Bug #13546: std steams are closed in Windows app.

• Status: Rejected
• Assignee: -
• Target version: -
• ruby -v: 2.3.3
• Backport: 2.2: UNKNOWN, 2.3: UNKNOWN, 2.4: UNKNOWN

[alex (Alex Epifanov)]

We are embedding Ruby VM into a windows app ( msvc2015 CRT ). VM fails to initialize in Init_IO with 'closed stream', when initing stdin, stdout and stderr. Debugging shows that fileno() call for stdin and stderr returns -2 value and it is not and error according to MSDN:

https://msdn.microsoft.com/en-us/en-en/library/zs6wbdhx.aspx
"If stdout or stderr is not associated with an output stream (for example, in a Windows application without a console window), the file descriptor returned is -2. In previous versions, the file descriptor returned was -1. This change allows applications to distinguish this condition from an error."

Applying following patch to rb_io_check_closed seems to resolve the issue:

#ifdef _WIN32
    if ((fptr->fd < 0) && (fptr->fd != -2) ) {
#else
    if (fptr->fd < 0) {
#endif
	rb_raise(rb_eIOError, closed_stream);
    }

[nobu (Nobuyoshi Nakada)]

• Description updated (diff)
• Status changed from Open to Feedback

Do you call ruby_sysinit?

[alex (Alex Epifanov)]

nobu (Nobuyoshi Nakada) wrote:

Do you call ruby_sysinit?

Our initialization code looks like this:

    RUBY_INIT_STACK;
    ruby_init();
#if defined(WIN32)
    rb_w32_sysinit(NULL,NULL);
#endif

[nobu (Nobuyoshi Nakada)]

• Status changed from Feedback to Rejected

Where do you define WIN32?
Note that the predefined macro is _WIN32.
And the call to rb_w32_sysinit must be before ruby_init, and the arguments must not be NULL.