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Full Discussion: POSIX compliance...
Operating Systems OS X (Apple) POSIX compliance... Post 302976956 by Scrutinizer on Saturday 9th of July 2016 02:58:53 AM
Old 07-09-2016
Quote:
Originally Posted by Don Cragun
[..]
Code:
n=0
while [ $((++n <= 100)) -eq 1 ]
do	echo "process n=$n"
done

Support for pre-/postfix operators like in ++n is not a requirement in the POSIX specification.
Quote:
The arithmetic expression shall be processed according to the rules given in Arithmetic Precision and Operations, with the following exceptions:

[..]
The sizeof() operator and the prefix and postfix "++" and "--" operators are not required.
Shell Command Language:Arithmetic Expansion


I suggest using something like this instead:
Code:
n=0
while [ $(( n+=1 )) -le 100 ]
do
  echo "process n=$n"
done


Last edited by Scrutinizer; 07-09-2016 at 11:58 AM..
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