Solved

A sed file

Posted on 2011-03-24
2
437 Views
Last Modified: 2012-05-11
Hi, I have an self-training practice Trainingon bash command which needs help from you. Thank you in advance.
A long listing of the root directory, /, is used for input. Create a file holding sed commands that check for symbolic links and plain files. If a file is a symbolic link, precede it with a line "--This is a symlink--". If the file is a plain file, add a string on the same line, adding a comment like "<--this is a plain file".

Open in new window

0
Comment
Question by:zhshqzyc
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
2 Comments
 
LVL 8

Accepted Solution

by:
point_pleasant earned 250 total points
ID: 35207052

not a inline sed but gets the job done

ls -l / > /tmp/tmp_ls
while read inputline
do
        perms="$(echo $inputline | awk '{print $1}')"
        fn="$(echo $inputline | awk '{print $9}')"
        link_or_reg=`echo $perms | cut -c1`
        if [ "$link_or_reg" == "l" ]
        then
                echo "--This is a symlink-- \n$inputline"
        else
                echo "$inputline <--this is a plain file"
        fi

done < /tmp/tmp_ls
rm /tmp/tmp_ls
exit 0
0
 
LVL 23

Expert Comment

by:Maciej S
ID: 35207221
Works with GNU sed only (should be available in all linux distros).
Need some changes in other sed versions (in solaris for example).
ls -l / | sed '/^-/s/$/ <-- this is a plain file/;/^l/i\--This is a symlink--'

Open in new window

0

Featured Post

Free Tool: Port Scanner

Check which ports are open to the outside world. Helps make sure that your firewall rules are working as intended.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This Windows batch file is useful for organizing image files from a digital camera or other source, but can have many other uses.  It simply renames the file(s) to match their create date.  For example, if you took a picture today at 1:40pm and the …
How to remove superseded packages in windows w60 or w61 installation media (.wim) or online system to prevent unnecessary space. w60 means Windows Vista or Windows Server 2008. w61 means Windows 7 or Windows Server 2008 R2. There are various …
Learn several ways to interact with files and get file information from the bash shell. ls lists the contents of a directory: Using the -a flag displays hidden files: Using the -l flag formats the output in a long list: The file command gives us mor…
In a recent question (https://www.experts-exchange.com/questions/29004105/Run-AutoHotkey-script-directly-from-Notepad.html) here at Experts Exchange, a member asked how to run an AutoHotkey script (.AHK) directly from Notepad++ (aka NPP). This video…

690 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question