ref: 56e71d5260182e2ac32e09767b7c9440048a1d2f
dir: /sys/src/libc/amd64/_seek.c/
#include <u.h>
#include <libc.h>
extern int _seek(vlong*, int, vlong, int);
vlong
seek(int fd, vlong o, int p)
{
vlong l;
if(_seek(&l, fd, o, p) < 0)
l = -1LL;
return l;
}