54 lines
1.8 KiB
Bash
Executable File
54 lines
1.8 KiB
Bash
Executable File
#!/bin/sh
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#
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# Check that watching a single file descriptor works as expected.
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# Allow all tests to be skipped, e.g. during a release build
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test "${SKIP_ALL_TESTS}" = "1" && exit 77
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true "${testSubject:?not set - call this from 'make check'}"
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true "${workFile1:?not set - call this from 'make check'}"
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true "${workFile2:?not set - call this from 'make check'}"
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true "${workFile3:?not set - call this from 'make check'}"
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# Skip the test if "-d" is not available.
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if ! "${testSubject}" -h | grep -Fq ' -d'; then
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echo "no \`--watchfd' / \`-d' option on this platform"
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exit 77
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fi
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seq 1 100 > "${workFile1}"
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# Run a background process to perform a few reads from a file.
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# We only start doing anything once the PV process below has started (the
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# workFile3 check).
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# NB we just export line to make shellcheck think it's used.
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true > "${workFile3}"
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(
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while test -e "${workFile3}" && ! test -s "${workFile3}"; do sleep 0.1; done
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export line; sleep 1; read -r line; sleep 1; read -r line; sleep 1
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) <"${workFile1}" &
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pid=$!
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sleep 0.1
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"${testSubject}" -P "${workFile3}" -d "${pid}:0" -f -i 0.5 >/dev/null 2>"${workFile2}"
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# Skip the test if "-d" does not work.
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if grep -Fq ' -d: not available' "${workFile2}"; then
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echo "no \`--watchfd' / \`-d' option on this platform"
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exit 77
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fi
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# There should be at least 2 different numbers starting the output lines.
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positionsReported="$(tr '\r' '\n' < "${workFile2}" | awk '{print $1}' | sort -n | uniq)"
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differentNumbers="$(printf "%s\n" "${positionsReported}" | grep -Ec .)"
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if ! test "${differentNumbers}" -gt 1; then
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printf "%s\n" "Expected at least 2 different numbers to be output"
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printf "%s:\n%s\n" "Positions reported" "${positionsReported}"
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printf "%s: %s\n" "Number of different values seen" "${differentNumbers}"
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printf "%s\n" "Raw output:"
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tr '\r' '\n' < "${workFile2}"
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exit 1
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fi
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exit 0
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