diff options
Diffstat (limited to 'cpukit/libcsupport/src/ftruncate.c')
-rw-r--r-- | cpukit/libcsupport/src/ftruncate.c | 51 |
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 ); +} |