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win32.c: check error of SetFilePointer

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* win32/win32.c (setup_overlapped): check the error code in addition
  to the result of SetFilePointer() to determine if an error occurred,
  because INVALID_SET_FILE_POINTER is a valid value.
  [ruby-core:55098] [Bug #8431]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@40888 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2013-05-22 06:19:03 +00:00
parent 38302ca719
commit a815b56d84
3 changed files with 22 additions and 3 deletions
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7
ChangeLog
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@ -1,4 +1,9 @@
Wed May 22 15:17:30 2013 Nobuyoshi Nakada <nobu@ruby-lang.org>
Wed May 22 15:18:59 2013 Nobuyoshi Nakada <nobu@ruby-lang.org>
* win32/win32.c (setup_overlapped): check the error code in addition
to the result of SetFilePointer() to determine if an error occurred,
because INVALID_SET_FILE_POINTER is a valid value.
[ruby-core:55098] [Bug #8431]
* win32/win32.c (setup_overlapped, finish_overlapped): extract from
rb_w32_read() and rb_w32_write().

11
test/ruby/test_io.rb
View file

@ -2673,4 +2673,15 @@ End
IO.select(tempfiles)
}, bug8080
end
def test_seek_32bit_boundary
bug8431 = '[ruby-core:55098] [Bug #8431]'
make_tempfile {|t|
assert_ruby_status(["-e", <<-"end;", t.path], "", bug8431)
f = ARGF.to_io
f.seek(0xffff_ffff)
f.read(1)
end;
}
end
end

7
win32/win32.c
View file

@ -6028,8 +6028,11 @@ setup_overlapped(OVERLAPPED *ol, int fd)
#define INVALID_SET_FILE_POINTER ((DWORD)-1)
#endif
if (low == INVALID_SET_FILE_POINTER) {
errno = map_errno(GetLastError());
return -1;
DWORD err = GetLastError();
if (err != NO_ERROR) {
errno = map_errno(err);
return -1;
}
}
ol->Offset = low;
ol->OffsetHigh = high;