Re: [Help-bash] How to safely work on files/dirs with .

[Eric Blake]

On 03/19/2016 11:31 AM, Bob Proulx wrote:
> Stephane Chazelas wrote:
>> chmod [...] +r [...]
> 
> I saw this and wanted to comment.  I tend to avoid bare permissions.
> Those that start with a + or - but don't specify one of the explicit
> [ugoa] letters.  Because then it depends upon the setting of umask.

What's more, the +r form is unambiguous, but the -r form could be
ambiguous with using an option named '-r' rather than a mode setting
string (and in fact, GNU coreutils has different behavior for 'chmod -r
foo' than for 'chmod -- -r foo', precisely because POSIX gives it the
freedom to interpret -r as an option).

-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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