_llseek(2) System Calls Manual _llseek(2) _llseek - / (libc -lc) #include /* SYS_* */ #include int syscall(SYS__llseek, unsigned int fd, unsigned long offset_high, unsigned long offset_low, loff_t *result, unsigned int whence); : glibc _llseek() syscall(2). : llseek(3) lseek64(3). _llseek() fd (offset_high << 32) | offset_low whence SEEK_SET SEEK_CUR SEEK_END . result. loff_t 64 . 32 . _llseek() 0. -1 errno . EBADF fd . EFAULT . EINVAL whence . lseek(2) . . lseek(2), open(2), lseek64(3) 3 . . : . 6.18 8 2026 _llseek(2)