                   = 0  SYS_FORK                           = 0  SYS_READ                           = 0  SYS_WRITE                          = 0  SYS_OPEN                           = 0  SYS_CLOSE                          = 0  SYS_WAIT0                          = 0  SYS_LINK                           = 0  SYS_UNLINK                         = 00  SYS_CHDIR                  