[SOLVED] bash: echo $variable without carriage return

Smokey_justme · 01-12-2014, 06:11 AM

Hmm.. Then are you sure you don't have something in your ~/.bashrc or similar startup script?

Try creating a fresh user (or, hell, try while beeing root -- just be sure it's a login shell, so do "su - root", or "sudo bash --login") and see if the JAVA_HOME variable still has problems.. The point is to pin-point if it's a system-wide script problem or just some script that gets executed when you login..

jlinkels · 01-12-2014, 06:22 AM

Quote:

Originally Posted by Smokey_justme

@jlinkels: Echo will add an <LF> character by default at the end (without the -n option) .. It has nothing to do with the problem at hand and it doesn't really matter in rknichols code (which was focused on the inner echo fixing the <CR> in the variable).. Moreover, -n option will not suppress any <LF>'s added by you, it will only not add a new one..

I think I had a serious off-day. Too bad some replies quoted me, so it doesn't even make sense to delete my posts.

jlinkels

Smokey_justme · 01-12-2014, 06:32 AM

Pff, if I had a nickle for each time I made this kind of mistakes... Just don't worry about it...

eRJe · 01-12-2014, 09:03 AM

@jlinkels; I'm just glad that people take the effort to help :-)

I still haven't found where $JAVA_HOME is getting the return carriage but I have double proof, I think...

Code:

root@RJ-Server:/etc# echo $JAVA_HOME
/usr/lib64/java
root@RJ-Server:/etc# echo $MAIL
/var/mail/root
root@RJ-Server:/etc# echo $MAIL blaaaaat
/var/mail/root blaaaaat
root@RJ-Server:/etc# echo $JAVA_HOME blaaaat
 blaaaat64/java

root@RJ-Server:~# ln -s $JAVA_HOME java
root@RJ-Server:~# ln -s $MAIL mail

ls -al

lrwxrwxrwx  1 root root       16 Jan 12 16:00 java -> /usr/lib64/java\r
lrwxrwxrwx  1 root root       14 Jan 12 16:00 mail -> /var/mail/root
$

the \r is causing my pain, right? I really don't understand how it is added...

rknichols · 01-12-2014, 11:07 AM

vi (and its clones) will detect that the file has DOS-style CR-LF line endings and will work in that mode, saving the file in that same format. If you look at the status line at the bottom of the screen when the file is first read, you will see "[dos]". To save such a file with Unix-style line endings, you would need to change the fileformat before saving it:

Code:

:set ff=unix

Or, you could just run the dos2unix command on the file to change its line endings.

Smokey_justme · 01-12-2014, 11:10 AM

The presence of the <CR>(\r) is clear..

Just to be sure, run the following (notice the first dot and space after? that's mandatory):

Code:

. /etc/profile.d/jdk.sh
echo $JAVA_HOME blabla

If the carriage return is still present then this is your affected file, so run the following (as root) to fix it:

Code:

cd /etc/profile.d
mv jdk.sh jdk.sh.orig
tr -d '\r' < jdk.sh.orig > jdk.sh
chmod a+x jdk.sh
chmod a-x jdk.sh.orig

Then rerun the first code-block from this post and insure it's fixed.

LE: Or do what rknichols said.. But Slackware doesn't have dos2unix command (use my code instead if you don't know how to use vi)

SAbhi · 01-12-2014, 08:06 PM

well you cant remove the <CR> at the source but yes as the way suggested using "tr -d".

eRJe · 01-13-2014, 04:19 PM

Problem is solved! Thanks everyone for helping.

I used @rknichols trick to set vim with the right properties and then saved the file.

@Smokey_justme thanks for your suggestion and the little coding. That got me a little step further in understanding things.

Thanks!
Robbert

ps I still don't understand how that file got the carriage. I'm very sure I did not have that on a Windows computer. I think the file in the java package must have already contained the error.