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replace string in variable

Posted on 2004-10-20
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Last Modified: 2010-04-21
hello, all

  i am coding a linux shell scripts, where a variabe "X1=ABCEDFG" is defined, how can i use other string, like "./",  to replace "X1=" ?

thanx in advance

kim
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Question by:kim_wei
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Expert Comment

by:liddler
ID: 12358260
Not sure I understand your question.
Do you want a variable called "./" ?
If so I don't think you can as they are reserved metacharacters.
If not can you explain more?
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Author Comment

by:kim_wei
ID: 12359410
hello, liddler,
   
  a piece of code like following,

...
DEF_STR="X1=ABCED"
echo $DEF_STR
...

  i just want to use "./" to replace "X1=", so it would look like,

DEF_STR="./ABCED", hopefully it is clear.

thanx
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LVL 18

Expert Comment

by:liddler
ID: 12359569
you can use sed
sed 's/X1=/\.\//g' script.sh > script1.sh

This will replace the string X1= with ./ wherever it appears in the file script.sh and save the output in script1.sh
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Author Comment

by:kim_wei
ID: 12367286
hello, liddler

   i really don't want to have additional file generated in my code, is it possible to perform this replacement only in scripts scope?

thanx
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LVL 18

Accepted Solution

by:
liddler earned 50 total points
ID: 12367383
No,
but you can do:
sed 's/X1=/\.\//g' script.sh > script1.sh && mv script1.sh script.sh
to rename script1.sh back to script.sh
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