Solved

Linux Shell Scripting: Semicolon and everything after it

Posted on 2013-11-11
4
333 Views
Last Modified: 2013-11-11
Using Linux shell scripting, how can I get the semicolon and everything after it?

For example:
xyz="Hello world; this is a test"
echo ${xyz##*;}

Open in new window

Should return:
; this is a test

And this should return nothing:
xyz="Hello world"
echo ${xyz##*;}

Open in new window

0
Comment
Question by:hankknight
  • 2
4 Comments
 
LVL 40

Expert Comment

by:omarfarid
ID: 39639585
put single quote around the text e.g.

echo 'hi ; # {my name}'

you could escape special chars with \ e.g.

echo my name \; is tata
0
 
LVL 68

Expert Comment

by:woolmilkporc
ID: 39639588
I don't believe this can be done with variable editing.
How about good old "awk"?

xyz="Hello world"
echo $xyz |awk 'BEGIN {FS=";"} {if ($0~FS) S=FS; print S $2}'
# or shorter:
echo $xyz |awk -v FS=";" '{if ($0~FS) S=FS; print S $2}'
xyz="Hello world; this is a test"
echo $xyz |awk 'BEGIN {FS=";"} {if ($0~FS) S=FS; print S $2}'
# or shorter:
echo $xyz |awk -v FS=";" '{if ($0~FS) S=FS; print S $2}'
0
 
LVL 16

Author Comment

by:hankknight
ID: 39639679
woolmilkporc, your code does what I need, but how can it be integrated with this loop?
for f in *
do
x=`file -ib $f`
if test ${f##*.} = "css"; then
         m="text/css"
elif test ${f##*.} = "js"; then
         m="application/javascript"
elif test ${f##*.} = "htm"; then
         m="text/html"
elif test ${f##*.} = "html"; then
         m="text/html"
elif test ${f##*.} = "json"; then
         m="application/json"
elif test ${f##*.} = "jsonp"; then
         m="application/javascript"
elif test ${f##*.} = "xml"; then
         m="application/xml"
else 
  m=$x
fi
echo $m
done

Open in new window

In this example, the mime type determined by "x=`file -ib $f`" is:
text/x-c++; charset=us-ascii
My code posted above changes it to:
text/css
but I want it changed to
text/css; charset=us-ascii

How can I use "awk" with this code instead of echo?
0
 
LVL 68

Accepted Solution

by:
woolmilkporc earned 500 total points
ID: 39639735
# for f in *
for f in abc.css def.js ghi.htm jkl.html mno.json pqr.jsonp stu.xml vwx.other
do
# x=`file -ib $f`
x="text/x-c++; charset=us-ascii"
y=$(echo $x |awk -v FS=";" '{if ($0~FS) S=FS; print S $2}')
if test ${f##*.} = "css"; then
         m="text/css"
elif test ${f##*.} = "js"; then
         m="application/javascript"
elif test ${f##*.} = "htm"; then
         m="text/html"
elif test ${f##*.} = "html"; then
         m="text/html"
elif test ${f##*.} = "json"; then
         m="application/json"
elif test ${f##*.} = "jsonp"; then
         m="application/javascript"
elif test ${f##*.} = "xml"; then
         m="application/xml"
else
  m=$x
  y=""
fi
echo $m$y
done

Please note that I commented out your "for .." and "x=.." lines and replaced them with direct assignments for testing!
0

Featured Post

Ransomware: The New Cyber Threat & How to Stop It

This infographic explains ransomware, type of malware that blocks access to your files or your systems and holds them hostage until a ransom is paid. It also examines the different types of ransomware and explains what you can do to thwart this sinister online threat.  

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
how to install java on RHEL image on EC2 4 42
awk file 6 79
CentOS 7 Linux for HP DL380 G4 32Bits 7 50
When trying to install php-fpm on CentOS 7 - GPG error 2 50
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 …
I. Introduction There's an interesting discussion going on now in an Experts Exchange Group — Attachments with no extension (http://www.experts-exchange.com/discussions/210281/Attachments-with-no-extension.html). This reminded me of questions tha…
Learn how to navigate the file tree with the shell. Use pwd to print the current working directory: Use ls to list a directory's contents: Use cd to change to a new directory: Use wildcards instead of typing out long directory names: Use ../ to move…
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…

808 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