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Annotation of researchv10dc/dist/man/v4/man7/dpd.7, revision 1.1.1.1

1.1       root        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)

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