However I am not a programmer, and could not get this script to work even with the back ticks (``). With my _very_ limited knowledge about bash scripting I tried to make a script that worked for me, this is what I came up with.
| Code: |
#! /bin/bash
if [ "$UID" -ne "0" ] ; then
echo "Only root can use this script";
exit 1
fi
if [ -z $1 ]; then
echo "USAGE: umask <argument>";
exit 1
fi
for i in `emerge -p $1 | grep ebuild | cut -b 17-70`
do echo ">=$i ~amd64 [*Added to packages.keywords*]"
echo ">=$i ~amd64" >> /etc/portage/package.keywords;
done
exit 0
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Now, I'm sure someone is going to say "WTF!? why did you go about it that way?", and honestly its because I don't know any better. If anyone could offer suggestions as how to improve these scripts it would be appreciated.
Also having the intellegence built in to know whether or not a package is already in package.keywords would be nice. Any takers?
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