fusl/src/stdio/__stdio_seek.c

#include "stdio_impl.h"

off_t __stdio_seek(FILE* f, off_t off, int whence) {
  off_t ret;
#ifdef SYS__llseek
  if (syscall(SYS__llseek, f->fd, off >> 32, off, &ret, whence) < 0)
    ret = -1;
#else
  ret = syscall(SYS_lseek, f->fd, off, whence);
#endif
  return ret;
}