From: E S <eero.saynatkari@...>
Date: 2005-01-21T02:57:48+09:00
Subject: Re: trouble with ruby_options() on win32 and ruby 1.8.2

David Craine wrote:
>
> On Jan 18, 2005, at 5:18 PM, E S wrote:
>
>>> L�hett�j�: David Craine <dave@infoether.com>
>>> Aihe: trouble with ruby_options() on win32 and ruby 1.8.2
>>>
>>> I'm trying to embed ruby into a win32 application; however, when
>>> calling the ruby_options() method my process simply hangs. I am trying
>>> to use ruby_options() to pass the -C argument to ruby to set the
>>> current directory. My code looks like this:
>>>
>>> UINT launchRuby()
>>> {
>>> char *argv[3] =
>>> {
>>> "ruby",
>>> "-C..\\Release",
>>> "test.rb"
>>> }
>>>
>>> ruby_init();
>>> ruby_options(3, argv);
>>> ruby_run();
>>> }
>>>
>>> My program compiles and links properly; however, when I run it it just
>>> hangs right after the ruby_options() call (I've integrated some
>>> diagnostic code to determine this). This same technique worked fine on
>>> OSX, so I'm wondering if there is some issue with the Windows platform.
>>
>>
>> See http://www.ruby-doc.org/doxygen/1.8.1/eval_8c-source.html#l01345
>> and http://www.ruby-doc.org/doxygen/1.8.1/ruby_8c-source.html#l01104
>> and http://www.ruby-doc.org/doxygen/1.8.1/ruby_8c-source.html#l00425
>>
>> It looks like the first argument may have to be the script name.
>>
>> E
>
> Actually, the source code indicates that the first argument should be
> the ruby program name, i.e., "ruby". This is how it worked on OSX and
> should be the same on win32. thanks for the idea, though.

Hm, strange. I did just quickly read it, maybe it's simply confusingly
expressed. You may well be right, it's just superfluous in that case :)

01103 void
01104 ruby_process_options(argc, argv)
01105 int argc;
01106 char **argv;
01107 {
01108 origargc = argc; origargv = argv;
01109
01110 ruby_script(argv[0]); // <== This here
01111 rb_argv0 = rb_progname;
01112 #if defined(USE_DLN_A_OUT)
01113 dln_argv0 = argv[0];
01114 #endif
01115 proc_options(argc, argv);
01116
01117 if (do_check && ruby_nerrs == 0) {
01118 printf("Syntax OK\n");
01119 exit(0);
01120 }
01121 if (do_print) {
01122 rb_parser_append_print();
01123 }
01124 if (do_loop) {
01125 rb_parser_while_loop(do_line, do_split);
01126 }
01127 }
01128

...

01002 void
01003 ruby_script(name)
01004 char *name;
01005 {
01006 if (name) {
01007 rb_progname = rb_tainted_str_new2(name);
01008 ruby_sourcefile = rb_source_filename(name);
01009 }
01010 }