summaryrefslogtreecommitdiffstats
path: root/cpukit/libcsupport/src/ftruncate.c
diff options
context:
space:
mode:
Diffstat (limited to 'cpukit/libcsupport/src/ftruncate.c')
-rw-r--r--cpukit/libcsupport/src/ftruncate.c51
1 files changed, 51 insertions, 0 deletions
diff --git a/cpukit/libcsupport/src/ftruncate.c b/cpukit/libcsupport/src/ftruncate.c
new file mode 100644
index 0000000000..64946d7bb6
--- /dev/null
+++ b/cpukit/libcsupport/src/ftruncate.c
@@ -0,0 +1,51 @@
+/*
+ * ftruncate() - Truncate a File to the Specified Length
+ *
+ * COPYRIGHT (c) 1989-1999.
+ * On-Line Applications Research Corporation (OAR).
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rtems.com/license/LICENSE.
+ *
+ * $Id$
+ */
+
+#if HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <unistd.h>
+#include <errno.h>
+
+#include <rtems/libio_.h>
+#include <rtems/seterr.h>
+
+int ftruncate(
+ int fd,
+ off_t length
+)
+{
+ rtems_libio_t *iop;
+ rtems_filesystem_location_info_t loc;
+
+ rtems_libio_check_fd( fd );
+ iop = rtems_libio_iop( fd );
+ rtems_libio_check_is_open(iop);
+
+ /*
+ * Now process the ftruncate() request.
+ */
+
+ /*
+ * Make sure we are not working on a directory
+ */
+
+ loc = iop->pathinfo;
+ if ( (*loc.ops->node_type_h)( &loc ) == RTEMS_FILESYSTEM_DIRECTORY )
+ rtems_set_errno_and_return_minus_one( EISDIR );
+
+ rtems_libio_check_permissions( iop, LIBIO_FLAGS_WRITE );
+
+ return (*iop->pathinfo.handlers->ftruncate_h)( iop, length );
+}