Command interpretation issue in Sed script file

angel115 · 04-20-2006, 04:58 PM

Hi

Her is the issue
when i type my script on the command line it's working

Code:

$echo "The date of today is: 10/02/05 |sed -e "/date/s/[0-9][0-9]\/[0-9][0-9]\/[0-9][0-9]/$(date '+%d\/%m\/%y')/"
$The date of today is: 20/04/06

But when i put this command line in a sed script file, it doesn't take the command but as a string. So i have this kind of output

Code:

$echo "The date of today is: 10/02/05 |sed -f my-sed-script.script
$The date of today is: $(date '%d\/%m\/%y')

here is what i put inside the file "my-sed-script.script"

Code:

#!/bin/sed -f
/date/s/[0-9][0-9]\/[0-9][0-9]\/[0-9][0-9]/$(date '%d\/%m\/%y')/

angel115 · 04-20-2006, 04:59 PM

I have try the following as well in the file "my-sed-script.script" with out success

Code:

#!/bin/sed -f
/date/s/[0-9][0-9]\/[0-9][0-9]\/[0-9][0-9]/${date '%d\/%m\/%y'}/

Code:

#!/bin/sed -f
/date/s/[0-9][0-9]\/[0-9][0-9]\/[0-9][0-9]/(date '%d\/%m\/%y')/

Code:

#!/bin/sed -f
/date/s/[0-9][0-9]\/[0-9][0-9]\/[0-9][0-9]/{date '%d\/%m\/%y'}/

ataraxia · 04-20-2006, 05:38 PM

You're missing the + from in front of the date format.

Code:

#!/bin/sed -f
/date/s/[0-9][0-9]\/[0-9][0-9]\/[0-9][0-9]/$(date '+%d\/%m\/%y')/

aluser · 04-20-2006, 06:39 PM

I don't think sed can interpret $(...). Your shell is doing that on the command line before sed even sees the script.

In the file, sed sees the $(...) stuff and doesn't do anything special with it.

angel115 · 04-21-2006, 05:14 PM

Hi Aluser

Thanks for this clarification, So if i understand well if i define the variable first it should be possible to use the value of this variable in my sed script? But how? because it still take my variable as a string

Code:

#!/bin/sed -f
/date/s/[0-9][0-9]\/[0-9][0-9]\/[0-9][0-9]/'$DATEVAR'/g

give me the output:

Code:

$echo "The date of today is: 10/02/05 |sed -f my-sed-script.script
$The date of today is: '$DATEVAR'

homey · 04-21-2006, 05:56 PM

Would you settle for bash?

Code:

#!/bin/bash

echo "The date of today is: 10/02/05" | \
sed -e '/date/s/[0-9][0-9]\/[0-9][0-9]\/[0-9][0-9]/'$(date '+%d\/%m\/%y')'/'

dive · 04-21-2006, 06:26 PM

Or even:

Code:

#! /bin/bash
echo "Today's date is:" `date "+%d/%m/%y"`

homey · 04-21-2006, 06:37 PM

That's too easy! I think it was an exercise in using sed.

You could cut the sed down abit...

Code:

#!/bin/bash

echo "The date of today is: 10/02/05" | \
sed -e '/date/s/[0-9]*\/[0-9]*\/[0-9]*/'$(date '+%d\/%m\/%y')'/'
or
sed -e '/date/s/..\/..\/../'$(date '+%d\/%m\/%y')'/'
or
sed -e '/date/s/..\/.*/'$(date '+%d\/%m\/%y')'/'

angel115 · 04-21-2006, 06:42 PM

Hi

Yes, i would do that if i could.... But unfortunately the environement where i'm using it doesn't alow me to execute bash script.

So i absolutly need to put this in a sed script.

I just need to know if it's possible to use a variable in a sed script. and if it's possible how?

Kind regards

Angel.

dive · 04-21-2006, 07:26 PM

But you must have some shell? Maybe just sh even?