.\" Copyright (c) 2023–2024 DTB <trinity@trinity.moe>
.\" Copyright (c) 2023–2024 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 STR 1

.SH NAME

str \(en test the character types of string arguments

.SH SYNOPSIS

str
.RB [ type ]
.RB [ string... ]

.SH DESCRIPTION

Test string arguments against each other.

The tests in this program are equivalent to the functions with the same names in
ctype.h(0p) and are the methods by which string arguments are tested.

.SH DIAGNOSTICS

If all tests pass, the program will exit with an exit code of 0. If any of the
tests fail, the program will exit unsuccessfully with an error code of 1.

An empty string will cause an unsuccessful exit as none of its contents pass any
tests.

When invoked incorrectly, a debug message will be printed and the program will
exit with the appropriate sysexits.h(3) error code.

.SH DEPRECATED FEATURES

Originally, there was an isvalue type as an extension to ctype.h(3), but it
was removed in favor of using strcmp(1) to compare strings against the empty
string ('').

.SH BUGS

There’s no way of knowing which argument failed the test without re-testing
arguments individually.

If a character in a string isn't valid ASCII str will exit unsuccessfully.

.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

ctype(3p), strcmp(1), ascii(7)