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https://github.com/coreutils/coreutils.git
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Pádraig Brady
46776b5e80
These signals are used by timeout(1) itself, so need special handling. Since commit v8.13-11-g80a1aca0d we incorrectly ignored them, which was exacerbated by commit v8.26-39-g2f69dba5d which caused the -sCHLD case to hang upon child exit. * src/timeout.c (send_sig): Don't ignore SIGHLD, and discard the self sent SIGALRM, and rearm the handler. * tests/timeout/timeout.sh: Add test cases. * NEWS: Mention the fixes. Discovered by Anthropic's OSS Scanner, as bug ANT-2026-2EQL2L05.
137 lines
4.6 KiB
Bash
Executable File
137 lines
4.6 KiB
Bash
Executable File
#!/bin/sh
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# Validate timeout basic operation
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# Copyright (C) 2008-2026 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_ timeout env
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require_trap_signame_
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# no timeout
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timeout 10 true || fail=1
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# no timeout (suffix check)
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timeout 1d true || fail=1
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# disabled timeout
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timeout 0 true || fail=1
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# exit status propagation
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returns_ 2 timeout 10 sh -c 'exit 2' || fail=1
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# timeout
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returns_ 124 timeout .1 sleep 10 || fail=1
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# exit status propagation even on timeout
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# exit status should be 128+TERM
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returns_ 124 timeout --preserve-status .1 sleep 10 && fail=1
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# kill delay. Note once the initial timeout triggers,
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# the exit status will be 124 even if the command
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# exits on its own accord.
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# exit status should be 128+KILL
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returns_ 124 timeout -s0 -k1 .1 sleep 10 && fail=1
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# Ensure a consistent exit status with --foreground
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returns_ 124 timeout --foreground -s0 -k1 .1 sleep 10 && fail=1
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# Keep handling SIGALRM after sending it to the process group.
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# Also use a tiny kill delay to check that its SIGALRM is not discarded.
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for delay in .1 1e-9; do
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returns_ 137 timeout -s ALRM -k $delay .1 \
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env --ignore-signal=ALRM sleep 10 || fail=1
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done
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# Keep handling SIGCHLD so the command's exit wakes the monitor.
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returns_ 124 timeout -s KILL 10 timeout -s CHLD .1 sleep .5 || fail=1
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# Ensure 'timeout' is immune to parent's SIGCHLD handler
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# Use a subshell and an exec to work around a bug in FreeBSD 5.0 /bin/sh.
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(
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trap '' CHLD
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exec timeout 10 true
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) || fail=1
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# Don't be confused when starting off with a child (Bug#9098).
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# Use setsid to avoid sleep being in the test's process group, as
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# upon reparenting it can trigger an orphaned process group SIGHUP
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# (if there were stopped processes like in tests/tail/overlay-headers.sh).
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if setsid true; then
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out=$(setsid sleep .1 & exec timeout .5 sh -c 'sleep 2; echo foo')
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status=$?
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test "$out" = "" && test $status = 124 || fail=1
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fi
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# Verify --verbose output
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cat > exp <<\EOF
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timeout: sending signal 0 to command 'sleep'
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timeout: sending signal KILL to command 'sleep'
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EOF
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for opt in -v --verbose; do
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timeout --foreground $opt -s0 -k .1 .1 sleep 10 2> errt
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sed '/^Killed/d' < errt > err || framework_failure_
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compare exp err || fail=1
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done
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# Ensure we propagate all terminating signals.
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# Specifically here we're testing that SIGPIPE is handled.
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# I.e., that we're not killed by the SIGPIPE (and leave the sleep running).
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# timeout would exit with 141 usually if SIGPIPE wasn't being handled.
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echo 124 > timeout.exp || framework_failure_
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for opt in '' '--foreground'; do
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{ timeout -s KILL 10 timeout $opt -v .1 sleep 10 2>&1
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echo $? >timeout.status; } | :
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compare timeout.exp timeout.status || fail=1
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done
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# Ensure we don't catch/propagate ignored signals
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(trap '' PIPE && timeout 10 yes |:) 2>&1 |
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grep 'Broken pipe' >/dev/null || fail=1
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# A diagnostic exceeding the file-size limit must not loop on SIGXFSZ.
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if (trap - XFSZ && ulimit -f 0) 2>/dev/null; then
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returns_ 124 timeout -s KILL 10 sh -c '
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trap - XFSZ
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ulimit -f 0 || exit 1
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exec timeout --foreground -v .1 sleep 10 2>err
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' || fail=1
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fi
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# Signal the command and its group before writing to a blocked stderr.
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file_seen() { sleep "$1"; test -s "$file"; }
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file=term.seen
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timeout -v .1 sh -c 'trap "echo 1 >term.seen" TERM; yes >&2' 2>&1 |
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{ retry_delay_ file_seen .1 6 || touch term.missed; }
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test -e term.missed && fail=1
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# A group-wide SIGKILL must not wait for the verbose diagnostic either.
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file=kill.status
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{ timeout -v -s KILL .1 yes 2>&1
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echo $? >kill.status; } |
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{ retry_delay_ file_seen .1 6 || touch kill.missed; }
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test -e kill.missed && fail=1
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echo 137 > kill.exp || framework_failure_
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compare kill.exp kill.status || fail=1
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# --kill-after must interrupt a blocked diagnostic for the initial signal.
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file=kill-after.status
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{ timeout -v -k .1 .1 sh -c 'trap "" TERM; exec yes >&2' 2>&1
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echo $? >kill-after.status; } |
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{ retry_delay_ file_seen .1 6 || touch kill-after.missed; }
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test -e kill-after.missed && fail=1
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compare kill.exp kill-after.status || fail=1
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Exit $fail
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