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21:47
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A: Filtering find results by length

Stéphane ChazelasWith the zsh shell, globs can be filtered by file type (here directory) using glob qualifiers, and with the extendedglob option on, you get a (#cX,Y) glob operator similar to ERE {X,Y}, so you could do: set -o extendedglob print -rC1 -- ?(#c5,)(ND/) To print raw on 1 Column the files of type dir...

Jim L.
Jim L.
Thank you for providing an example of the bug in GNU find. FWIW, BSD find appears to handle that particular case correctly (CHARSET=UTF-8), matching on -name ????????* but not -name ?????????* and likewise, matching on -not -name '?????????*' but not on -not -name '????????*'.
Stéphane Chazelas
Stéphane Chazelas
@JimL, I suspect your BSD find doesn't support multi-byte characters and would find a UTF-8 encoded ééé as it has 6 bytes and 3 characters. You may want to clarify which BSD you're using. There's usually significant differences between each.
Jim L.
Jim L.
I'm happy to test, if you can create an example of how to create such.
Stéphane Chazelas
Stéphane Chazelas
@JimL, check with locale charmap that you're in a UTF-8 locale, touch ééé, and check which of find ééé -name '???' or find ééé -name '??????' returns it.
Jim L.
Jim L.
As above, charmap is UTF-8. find ééé -name '???' matches it, find ééé -name '??????' does not. But is it a multi-byte character? Hex E9 is still a single byte.
Stéphane Chazelas
Stéphane Chazelas
21:47
If touch ééé does touch $'\xe9\xe9\xe9', your terminal is not UTF-8 (0xe9 is the ISO8859-1 encoding of é while its UTF-8 encoding is 0xc3 0xa9). Try touch $'\ue9\ue9\ue9' instead in zsh and verify with ls | od -tx1 that you get 0c3 0xa9 bytes for each é.
Jim L.
Jim L. 
jimsdesk% echo $ZSH_VERSION
5.8.1
jimsdesk% locale charmap
UTF-8
jimsdesk% touch $'\ue9\ue9\ue9'
jimsdesk% ls -l
total 1
-rw-------  1 jim  wheel  0 May 17 14:49 ééé
jimsdesk% find . -name '??????'
jimsdesk% find . -name '????'
jimsdesk% find . -name '???'
./ééé
Stéphane Chazelas
Stéphane Chazelas
Looks good. Which BSD is it?
What about $'\ue9\ue9\ue9\xe9'?
That one's matched by zsh's ???? but bash's ???????
Jim L.
Jim L.
22:12
FreeBSD 13.1. Yes, that case is not as pretty: 
jimsdesk : 15:10:14 /home/jim/test/20220517/new> touch $'\ue9\ue9\ue9\xe9'
jimsdesk : 15:10:50 /home/jim/test/20220517/new> ls
ééé             ééé?
jimsdesk : 15:10:51 /home/jim/test/20220517/new> zsh
jimsdesk% ls -l
total 1
-rw-------  1 jim  wheel  0 May 17 14:49 ééé
-rw-------  1 jim  wheel  0 May 17 15:10 ééé?
jimsdesk% ls ???
ééé
jimsdesk% ls ????
ééé?
jimsdesk%
jimsdesk : 15:11:13 /home/jim/test/20220517/new> ls ???
ééé
jimsdesk : 15:11:16 /home/jim/test/20220517/new> ls ????
ls: ????: No such file or directory
find still gets it right, though: 
jimsdesk : 15:11:34 /home/jim/test/20220517/new> ls
ééé             ééé?
jimsdesk : 15:13:55 /home/jim/test/20220517/new> find . -name '???'
./ééé
jimsdesk : 15:14:04 /home/jim/test/20220517/new> find . -name '????'
./ééé�

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