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* process.c: [DOC] Document caveats of command form of Process.spawn

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with regard to the shell and OS. Patched by Steve Klabnik [Bug #8550]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42391 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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zzak 2013-08-05 16:42:37 +00:00
parent e171d499d8
commit 0bd6f36aa7
2 changed files with 14 additions and 1 deletions
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ChangeLog
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@ -1,3 +1,8 @@
Tue Aug 6 01:40:37 2013 Zachary Scott <e@zzak.io>
* process.c: [DOC] Document caveats of command form of Process.spawn
with regard to the shell and OS. Patched by Steve Klabnik [Bug #8550]
Tue Aug 6 01:28:35 2013 Zachary Scott <e@zzak.io>
* lib/rss/0.9.rb: [DOC] Typo in example [Bug #8732]

10
process.c
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@ -3864,7 +3864,7 @@ rb_f_system(int argc, VALUE *argv)
* name => nil : unset the environment variable
* command...:
* commandline : command line string which is passed to the standard shell
* cmdname, arg1, ... : command name and one or more arguments (no shell)
* cmdname, arg1, ... : command name and one or more arguments (This form does not use the shell. See below for caveats.)
* [cmdname, argv0], arg1, ... : command name, argv[0] and zero or more arguments (no shell)
* options: hash
* clearing environment variables:
@ -3905,6 +3905,14 @@ rb_f_system(int argc, VALUE *argv)
* current directory:
* :chdir => str
*
* The 'cmdname, arg1, ...' form does not use the shell. However,
* on different OSes, different things are provided as built-in
* commands. An example of this is 'echo', which is a built-in
* on Windows, but is a normal program on Linux and Mac OS X.
* This means that `Process.spawn 'echo', '%Path%'` will display
* the contents of the `%Path%` environment variable on Windows,
* but `Process.spawn 'echo', '$PATH'` prints the literal '$PATH'.
*
* If a hash is given as +env+, the environment is
* updated by +env+ before <code>exec(2)</code> in the child process.
* If a pair in +env+ has nil as the value, the variable is deleted.