UNIMPLEMENTED Section: Linux Programmer's Manual (2) Updated: 12 June 2025 Index   NAME afs_syscall, break, ftime, gtty, lock, mpx, phys, prof, profil, stty, ulimit - unimplemented system calls   SYNOPSIS Unimplemented system calls.   DESCRIPTION These system calls are not implemented in the Linux 2.0 kernel.   RETURN VALUE These system calls always return -1 and set errno to ENOSYS.   NOTES Note that and are implemented as library functions. Some system calls, like and only exist on certain architectures. Some system calls, like and only exist when the Linux kernel was built with support for them.   SEE ALSO   Index NAME SYNOPSIS DESCRIPTION RETURN VALUE NOTES SEE ALSO This document was created by using the manual pages. Time: 11:56:06 GMT, March 24, 2025