On Tue, Mar 5, 2019 at 7:26 PM <valdis.kletnieks@vt.edu> wrote:
On Tue, 05 Mar 2019 19:08:20 -0500, Umair Khan said:
I was just roaming around the linux source code when I stumbled upon this line - https://github.com/torvalds/linux/blob/master/include/linux/syscalls.h#L1200
May I know what is the use of this system call?
/* * Not a real system call, but a placeholder for syscalls which are * not implemented -- see kernel/sys_ni.c */ asmlinkage long sys_ni_syscall(void);
Well, did you go look at kernel/sys_ni.c like it told you to? Because if you bothered reading the first 2 dozen lines of that file, you would find:
Yes I looked at this file actually.
/* * Non-implemented system calls get redirected here. */ asmlinkage long sys_ni_syscall(void) { return -ENOSYS; }
Are there any remining questions?
I was just wondering why are these system calls not implemented? -Umair