2024-10-11 13:45:38 -06:00
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.\" Copyright (c) 2024 Sasha Koshka <sashakoshka@tebibyte.media>
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.\"
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.\" This work is licensed under CC BY-SA 4.0. To see a copy of this license,
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.\" visit <http://creativecommons.org/licenses/by-sa/4.0/>.
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.\"
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.TH BULB 1 2024-10-11
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.SH NAME
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bulb \(en bulletin board
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.\"
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.SH SYNOPSIS
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bulb
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.RB [ -hlpu ]
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.RB [ -b\ board ]
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.RB [ -n\ number ]
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.\"
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.SH DESCRIPTION
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Read from and post to boards (text files) on the system. Posts are plain text,
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multiline, and each one is tagged with the user name of its author.
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.\"
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.SH OPTIONS
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.IP \fB-h\fP
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Prints the help text and exits.
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.IP \fB-b\fP\ \fIboard\fP
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Specifies a board other than \(lqgeneral\(rq.
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.IP \fB-l\fP
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Lists available boards and exits.
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.IP \fB-n\fP\ \fInumber\fP
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Takes a numeric argument as the amount of recent posts to print out, the default
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being 8.
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.IP \fB-p\fP
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Posts a message read from the standard input. See the STANDARD INPUT section.
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.IP \fB-u\fP
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Operates undercover. All posts made will be under the name \(lqanonymous\(rq.
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.\"
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2024-10-11 14:23:55 -06:00
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.SH ENVIRONMENT
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The BULBPATH environment variable specifies a colon-separated list of
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directories (much like PATH) in which to search for boards. Directories at the
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start take precedence over directories at the end. It has a value of
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.I /var/bulb
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by default.
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.SH FILES
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.I /var/bulb/*
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.\"
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2024-10-11 13:45:38 -06:00
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.SH STANDARD INPUT
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When the
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.B -p
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2024-10-11 14:23:55 -06:00
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option is supplied, the standard input will be read until EOF. The resulting
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text will be posted under the name of the current user in whichever board is
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selected.
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2024-10-11 13:45:38 -06:00
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.\"
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.SH STANDARD OUTPUT
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If the
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.B -l
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option is supplied, a list of available boards will be written to the standard
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output. If not, the last
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.B -n
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messages in the selected board will be written.
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.\"
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.SH DIAGNOSTICS
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In the event of an I/O error, a debug message will be printed and the program
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will exit with an error code. In the event of a bad invocation, a debug message
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will be printed alongside usage text and the program will exit with an error
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code.
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.\"
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.SH RATIONALE
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The commands
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.BR talk (1p),
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and
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.BR write (1p),
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and
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.BR wall (1p)
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can be used effectively for textual intra-system communication, but they require
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that the receiving user(s) be both logged in and monitoring their terminal for
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any messages to ever get through. The
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.BR bulb (1)
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command was written to support asynchronous, persistent conversations between
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users of the same system. It is also possible to create bulletins, MOTDs, etc.
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.\"
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.SH AUTHOR
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Written by Sasha Koshka
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.MT sashakoshka@tebibyte.media
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.ME .
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.\"
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.SH COPYRIGHT
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Copyright \(co 2024 Sasha Koshka (pseudonymous). License GPLv3+: GNU GPL version
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3 or later <https://gnu.org/licenses/gpl.html>
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\."
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.SH SEE ALSO
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.BR talk (1p),
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.BR write (1p),
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.BR wall (1p)
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