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#1 2009-03-10 19:50:41
- deltaecho
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- From: Georgia (USA)
- Registered: 2008-08-06
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Why won't `bash -c "echo 1 2 3 | awk '{print $1}'"' print `1'?[SOLVED]
Why doesn't `bash -c "echo 1 2 3 | awk '{print $1}'"' print `1' instead of `1 2 3'? It seems to be a bug in `awk', because running `bash -c "echo 1 2 3 | sed -e 's|1|5|'"' prints `5 2 3'.
Last edited by deltaecho (2009-03-10 20:20:01)
Dylon
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#2 2009-03-10 19:54:58
- andre.ramaciotti
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Re: Why won't `bash -c "echo 1 2 3 | awk '{print $1}'"' print `1'?[SOLVED]
I'm not sure if it's a awk bug:
echo 1 2 3 | awk '{print $1}'
1
zsh -c "echo 1 2 3 | awk '{print $1}'"
1 2 3(lambda ())
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#3 2009-03-10 19:55:38
- abesto
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- Registered: 2009-03-05
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Re: Why won't `bash -c "echo 1 2 3 | awk '{print $1}'"' print `1'?[SOLVED]
umm...
abesto ~ $ echo 1 2 3 | awk '{print $1}'
1It's fine here. I don't think the problem is with awk.
Last edited by abesto (2009-03-10 19:56:25)
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#4 2009-03-10 19:57:31
- deltaecho
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- From: Georgia (USA)
- Registered: 2008-08-06
- Posts: 185
Re: Why won't `bash -c "echo 1 2 3 | awk '{print $1}'"' print `1'?[SOLVED]
Running
$ echo 1 2 3 | awk '{print $1}'does work, but running
$ bash -c "echo 1 2 3 | awk '{print $1}'"does not.
Dylon
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#5 2009-03-10 20:16:08
- Procyon
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- Registered: 2008-05-07
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Re: Why won't `bash -c "echo 1 2 3 | awk '{print $1}'"' print `1'?[SOLVED]
The $1 is interpreted as an empty string, even though it is in single quotes, so you are running echo 1 2 3 | awk '{print }'
Instead try this:
$ bash -c "echo 1 2 3 | awk '{print \$1}'"
1
Also see bash -x -c
--> bash -x -c "echo 1 2 3 | awk '{print $1}'"
+ echo 1 2 3
+ awk '{print }'
1 2 3
--> bash -x -c 'echo 1 2 3 | awk "{print $1}"'
+ echo 1 2 3
+ awk '{print }'
1 2 3
--> bash -x -c "echo 1 2 3 | awk '{print \$1}'"
+ awk '{print $1}'
+ echo 1 2 3
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#6 2009-03-10 20:18:25
- deltaecho
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- From: Georgia (USA)
- Registered: 2008-08-06
- Posts: 185
Re: Why won't `bash -c "echo 1 2 3 | awk '{print $1}'"' print `1'?[SOLVED]
The $1 is interpreted as an empty string, even though it is in single quotes, so you are running echo 1 2 3 | awk '{print }'
Instead try this:
$ bash -c "echo 1 2 3 | awk '{print \$1}'"
1Also see bash -x -c
--> bash -x -c "echo 1 2 3 | awk '{print $1}'" + echo 1 2 3 + awk '{print }' 1 2 3 --> bash -x -c 'echo 1 2 3 | awk "{print $1}"' + echo 1 2 3 + awk '{print }' 1 2 3 --> bash -x -c "echo 1 2 3 | awk '{print \$1}'" + awk '{print $1}' + echo 1 2 3 1
That works! Thanks @Procyon!
Dylon
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