C++ (Cpp) rtems_filesystem_eval_path_has_token Examples

Example #1

File: sup_fs_eval_path.c Project: 0871087123/rtems

void rtems_filesystem_eval_path_continue(
  rtems_filesystem_eval_path_context_t *ctx
)
{
  int eval_flags;

  while (ctx->pathlen > 0) {
    (*ctx->currentloc.mt_entry->ops->eval_path_h)(ctx);
  }

  eval_flags = rtems_filesystem_eval_path_get_flags(ctx);
  if (rtems_filesystem_eval_path_has_token(ctx)) {
    bool make = (eval_flags & RTEMS_FS_MAKE) != 0;

    if (make) {
      check_access(ctx, RTEMS_FS_PERMS_WRITE);
    } else {
      rtems_filesystem_eval_path_error(ctx, ENOENT);
    }
  } else {
    bool exclusive = (eval_flags & RTEMS_FS_EXCLUSIVE) != 0;

    if (!exclusive) {
      check_access(ctx, ctx->flags);
    } else {
      rtems_filesystem_eval_path_error(ctx, EEXIST);
    }
  }
}

Example #2

File: open.c Project: AoLaD/rtems

static int do_open(
  rtems_libio_t *iop,
  const char *path,
  int oflag,
  mode_t mode
)
{
  int rv = 0;
  int fd = rtems_libio_iop_to_descriptor( iop );
  int rwflag = oflag + 1;
  bool read_access = (rwflag & _FREAD) == _FREAD;
  bool write_access = (rwflag & _FWRITE) == _FWRITE;
  bool make = (oflag & O_CREAT) == O_CREAT;
  bool exclusive = (oflag & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL);
  bool truncate = (oflag & O_TRUNC) == O_TRUNC;
  int eval_flags = RTEMS_FS_FOLLOW_LINK
    | (read_access ? RTEMS_FS_PERMS_READ : 0)
    | (write_access ? RTEMS_FS_PERMS_WRITE : 0)
    | (make ? RTEMS_FS_MAKE : 0)
    | (exclusive ?  RTEMS_FS_EXCLUSIVE : 0);
  rtems_filesystem_eval_path_context_t ctx;

  rtems_filesystem_eval_path_start( &ctx, path, eval_flags );

  if ( rtems_filesystem_eval_path_has_token( &ctx ) ) {
    create_regular_file( &ctx, mode );
  }

  if ( write_access ) {
    const rtems_filesystem_location_info_t *currentloc =
      rtems_filesystem_eval_path_get_currentloc( &ctx );
    mode_t type = rtems_filesystem_location_type( currentloc );

    if ( S_ISDIR( type ) ) {
      rtems_filesystem_eval_path_error( &ctx, EISDIR );
    }
  }

  iop->flags |= rtems_libio_fcntl_flags( oflag );
  rtems_filesystem_eval_path_extract_currentloc( &ctx, &iop->pathinfo );
  rtems_filesystem_eval_path_cleanup( &ctx );

  rv = (*iop->pathinfo.handlers->open_h)( iop, path, oflag, mode );

  if ( rv == 0 ) {
    if ( truncate ) {
      rv = ftruncate( fd, 0 );
      if ( rv != 0 ) {
        (*iop->pathinfo.handlers->close_h)( iop );
      }
    }

    if ( rv == 0 ) {
      rv = fd;
    } else {
      rv = -1;
    }
  }

  if ( rv < 0 ) {
    rtems_libio_free( iop );
  }

  return rv;
}