...the driver. Sometimes the major number was used: 0x03 for the HDIO_* ioctls, 0x06 for the LP* ioctls. And sometimes one or more ASCII letters were used. For example, TCGETS has ….../time of last modification via shmctl() */ pid_t shm_cpid; /* PID of creator */ pid_t shm_lpid; /* PID of last shmat(2)/shmdt(2) */ shmatt_t shm_nattch; /* No. of current attach…...with the shared memory segment as follows: • shm_atime is set to the current time. • shm_lpid is set to the process-ID of the calling process. • shm_nattch is incremented by one…...with the shared memory segment as follows: • shm_atime is set to the current time. • shm_lpid is set to the process-ID of the calling process. • shm_nattch is incremented by one…...with the shared memory segment as follows: • shm_atime is set to the current time. • shm_lpid is set to the process-ID of the calling process. • shm_nattch is incremented by one…...o the least significant 9 bit of shmflg . • shm_segsz is set to the value of size . • shm_lpid , shm_nattch , shm_atime , and shm_dtime are set to 0. • shm_ctime is set to the c…...F extends cBPF in multiple ways, including the ability to call a fixed set of in-kernel helper functions (via the BPF_CALL opcode extension provided by eBPF) and access shared d…