* miscfuncs.cc (check_iovec_for_read): Don't check buffer when zero length

iov_len.
(check_iovec_for_write): Ditto.
* fhandler.h (fhandler_base::readv): New method.
(fhandler_base::writev): Ditto.
* fhandler.cc (fhandler_base::readv): New method.
(fhandler_base::writev): Ditto.
* syscalls.cc (_read): Delegate to readv(2).
(_write): Ditto, mutatis mutandi.
(readv): Rewrite, based on the old _read code, to use the new
fhandler_base::readv method.  Improve access mode handling and ensure all calls
reach the final strace statement.
(writev): Ditto, mutatis mutandi.
* include/sys/uio.h (struct iovec): Change field types to match SUSv3.
* winsup.h (check_iovec_for_read): New function.
(check_iovec_for_write): Ditto.
* miscfuncs.cc (check_iovec_for_read): Ditto.
(check_iovec_for_write): Ditto.

1 files changed, 5 insertions, 4 deletions

diff --git a/winsup/cygwin/include/sys/uio.h b/winsup/cygwin/include/sys/uio.h
index d355ac5b6..e28f14e7e 100644
--- a/winsup/cygwin/include/sys/uio.h
+++ b/winsup/cygwin/include/sys/uio.h
@@ -1,6 +1,6 @@
 /* sys/uio.h
 
-   Copyright 1996, 2000, 2001 Red Hat, Inc.
+   Copyright 1996, 2000, 2001, 2002 Red Hat, Inc.
 
 This file is part of Cygwin.
 
@@ -24,9 +24,10 @@ __BEGIN_DECLS
  * Define the uio buffers used for writev, readv.
  */
 
-struct iovec {
-	caddr_t iov_base;
-	int iov_len;
+struct iovec
+{
+  void *iov_base;
+  size_t iov_len;
 };
 
 extern ssize_t readv __P ((int filedes, const struct iovec *vector, int count));