79 lines
2.2 KiB
Groff
79 lines
2.2 KiB
Groff
|
.\" Copyright (c) 2023 DTB <trinity@trinity.moe>
|
|||
|
|
.\" Copyright (c) 2023 Emma Tebibyte <emma@tebibyte.media>
|
|||
|
|
.\"
|
|||
|
|
.\" 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/>.
|
|||
|
|
|
|||
|
|
.TH intcmp 1
|
|||
|
|
|
|||
|
|
.SH NAME
|
|||
|
|
|
|||
|
|
intcmp \(en compare integers
|
|||
|
|
|
|||
|
|
.SH SYNOPSIS
|
|||
|
|
|
|||
|
|
intcmp
|
|||
|
|
.RB ( -eghl )
|
|||
|
|
.RB [ integer ]
|
|||
|
|
.RB [ integer... ]
|
|||
|
|
|
|||
|
|
.SH DESCRIPTION
|
|||
|
|
|
|||
|
|
Intcmp compares integers.
|
|||
|
|
|
|||
|
|
.SH USAGE
|
|||
|
|
|
|||
|
|
The -e option permits given integers to be equal to each other. If combined
|
|||
|
|
with -g or -l, only adjacent integers in the argument sequence can be equal.
|
|||
|
|
.PP
|
|||
|
|
The -g option permits a given integer to be greater than the following integer.
|
|||
|
|
.PP
|
|||
|
|
The -l option permits a given integer to be less than the following integer.
|
|||
|
|
.PP
|
|||
|
|
It may help to think of the -e, -g, and -l options as equivalent to the
|
|||
|
|
infix algebraic “=”, “>”, and “<” operators respectively, with each option
|
|||
|
|
putting its symbol between every given integer. For example,
|
|||
|
|
.R intcmp -l 1 2 3
|
|||
|
|
is equivalent to evaluating "1 < 2 < 3".
|
|||
|
|
|
|||
|
|
.SH DIAGNOSTICS
|
|||
|
|
|
|||
|
|
Intcmp exits 0 for a valid expression and 1 for an invalid expression.
|
|||
|
|
.PP
|
|||
|
|
Intcmp prints a debug message and exits with the appropriate sysexits(3) error
|
|||
|
|
code in the event of an error.
|
|||
|
|
|
|||
|
|
.SH BUGS
|
|||
|
|
|
|||
|
|
There are multiple ways to express compound comparisons; “less than or equal
|
|||
|
|
to” can be -le or -el, for example.
|
|||
|
|
.PP
|
|||
|
|
The inequality comparison is -gl or -lg for “less than or greater than”; this
|
|||
|
|
is elegant but unintuitive.
|
|||
|
|
.PP
|
|||
|
|
-egl, "equal to or less than or greater than", exits 0 no matter what for valid
|
|||
|
|
program usage and may be abused to function as an integer validator.
|
|||
|
|
Use str(1) instead.
|
|||
|
|
|
|||
|
|
.SH RATIONALE
|
|||
|
|
|
|||
|
|
The traditional tool for integer comparisons in POSIX and other Unix shells has
|
|||
|
|
been test(1). This tool also handles string comparisons and file scrutiny.
|
|||
|
|
These parts of its functionality have been broken out into multiple utilities.
|
|||
|
|
|
|||
|
|
Strcmp’s functionality may be performed on a POSIX-compliant system with
|
|||
|
|
test(1p).
|
|||
|
|
|
|||
|
|
.SH AUTHOR
|
|||
|
|
|
|||
|
|
Written by DTB <trinity@trinity.moe>.
|
|||
|
|
|
|||
|
|
.SH COPYRIGHT
|
|||
|
|
|
|||
|
|
Copyright © 2023 DTB. License AGPLv3+: GNU AGPL version 3 or later
|
|||
|
|
<https://gnu.org/licenses/gpl.html>.
|
|||
|
|
|
|||
|
|
.SH SEE ALSO
|
|||
|
|
|
|||
|
|
strcmp(1), scrut(1), str(1), test(1)
|