libio: Add rtems_libio_iop_flags_initialize()

Update #3132.

4 files changed, 31 insertions, 8 deletions

diff --git a/cpukit/libcsupport/include/rtems/libio_.h b/cpukit/libcsupport/include/rtems/libio_.h
index ed5cd27c31..0e128032ec 100644
--- a/cpukit/libcsupport/include/rtems/libio_.h
+++ b/cpukit/libcsupport/include/rtems/libio_.h
@@ -90,6 +90,24 @@ extern rtems_filesystem_mount_table_entry_t rtems_filesystem_null_mt_entry;
 extern rtems_filesystem_global_location_t rtems_filesystem_global_location_null;
 
 /**
+ * @brief Sets the iop flags to the specified flags together with
+ * LIBIO_FLAGS_OPEN.
+ *
+ * Use this once a file descriptor allocated via rtems_libio_allocate() is
+ * fully initialized.
+ *
+ * @param[in] iop The iop.
+ * @param[in] flags The flags.
+ */
+static inline void rtems_libio_iop_flags_initialize(
+  rtems_libio_t *iop,
+  uint32_t       flags
+)
+{
+  iop->flags = LIBIO_FLAGS_OPEN | flags;
+}
+
+/**
  * @brief Sets the specified flags in the iop.
  *
  * @param[in] iop The iop.
diff --git a/cpukit/libcsupport/src/fcntl.c b/cpukit/libcsupport/src/fcntl.c
index 0fe734d61c..82052011ec 100644
--- a/cpukit/libcsupport/src/fcntl.c
+++ b/cpukit/libcsupport/src/fcntl.c
@@ -26,15 +26,14 @@
 
 static int duplicate_iop( rtems_libio_t *iop )
 {
-  int rv = 0;
+  int            rv;
+  int            oflag;
+  rtems_libio_t *diop;
 
-  rtems_libio_t *diop = rtems_libio_allocate();
+  oflag = rtems_libio_to_fcntl_flags( iop->flags );
+  diop = rtems_libio_allocate();
 
   if (diop != NULL) {
-    int oflag = rtems_libio_to_fcntl_flags( iop->flags );
-
-    rtems_libio_iop_flags_set( diop, rtems_libio_fcntl_flags( oflag ) );
-
     rtems_filesystem_instance_lock( &iop->pathinfo );
     rtems_filesystem_location_clone( &diop->pathinfo, &iop->pathinfo );
     rtems_filesystem_instance_unlock( &iop->pathinfo );
@@ -46,6 +45,10 @@ static int duplicate_iop( rtems_libio_t *iop )
      */
     rv = (*diop->pathinfo.handlers->open_h)( diop, NULL, oflag, 0 );
     if ( rv == 0 ) {
+      rtems_libio_iop_flags_initialize(
+        diop,
+        rtems_libio_fcntl_flags( oflag )
+      );
       rv = rtems_libio_iop_to_descriptor( diop );
     } else {
       rtems_libio_free( diop );
diff --git a/cpukit/libcsupport/src/libio.c b/cpukit/libcsupport/src/libio.c
index cd3a4420f6..0cc2b98c0b 100644
--- a/cpukit/libcsupport/src/libio.c
+++ b/cpukit/libcsupport/src/libio.c
@@ -116,7 +116,6 @@ rtems_libio_t *rtems_libio_allocate( void )
     iop = rtems_libio_iop_freelist;
     rtems_libio_iop_freelist = iop->data1;
     memset( iop, 0, sizeof(*iop) );
-    iop->flags = LIBIO_FLAGS_OPEN;
   }
 
   rtems_libio_unlock();
diff --git a/cpukit/libcsupport/src/open.c b/cpukit/libcsupport/src/open.c
index 2ee99f1f4c..22773454ba 100644
--- a/cpukit/libcsupport/src/open.c
+++ b/cpukit/libcsupport/src/open.c
@@ -96,13 +96,16 @@ static int do_open(
     }
   }
 
-  rtems_libio_iop_flags_set( iop, rtems_libio_fcntl_flags( oflag ) );
   rtems_filesystem_eval_path_extract_currentloc( &ctx, &iop->pathinfo );
   rtems_filesystem_eval_path_cleanup( &ctx );
 
+  iop->flags = rtems_libio_fcntl_flags( oflag );
+
   rv = (*iop->pathinfo.handlers->open_h)( iop, path, oflag, mode );
 
   if ( rv == 0 ) {
+    rtems_libio_iop_flags_set( iop, LIBIO_FLAGS_OPEN );
+
     if ( truncate ) {
       rv = ftruncate( fd, 0 );
       if ( rv != 0 ) {