afs_syscall, break, fattach, fdetach, ftime, getmsg, getpmsg, gtty,
isastream, lock, madvise1, mpx, prof, profil, putmsg, putpmsg, secu‐
rity, stty, tuxcall, ulimit, vserver - unimplemented system calls
These system calls are not implemented in the Linux kernel.
原文：https://www.cnblogs.com/xpylovely/p/11032410.html