[ruby-core:30504] [Bug #3321][Rejected] Kernel#system do not execute command in subshell even if it contains variable assignments

Issue #3321 has been updated by Yusuke Endoh.

Status changed from Open to Rejected

Hi,

> So '=' must also be a special character to be recognized as a sign to execute command in subshell.

It may cause compatibility issue.

$ cat scr\=ipt
#!/bin/sh
echo arg:$*
echo scr:$scr

$ PATH=. ./ruby -e 'system("scr=ipt ./scr=ipt")'
arg:./scr=ipt
scr:

$ PATH=. ./ruby -e 'system("scr=ipt ./scr=ipt 2> /dev/null")'
arg:
scr:ipt

Yes, I admit it is a pedantic example.  But process invocation may
cause singinicant result (such as breaking system), so we cannot be
too conservative, I think.


For your purpose, I recommend you use env option

  system({"TEST" => "test"}, "./script.sh")

If you really want to execute it via shell, you can use ';'

  system("TEST=test ./scr=ipt;")'

Thanks,

-- 
Yusuke Endoh <[e-mail]>
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