[BASH] Using a function to write data to a file Post: 302411153

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Top Forums Shell Programming and Scripting [BASH] Using a function to write data to a file Post 302411153 by curleb on Wednesday 7th of April 2010 08:54:36 PM

04-07-2010

Registered User

if I might add, both methyl and jlliagre are right-ish on the matter of the syntax...but kshji is most right in suggesting a bum char is gumming up the works...

The "<<- _EOF_" is very much usable (as well as not necessary...), so long as the shell supports it and the whitespace is in fact a space (hex:20). A tab char will not do, and actually causes the function to hang altogether, so an od -c would be most helpful in sorting out the root cause of the failure. Otherwise, manually re-create what you want to happen and then copy/paste it from whatever history file you're logging to...

My .02...

---------- Post updated at 20:39 ---------- Previous update was at 20:38 ----------

actually, it was jlliagre who'd suggested the octal dump...my bad!

---------- Post updated at 20:54 ---------- Previous update was at 20:39 ----------

can't leave well-enough alone...

Code:

$ tail -16 file_test.txt

cat <<- _EOF_
blah...[space]
_EOF_

cat <<- _EOF_
blah...[tab]-less
_EOF_

cat <<- _EOF_
blah...[tab]-more
        _EOF_

cat <<- _EOF_
blah...[space]-tab
        _EOF_

$ tail -16 file_test.txt |od -c
0000000  \r  \n   c   a   t       <   <   -       _   E   O   F   _  \r
0000020  \n   b   l   a   h   .   .   .   [   s   p   a   c   e   ]  \r
0000040  \n   _   E   O   F   _  \r  \n  \r  \n   c   a   t       <   <
0000060   -  \t   _   E   O   F   _  \r  \n   b   l   a   h   .   .   .
0000100   [   t   a   b   ]   -   l   e   s   s  \r  \n   _   E   O   F
0000120   _  \r  \n  \r  \n   c   a   t       <   <   -  \t   _   E   O
0000140   F   _  \r  \n   b   l   a   h   .   .   .   [   t   a   b   ]
0000160   -   m   o   r   e  \r  \n  \t   _   E   O   F   _  \r  \n  \r
0000200  \n   c   a   t       <   <   -       _   E   O   F   _  \r  \n
0000220   b   l   a   h   .   .   .   [   s   p   a   c   e   ]   -   t
0000240   a   b  \r  \n  \t   _   E   O   F   _  \r  \n
0000254

curleb

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