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
Steffen Nurpmeso wrote in
<20220623133946.h72dj%stef...@sdaoden.eu>:
...
| #?0|kent:tmp$ bash -c 'if [ ! ! hey ]; then echo du; fi'
| bash: line 1: [: too many arguments
(5.1.16 that is on CRUX ports/core/bash/Pkgfile
./configure \
--prefix=/usr \
--e
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
Chet Ramey wrote in
<4169f2cd-d81c-29b7-918c-156b447c5...@case.edu>:
|On 6/23/22 9:39 AM, Steffen Nurpmeso wrote:
|> 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
On 6/23/22 5:08 PM, Steffen Nurpmeso wrote:
Chet Ramey wrote in
<4169f2cd-d81c-29b7-918c-156b447c5...@case.edu>:
|On 6/23/22 9:39 AM, Steffen Nurpmeso wrote:
|> 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
On 22/06/23 11:08 PM, Steffen Nurpmeso wrote:
> or even
> bash -c 'if [ ! ! hey = hey ]; then echo du; fi'
> bash -c 'if [ ! false = 1 ]; then echo du; fi'
`! ! hey = hey' is the same as `! ( ! ( hey = hey ) )', so
"not not true => true".
It probably works correctly because `! ! hey = hey' are
On Thu, Jun 23, 2022 at 05:58:23PM -0400, Chet Ramey wrote:
> On 6/23/22 5:08 PM, Steffen Nurpmeso wrote:
> >bash -c 'if [ ! ! hey = hey ]; then echo du; fi'
> Sure. This one isn't a common idiom for shell programmers, apparently.
I've seen it used in a math context, inside PS1. Like so:
co
