| 1 | # Demo for https://github.com/oilshell/oil/issues/986
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| 2 | #
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| 3 | # Usage:
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| 4 | # $SH demo/signal-during-read.sh <function name>
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| 5 | #
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| 6 | # Example:
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| 7 | # bin/osh demo/signal-during-read bash_read
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| 8 | #
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| 9 | # bash and zsh explicitly handle EINTR during the 'read' builtin, and run
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| 10 | # pending traps! OSH should do this too.
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| 11 |
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| 12 | # Related: demo/sigwinch-bug.sh
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| 13 |
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| 14 | handler() {
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| 15 | echo "SIGHUP received" >&2
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| 16 | }
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| 17 |
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| 18 | slow() {
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| 19 | for i in 1 2 3; do
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| 20 | echo $i
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| 21 | sleep $i
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| 22 | done
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| 23 | }
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| 24 |
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| 25 | trap handler HUP
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| 26 |
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| 27 | echo "PID $$"
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| 28 | #echo "SHELL $SHELL"
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| 29 |
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| 30 | # Note: unlike the read builtin, none of bash/dash/zsh run signal handlers
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| 31 | # during an interrupted read.
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| 32 | command_sub() {
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| 33 | echo "command sub"
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| 34 | echo 'a=$(slow)'
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| 35 | a=$(slow)
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| 36 | echo "status=$? a=$a"
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| 37 | echo ---
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| 38 | }
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| 39 |
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| 40 | # There are several different kinds of 'read', test them all
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| 41 |
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| 42 | bash_read() {
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| 43 | echo 'read x'
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| 44 | read x
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| 45 | echo
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| 46 | echo "status=$? x=$x"
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| 47 |
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| 48 | echo 'read -n 3 y'
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| 49 | read -n 3 y
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| 50 | echo "status=$? y=$y"
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| 51 | echo ---
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| 52 |
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| 53 | echo 'read -d , z'
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| 54 | read -d , z
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| 55 | echo "status=$? z=$z"
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| 56 | echo ---
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| 57 |
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| 58 | echo 'mapfile'
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| 59 | mapfile
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| 60 | echo "status=$? MAPFILE=${MAPFILE[@]}"
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| 61 | echo ---
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| 62 | }
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| 63 |
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| 64 | osh_read() {
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| 65 | echo 'read --line'
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| 66 | read --line
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| 67 | echo "status=$? _line=$_line"
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| 68 | echo ---
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| 69 |
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| 70 | echo 'read --all'
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| 71 | read --all
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| 72 | echo "status=$? _all=$_all"
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| 73 | echo ---
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| 74 | }
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| 75 |
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| 76 | "$@"
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