ref: ec73849b6936d839410ccb239d14b2f7c7ca3d6f dir: /sys/src/ape/lib/ap/amd64/_seek.c/
extern long __SEEK(long long*, int, long long, int); long long _SEEK(int fd, long long o, int p) { long long l; if(__SEEK(&l, fd, o, p) < 0) l = -1; return l; }