Bug #8550

On Windows Process.spawn 'command', 'arg1', 'arg2', ... evals the arguments

Added by Maurizio De Santis 10 months ago. Updated 8 months ago.

[ruby-core:55572]
Status:Closed
Priority:Normal
Assignee:-
Category:doc
Target version:-
ruby -v:ruby 2.0.0p195 (2013-05-14) [x64-mingw32] Backport:1.9.3: UNKNOWN, 2.0.0: UNKNOWN

Description

=begin
Environment: ruby 2.0.0p195 (2013-05-14) x64-mingw32 on Windows 7 64bit

According to the Process.spawn documentation, the syntax 'cmdname, arg1, ...' doesn't involve the shell. Indeed, on Unix this is true: ((%Process.spawn 'echo', '$PATH'%)) prints '$PATH'.

But on Windows the behaviour is different: executing ((%Process.spawn 'echo', '%Path%'%)) prints the contents of the Path environment variable.

I think the behaviour should be the same on the different OSes; at least, if it is not possible, the documentation should point it out.
=end

0001-Add-caveats-to-Process-spawn-regarding-shell-built-i.patch Magnifier (1.8 KB) Steve Klabnik, 08/06/2013 12:14 AM

Associated revisions

Revision 42391
Added by Zachary Scott 8 months ago

  • process.c: [DOC] Document caveats of command form of Process.spawn with regard to the shell and OS. Patched by Steve Klabnik [Bug #8550]

History

#1 Updated by Luis Lavena 10 months ago

Hello,

On Windows, 'echo' is not an external command, is part of cmd.exe internal commands, like cd and others.

#2 Updated by Nobuyoshi Nakada 10 months ago

  • Category set to doc

This is a spec.
Otherwise you have to write system(ENV["COMSPEC"], "/c", "echo foo"), and it seems too messy.

Patches for the rdoc are welcome.

#3 Updated by Steve Klabnik 8 months ago

I've attached a patch for the RDOC, what do you think?

#4 Updated by Zachary Scott 8 months ago

  • Status changed from Open to Closed
  • % Done changed from 0 to 100

This issue was solved with changeset r42391.
Maurizio, thank you for reporting this issue.
Your contribution to Ruby is greatly appreciated.
May Ruby be with you.


  • process.c: [DOC] Document caveats of command form of Process.spawn with regard to the shell and OS. Patched by Steve Klabnik [Bug #8550]

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