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67 lines
2.2 KiB
Bash
Executable File
67 lines
2.2 KiB
Bash
Executable File
#!/bin/sh
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# Test fold with zero width characters.
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# Copyright (C) 2025-2026 Free Software Foundation, Inc.
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
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. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
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print_ver_ fold printf
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getlimits_
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# Make sure we do not overflow the buffer.
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IO_BUFSIZE_TIMES2=$(($IO_BUFSIZE * 2))
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# Fold counts by columns by default.
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head -c $IO_BUFSIZE_TIMES2 /dev/zero | fold > out || fail=1
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test $(wc -l < out) -eq 0 || fail=1
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# Check that zero width characters are counted with --characters.
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head -c $IO_BUFSIZE_TIMES2 /dev/zero | fold --characters > out || fail=1
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test $(wc -l < out) -eq $(($IO_BUFSIZE_TIMES2 / 80)) || fail=1
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test "$LOCALE_FR_UTF8" != none || skip_ "French UTF-8 locale not available"
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LC_ALL=$LOCALE_FR_UTF8
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export LC_ALL
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test $(env printf '\u200B' | wc -L) -eq 0 ||
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skip_ "character width mismatch"
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# Same thing, but using U+200B ZERO WIDTH SPACE.
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yes $(env printf '\u200B') |
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head -n $IO_BUFSIZE_TIMES2 | tr -d '\n' > inp || framework_failure_
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fold inp > out || fail=1
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test $(wc -l < out) -eq 0 || fail=1
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fold --characters inp > out || fail=1
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test $(wc -l < out) -eq $(($IO_BUFSIZE_TIMES2 / 80)) || fail=1
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# Ensure bounded memory operation.
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test -w /dev/full && test -c /dev/full &&
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vm=$(get_min_ulimit_v_ fold /dev/null) && {
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# \303 results in EILSEQ on input
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for c in '\n' '\0' '\303'; do
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tr '\0' "$c" < /dev/zero | timeout 10 $SHELL -c \
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"(ulimit -v $(($vm+12000)) && fold 2>err >/dev/full)"
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ret=$?
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test -f err || skip_ 'shell ulimit failure'
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{ test $ret = 124 || ! grep 'space' err >/dev/null; } &&
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{ fail=1; cat err; echo "fold didn't diagnose ENOSPC" >&2; }
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done
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}
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Exit $fail
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