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#!/bin/sh
# Ensure that output errors are reported with errno information.
# Copyright 2016-2021 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/>.
. "${srcdir=.}/init.sh"; path_prepend_ ../src
test -e /dev/full || skip_ your system lacks /dev/full
export LC_ALL=C
# generate large input, filling the libc stdio buffers
# and triggering a write(2) even without line buffering.
yes 12345 | head -n 50000 > in || framework_failure_
fail=0
# disk-full error, line buffered
# (note: GNU grep returns 2 on error)
returns_ 2 grep --line-buffered -v '^$' <in >/dev/full 2>err1 \
|| framework_failure_
# disk-full error, unbuffered
# (note: GNU grep returns 2 on error)
returns_ 2 grep -v '^$' <in >/dev/full 2>err2 \
|| framework_failure_
# ensure each error message file contains a 'write error' with additional text
for f in err1 err2 ;
do
grep -Eiq '^[^:]*: write error: [a-z]+' $f \
|| {
warn_ "incorrect/missing error message in file $f"
compare /dev/null $f # print the content in the logs
fail=1
}
done
# These messages should be identical
compare err1 err2 \
|| { warn_ "err1,err2 contain different error messages" ; fail=1 ; }
Exit $fail
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