84 lines
2.6 KiB
Bash
Executable File
84 lines
2.6 KiB
Bash
Executable File
#!/bin/sh
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#
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# Check that watching a process's file descriptors 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 "${workFile3:?not set - call this from 'make check'}"
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true "${workFile4:?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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seq 1 300 > "${workFile2}"
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# Run a background process to perform a few reads from a file, opening a
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# second file after a moment.
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# We only start doing anything once the PV process below has started (the
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# workFile3 check).
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# NB we just export line to make shellcheck think it's used.
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true > "${workFile3}"
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(
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while ! test -s "${workFile3}"; do sleep 0.1; done
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export line
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sleep 1
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read -r line
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exec 9<"${workFile2}"
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sleep 1
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read -r line
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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 "${pid}" -f -i 0.5 >/dev/null 2>"${workFile4}"
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# Skip the test if "-d" does not work.
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if grep -Fq ' -d: not available' "${workFile4}"; then
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echo "no \`--watchfd' / \`-d' option on this platform"
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exit 77
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fi
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# Process the output to make it easier to handle.
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# NB "ESC [ A" is "cursor up", we turn that into "-" and a newline.
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tr '\r' '\n' < "${workFile4}" | sed 's/.\[A/-!/g' | tr '!' '\n' > "${workFile1}"
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# We should see at least 2 file positions for fd 0.
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positionsReported="$(awk '/^ *0:/ {print $2}' < "${workFile1}" | sort -n | uniq)"
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differentNumbers="$(printf "%s\n" "${positionsReported}" | grep -Ec .)"
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if ! test "${differentNumbers}" -gt 1; then
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printf "%s\n" "Expected at least 2 different numbers to be output for fd 0"
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printf "%s:\n%s\n" "Positions reported" "${positionsReported}"
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printf "%s: %s\n" "Number of different values seen" "${differentNumbers}"
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printf "%s\n" "Raw output:"
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cat "${workFile1}"
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exit 1
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fi
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# We should see file descriptor 9 appear.
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if ! grep -Eq '^ *9:' < "${workFile1}"; then
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printf "%s\n" "Expected to see information for fd 9"
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printf "%s\n" "Raw output:"
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cat "${workFile1}"
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exit 1
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fi
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# We should see the last 6 characters of fd 9's filename appear.
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lastChars="$(printf "%s\n" "${workFile2}" | rev | cut -b1-6 | rev)"
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if ! grep -Fq "${lastChars}:" < "${workFile1}"; then
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printf "%s\n" "Expected to see a filename for fd 9"
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printf "%s\n" "Raw output:"
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cat "${workFile1}"
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exit 1
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fi
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exit 0
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