On 6/23/22 9:39 AM, Steffen Nurpmeso wrote:
Hello.
I stumbled over a bug in the MUA i maintain, and when checking
against what shells do with lonely unary ! i then came to this:
#?0|kent:tmp$ dash -c 'if [ ! ! hey ]; then echo du; fi'
du
#?0|kent:tmp$ bash -c 'if [ ! ! hey ]; then echo du; fi'
bash: line 1: [: too many arguments
#?0|kent:tmp$ busybox.static sh -c 'if [ ! ! hey ]; then echo du; fi'
du
Thanks for the report. This appears to have existed for over thirty years,
and you're the first one to report it.
Chet
--
``The lyf so short, the craft so long to lerne.'' - Chaucer
``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU c...@case.edu http://tiswww.cwru.edu/~chet/
