utils-std

commit: cb193c6e878d08097d6e503287071c2bd154b948
parent 5e49368e64f10e226c7f192d471bd14565f0f84b
Author: Haelwenn (lanodan) Monnier <contact@hacktivis.me>
Date:   Sun, 28 Dec 2025 03:21:49 +0100

cmd/printf: add ARG_MAX based tests

Diffstat:
M
test-cmd/printf.sh
31
++++++++++++++++++++++++++++++-

1 file changed, 30 insertions(+), 1 deletion(-)
diff --git a/test-cmd/printf.sh b/test-cmd/printf.sh
@@ -2,7 +2,7 @@
 # SPDX-FileCopyrightText: 2017 Haelwenn (lanodan) Monnier <contact+utils@hacktivis.me>
 # SPDX-License-Identifier: MPL-2.0
 
-plans=43
+plans=48
 WD="$(dirname "$0")/../"
 target="${WD}/cmd/printf"
 . "${WD}/test-cmd/tap.sh"
@@ -80,3 +80,32 @@ t_args extraconv_d '42;69;0;' '%d;%d;%d;' 42 69
 t_args fmt_star_width ' foo;bar;' '%*s;' 4 foo 2 bar
 t_args fmt_star_width_prec0 '    ;  ;' '%*.0s;' 4 foo 2 bar
 t_args fmt_star_prec 'foo;ba;' '%.*s;' 4 foo 2 bar
+
+wc_c() {
+	"$target" "$@" | wc -c | tr -cd '[:graph:]'
+}
+
+if arg_max=$(getconf ARG_MAX); then
+	# 64 should be enough but somehow ArchLinux and {Free,Net,Open}BSD need more
+	# 128 also wasn't enough for them
+	# 1024 is 1/4th of _POSIX_ARG_MAX so really ought to be enough leeway
+	arg_max=$((arg_max - 1024))
+
+	arg_max=$(( (arg_max/2)*2 ))
+	max_str=$("$target" '%*s' "$arg_max" '' | tr ' ' '=')
+	max_esc=$("$target" '%*s' "$arg_max" '' | tr ' ' '\\')
+
+	t_cmd arg_max_str "$arg_max" wc_c "$max_str"
+	t_cmd arg_max_str:%s "$arg_max" wc_c '%s' "$max_str"
+
+	t_cmd arg_max_esc "$((arg_max/2))" wc_c "$max_esc"
+	t_cmd arg_max_esc:%b "$((arg_max/2))" wc_c '%b' "$max_esc"
+	t_cmd arg_max_esc:%s "$arg_max" wc_c '%s' "$max_esc"
+else
+	skip arg_max_str
+	skip arg_max_str:%s
+
+	skip arg_max_esc
+	skip arg_max_esc:%b
+	skip arg_max_esc:%s
+fi