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   syscall    ( 2 )

косвенный системный вызов (indirect system call)
  Name  |  Synopsis  |    Description    |  Return value  |  Note  |  Examples  |  See also  |

Описание (Description)

syscall() is a small library function that invokes the system
       call whose assembly language interface has the specified number
       with the specified arguments.  Employing syscall() is useful, for
       example, when invoking a system call that has no wrapper function
       in the C library.


       syscall() saves CPU registers before making the system call,
       restores the registers upon return from the system call, and
       stores any error returned by the system call in errno(3).


       Symbolic constants for system call numbers can be found in the
       header file <sys/syscall.h>.