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Pádraig Brady
8f7ed6cf50
* init.cfg (+get_stat_syscalls_): Refactor from ... * tests/ls/stat-free-color.sh: ... here. * tests/ls/stat-free-symlinks.sh: ... here. * tests/misc/traversal-missing.sh: ... here. * tests/shred/fifo.sh: .. here.
98 lines
2.6 KiB
Bash
Executable File
98 lines
2.6 KiB
Bash
Executable File
#!/bin/sh
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# Test that 'shred' behaves correctly on FIFOs.
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# Copyright (C) 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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. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
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print_ver_ shred
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getlimits_
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uses_strace_
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stats=$(get_stat_syscalls_)
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open_stat_fail ()
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{
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strace --quiet=all -o /dev/null -P file -e inject=open,openat:error=ENXIO \
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-e inject=$stats:error=ENOSYS "$@"
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}
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# If open fails with ENXIO and the subsequent stat fails, e.g., because the
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# FIFO was removed or it is a character or block special associated with a
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# non-existent device, we should use the error number from open.
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if open_stat_fail true; then
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cat <<EOF >exp-err || framework_failure_
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shred: file: failed to open for writing: $ENXIO
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EOF
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returns_ 1 open_stat_fail shred file >out 2>err || fail=1
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compare exp-err err || fail=1
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compare /dev/null out || fail=1
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fi
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mkfifo_or_skip_ fifo
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# Test 'shred' on a FIFO with no readers.
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cat <<\EOF >exp || framework_failure_
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shred: fifo: invalid file type
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EOF
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returns_ 1 timeout 10 shred fifo >out 2>err || fail=1
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compare /dev/null out || fail=1
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compare exp err || fail=1
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# Terminate any background processes.
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cleanup_()
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{
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for p in $pid $writer_pid; do
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kill $p 2>/dev/null
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done
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for p in $pid $writer_pid; do
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wait $p 2>/dev/null
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done
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pid=
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writer_pid=
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}
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writer_ready_()
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{
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sleep $1
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test -e writer-ready
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}
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fifo_writer_()
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{
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exec 3>fifo &&
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touch writer-ready &&
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exec sleep 20
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}
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# Test 'shred' on a FIFO with a reader. Use a temporary writer to
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# prove that 'cat' opened the FIFO before 'shred' runs, and keep that
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# writer open so 'cat' blocks until we close it.
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rm -f writer-ready || framework_failure_
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timeout 10 cat fifo > /dev/null & pid=$!
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fifo_writer_ & writer_pid=$!
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retry_delay_ writer_ready_ .1 6 || framework_failure_
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returns_ 1 timeout 10 shred fifo >out 2>err || fail=1
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compare /dev/null out || fail=1
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compare exp err || fail=1
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kill $writer_pid 2>/dev/null || framework_failure_
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wait $writer_pid 2>/dev/null
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writer_pid=
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wait $pid || fail=1 # on cat timeout
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pid=
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Exit $fail
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