If an ordinary user tries to write to lp0, this is the result: $ cat > /dev/lp0 bash: /dev/lp0: Permission denied
Using a large club results in this: $ su root -c "cat > /dev/lp0" Password: more stuff $ ls -l /dev/lp* -rw-r--r-- 1 root root 11 Mar 11 11:49 /dev/lp0 $ cat /dev/lp0 more stuff i.e. /dev/lp0 has been overwritten. I'd suggest; 1. Get CUPS to a point where "lpr -p some.txt" prints a date-stamped some.txt (see man CUPS and man lpr). 2. Get your program printing to STDOUT 3. Pipe to lpr Handling print queues is the OS' job, not the application's. On 3/10/19, ToddAndMargo via perl6-users <perl6-users@perl.org> wrote: > >> Hi All, > >> > >> How do I output data to a printer on /dev/lp0 (LPT1)? > >> > >> Many thanks, > >> -T > >> > > On 3/10/19 11:28 AM, Parrot Raiser wrote: >> Do you have the printer set up in CUPS? (Common Unix Printing System.) >> See "man cups". >> >> Applications shouldn't normally be writing to explicit device IDs. >> >> On 3/10/19, ToddAndMargo via perl6-users <perl6-users@perl.org> wrote: > > Hi Parrot, > > I mean writing directly to /dev/lp0. > > This is my example that does not work as I have a kernel problem > with lp0 at the moment: > > p6 '"/dev/lp0".IO.spurt( "abc"~chr(12) );' > > But it would also be nice to know how to write to cups as well > for my notes. > > -T >
