# \[Bug:trunk\] IO behaviors on mingw

**URL:** <https://www.ruby-forum.com/t/bug-trunk-io-behaviors-on-mingw/184204>\
**Category:** Development\
**Created:** [February 26, 2010, 5:17pm UTC](https://www.ruby-forum.com/t/bug-trunk-io-behaviors-on-mingw/184204 "2010-02-26T17:17:24Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![Yusuke\_ENDOH](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/y/c89c15/32.png) [@Yusuke\_ENDOH](https://www.ruby-forum.com/u/Yusuke_ENDOH)\
**Post date:** [February 26, 2010, 5:17pm UTC](https://www.ruby-forum.com/t/bug-trunk-io-behaviors-on-mingw/184204/1 "2010-02-26T17:17:24Z")

</div>

akr e$B$5$se(B  
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1. $ ./ruby -e ‘f = File.open(“foo”, “w”); IO.for\_fd(f.fileno, “r”)’  
linux: EINVAL  
mingw: e$B2?$b8@$o$J$$e(B (gets e$B$7$?$ie(B EBADF)  
e$B;29Me(B: [http://redmine.ruby-lang.org/issues/show/1582](http://redmine.ruby-lang.org/issues/show/1582)

2. $ ./ruby -e ‘f1 = File.open(“foo”, “w”); f2 = IO.new(f1.fileno); p  
f2.gets’  
linux: IOError  
mingw: EBADF

3. $ rm foo && touch foo && ./ruby -e ‘f = File.open(“foo”); p f.eof?;  
p f.getc; f.ungetc(100); p f.eof?; p f.getc’  
linux: true, nil, false, “d”  
mingw: true, nil, true, “d”

4. $ echo foo \> foo && ./ruby -e ‘f = File.open(“foo”); f.getc; p  
f.pos; f.ungetc(100); p f.pos’  
linux: 1, 0  
mingw: 1, 1

5. $ ./ruby -e ‘File.open(“foo”, “w”) {|f|  
f.write\_nonblock(“012345678901234567890123456789”) }’  
linux: e$BIaDL$K=q$-9~$^$l$ke(B  
mingw: EBADF

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---

<div class="post-metadata">

**Author:** ![Yusuke\_ENDOH](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/y/c89c15/32.png) [@Yusuke\_ENDOH](https://www.ruby-forum.com/u/Yusuke_ENDOH)\
**Post date:** [February 26, 2010, 5:46pm UTC](https://www.ruby-forum.com/t/bug-trunk-io-behaviors-on-mingw/184204/2 "2010-02-26T17:46:06Z")

</div>

2010e$BG/e(B2e$B7ne(B27e$BF|e(B1:13 Yusuke ENDOH [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid):

> e$B0J2\<$N$h$&$K!“e(BIO e$B$K4X$7$Fe(B Linux e$B$He(B mingw e$B$G5sF0$,0c$$$^$9!#e(B  
> e$B$=$l$\>$l;EMM$G$7$g$&$+!”%P%0$G$7$g$&$+!#e(B

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[http://pub.cozmixng.org/~the-rwiki/rw-cgi.rb?cmd=view;name=Windows+��+IO](http://pub.cozmixng.org/~the-rwiki/rw-cgi.rb?cmd=view;name=Windows+%A4%CE+IO)  
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> 1. $ ./ruby -e ‘f = File.open(“foo”, “w”); IO.for\_fd(f.fileno, “r”)’  
> linux: EINVAL  
> mingw: e$B2?$b8@$o$J$$e(B (gets e$B$7$?$ie(B EBADF)  
> e$B;29Me(B: [http://redmine.ruby-lang.org/issues/show/1582](http://redmine.ruby-lang.org/issues/show/1582)

F\_GETFL e$B$,$J$$$N$GL5M}$J$s$8$c$J$$$G$7$g$&$+!#e(B

> 1. $ ./ruby -e ‘f1 = File.open(“foo”, “w”); f2 = IO.new(f1.fileno); p f2.gets’  
> linux: IOError  
> mingw: EBADF

F\_GETFL e$B$,$J$$$N$G;vA0$KD4$Y$k$N$OL5M}$J$s$8$c$J$$$G$7$g$&$+!#e(B

> 1. $ rm foo && touch foo && ./ruby -e ‘f = File.open(“foo”); p f.eof?;  
> p f.getc; f.ungetc(100); p f.eof?; p f.getc’  
> linux: true, nil, false, “d”  
> mingw: true, nil, true, “d”

cbuf e$B$G$9$+$M$'!#e(B  
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> 1. $ echo foo \> foo && ./ruby -e ‘f = File.open(“foo”); f.getc; p  
> f.pos; f.ungetc(100); p f.pos’  
> linux: 1, 0  
> mingw: 1, 1

cbuf e$B$G$9$+$M$'!#e(B  
cbuf e$B$KF~$C$F$$$k%G!\<%?$O%P%$%HNs$H$7$F$b$H$b$He(B  
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> 1. $ ./ruby -e ‘File.open(“foo”, “w”) {|f|  
> f.write\_nonblock(“012345678901234567890123456789”) }’  
> linux: e$BIaDL$K=q$-9~$^$l$ke(B  
> mingw: EBADF

Windows e$B$Ne(B non-blocking I/O e$B$Oe(B socket  
e$B@lMQ$J$s$8$c$J$$$G$7$g$&$+!#e(B

---

<div class="post-metadata">

**Author:** ![Yusuke\_ENDOH](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/y/c89c15/32.png) [@Yusuke\_ENDOH](https://www.ruby-forum.com/u/Yusuke_ENDOH)\
**Post date:** [April 24, 2010, 7:48am UTC](https://www.ruby-forum.com/t/bug-trunk-io-behaviors-on-mingw/184204/3 "2010-04-24T07:48:10Z")

</div>

e$B%A%1%C%He(B #2796 e$B$,99?7$5$l$^$7$?!#e(B (by Akira T.)

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This issue was solved with changeset r27470.  
Yusuke, thank you for reporting this issue.  
Your contribution to Ruby is greatly appreciated.  
May Ruby be with you.

* * *

[http://redmine.ruby-lang.org/issues/show/2796](http://redmine.ruby-lang.org/issues/show/2796)

---

<div class="post-metadata">

**Author:** ![Yusuke\_ENDOH](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/y/c89c15/32.png) [@Yusuke\_ENDOH](https://www.ruby-forum.com/u/Yusuke_ENDOH)\
**Post date:** [February 27, 2010, 5:12am UTC](https://www.ruby-forum.com/t/bug-trunk-io-behaviors-on-mingw/184204/4 "2010-02-27T05:12:04Z")

</div>

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In message “[ruby-dev:40508] Re: [Bug:trunk] IO behaviors on mingw”  
on Feb.27,2010 01:43:30, [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote:

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