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The core.load-stdin test checks Zeek's ability to read scripts from stdin. core.sigterm-regular and core.sigterm-stdin verify that SIGTERM shuts down a Zeek process during normal operation and while reading script content from stdin, respectively. For technical reasons we don't test with SIGINT, as ctrl-c would trigger -- see comments for details.
63 lines
1.8 KiB
Bash
63 lines
1.8 KiB
Bash
# This test verifies that Zeek, while reading stdin to parse scripts, terminates
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# upon SIGTERM.
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#
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# Running Zeek in a way that portably delivers SIGINT (as ctrl-c would do) is
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# tricky. With job control done locally in this script, even when run by an
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# interactive bash, SIGINT is blocked. When running via btest-bg-run, the
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# backgrounded processes have their SIGINT and SIGQUIT blocked, per POSIX:
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# https://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html
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#
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# Use a separate output file since btest-bg-wait replaces .stdout/.stderr:
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# @TEST-EXEC: bash %INPUT >output 2>&1
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# Helper to return the PID of the Zeek process launched in the background.
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zeek_pid() {
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# The btest-bg-run .pid file contains the parent of the Zeek process
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local ppid=$(cat zeek/.pid)
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ps -xo pid,ppid,comm | awk "\$2 == \"$ppid\" && \$3 == \"zeek\" { print \$1 }"
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}
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cleanup() {
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btest-bg-wait -k 5
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}
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trap cleanup EXIT
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# Launch Zeek so it stalls, reading from stdin.
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mkfifo input
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btest-bg-run zeek "cat ../input | zeek"
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# Wait until we see Zeek running.
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for i in $(seq 10); do
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pid=$(zeek_pid)
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[ -n "$pid" ] && break
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sleep 1
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done
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if [ -z "$pid" ]; then
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echo "Couldn't determine Zeek PID"
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exit 1
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fi
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# Now try several times to terminate the process via SIGTERM. We try repeatedly
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# because we might hit Zeek in a brief window in time where the signal is
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# blocked -- it gets unblocked during the parsing stage, since this enables
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# ctrl-c to work during interactive input.
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#
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# Terminating Zeek does not terminate the "cat", since the latter would only
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# notice upon a data write that the pipe is gone. We leave it to btest-bg-wait
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# to clean up at exit.
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for i in $(seq 10); do
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kill $pid
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[ -z "$(zeek_pid)" ] && break
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sleep 1
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done
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pid=$(zeek_pid)
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if [ -n "$pid" ]; then
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echo "Zeek PID $pid did not shut down"
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exit 1
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fi
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exit 0
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