104 lines
2.3 KiB
Groff
104 lines
2.3 KiB
Groff
.\" Copyright (c) 2023–2024 DTB <trinity@trinity.moe>
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.\" Copyright (c) 2023–2024 Emma Tebibyte <emma@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 INTCMP 1 2024-06-06 "Harakit X.X.X"
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.SH NAME
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intcmp \(en compare integers
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.\"
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.SH SYNOPSIS
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intcmp
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.RB [ -egl ]\ integer\ integer...
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.SH DESCRIPTION
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Compare integers to each other.
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.\"
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.SH OPTIONS
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.IP \fB-e\fP
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Permits given integers to be equal to each other.
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.IP \fB-g\fP
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Permits a given integer to be greater than the following integer.
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.IP \fB-l\fP
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Permits a given integer to be less than the following integer.
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.\"
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.SH EXAMPLES
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It may help to think of the
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.BR -e ,
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.BR -g ,
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and
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.B -l
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options as equivalent to the infix algebraic \(lq=\(rq, \(lq>\(rq, and \(lq<\(rq
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operators respectively, with each option putting its symbol between every given
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integer. The following example is equivalent to evaluating \(lq1 < 2 < 3\(rq:
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\"
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.RS
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intcmp -l 1 2 3
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.RE
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.\"
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.SH DIAGNOSTICS
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The program will exit with a successfully for a valid expression and with an
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error code of 1 for an invalid expression.
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In the event of an error, a debug message will be printed and the program will
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exit with the appropriate
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.BR sysexits.h (3)
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error code.
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.\"
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.SH BUGS
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.BR -egl ,
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\(lqequal to or less than or greater than\(rq, always exits successfully for
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valid program usage and may be abused to function as an integer validator. Use
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.BR str (1)
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instead.
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.\"
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.SH CAVEATS
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There are multiple ways to express compound comparisons; \(lqless than or equal
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to\(rq can be
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.B -le
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or
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.BR -el ,
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for example.
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The inequality comparison is
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.B -gl
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.B or
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.B -lg
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for \(lqless than or greater than\(rq;
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this is elegant but unintuitive.
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.\"
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.SH RATIONALE
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The traditional tool for integer comparisons in POSIX and other Unix shells has
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been
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.BR test (1).
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This tool also handles string comparisons and file scrutiny. These parts of its
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functionality have been broken out into multiple utilities.
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This program\(cqs functionality may be performed on a POSIX-compliant system
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with
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.BR test (1p).
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.\"
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.SH AUTHOR
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Written by DTB
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.MT trinity@trinity.moe
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.ME .
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.\"
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.SH COPYRIGHT
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.\"
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Copyright \(co 2023 DTB. License AGPLv3+: GNU AGPL version 3 or later
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<https://gnu.org/licenses/gpl.html>.
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.\"
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.SH SEE ALSO
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.BR scrut (1),
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.BR strcmp (1),
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.BR str (1),
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.BR test (1p)
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