mirror of
https://github.com/coreutils/coreutils.git
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a966dcdb69
Update to latest gnulib with new copyright year. Run "make update-copyright" and then... * gnulib: Update included in this commit as copyright years are the only change from the previous gnulib commit. * tests/init.sh: Sync with gnulib to pick up copyright year. * bootstrap: Manually update copyright year, until we fully sync with gnulib at a later stage. * tests/sample-test: Adjust to use the single most recent year.
107 lines
3.9 KiB
Bash
Executable File
107 lines
3.9 KiB
Bash
Executable File
#!/bin/sh
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# Ensure that tail does not ignore a tailed-forever file that has been
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# replaced between tail's initial read-to-EOF, and when the inotify watches
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# are established in tail_forever_inotify. That new file would be ignored
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# indefinitely.
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# Copyright (C) 2015-2024 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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. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
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print_ver_ tail sleep
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grep '^#define HAVE_INOTIFY 1' "$CONFIG_HEADER" >/dev/null && is_local_dir_ . \
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|| skip_ 'inotify is not supported'
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# Terminate any background gdb/tail process
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cleanup_() {
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kill $pid 2>/dev/null && wait $pid
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kill $sleep 2>/dev/null && wait $sleep
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}
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touch file || framework_failure_
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touch tail.out || framework_failure_
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( timeout 10s gdb --version ) > gdb.out 2>&1
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case $(cat gdb.out) in
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*'GNU gdb'*) ;;
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*) skip_ "can't run gdb";;
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esac
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# Break on a line rather than a symbol, to cater for inline functions
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break_src="$abs_top_srcdir/src/tail.c"
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break_line=$(grep -n ^tail_forever_inotify "$break_src") || framework_failure_
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break_line=$(echo "$break_line" | cut -d: -f1) || framework_failure_
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# Note we get tail to monitor a background sleep process
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# rather than using timeout(1), as timeout sends SIGCONT
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# signals to its monitored process, and gdb (7.9 at least)
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# has _intermittent_ issues with this.
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# Sending SIGCONT resulted in either delayed child termination,
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# or no child termination resulting in a hung test.
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# See https://sourceware.org/bugzilla/show_bug.cgi?id=18364
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env sleep 10 & sleep=$!
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# See if gdb works and
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# tail_forever_inotify is compiled and run
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gdb -nx --batch-silent \
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--eval-command="break $break_line" \
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--eval-command="run --pid=$sleep -f file" \
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--eval-command='quit' \
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tail < /dev/null > gdb.out 2>&1
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kill $sleep || skip_ 'breakpoint not hit'
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wait $sleep
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# FIXME: The above is seen to _intermittently_ fail with:
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# warning: .dynamic section for "/lib/libc.so.6" is not at the expected address
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# warning: difference appears to be caused by prelink, adjusting expectations
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compare /dev/null gdb.out || skip_ "can't set breakpoints in tail"
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env sleep 10 & sleep=$!
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echo never-seen-with-tail-8.23 > file.new || framework_failure_
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# Run "tail -F file", stopping to replace with a new file before
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# inotify initialization, and then continue. Before the fix,
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# changes to the new file would effectively be ignored.
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gdb -nx --batch-silent \
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--eval-command="break $break_line" \
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--eval-command="run --pid=$sleep -F file 2>tail.err >>tail.out" \
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--eval-command='shell mv file.new file' \
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--eval-command='continue' \
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--eval-command='quit' \
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tail < /dev/null > /dev/null 2>&1 & pid=$!
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# Note even updating the watched 'file' wouldn't have output
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# anything between coreutils 7.5 and 8.23 inclusive as
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# The old file descriptor (still held open by tail) was being fstat().
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tail --pid=$pid -f tail.out | (read REPLY; kill $pid)
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# gdb has a bug in Debian's gdb-6.8-3 at least that causes it to not
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# cleanup and exit correctly when it receives a SIGTERM, but
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# killing sleep, should cause the tail process and thus gdb to exit.
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kill $sleep
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wait $sleep
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wait $pid
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compare /dev/null tail.out && { cat tail.err; fail=1; }
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Exit $fail
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