tests: posix: cat(1p): added POSIX-compliant cat

tests/posix/bin/cat

@@ -0,0 +1,22 @@
+#!/bin/sh
+# Copyright (c) 2024 Emma Tebibyte <emma@tebibyte.media>
+# SPDX-License-Identifier: FSFAP
+#
+# Copying and distribution of this file, with or without modification, are
+# permitted in any medium without royalty provided the copyright notice and this
+# notice are preserved.  This file is offered as-is, without any warranty.
+
+# Strictly POSIX-compliant cat(1) implementation. See cat(1p)
+
+for arg in "$@"; do
+	case "$arg" in
+		-u) args="$(printf '%s	%s\n' "$args" "$arg")" ;;
+		*) args="$(printf -- '%s	-i	%s\n' "$args" "$arg")" ;;
+	esac
+done
+
+# See IEEE Std 1003.1-2017 3.282
+# https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap03.html#tag_03_282
+IFS='	'
+
+mm $args

tests/posix/bin/false

@@ -7,7 +7,6 @@
 # permitted in any medium without royalty provided the copyright notice and this
 # notice are preserved.  This file is offered as-is, without any warranty.
 
-alias true="$BIN/true"
+# Strictly POSIX-compliant false(1) implementation. See false(1p)
 
-true
+false "$@"
-true -h

tests/posix/bin/true

@@ -7,7 +7,5 @@
 # permitted in any medium without royalty provided the copyright notice and this
 # notice are preserved.  This file is offered as-is, without any warranty.
 
-alias false="$BIN/false"
+# Strictly POSIX-compliant true(1) implementation. See true(1p)
-
+true "$@"
-! false
-! false -h

tests/test.sh

@@ -30,8 +30,9 @@ done
 
 printf "Starting POSIX compatibility testing.\n\n"
 
-for utility in tests/posix/*; do
+for test in tests/posix/*.sh; do
-	printf '%s: %s: Testing utility.\n' "$0" "$utility"
+	export PATH="build/bin:$PATH"
+	printf '%s: %s: Testing utility.\n' "$0" "$test"
 	"$utility"
 	printf '\n'
 done