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139 lines
4.1 KiB
Bash
Executable File
139 lines
4.1 KiB
Bash
Executable File
#!/bin/sh
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# test program group handling
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# Copyright (C) 2011-2026 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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. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
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print_ver_ timeout env
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require_trap_signame_
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require_kill_group_
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# construct a program group hierarchy as follows:
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# timeout-group - foreground group
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# group.sh - separate group
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# timeout.cmd - same group as group.sh
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#
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# We then send a SIGUSR1 to the "separate group"
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# to simulate what happens when a terminating signal
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# is sent to the foreground group.
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setsid true || skip_ "setsid required to control groups"
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printf '%s\n' '#!'"$SHELL" > timeout.cmd || framework_failure_
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cat >> timeout.cmd <<\EOF
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trap 'touch sig.received; exit' USR1
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trap
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touch timeout.running
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count=$1
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until test -e sig.received || test $count = 0; do
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sleep 1
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count=$(expr $count - 1)
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done
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EOF
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chmod a+x timeout.cmd
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cat > group.sh <<EOF
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#!$SHELL
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# trap '' ensures this script ignores the signal,
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# so that the 'wait' below is not interrupted.
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# Note this then requires env --default... to reset
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# the signal disposition so that 'timeout' handles it.
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# Alternatively one could use trap ':' USR1
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# and then handle the retry in wait like:
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# while wait; test \$? -gt 128; do :; done
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# Note also INT and QUIT signals are special for backgrounded
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# processes like this in shell as they're auto ignored
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# and can't be reset with trap to any other disposition.
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# Therefore we use the ignored signal method so any
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# termination signal can be used.
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trap '' USR1
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env --default-signal=USR1 \
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timeout -v --foreground 25 ./timeout.cmd 20&
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wait
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echo group.sh wait returned \$ret
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EOF
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chmod a+x group.sh
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check_timeout_cmd_running()
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{
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local delay="$1"
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test -e timeout.running ||
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{ sleep $delay; return 1; }
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}
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check_timeout_cmd_exiting()
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{
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local delay="$1"
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test -e sig.received ||
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{ sleep $delay; return 1; }
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}
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# Terminate any background processes
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cleanup_() { kill $pid 2>/dev/null && wait $pid; }
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# Start above script in its own group.
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# We could use timeout for this, but that assumes an implementation.
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setsid ./group.sh & pid=$!
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# Wait 6.3s for timeout.cmd to start
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retry_delay_ check_timeout_cmd_running .1 6 || fail=1
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# Simulate a Ctrl-C to the group to test timely exit
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kill -USR1 -- -$pid
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wait
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test -e sig.received || fail=1
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rm -f sig.received timeout.running
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# On Linux ensure we kill the monitored command
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# even if we're terminated abnormally (e.g., get SIGKILL).
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if grep '^#define HAVE_PRCTL 1' "$CONFIG_HEADER" >/dev/null; then
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timeout -sUSR1 25 ./timeout.cmd 20 & pid=$!
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# Wait 6.3s for timeout.cmd to start
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retry_delay_ check_timeout_cmd_running .1 6 || fail=1
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kill -KILL -- $pid
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wait
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# Wait 6.3s for timeout.cmd to exit
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retry_delay_ check_timeout_cmd_exiting .1 6 || fail=1
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rm -f sig.received timeout.running
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fi
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# Ensure cascaded timeouts work
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# or more generally, ensure we timeout
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# commands that create their own group
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# This didn't work before 8.13.
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start=$(date +%s)
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# Note the first timeout must send a signal that
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# the second is handling for it to be propagated to the command.
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# termination signals are implicitly handled unless ignored.
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timeout -sALRM 30 timeout -sUSR1 25 ./timeout.cmd 20 & pid=$!
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# Wait 6.3s for timeout.cmd to start
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retry_delay_ check_timeout_cmd_running .1 6 || fail=1
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kill -ALRM $pid # trigger the alarm of the first timeout command
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wait $pid
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ret=$?
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test $ret -eq 124 ||
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skip_ "timeout returned $ret. SIGALRM not handled?"
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test -e sig.received || fail=1
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end=$(date +%s)
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test $(expr $end - $start) -lt 20 ||
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skip_ "timeout.cmd didn't receive a signal until after sleep?"
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Exit $fail
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