Follow-up Comment #8, bug #14619 (project findutils):
Might I suggest the following documentation approach for the man and info
pages:
-perm mode: exact match of set and unset bits in symbolic or numeric mode;
includes symbolic modes with leading '+' but not with leading '-'
-perm -mode: match all set bits (and ignore other bits) in symbolic or
numeric mode
-perm /mode: match any set bits (and ignore other bits) in symbolic or
numeric mode
-perm +mode: match any set bits (and ignore other bits) in numeric mode (use
/mode for symbolic)
Then include an example showing how to find a file that has all three read
bits, at least one write bit, and no execute bits, in both numeric and
symbolic representation:
find . -perm -444 -perm +222 \! -perm /111
find . -perm -a+r -perm /a+w \! -perm /a+x
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