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Sed script help

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# 1  
Old 08-25-2010
Sed script help
Hi All,
I have a requirement where i have a test file which has a list of filenames, i have to read through the text file, and replace the filename with path and filename
Here is my code im using...
Code:
 
for line in `cat ~/manipulate.txt`
 do
 `sed 's/$line/cksum $line \/path\/to\/file\/name\/$line/'` >> manipula.txt
 done

The contents of manipulate.txt is like this :
Code:
abc.xsl
 def.xsl
 ghi.xsl
 jkl.xsl
 mno.xsl

It is not working.. please help me...
# 2  
Old 08-25-2010
Code:
$> cat infile
abc.xsl
def.xsl
ghi.xsl
jkl.xsl
mno.xsl
$> sed 's!.*!/path/to/file/name/&!' infile > manipula.txt
/path/to/file/name/abc.xsl
/path/to/file/name/def.xsl
/path/to/file/name/ghi.xsl
/path/to/file/name/jkl.xsl
/path/to/file/name/mno.xsl

# 3  
Old 08-25-2010
Thanks but n what i wanted
Hey Zaxxon,
Thanks a lot for your reply, but that s not what i wanted. i want the output to be like

Code:
 
cksum abc.xsl /path/to/file/name/abc.xsl


Im basically trying to find if the file has been changed, the solution that you gave does not fullfill my needs...
# 4  
Old 08-25-2010
Hi.

Use:
Code:
$ sed "s!.*!cksum & /path/to/file/&!" infile
cksum abc.xsl /path/to/file/abc.xsl
cksum def.xsl /path/to/file/def.xsl
cksum ghi.xsl /path/to/file/ghi.xsl
cksum jkl.xsl /path/to/file/jkl.xsl
cksum mno.xsl /path/to/file/mno.xsl

# 5  
Old 08-25-2010
Hey Scottn.....


Thanks a ton... im pretty new to sed scripting... would be a great help if you could explain the command to me..... the sed command that is being used here....Smilie



Thanks in advance....
# 6  
Old 08-25-2010
Hi.

Code:
s!.*!cksum & /path/to/file/&!

It substitutes the whole line with cksum followed by the original line, then the path, then the whole line again. & references the matched pattern space (.* - i.e. the whole line in this case). ! separates the regular expression (.* in this case) from the replacement (cksum & ...) and options to the s command. This can be almost any character, but by convention a slash / is used for this. As your replacement contains slashes it can get messy, so we chose something else.

sed, a stream editor
# 7  
Old 08-25-2010
Code:
# sed 's/\(.*\)/cksum \1 \/path\/to\/file\/name\/\1/' infile
cksum abc.xsl /path/to/file/name/abc.xsl
cksum def.xsl /path/to/file/name/def.xsl
cksum ghi.xsl /path/to/file/name/ghi.xsl
cksum jkl.xsl /path/to/file/name/jkl.xsl
cksum mno.xsl /path/to/file/name/mno.xsl

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