intro(2) System Calls Manual intro(2) intro - 2 Linux. -- Linux. , , C, (, ) . , . C : o , , ; o , ; o errno, . , , , . 2, , C ( GNU) . , C, . Linux syscalls(2). (.., , errno(3)). C : , errno -1 . . 0, . . , , . ( , - .) . feature_test_macros(7). UNIX , , , . . standards(7). , , C . syscall(2). , _syscall, _syscall(2). . , ! .po . . _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) Azamat Hackimov , Dmitriy S. Seregin , Yuri Kozlov ; GNU 3 , . . , , . Linux man-pages 6.06 31 2023 . intro(2)