DPD (VII) 3/15/72 DPD (VII)
NAME dpd -- spawn data phone daemon
SYNOPSIS /etc/dpd
DESCRIPTION dpd is the 201 data phone daemon. It is designed
to submit jobs to the Honeywell 6070 computer via
the gerts interface.
dpd uses the directory /usr/dpd. The file lock
in that directory is used to prevent two daemons
from becoming active. After the daemon has suc-
cessfully set the lock, it forks and the main
path exits, thus spawning the daemon. /usr/dpd
is scanned for any file beginning with df. Each
such file is submitted as a job. Each line of a
job file must begin with a key character to spec-
ify what to do with the remainder of the line
S directs dpd to generate a unique snumb card.
This card is generated by incrementing the
first word of the file /usr/dpd/snumb and con-
verting that to decimal concatenated with the
station ID.
L specifies that the remainder of the line is
to be sent as a literal.
B specifies that the rest of the line is a
file name. That file is to be sent as binary
cards.
F is the same as B except a form feed is
prepended to the file.
U specifies that the rest of the line is a
file name. After the job has been transmit-
ted, the file is unlinked.
Any error encountered will cause the daemon to
drop the call, wait up to 20 minutes and start
over. This means that an improperly constructed
df file may cause the same job to be submitted
every 20 minutes.
While waiting, the daemon checks to see that the
lock file still exists. If the lock is gone, the
daemon will exit.
FILES /dev/dn0, /dev/dp0, /usr/dpd/*
SEE ALSO opr(I)
DIAGNOSTICS --
BUGS --