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356 lines
7.3 KiB
Text
356 lines
7.3 KiB
Text
# Tests for both trap builtin and TRAP* functions.
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%prep
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setopt localtraps
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mkdir traps.tmp && cd traps.tmp
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%test
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fn1() {
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trap 'print EXIT1' EXIT
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fn2() { trap 'print EXIT2' EXIT; }
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fn2
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}
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fn1
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0:Nested `trap ... EXIT'
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>EXIT2
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>EXIT1
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fn1() {
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TRAPEXIT() { print EXIT1; }
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fn2() { TRAPEXIT() { print EXIT2; }; }
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fn2
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}
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fn1
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0: Nested TRAPEXIT
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>EXIT2
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>EXIT1
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fn1() {
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trap 'print EXIT1' EXIT
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fn2() { trap - EXIT; }
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fn2
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}
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fn1
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0:Nested `trap - EXIT' on `trap ... EXIT'
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>EXIT1
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fn1() {
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TRAPEXIT() { print EXIT1; }
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fn2() { trap - EXIT; }
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fn2
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}
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fn1
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0:Nested `trap - EXIT' on `TRAPEXIT'
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>EXIT1
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# We can't test an EXIT trap for the shell as a whole, because
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# we're inside a function scope which we don't leave when the
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# subshell exits. Not sure if that's the correct behaviour, but
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# it's sort of consistent.
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( fn1() { trap 'print Function 1 going' EXIT; exit; print Not reached; }
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fn2() { trap 'print Function 2 going' EXIT; fn1; print Not reached; }
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fn2
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)
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0:EXIT traps on functions when exiting from function
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>Function 1 going
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>Function 2 going
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# $ZTST_exe is relative to the parent directory.
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# We ought to fix this in ztst.zsh...
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(cd ..
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$ZTST_exe -fc 'TRAPEXIT() { print Exited.; }')
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0:EXIT traps on a script
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>Exited.
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fn1() {
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trap -
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trap
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trap 'print INT1' INT
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fn2() { trap 'print INT2' INT; trap; }
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trap
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fn2
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trap
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}
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fn1
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0: Nested `trap ... INT', not triggered
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>trap -- 'print INT1' INT
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>trap -- 'print INT2' INT
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>trap -- 'print INT1' INT
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fn1() {
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trap -
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trap
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TRAPINT() { print INT1; }
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fn2() { TRAPINT() { print INT2; }; trap; }
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trap
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fn2
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trap
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}
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fn1
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0: Nested TRAPINT, not triggered
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>TRAPINT () {
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> print INT1
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>}
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>TRAPINT () {
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> print INT2
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>}
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>TRAPINT () {
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> print INT1
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>}
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fn1() {
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trap -
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trap 'print INT1' INT
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fn2() { trap - INT; trap; }
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trap
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fn2
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trap
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}
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fn1
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0: Nested `trap - INT' on untriggered `trap ... INT'
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>trap -- 'print INT1' INT
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>trap -- 'print INT1' INT
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# Testing the triggering of traps here is very unpleasant.
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# The delays are attempts to avoid race conditions, though there is
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# no guarantee that they will work. Note the subtlety that the
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# `sleep' in the function which receives the trap does *not* get the
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# signal, only the parent shell, which is waiting for a SIGCHILD.
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# (At least, that's what I think is happening.) Thus we have to wait at
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# least the full two seconds to make sure we have got the output from the
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# execution of the trap.
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print -u $ZTST_fd 'This test takes at least three seconds...'
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fn1() {
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trap 'print TERM1' TERM
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fn2() { trap 'print TERM2; return 1' TERM; sleep 2; }
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fn2 &
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sleep 1
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kill -TERM $!
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sleep 2
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}
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fn1
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0: Nested `trap ... TERM', triggered on inner loop
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>TERM2
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print -u $ZTST_fd 'This test, too, takes at least three seconds...'
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fn1() {
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trap 'print TERM1; return 1' TERM
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fn2() { trap 'print TERM2; return 1' TERM; }
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fn2
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sleep 2
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}
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fn1 &
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sleep 1
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kill -TERM $!
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sleep 2
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0: Nested `trap ... TERM', triggered on outer loop
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>TERM1
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TRAPZERR() { print error activated; }
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fn() { print start of fn; false; print end of fn; }
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fn
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fn() {
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setopt localoptions localtraps
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unfunction TRAPZERR
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print start of fn
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false
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print end of fn
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}
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fn
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unfunction TRAPZERR
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print finish
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0: basic localtraps handling
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>start of fn
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>error activated
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>end of fn
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>start of fn
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>end of fn
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>finish
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TRAPZERR() { print 'ERR-or!'; }
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f() { print f; false; }
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t() { print t; }
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f
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f && t
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t && f && true
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t && f
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testunset() {
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setopt localtraps
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unset -f TRAPZERR
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print testunset
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false
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true
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}
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testunset
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f
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print status $?
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unfunction TRAPZERR
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0: more sophisticated error trapping
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>f
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>ERR-or!
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>f
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>t
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>f
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>t
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>f
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>ERR-or!
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>testunset
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>f
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>ERR-or!
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>status 1
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f() {
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setopt localtraps
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TRAPWINCH() { print "Window changed. That wrecked the test."; }
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}
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f
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f
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functions TRAPWINCH
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1:Unsetting ordinary traps with localtraps.
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#
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# Returns from within traps are a perennial problem.
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# The following two apply to returns in and around standard
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# ksh-style traps. The intention is that a return value from
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# within the function is preserved (i.e. statuses set by the trap
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# are ignored) unless the trap explicitly executes `return', which makes
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# it return from the enclosing function.
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#
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fn() { trap 'true' EXIT; return 1; }
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fn
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1: ksh-style EXIT traps preserve return value
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inner() { trap 'return 3' EXIT; return 2; }
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outer() { inner; return 1; }
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outer
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3: ksh-style EXIT traps can force return status of enclosing function
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# Autoloaded traps are horrid, but unfortunately people expect
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# them to work if we support them.
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echo "print Running exit trap" >TRAPEXIT
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${${ZTST_exe##[^/]*}:-$ZTST_testdir/$ZTST_exe} -fc '
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fpath=(. $fpath)
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autoload TRAPEXIT
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print "Exiting, attempt 1"
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exit
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print "What?"
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'
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${${ZTST_exe##[^/]*}:-$ZTST_testdir/$ZTST_exe} -fc '
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fpath=(. $fpath)
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autoload TRAPEXIT;
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fn() { print Some function }
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fn
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print "Exiting, attempt 2"
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exit
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'
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0: autoloaded TRAPEXIT (exit status > 128 indicates an old bug is back)
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>Exiting, attempt 1
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>Running exit trap
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>Some function
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>Exiting, attempt 2
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>Running exit trap
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print -u $ZTST_fd Another test that takes three seconds
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gotsig=0
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signal_handler() {
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echo "parent received signal"
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gotsig=1
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}
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child() {
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sleep 1
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echo "child sending signal"
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kill -15 $parentpid
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sleep 2
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echo "child exiting"
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exit 33
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}
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parentpid=$$
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child &
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childpid=$!
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trap signal_handler 15
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echo "parent waiting"
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wait $childpid
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cstatus=$?
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echo "wait #1 finished, gotsig=$gotsig, status=$cstatus"
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gotsig=0
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wait $childpid
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cstatus=$?
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echo "wait #2 finished, gotsig=$gotsig, status=$cstatus"
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0:waiting for trapped signal
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>parent waiting
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>child sending signal
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>parent received signal
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>wait #1 finished, gotsig=1, status=143
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>child exiting
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>wait #2 finished, gotsig=0, status=33
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fn1() {
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setopt errexit
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trap 'echo error1' ZERR
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false
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print Shouldn\'t get here 1a
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}
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fn2() {
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setopt errexit
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trap 'echo error2' ZERR
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return 1
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print Shouldn\'t get here 2a
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}
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fn3() {
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setopt errexit
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TRAPZERR() { echo error3; }
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false
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print Shouldn\'t get here 3a
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}
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fn4() {
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setopt errexit
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TRAPZERR() { echo error4; }
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return 1
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print Shouldn\'t get here 4a
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}
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(fn1; print Shouldn\'t get here 1b)
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(fn2; print Shouldn\'t get here 2b)
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(fn3; print Shouldn\'t get here 3b)
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(fn4; print Shouldn\'t get here 4b)
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1: Combination of ERR_EXIT and ZERR trap
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>error1
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>error2
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>error3
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>error4
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fn1() { TRAPZERR() { print trap; return 42; }; false; print Broken; }
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(fn1)
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print Working $?
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0: Force return of containing function from TRAPZERR.
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>trap
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>Working 42
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fn2() { trap 'print trap; return 42' ZERR; false; print Broken }
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(fn2)
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print Working $?
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0: Return with non-zero status triggered from within trap '...' ZERR.
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>trap
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>Working 42
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fn3() { TRAPZERR() { print trap; return 0; }; false; print OK this time; }
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(fn3)
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print Working $?
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0: Normal return from TRAPZERR.
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>trap
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>OK this time
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>Working 0
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fn4() { trap 'print trap; return 0' ZERR; false; print Broken; }
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(fn4)
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print Working $?
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0: Return with zero status triggered from within trap '...' ZERR.
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>trap
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>Working 0
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%clean
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rm -f TRAPEXIT
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