(2) System Calls Manual (2) intro -- 2 Linux. Linux. , : , - C, ( ) . , . - C , : o , ; o , ; o errno, , . , , - , , , , . , , 2, , (, GNU) C . , C, . Linux syscalls(2). ' ( ' , errno(3)). - C , : ' , errno -1, . , . 0 , . . , . ( , - .) . , feature_test_macros(7). , UNIX. . standards(7). , , , C -. syscall(2). , _syscall, _syscall(2). . , ! . _syscall(2), syscall(2), syscalls(2), errno(3), intro(3), capabilities(7), credentials(7), feature_test_macros(7), mq_overview(7), path_resolution(7), pipe(7), pty(7), sem_overview(7), shm_overview(7), signal(7), socket(7), standards(7), symlink(7), system_data_types(7), sysvipc(7), time(7) Yuri Chornoivan ; , GNU General Public License Version 3 . . , , : . Linux man-pages 6.06 31 2023 (2)