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SubjectRe: [PATCH] checkpatch: fix false positive for REPEATED_WORD warning
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On Wed, 2020-10-21 at 12:26 -0700, Joe Perches wrote:

> Perhaps a regex for permissions is good enough
> $line !~ /\b[cbdl-][rwxs-]{9,9}\b/

Maybe not completely correct...

From info ls:

The file type is one of the following characters:

‘-’
regular file
‘b’
block special file
‘c’
character special file
‘C’
high performance (“contiguous data”) file
‘d’
directory
‘D’
door (Solaris 2.5 and up)
‘l’
symbolic link
‘M’
off-line (“migrated”) file (Cray DMF)
‘n’
network special file (HP-UX)
‘p’
FIFO (named pipe)
‘P’
port (Solaris 10 and up)
‘s’
socket
‘?’
some other file type

The file mode bits listed are similar to symbolic mode
specifications (*note Symbolic Modes::). But ‘ls’ combines
multiple bits into the third character of each set of permissions
as follows:

‘s’
If the set-user-ID or set-group-ID bit and the corresponding
executable bit are both set.

‘S’
If the set-user-ID or set-group-ID bit is set but the
corresponding executable bit is not set.

‘t’
If the restricted deletion flag or sticky bit, and the
other-executable bit, are both set. The restricted deletion
flag is another name for the sticky bit. *Note Mode
Structure::.

‘T’
If the restricted deletion flag or sticky bit is set but the
other-executable bit is not set.

‘x’
If the executable bit is set and none of the above apply.

‘-’
Otherwise.

So apparently to be correct this should be:

$line !~ /\b[bcCdDlMnpPs\?-][rwxsStT-]{9,9}\b/


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