On 2023-04-12 21:07:59 -0400, Greg Wooledge wrote: > On Thu, Apr 13, 2023 at 12:12:23AM +0000, David wrote: > > $ echo [^0-9]* > > 11 22 <------ new behaviour by dash > > The [^chars] syntax is a negation in Basic and Extended Regular > Expressions, and in bash's globs (it's a bash extension), but NOT in > POSIX globs. > > The correct negation syntax in POSIX sh globs is [!chars].
It seems that [^chars] has undefined behavior (various POSIX shells behave differently: bash, ksh93 and yash regard ^ as a negation, but not mksh). In short, for portability, this form should not be used in shells. -- Vincent Lefèvre <vinc...@vinc17.net> - Web: <https://www.vinc17.net/> 100% accessible validated (X)HTML - Blog: <https://www.vinc17.net/blog/> Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)
