Bob Proulx <b...@proulx.com> writes: > Peng Yu wrote: >> I looks a little wired why 'until' is the way it is now. >> ... >> until test-commands; do consequent-commands; done >> while ! test-commands; do consequent-commands; done > > In the original Bourne shell there is no '!' operator. The 'until' > was a way to negate the expression without using a '!' which didn't > exist in that shell. An 'if' could operate using the 'else' clause. > But there wasn't any other way to do it in a while loop.
You could always do while test-commands; test $? -ne 0; do ...; done Andreas. -- Andreas Schwab, sch...@linux-m68k.org GPG Key fingerprint = 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5 "And now for something completely different."
