From: Tyler Knappe <tyler.knappe@...>
Date: 2009-06-24T01:19:01+09:00
Subject: Re: Capturing System Call Return Values?

Roger Pack wrote:
> 
> Hmm.
> 
>>> `bad`
> (irb):1: command not found: bad
> => ""
>>> $?
> => #<Process::Status: pid=27331,exited(127)>
>>> system("bad")
> => false
> irb(main):004:0> $?
> => #<Process::Status: pid=27335,exited(127)>
> 
> Appears a little buggy on windows for some reason.
> 
> C:\dev\blade_copy>irb
>>> `bad`
>>> $?
> => #<Process::Status: pid=5636,exited(0)> # this is wrong
>>> system("bad")
> => false
>>> $?
> => #<Process::Status: pid=0,exited(127)>
>>> `bad`
>>> $?
> => #<Process::Status: pid=0,exited(127)> # and now it's right. Odd.
> 
> -=r

irb(main):008:0> path = "python [..path..]/test.py"  => "python 
[..path..]/test.py"
irb(main):009:0> test = %x[#{path}]
=> "Testing! my script \n2nd line\n"
irb(main):010:0> test
=> "Testing! my script \n2nd line\n"
irb(main):011:0> $?
=> #<Process::Status: pid=22782,exited(0)>
irb(main):012:0> test = `python [..path..]/test.py`
=> "Testing! my script \n2nd line\n"
irb(main):013:0> test
=> "Testing! my script \n2nd line\n"
irb(main):014:0> $?
=> #<Process::Status: pid=22826,exited(0)>
irb(main):015:0>

test =/= True in either case, which is what I was looking for, nor is 
$?.
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