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Annotation of researchv10dc/man/man8/asd.8, revision 1.1

1.1     ! root        1: .TH ASD 8
        !             2: .CT 1 sa_auto
        !             3: .SH NAME
        !             4: asd \- automatic software distribution
        !             5: .SH SYNOPSIS
        !             6: .B /usr/lib/asd/cdaemon
        !             7: .br
        !             8: .B /usr/lib/asd/dkinstall
        !             9: .br
        !            10: .B /usr/lib/asd/mkspool
        !            11: .br
        !            12: .B /usr/lib/asd/rmlocks
        !            13: .br
        !            14: .B /usr/lib/asd/udaemon
        !            15: .SH DESCRIPTION
        !            16: These programs constitute the innards of the
        !            17: automatic software distribution system
        !            18: invoked by
        !            19: .IR ship (8).
        !            20: .PP
        !            21: .I Mkspool
        !            22: creates an
        !            23: .SM ASD
        !            24: spool directory for its invoker (if necessary),
        !            25: puts a file named
        !            26: .F dummy
        !            27: in the directory to prevent
        !            28: .I cdaemon
        !            29: from deleting it,
        !            30: and prints the directory's name.
        !            31: .PP
        !            32: .I Udaemon
        !            33: examines its invoker's
        !            34: .SM ASD
        !            35: spool directory in lexical order
        !            36: for things to do.
        !            37: To forestall multiple daemons, it first makes an empty file named
        !            38: .BI L. pid
        !            39: in the spool directory
        !            40: and tries to link to it a file
        !            41: .FR lock .
        !            42: If the link fails,
        !            43: .BI L. pid
        !            44: is removed and
        !            45: .I udaemon
        !            46: exits.
        !            47: .PP
        !            48: Shipping instructions
        !            49: appear in pairs of files with
        !            50: .B .s
        !            51: and
        !            52: .B .d
        !            53: suffixes.
        !            54: .I Udaemon
        !            55: examines each status
        !            56: .RB ( .s )
        !            57: file for destination names and
        !            58: places a network call
        !            59: to send the corresponding data
        !            60: .RB ( .d )
        !            61: file to
        !            62: .I dkinstall
        !            63: at each destination.
        !            64: .I Dkinstall
        !            65: verifies the data
        !            66: and gives it to
        !            67: .IR inspkg ,
        !            68: see
        !            69: .IR mkpkg (8).
        !            70: .PP
        !            71: A status file contains
        !            72: zero or more entries,
        !            73: each of which has one or more lines.
        !            74: The first line of an entry is a
        !            75: network address,
        !            76: with default network
        !            77: .B dk
        !            78: and default service
        !            79: .BR asd ,
        !            80: possibly followed by a blank and a failure report.
        !            81: An entry with destination
        !            82: .L #
        !            83: is a comment and is ignored.
        !            84: Lines after the first begin with
        !            85: a tab,
        !            86: and contain output generated by the entry.
        !            87: If an entry has output,
        !            88: it is considered complete
        !            89: and will be processed no further.
        !            90: .PP
        !            91: .I Udaemon
        !            92: scans each status file once,
        !            93: and attempts to send the corresponding data file to the destination
        !            94: for each incomplete entry.
        !            95: If the attempt fails,
        !            96: a failure report is appended to the entry,
        !            97: and it remains incomplete.
        !            98: If the attempt succeeds,
        !            99: or the failure is severe,
        !           100: an error message
        !           101: or output from
        !           102: .I dkinstall
        !           103: is appended to the entry,
        !           104: which makes the entry complete.
        !           105: If an entry is completed successfully
        !           106: but there are no output lines,
        !           107: the entry is deleted.
        !           108: .PP
        !           109: Each instance of
        !           110: .I udaemon
        !           111: remembers which network addresses failed with non-severe errors;
        !           112: entries with the same address in later status files
        !           113: are given failure status `deferred for sequence.'
        !           114: .PP
        !           115: If at least one additional entry was completed,
        !           116: .I udaemon
        !           117: sends the new status file to the owner by
        !           118: .IR mail (1)
        !           119: after the whole file has been scanned.
        !           120: If no incomplete entries remain,
        !           121: both status and data files are removed.
        !           122: .PP
        !           123: .I Cdaemon
        !           124: examines every subdirectory of
        !           125: .FR /usr/spool/asd ,
        !           126: deletes empty directories and, impersonating the owner,
        !           127: invokes
        !           128: .I udaemon
        !           129: for nonempty directories.
        !           130: .I Cdaemon
        !           131: should be run regularly by
        !           132: .IR cron (8)
        !           133: with super-user permissions.
        !           134: .PP
        !           135: .IR Rmlocks
        !           136: removes all lock files in
        !           137: subdirectories of
        !           138: .FR /usr/spool/asd .
        !           139: It should be called from
        !           140: .IR rc (8).
        !           141: .PP
        !           142: Entries in an
        !           143: .SM ASD
        !           144: spool directory may be made without regard to locks
        !           145: provided that everything is done in the right
        !           146: sequence:
        !           147: (1) call
        !           148: .IR mkspool ;
        !           149: (2) create the data file;
        !           150: (3) create the status file under a temporary name;
        !           151: (4) rename the status file to end with
        !           152: .BR .s ;
        !           153: (5) remove the
        !           154: .F dummy
        !           155: file, if present; and
        !           156: (6) call
        !           157: .IR udaemon .
        !           158: .PP
        !           159: Because
        !           160: .I mail
        !           161: will not send an empty file,
        !           162: a status file must have a comment entry if
        !           163: acknowledgment is desired after a
        !           164: successful
        !           165: .I udaemon
        !           166: run.
        !           167: .SH FILES
        !           168: .BI /usr/spool/asd/ "userid   "
        !           169: user's
        !           170: .SM ASD
        !           171: spool directory
        !           172: .SH SEE ALSO
        !           173: .IR mkpkg (8), 
        !           174: .IR ship (8)

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