While there might be a chgrp
command in your OS,
Perl does not have a chgrp()
function. Perl only
has a chown()
function, which is used to set
both the user and the group id of a file. This is because many
Perl functions mimic the C library, and not the programs from
Also, there are 12 protection bits, not 9. You are forgetting
the "set user id", "set group id" and the "sticky bit".
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