Retrieve directory path from full file path through sh


 
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# 1  
Old 09-21-2010
Retrieve directory path from full file path through sh

Hi,

I have a file abcd.txt which has contents in the form of full path file names i.e.
Code:
$home> vi abcd.txt
/a/b/c/r1.txt
/q/w/e/r2.txt
/z/x/c/r3.txt

Now I want to retrieve only the directory path name for each row
i.e
Code:
/a/b/c/
/q/w/e/

How to get the same through shell script?
I have done till now:
Code:
while read file
do
  cd  <here need the directory path for each row>
  .. do some common operation ...
done < abcd.txt

Note:
Previously Franklin suggested for getting only the file name to use:
Code:
"${file##*/}"

Please help!Smilie

Last edited by royzlife; 09-21-2010 at 06:58 AM.. Reason: info
# 2  
Old 09-21-2010
man dirname
This User Gave Thanks to achenle For This Post:
# 3  
Old 09-21-2010
achenle,
can you help -
i have done this:
Code:
while read file
do
  dir = `dirname $file`
  print $dir
done < latest.txt

but i am getting error!

---------- Post updated at 04:02 PM ---------- Previous update was at 03:54 PM ----------

well it got solved! Thanks!
# 4  
Old 09-21-2010
Code:
$ for F in /a/b/c/r1.txt /q/w/e/r2.txt /z/x/c/r3.txt; do echo ${F%/*}/; done
/a/b/c/
/q/w/e/
/z/x/c/

# 5  
Old 09-21-2010
Another way: Remove the base filename you found with ${file##*/}. This method does not delete the trailing soidus.

Code:
for file in "/a/b/c/r1.txt" "/q/w/e/r2.txt" "/z/x/c/r3.txt"
do
        echo "${file%%${file##*/}}"
done

/a/b/c/
/q/w/e/
/z/x/c/

# 6  
Old 09-21-2010
Code:
$ ruby -ne 'puts File.dirname($_)' file
/a/b/c
/q/w/e
/z/x/c

This User Gave Thanks to kurumi For This Post:
# 7  
Old 09-21-2010
Hi methyl,

Could you explain echo "${file%%${file##*/}}" command
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