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Removing md5sum lines stored in text file

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# 1  
Old 07-23-2014
Removing md5sum lines stored in text file
Hello.

I'm writing a script where every file you create will generate a md5sum and store it into a text file.

Say I create 2 files, it'll look like this in the text file:
Code:
d41d8cd98f00b204e9800998ecf8427e     /helloworld/saystheman
d41d8cd98f00b204e9800998ecf8427e     /helloworld/test


I want the md5sum to be cleared from the text file when I delete the file.
So if I delete 'test', the text file will just have:
Code:
d41d8cd98f00b204e9800998ecf8427e     /helloworld/saystheman

I was thinking of using sed to remove the line, but I'm clueless as to how I'm supposed to define the string (consisting of both the md5sum and filename).

Is there a better way to remove the line or a way around using sed?
Last edited by Don Cragun; 07-23-2014 at 05:45 AM.. Reason: Add CODE and ICODE tags.
# 2  
Old 07-23-2014
Code:
$ cat text.file
d41d8cd98f00b204e9800998ecf8427e /helloworld/saystheman
d41d8cd98f00b204e9800998ecf8427e /helloworld/test

$ rm /helloworld/test

$ grep -v "/helloworld/test" text.file >text1.file

$ mv text1.file text.file

$ cat text.file
d41d8cd98f00b204e9800998ecf8427e /helloworld/saystheman

If you want this to done automatically then insert above commands in "your own rm" file [ make sure your PATH goes first to YOUR rm instead of standard UNIX rm ]
This User Gave Thanks to prvnrk For This Post:
batarangs_
# 3  
Old 07-23-2014
Thanks for the quick response. It worked Smilie
# 4  
Old 07-23-2014
Quote:
Originally Posted by prvnrk
Code:
$ cat text.file
d41d8cd98f00b204e9800998ecf8427e /helloworld/saystheman
d41d8cd98f00b204e9800998ecf8427e /helloworld/test

$ rm /helloworld/test

$ grep -v "/helloworld/test" text.file >text1.file

$ mv text1.file text.file

$ cat text.file
d41d8cd98f00b204e9800998ecf8427e /helloworld/saystheman

If you want this to done automatically then insert above commands in "your own rm" file [ make sure your PATH goes first to YOUR rm instead of standard UNIX rm ]
The code needs to be MUCH more complex than this if you're going to create your own rm utility from end. If you create $HOME/bin/rm containing:
Code:
/bin/rm "$1" && grep -v "$1" /absolute/path/to/text.file >/absolute/path/to/text1.file &&
mv /absolute/path/to/text1.file /absolute/path/ttext.file

then the command sequence:
Code:
touch /tmp/world
cd /tmp
rm world

will remove every entry from your sample text.file.
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