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Re: DESTROY handler changes child exit status? (feature $?)

by Anonymous Monk
on May 09, 2013 at 07:21 UTC ( #1032737=note: print w/ replies, xml ) Need Help??

Comment on Re: DESTROY handler changes child exit status? (feature $?)
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Re^2: DESTROY handler changes child exit status? (feature $? and win32 bug)
by Anonymous Monk on May 09, 2013 at 07:36 UTC
    Ha, I'm on win32, using  local $?; reveals a bug in the fork emulation, the effect is opposite of what it should be, using local $? should not cause $? to be used for exit value (which should be the default behavior)
    package Foo; use strict; use warnings; sub new { bless {}, shift; } sub DESTROY { warn "$$: destroy"; local $? if @ARGV; system("waaaah"); } package main; use strict; use warnings; use POSIX ":sys_wait_h"; my $foo = Foo->new(); my $pid = fork(); die "fork failed" if !defined $pid; if( $pid ) { # parent print "$$: parent\n"; } else { # child print "$$: child\n"; # system("waaaah"); exit 5; } my $reaped = waitpid($pid, 0); print "reaped( $reaped) \$?( $? ) >> 8 ( @{[ $? >> 8 ]} )\n"; #~ my $child_exit_status = POSIX::WEXITSTATUS($?); #~ print "pid=$reaped status: $child_exit_status\n"; __END__ $ perl fudge 2060: parent -3360: child -3360: destroy at fudge line 8. 'waaaah' is not recognized as an internal or external command, operable program or batch file. reaped( -3360) $?( 0 ) >> 8 ( 0 ) 2060: destroy at fudge line 8. 'waaaah' is not recognized as an internal or external command, operable program or batch file. $ perl fudge local 1628: parent -3804: child -3804: destroy at fudge line 8. 'waaaah' is not recognized as an internal or external command, operable program or batch file. reaped( -3804) $?( 1280 ) >> 8 ( 5 ) 1628: destroy at fudge line 8. 'waaaah' is not recognized as an internal or external command, operable program or batch file.

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