Just add the user "www-data" to the "dialout" group.
--- In Clark Dunson <> wrote:
>
> putting chmod into /etc/rc.local sometimes works.
>
> On May 17, 2011, at 3:46 PM, mrnelson wrote:
>
> > I'm playing with the TS-7553, using the full Lenny Linux. I have a
> > program which reads/writes from /dev/ttyUSB0. Works great as root,
> > but not when I try to make queries from apache, because the default
> > permissions of /dev/ttyUSB0 are
> >
> > crw-rw---- 1 root dialout 188, 0 May 17 22:01 /dev/ttyUSB0
> >
> > What's the best way to get access to this? I can chmod it to 666,
> > but as soon as I reboot it comes back as 660. Should I be trying to
> > figure out udev (this looks complicated to say the least) or
> > perhaps add nobody (what the php script likely runs under from
> > apache) as a member of the dialout group (that seems, er, dangerous).
> >
> > Is there another better way?
> >
> >
>
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