[unix-history] / man / man7 / dpd.7

.th DPD VII 3/15/72
.sh NAME
dpd \*- spawn data phone daemon
.sh SYNOPSIS
.bd /etc/dpd
.sh DESCRIPTION
.it Dpd
is the 201 data phone daemon.
It is designed to submit jobs to
the Honeywell 6070 computer via the GRTS
interface.
.s3
.it Dpd
uses the directory
.it /usr/dpd.
The file
.it lock
in that directory
is used
to prevent two daemons from becoming active.
After the daemon has successfully set the lock,
it forks and the main path exits, thus
spawning the daemon.
The directory is scanned for files
beginning with
.bd df.
Each such file is submitted as a job.
Each line of a job file must begin with a key
character to specify what to do with the remainder
of the line.
.s3
.lp +5 3
\fBS\fR	directs
.it dpd
to generate a unique snumb card.
This card is generated by incrementing the first
word of the
file
.it /usr/dpd/snumb
and converting that to three-digit octal concatenated with
the station ID.
.s3
.lp +5 3
\fBL\fR	specifies that the remainder of the line is to
be sent as a literal.
.s3
.lp +5 3
\fBB\fR	specifies that the rest of the line
is a file name.
That file is to
be sent as binary cards.
.s3
.lp +5 3
\fBF\fR	is the same as \fBB\fR except a form feed is prepended to the file.
.s3
.lp +5 3
\fBU\fR	specifies that the rest of the line
is a file name.
After the job has been transmitted,
the file is unlinked.
.s3
.i0
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
\fIdf\fR file may cause the same job to be submitted
every 20 minutes.
.s3
While waiting, the
daemon checks to
see that the
.it lock
file still exists.
If it is gone,
the
daemon will exit.
.sh FILES
/dev/dn0,
/dev/dp0,
/usr/dpd/*
.sh "SEE ALSO"
opr(I)
Commit	Line	Data
21153b00 KT	1	.th DPD VII 3/15/72
	2	.sh NAME
	3	dpd \*- spawn data phone daemon
	4	.sh SYNOPSIS
	5	.bd /etc/dpd
	6	.sh DESCRIPTION
	7	.it Dpd
	8	is the 201 data phone daemon.
	9	It is designed to submit jobs to
	10	the Honeywell 6070 computer via the GRTS
	11	interface.
	12	.s3
	13	.it Dpd
	14	uses the directory
	15	.it /usr/dpd.
	16	The file
	17	.it lock
	18	in that directory
	19	is used
	20	to prevent two daemons from becoming active.
	21	After the daemon has successfully set the lock,
	22	it forks and the main path exits, thus
	23	spawning the daemon.
	24	The directory is scanned for files
	25	beginning with
	26	.bd df.
	27	Each such file is submitted as a job.
	28	Each line of a job file must begin with a key
	29	character to specify what to do with the remainder
	30	of the line.
	31	.s3
	32	.lp +5 3
	33	\fBS\fR directs
	34	.it dpd
	35	to generate a unique snumb card.
	36	This card is generated by incrementing the first
	37	word of the
	38	file
	39	.it /usr/dpd/snumb
	40	and converting that to three-digit octal concatenated with
	41	the station ID.
	42	.s3
	43	.lp +5 3
	44	\fBL\fR specifies that the remainder of the line is to
	45	be sent as a literal.
	46	.s3
	47	.lp +5 3
	48	\fBB\fR specifies that the rest of the line
	49	is a file name.
	50	That file is to
	51	be sent as binary cards.
	52	.s3
	53	.lp +5 3
	54	\fBF\fR is the same as \fBB\fR except a form feed is prepended to the file.
	55	.s3
	56	.lp +5 3
	57	\fBU\fR specifies that the rest of the line
	58	is a file name.
	59	After the job has been transmitted,
	60	the file is unlinked.
	61	.s3
	62	.i0
	63	Any error encountered will cause the daemon to
	64	drop the call, wait up to 20 minutes and start over.
65	This means that an improperly constructed
66	\fIdf\fR file may cause the same job to be submitted
67	every 20 minutes.
68	.s3
69	While waiting, the
70	daemon checks to
71	see that the
72	.it lock
73	file still exists.
74	If it is gone,
75	the
76	daemon will exit.
77	.sh FILES
78	/dev/dn0,
79	/dev/dp0,
80	/usr/dpd/*
81	.sh "SEE ALSO"
82	opr(I)