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;
}
