Re: default/simple globbing

[lacsaP Patatetom]

Le mer. 27 nov. 2024 à 14:01, #!microsuxx <fxmbsw7@gmail.com> a écrit :

> .. not spaces safe , but dev sys name usually doesnt have spaces
>
> On Wed, Nov 27, 2024, 1:58 PM #!microsuxx <fxmbsw7@gmail.com> wrote:
>
>> ls
>> 2-3  2-3.1  2-3:1.0  usb2
>> ~/tt $ a=( *-* ) a=( ${a[@]/*[:.]*} ) ; declare -p a
>> declare -a a=([0]="2-3")
>>
>> On Wed, Nov 27, 2024, 12:56 PM lacsaP Patatetom <patatetom@gmail.com>
>> wrote:
>>
>>> hi,
>>>
>>> I try to display only part of the `/sys/bus/usb/devices/` folder with `ls
>>> /sys/bus/usb/devices/*-*[!.:]*` or `ls /sys/bus/usb/devices/*-*[^.:]*`
>>> but
>>> it doesn't subtract entries with a dot or colon in their name (only usb
>>> entries are removed).
>>>
>>> if it's possible, what is the correct expression to use without having to
>>> activate extended globbing ?
>>>
>>> regards, lacsaP.
>>>
>>> $ ls /sys/bus/usb/devices/
>>> ...
>>> /sys/bus/usb/devices/2-3
>>> /sys/bus/usb/devices/2-3.1
>>> /sys/bus/usb/devices/2-3:1.0
>>> /sys/bus/usb/devices/usb2
>>> ...
>>>
>>> $ ls /sys/bus/usb/devices/*-*[!.:]*
>>> ...
>>> /sys/bus/usb/devices/2-3
>>> /sys/bus/usb/devices/2-3.1
>>> /sys/bus/usb/devices/2-3:1.0
>>> ...
>>>
>>
this isn't quite what I want : with `ls` I'd like to list only those
entries that match the regular expression
`^/sys/bus/usb/devices/[0-9]+-[0-9]+$', but the bash expression
`/sys/bus/usb/devices/*-*[!.:]*` used with `ls` doesn't return the desired
entries.
although the expression seems correct, it may not be possible with bash's
default globbing...

I use the `ls` command to address globbing, but in reality, the expression
should take place in a `for` loop to replace this one which works as
expected :

$ for usb in $(find /sys/bus/usb/devices/ | grep -E '/[0-9]+-[0-9]+$'); do
echo $usb; etc...; done
/sys/bus/usb/devices/2-3
/sys/bus/usb/devices/1-10
/sys/bus/usb/devices/4-1
/sys/bus/usb/devices/1-8
/sys/bus/usb/devices/1-2

when this one doesn't work :

for usb in /sys/bus/usb/devices/*-*[!.:]*; do echo $usb; done
/sys/bus/usb/devices/1-0:1.0
/sys/bus/usb/devices/1-10
/sys/bus/usb/devices/1-10:1.0
/sys/bus/usb/devices/1-10:1.1
...
/sys/bus/usb/devices/4-1.4
/sys/bus/usb/devices/4-1.4:1.0
/sys/bus/usb/devices/4-1:1.0

the goal is to use only `bash` and abandon `find` and `grep` (`find` can do
this on its own).