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Top Forums Shell Programming and Scripting Check for file permission
# 15  
Old 02-27-2014
Quote:
Originally Posted by alister
My point is simply that categorically advising against a for-loop is a bit much; given a modern shell and sufficient memory, the likelihood of a for-loop meltdown is nil.
Some of your explanations (especially the part about POSIX exempting shell lines) were new to me. In fact what i said was because of personal experience - the ksh (ksh88) in AIX, definitely in version 4-something (i can't exactly remember which, maybe 4.1.4 or 4.2.1) exhibited exactly this problem. I remember researching the problem back then and i developed the habit of using for-loops very cautiously, because i *saw* them breaking under certain circumstances while while-loops always worked. (Basically i use for-loops only to cycle through a fixed number of elements - a number i know at programming time. For everything else i use while-loops.)

I have to admit, though, that i didn't bother to find out if this is still relevant knowledge for the last 15-20 years, so perhaps you are right and my advice is not relevant any more.

I stand corrected, thanks for the information.

bakunin
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