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Printf transforms \x0a into \x00

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# 1  
Old 12-30-2012
Printf transforms \x0a into \x00
If

Code:
printf '\x0a' | xxd -cols 1

produces

Code:
0000000: 0a  .

then, why does

Code:
printf '%c' "`printf '\x0a'`" | xxd -cols 1

produce

Code:
0000000: 00  .

??
# 2  
Old 12-31-2012
Quote:
Originally Posted by vomv1988
If

Code:
printf '\x0a' | xxd -cols 1

produces

Code:
0000000: 0a  .

then, why does

Code:
printf '%c' "`printf '\x0a'`" | xxd -cols 1

produce

Code:
0000000: 00  .

??
Because command substitution (`command` or $(command)) removes trailing newlines from the output of the commands performed.
These 2 Users Gave Thanks to Don Cragun For This Post:
jim mcnamara vomv1988
# 3  
Old 12-31-2012
Quote:
Originally Posted by Don Cragun
Because command substitution (`command` or $(command)) removes trailing newlines from the output of the commands performed.
I didn't know that! Thanks for the info.
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