my understanding was that Process.wait2[1] would be the child process
exit_status, so this is confusing:
~ > ls -e; echo $?
ls: invalid option – e
Try `ls --help’ for more information.
1
~ > ruby -e ‘fork{exec “ls -e”}; puts((Process.wait2)[1])’
ls: invalid option – e
Try `ls --help’ for more information.
256
~ > ruby -e ‘fork{exec “ls -e”}; puts((Process.wait2))’
ls: invalid option – e
Try `ls --help’ for more information.
3388
256
~ > ruby -e ‘fork{exec “ls -e”}; p((Process.wait2))’
ls: invalid option – e
Try `ls --help’ for more information.
[3399, #<Process::Status: pid=3399,exited(1)>]
obviously 256 is 1 << 8 and this is equivalent to $? - the exitstatus. can
someone eplain what the lower byte is then?
-a
···
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– Donald Knuth, “Discover”/bin/sh -c ‘for l in ruby perl;do $l -e “print "\x3a\x2d\x29\x0a"”;done’
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