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:
/*
* Non-implemented system calls get redirected here.
*/
asmlinkage long sys_ni_syscall(void)
{
return -ENOSYS;
}
Are there any remining questions?
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