[PATCH] pread() returns non-zero if read beyond EOF, because NtReadFile returns EOF status but doesn't set information to 0. Need reset io status block before NtReadFile is called, so that pread() will return 0 if read beyond EOF.

[Xiaofeng Liu via cygwin-patches]

--- winsup/cygwin/fhandler_disk_file.cc |    1 + 1 files changed, 1 
insertions(+), 0 deletions(-)
diff --git a/winsup/cygwin/fhandler_disk_file.cc 
b/winsup/cygwin/fhandler_disk_file.ccindex bc8fead..525cb32 100644--- 
a/winsup/cygwin/fhandler_disk_file.cc+++ 
b/winsup/cygwin/fhandler_disk_file.cc@@ -1525,6 +1525,7 @@ 
fhandler_disk_file::pread (void *buf, size_t count, off_t offset)       
IO_STATUS_BLOCK io;       LARGE_INTEGER off = { QuadPart:offset }; +      
memset(&io, 0, sizeof(io));       if (!prw_handle && prw_open (false))        
goto non_atomic;       status = NtReadFile (prw_handle, NULL, NULL, NULL, &io, 
buf, count,-- 1.7.1