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); rtems_libio_check_permissions( iop, LIBIO_FLAGS_WRITE ); /* * Now process the ftruncate() request. */ /* * Make sure we are not working on a directory */ loc = iop->pathinfo; if ( !loc.ops->node_type_h ) rtems_set_errno_and_return_minus_one( ENOTSUP ); 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 ); if ( !iop->handlers->ftruncate_h ) rtems_set_errno_and_return_minus_one( ENOTSUP ); return (*iop->handlers->ftruncate_h)( iop, length ); }
int ftruncate( int fd, off_t length ) { int rv = 0; if ( length >= 0 ) { rtems_libio_t *iop; rtems_libio_check_fd( fd ); iop = rtems_libio_iop( fd ); rtems_libio_check_is_open( iop ); rtems_libio_check_permissions( iop, LIBIO_FLAGS_WRITE ); rv = (*iop->pathinfo.handlers->ftruncate_h)( iop, length ); } else { errno = EINVAL; rv = -1; } return rv; }
long fpathconf( int fd, int name ) { long return_value; rtems_libio_t *iop; rtems_filesystem_limits_and_options_t *the_limits; rtems_libio_check_fd(fd); iop = rtems_libio_iop(fd); rtems_libio_check_is_open(iop); rtems_libio_check_permissions(iop, LIBIO_FLAGS_READ); /* * Now process the information request. */ the_limits = &iop->pathinfo.mt_entry->pathconf_limits_and_options; switch ( name ) { case _PC_LINK_MAX: return_value = the_limits->link_max; break; case _PC_MAX_CANON: return_value = the_limits->max_canon; break; case _PC_MAX_INPUT: return_value = the_limits->max_input; break; case _PC_NAME_MAX: return_value = the_limits->name_max; break; case _PC_PATH_MAX: return_value = the_limits->path_max; break; case _PC_PIPE_BUF: return_value = the_limits->pipe_buf; break; case _PC_CHOWN_RESTRICTED: return_value = the_limits->posix_chown_restrictions; break; case _PC_NO_TRUNC: return_value = the_limits->posix_no_trunc; break; case _PC_VDISABLE: return_value = the_limits->posix_vdisable; break; case _PC_ASYNC_IO: return_value = the_limits->posix_async_io; break; case _PC_PRIO_IO: return_value = the_limits->posix_prio_io; break; case _PC_SYNC_IO: return_value = the_limits->posix_sync_io; break; default: rtems_set_errno_and_return_minus_one( EINVAL ); break; } return return_value; }