vhangup(2) System Calls Manual vhangup(2) vhangup - LIBRARY Standard C library (libc, -lc) #include int vhangup(void); glibc (. feature_test_macros(7)): vhangup(): glibc 2.21: _DEFAULT_SOURCE glibc 2.19 2.20: _DEFAULT_SOURCE || (_XOPEN_SOURCE && _XOPEN_SOURCE < 500) glibc 2.19, : _BSD_SOURCE || (_XOPEN_SOURCE && _XOPEN_SOURCE < 500) vhangup() . , . On success, zero is returned. On error, -1 is returned, and errno is set to indicate the error. EPERM vhangup(); CAP_SYS_TTY_CONFIG. Linux. . init(1), capabilities(7) Azamat Hackimov , Dmitriy Ovchinnikov , Dmitry Bolkhovskikh , Katrin Kutepova , Yuri Kozlov ; GNU 3 , . . , , . Linux man-pages 6.06 31 2023 . vhangup(2)