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What is wrong with: echo $PATH | sed s/:/\\n/g

 
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# 1  
Old 07-16-2013
What is wrong with: echo $PATH | sed s/:/\\n/g
Hello all!


I am on Mac (10.8.4) and my shell tcsh (man says version: Astron 6.17.00). Just to precise my tcsh:

Code:
echo $LC_CTYPE
UTF-8

I want to replace all ':' with a new line, to get all paths on one line. I don't find a way to make my shell accept the "\n"

My start was:

Code:
echo $PATH | sed s/:/\n/g

And I tried every possible variation of \n: \\n - "\n" - "\\n" or with \r. The result is always the : colon disappears but the replace is sometimes nothing or a literal "n" ...

Sorry for this dumb question; but the forum is for Dummies, isn't it?


marek

ps: in bash I get the same results
# 2  
Old 07-16-2013
Put the sed-script in quotes. I do not have tcsh at hand but in bash:
Code:
$ echo "a:b:c" |sed s/:/\n/g
anbnc
$ echo "a:b:c" |sed 's/:/\n/g'
a
b
c

Last edited by cero; 07-16-2013 at 08:48 AM..
# 3  
Old 07-16-2013
Code:
echo $PATH | awk -F: '{for(i=1; i<=NF; i++) {print $(i) } }'

Try that. I don't have tcsh, but this works correctly in bash.
# 4  
Old 07-16-2013
try hitting actual enter in sed for new line.

Code:
 
sed 's/:/\
/g

Last edited by vidyadhar85; 07-16-2013 at 09:16 AM..
# 5  
Old 07-16-2013
Oh thank you all! This was really a quick help!

Not working:

Code:
echo $PATH | sed 's/:/\n/g'
echo $PATH | sed 's/:/"\n"/g'
echo $PATH | sed 's/:/\\n/g'
echo $PATH | sed 's/:/"\\n"/g'
echo $PATH | sed "s/:/\n/g"
echo $PATH | sed "s/:/\\n/g"

hmm something wrong with my shell ...

Code:
echo $PATH | awk -F: '{for(i=1; i<=NF; i++) {print $(i) } }'

This is working perfectly; only problem: I have no idea how awk is working :-)

And the trick with a line enter is not working either:

Code:
echo $PATH | sed 's/:/
Unmatched '.

Thank you all for your help!

marek
# 6  
Old 07-16-2013
Sorry missed a backslash Smilie

Code:
 
echo $PATH | sed 's/:/\
/g'

# 7  
Old 07-16-2013
Thank you vidyadhar85

This is working in my shell:

Code:
echo $PATH | sed 's/:/ /g'

This replaces all colons with a space. Now lets try with a tab:

Code:
echo $PATH | sed 's/:/\t/g'
echo $PATH | sed 's/:/\\t/g'
echo $PATH | sed "s/:/\\t/g"
echo $PATH | sed "s/:/\t/g"

That means my shell has problems to interpret well the '\'

No lets try your suggestion:

Code:
echo $PATH | sed "s/:/\
? /g"
sed: 1: "s/:/
/g": unescaped newline inside substitute pattern

same for 's ... '

Code:
echo $PATH | sed 's/:/\                                                                                 /g'
sed: 1: "s/:/
/g": unescaped newline inside substitute pattern

So I have to live with an incomplete shell or learn awkward awk Smilie
 
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