harakit/docs/mm.1

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.\" Copyright (c) 2024 DTB <trinity@trinity.moe>
.\"
.\" This work is licensed under CC BY-SA 4.0. To see a copy of this license,
.\" visit <http://creativecommons.org/licenses/by-sa/4.0/>.
.\"
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.TH MM 1 2024-07-14 "Harakit X.X.X"
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.SH NAME
mm \(en middleman
.\"
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.SH SYNOPSIS
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mm
.RB [ -aetu ]
.RB [ -i\ input ]
.RB [ -o\ output ]
.\"
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.SH DESCRIPTION
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Catenate input files and write them to the start of each output file or stream.
.\"
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.SH OPTIONS
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.IP \fB-a\fP
Opens outputs for appending rather than updating.
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.IP \fB-e\fP
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Use the standard error as an output.
.IP \fB-t\fP
Causes outputs to be overwritten instead of being truncated.
.IP \fB-u\fP
Ensures neither input or output will be buffered.
.IP \fB-i\fP\ \fIinput\fP
Opens a path as an input. If one or more of the input files is \(lq-\(rq or if
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no inputs are specified, the standard input shall be used. If specified as the
last option and if there are trailing arguments to the program, they shall be
appended to the list of files to use as inputs.
.IP \fB-o\fP\ \fIoutput\fP
Opens a path as an output. If one or more of the output files is \(lq-\(rq or if
no outputs are specified and the
.B -e
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option is not specified, the standard output shall be used. If specified as the
last option and if there are trailing arguments to the program, they shall be
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appended to the list of files to use as outputs.
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.\"
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.SH DIAGNOSTICS
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If an output cannot be written to, an error occurs; however, exiting will be
deferred until writing to any other specified outputs completes.
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When an error is encountered, a diagnostic message is printed and the program
exits with the appropriate
.BR sysexits.h (3)
status.
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.\"
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.SH RATIONALE
The
.BR cat (1p)
and
.BR tee (1p)
programs specified in POSIX together provide similar functionality. The
separation of the two sets of functionality into separate APIs seemed
unncessary.
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.\"
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.SH COPYRIGHT
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Copyright \(co 2024 DTB. License AGPLv3+: GNU AGPL version 3 or later
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<https://gnu.org/licenses/agpl.html>.
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.\"
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.SH SEE ALSO
.BR cat (1p),
.BR dd (1),
.BR dj (1),
.BR tee (1p)