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2 (two) here documents in a row


 
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# 1  
Old 10-29-2010
2 (two) here documents in a row

Ok, it may sound a bit stupid but I can't find the answer.. How do one put 2 here documents in a row? for instance, i want to do something like:

Code:
diff <<eof <<eof2 # doesn't work...
> a
> b
> eof
> a
> c
> eof2

its mostly to satisfy my curiosity!!
thanks,
Anthony
# 2  
Old 10-29-2010
This should work with ksh (ksh93 at least)
Code:
diff <(cat <<eof
a
b
eof) <(cat <<eof
a
c
eof)

# 3  
Old 10-29-2010
If you haven't got the above Shell, then you need to use workfiles.
For example:
Code:
file1=/tmp/file1.$$
file2=/tmp/file2.$$
#
cat <<eof >${file1}
a
b
eof
#
cat <<eof >${file2}
a
c
eof
#
diff ${file1} ${file2}
#
rm ${file1}
rm ${file2}

# 4  
Old 10-29-2010
I just noticed my code works with bash too but need a small modification to work there (eof and closing parenthesis on a different line):

Code:
diff <(cat <<eof
a
b
eof
) <(cat <<eof
a
c
eof
)

This User Gave Thanks to jlliagre For This Post:
# 5  
Old 10-29-2010
I see, I use bash too. that might come handy one day!
Thanks guys Smilie
 

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