# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1654124930 -7200
# Node ID 6843bd7ade1b1679f6142e7a1771c8d55ec34d72
# Parent  c3b65dd2fb6a1fef00b77ab6e02a833b9d2dd195
Introduced a function to obtain opening flags from region mapper flags.

diff -r c3b65dd2fb6a -r 6843bd7ade1b libfsclient/include/fsclient/file.h
--- a/libfsclient/include/fsclient/file.h	Mon May 30 00:47:07 2022 +0200
+++ b/libfsclient/include/fsclient/file.h	Thu Jun 02 01:08:50 2022 +0200
@@ -112,6 +112,7 @@
 long file_mmap(file_t *file, offset_t position, offset_t length,
                offset_t start_visible, offset_t end_visible,
                l4re_rm_flags_t region_flags);
+flags_t file_opening_flags(l4re_rm_flags_t rm_flags);
 l4re_rm_flags_t file_region_flags(flags_t flags);
 long file_resize(file_t *file, offset_t size);
 
diff -r c3b65dd2fb6a -r 6843bd7ade1b libfsclient/lib/src/file.cc
--- a/libfsclient/lib/src/file.cc	Mon May 30 00:47:07 2022 +0200
+++ b/libfsclient/lib/src/file.cc	Thu Jun 02 01:08:50 2022 +0200
@@ -378,6 +378,18 @@
   return L4_EOK;
 }
 
+/* Return opening flags compatible with the given region flags. */
+
+flags_t file_opening_flags(l4re_rm_flags_t rm_flags)
+{
+  if ((rm_flags & L4RE_RM_F_RW) == L4RE_RM_F_RW)
+    return O_RDWR;
+  else if (rm_flags & L4RE_RM_F_W)
+    return O_WRONLY;
+  else
+    return O_RDONLY;
+}
+
 /* Return mmap flags corresponding to the file access flags. */
 
 l4re_rm_flags_t file_region_flags(flags_t flags)