# \[Bug #3198\] O\_APPEND for redirect fd is ignored on windows

**URL:** <https://www.ruby-forum.com/t/bug-3198-o-append-for-redirect-fd-is-ignored-on-windows/187538>\
**Category:** Development\
**Created:** [April 25, 2010, 5:36am UTC](https://www.ruby-forum.com/t/bug-3198-o-append-for-redirect-fd-is-ignored-on-windows/187538 "2010-04-25T05:36:17Z")\
**Posts on this page:** 5\
**Page:** 1

<div class="post-metadata">

**Author:** ![SSwanabe](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/d6d6ee/32.png) [@SSwanabe](https://www.ruby-forum.com/u/SSwanabe)\
**Post date:** [April 25, 2010, 5:36am UTC](https://www.ruby-forum.com/t/bug-3198-o-append-for-redirect-fd-is-ignored-on-windows/187538/1 "2010-04-25T05:36:17Z")

</div>

Bug #3198: O\_APPEND for redirect fd is ignored on windows  
[http://redmine.ruby-lang.org/issues/show/3198](http://redmine.ruby-lang.org/issues/show/3198)

e$B5/I\<\<Te(B: \_ wanabe  
e$B%9%F!\<%?%9e(B: Open, e$BM%@hEYe(B: Normal  
ruby -v: ruby 1.9.2dev (2010-04-24 trunk 22784) [i386-mingw32]

Windows7 e$B$G!"%j%@%$%l%/%HMQ$K%U%!%$%k$r%\*!\<%W%s$9$k;~e(B  
O\_APPEND e$B$rEO$7$F$bL5;k$5$l$^$9!#e(B

$ cat test.rb  
fname = “tmp.out”  
File.delete fname if File.exist? fname  
5.times do  
system(“echo a”, STDOUT=\>[fname,  
File::WRONLY|File::CREAT|File::APPEND, 0644])  
end  
p IO.read(fname)

$ ruby -v test.rb  
ruby 1.9.2dev (2010-04-24 trunk 22784) [i386-mingw32]  
“a\n”

e$B0J2\<$N$h$&$J%Q%C%A$r=q$-$^$7$?!#FC$KH?BP$,$J$1$l$P%3%\_%C%H$5$;$FD:$-$^$9!#e(B  
rb\_w32\_open  
e$B$G=hM}$9$k$3$H$b9M$($^$7$?$,!“$\*$=$i$/%j%@%$%l%/%H0J30$G$Oe(B  
O\_APPEND e$B$,8z$/$N$G$O$J$$$+$H;W$&$N$G!”$H$j$"$($:e(B process.c  
e$B$G=hM}$7$^$7$?!#e(B

# Index: process.c

— process.c (revision 27483)  
+++ process.c (working copy)  
@@ -2094,6 +2094,11 @@ run\_exec\_open(VALUE ary, VALUE save, char  
\*errmsg, size\_t errmsg\_buflen)  
ERRMSG(“open”);  
return -1;  
}  
+#if defined(\_WIN32)

- if (flags & O\_APPEND) {
- 

```
 lseek(fd2, 0, SEEK_END);

```

- }  
+#endif  
while (i \< RARRAY\_LEN(ary) &&  
(elt = RARRAY\_PTR(ary)[i], RARRAY\_PTR(elt)[1] == param))  
{  
fd = FIX2INT(RARRAY\_PTR(elt)[0]);

---

<div class="post-metadata">

**Author:** ![SSwanabe](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/d6d6ee/32.png) [@SSwanabe](https://www.ruby-forum.com/u/SSwanabe)\
**Post date:** [April 25, 2010, 6:22am UTC](https://www.ruby-forum.com/t/bug-3198-o-append-for-redirect-fd-is-ignored-on-windows/187538/2 "2010-04-25T06:22:30Z")

</div>

> Bug #3198: O\_APPEND for redirect fd is ignored on windows  
> [http://redmine.ruby-lang.org/issues/show/3198](http://redmine.ruby-lang.org/issues/show/3198)
> 
> e$B5/I\<\<Te(B: \_ wanabe  
> e$B%9%F!\<%?%9e(B: Open, e$BM%@hEYe(B: Normal  
> ruby -v: ruby 1.9.2dev (2010-04-24 trunk 22784) [i386-mingw32]
> 
> Windows7 e$B$G!"%j%@%$%l%/%HMQ$K%U%!%$%k$r%\*!\<%W%s$9$k;~e(B  
> O\_APPEND e$B$rEO$7$F$bL5;k$5$l$^$9!#e(B

e$B:,K\860x$O$J$s$J$N$G$7$g$&$+!)e(B

> +#if defined(\_WIN32)
> 
> - 
> 
> ```
> if (flags & O_APPEND) {
> 
> ```
> 
> - 
> 
> ```
> lseek(fd2, 0, SEEK_END);
> 
> ```
> 
> - 
> 
> ```
> }
> 
> ```
> 
> +#endif

e$B%l%S%e!\<$7$^$7$?!#e(Blseek(SEEK\_END)e$B$@$HB\>$N%W%m%;%9$H6%9g$7$?\>l9g$Ke(B  
e$BF1$8;v$,5/$-$^$9$,!"$3$l$OLdBj$J$$!)e(B

---

<div class="post-metadata">

**Author:** ![SSwanabe](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/d6d6ee/32.png) [@SSwanabe](https://www.ruby-forum.com/u/SSwanabe)\
**Post date:** [April 25, 2010, 6:38am UTC](https://www.ruby-forum.com/t/bug-3198-o-append-for-redirect-fd-is-ignored-on-windows/187538/3 "2010-04-25T06:38:53Z")

</div>

e$B$3$s$K$A$O!"$J$+$`$ie(B(e$B$&e(B)e$B$G$9!#e(B

In message “[ruby-dev:41055] Re: [Bug #3198] O\_APPEND for redirect fd is  
ignored on windows”  
on Apr.25,2010 13:20:15, [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote:

> > Windows7 e$B$G!"%j%@%$%l%/%HMQ$K%U%!%$%k$r%\*!\<%W%s$9$k;~e(B  
> > O\_APPEND e$B$rEO$7$F$bL5;k$5$l$^$9!#e(B
> 
> e$B:,K\860x$O$J$s$J$N$G$7$g$&$+!)e(B

fde$B$KIU?o$7$?%U%i%0$O;R%W%m%;%9$K\<u$17Q$,$l$^$;$s!#e(B  
e$B$@$C$F%U%!%$%k%G%9%/%j%W%?$J$s$F35G0e(BWindowse$B\<+BN$K$O$J$$$s$@$be(B  
e$B$s!#e(B

> > +#if defined(\_WIN32)
> > 
> > - 
> > 
> > ```
> > if (flags & O_APPEND) {
> > 
> > ```
> > 
> > - 
> > 
> > ```
> > lseek(fd2, 0, SEEK_END);
> > 
> > ```
> > 
> > - 
> > 
> > ```
> > }
> > 
> > ```
> > 
> > +#endif
> 
> e$B%l%S%e!\<$7$^$7$?!#e(Blseek(SEEK\_END)e$B$@$HB\>$N%W%m%;%9$H6%9g$7$?\>l9g$Ke(B  
> e$BF1$8;v$,5/$-$^$9$,!"$3$l$OLdBj$J$$!)e(B

e$BHr$1F@$J$$$+$i$$$$$s$8$c$J$$$G$9$+$M!#e(B

e$B$=$l$G$O!#e(B

---

<div class="post-metadata">

**Author:** ![SSwanabe](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/d6d6ee/32.png) [@SSwanabe](https://www.ruby-forum.com/u/SSwanabe)\
**Post date:** [April 25, 2010, 9:03am UTC](https://www.ruby-forum.com/t/bug-3198-o-append-for-redirect-fd-is-ignored-on-windows/187538/4 "2010-04-25T09:03:59Z")

</div>

> e$B$@$C$F%U%!%$%k%G%9%/%j%W%?$J$s$F35G0e(BWindowse$B\<+BN$K$O$J$$$s$@$be(B  
> e$B$s!#e(B

e$B$"$"!"$J$k$[$I!#$J$C$H$/!#$9$$$^$;$s6u5$FI$a$F$^$;$s$G$7$?e(B  
e$B$J$i$7$g$&$,$J$$$G$9$M!#e(B

---

<div class="post-metadata">

**Author:** ![SSwanabe](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/d6d6ee/32.png) [@SSwanabe](https://www.ruby-forum.com/u/SSwanabe)\
**Post date:** [April 25, 2010, 2:03pm UTC](https://www.ruby-forum.com/t/bug-3198-o-append-for-redirect-fd-is-ignored-on-windows/187538/5 "2010-04-25T14:03:06Z")

</div>

e$B%A%1%C%He(B #3198 e$B$,99?7$5$l$^$7$?!#e(B (by \_ wanabe)

e$B%+%F%4%je(B coree$B$K%;%C%He(B  
Target version 1.9.xe$B$K%;%C%He(B

e$B%l%S%e!\<$\*$h$SJdB-$“$j$,$H$&$4$6$$$^$9!#e(B  
e$B$=$N8e!”$3$N%Q%C%A$G$O=q$-9~$\_A0$K4{$K%]%$%s%?$,KvHx$K0\F0$7$F$$$k\>uBV$K$J$je(B  
e$BFI$_9~$_;~$Ke(B O\_APPEND  
e$B$NF0:n$H0[$J$C$F$7$^$$$h$/$J$$!"$H$$$&$3$H$,$o$+$j$^$7$?$N$Ge(B  
e$B\>e$N%Q%C%A$O\<h$j2\<$2$^$9!#e(B

## e$B$^$?!"e(B1.9.2 e$BA0$KAa5^$KD\>$9$Y$-$H$b;W$($^$;$s$N$GH=JL$N$?$a$Ke(B e$B%?!\<%2%C%H$re(B 1.9.x e$B$K$7$F$\*$-$^$9!#e(B

[http://redmine.ruby-lang.org/issues/show/3198](http://redmine.ruby-lang.org/issues/show/3198)