On Nov 26, 2012 2:48 PM, "Chet Ramey" <chet.ra...@case.edu> wrote: > > On 11/26/12 12:11 PM, Sam Liddicott wrote: > > > I explained how in the lines of my response that you deleted. > > > > It is potentially useless because: > > > > 1. it is non-obvious, most users will not expect this behaviour (unless > > already initiated into the secret) and so will not try to get that benefit. > > OK, so there's a need for documentation on how it differs from anonymous > or, in certain circumstances, explicitly numbered redirections. > > > 2. it is an unexpected side effect and will do something which is not > > expected, and be widely and "wrongly" labelled as buggy or unreliable by > > misunderstanding users and therefore damage the bash reputation. > > Hmmm...again, it's a new feature which shares some things with the old but > has its own behavior. Think of it as something closer to open/fcntl than > the historical redirections. The differences can be made more apparent > with better documentation. Certainly nobody has used it by accident > before. > > > 3. there already exists simple and explicit way to get the supposed benefit > > using the existing mechanism "exec" > > Not quite. You still have to pick the file descriptor you want to use with > `exec'. But you are not being forced to use it -- by all means, if you > think it's not what you need or want, feel free to avoid it and encourage > your friends to do the same. There have been unsuccessful new features -- > the case-modifying expansions are one example of a swing and miss. > > Chet >
Case modification in Bash is a highly viewed and highly upvoted question on Stack Overflow. http://stackoverflow.com/a/2265268/26428 > -- > ``The lyf so short, the craft so long to lerne.'' - Chaucer > ``Ars longa, vita brevis'' - Hippocrates > Chet Ramey, ITS, CWRU c...@case.edu http://cnswww.cns.cwru.edu/~chet/ >
