Problem using SED in unix shell programming

[Maplologue]

Hi every body,
I have a problem with the UNIX sed command. I have a file named Script that contains those instructions.

sed s/old1/new1/g SourceFile >Result
sed s/old2/new2/g SourceFile >Result
sed s/old3/new3/g SourceFile >Result

And when I execute this file, only the last command is taken into account not the first 2.

Does anyone know what the matter is?

 

[vgersh99]

sed 's/old1/new1/g;s/old2/new2/g;s/old3/new3/g' SourceFile >Result vlad
+----------------------------+
| #include<disclaimer.h> |
+----------------------------+

 

[mrn]

Your appear to changing the same data and sending it to the same file

do

sed s/old1/new1/g SourceFile > 1
sed s/old2/new2/g 1 > 2
sed s/old3/new3/g 2 > Result



--
| Mike Nixon
| Unix Admin
|

http://www.parcandgo.co.uk

----------------------------

 

[iribach]

sed 's/old\([123]\)/new\1/g' SourceFile >Result

 

[vgersh99]

iribach,
one would assume that the 'new' and the 'old' patterns are just the mnemonic place-holders. vlad
+----------------------------+
| #include<disclaimer.h> |
+----------------------------+

 

[iribach]

vgersh99,
my version is just a shorthand of yours.
in your version are 'old' and 'new' mnemonic ...

Maplologue, it will work IF (for unix beginners only)

sed 's/old1/new1/g' SourceFile >Result
[ -s Result ] && mv Result SourceFile || exit
sed 's/old2/new2/g' SourceFile >Result
[ -s Result ] && mv Result SourceFile || exit
sed 's/old3/new3/g' SourceFile >Result
[ -s Result ] && mv Result SourceFile || exit