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#!/bin/sh
# Validate yes buffer handling
# Copyright (C) 2015-2023 Free Software Foundation, Inc.
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
print_ver_ yes
# Check basic operation
test "$(yes | head -n1)" = 'y' || fail=1
# Check various single item sizes, with the most important
# size being BUFSIZ used for the local buffer to yes(1).
# Note a \n is added, so actual sizes required internally
# are 1 more than the size used here.
for size in 1 1999 4095 4096 8191 8192 16383 16384; do
printf "%${size}s\n" '' > out.1
yes "$(printf %${size}s '')" | head -n2 | uniq > out.2
compare out.1 out.2 || fail=1
done
# Check the many small items case,
# both fitting and overflowing the internal buffer.
# First check that 4000 arguments supported.
if test 4000 -eq $(sh -c 'echo $#' 0 $(seq 4000)); then
for i in 100 4000; do
seq $i | paste -s -d ' ' | sed p > out.1
yes $(seq $i) | head -n2 > out.2
compare out.1 out.2 || fail=1
done
fi
# Check a single appropriate diagnostic is output on write error
if test -w /dev/full && test -c /dev/full; then
# The single output diagnostic expected,
# (without the possibly varying :strerror(ENOSPC) suffix).
printf '%s\n' "yes: standard output" > exp
for size in 1 16384; do
returns_ 1 yes "$(printf %${size}s '')" >/dev/full 2>errt || fail=1
sed 's/\(yes:.*\):.*/\1/' errt > err
compare exp err || fail=1
done
fi
Exit $fail
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