| # Validate yes buffer handling | |
| # Copyright (C) 2015-2025 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 | |