A/UX® Programmer's Reference

intro(2) intro(2)
struct */
ushort msg_ qnum; /* number of msgs on q */
ushort msg_qbytes; /* max number of bytes on q */
ushort msg_lspid; /* pid of last msgsnd
operation */
ushort msg_lrpid: /* pid of last msgrcv
operation */
time t msg_stime: /* last msgsnd time */
time t msg_rtime: /* last msgrcv time */
-
time t msg_ctime:
-
/* last change time */
/* times measured in secs
since 00:00:00 GMT, 1/1/70 */
msgyerm is an ipcyerm structure that specifies the message
operation permission (described later). This structure includes the
following members:
ushort cuid: /* creator user 10 */
ushort cgid: /* creator group 10 */
ushort uid: /* user 10 */
ushort gid: /* group 10 */
ushort mode: /* r/w permission */
msg qnum is the number of messages currently on the queue.
msg - qbytes is the maximum number of bytes allowed on the
queue. msg lspid is the process ID of the last process that performed
a msgsnd operation. msg lrpid is the process ID of
the last process that performed a msgrcv operation.
msg_stime is the time of the last msgsnd operation,
msg rtime is the time of the last msgrcv operation, and
msg - ctime is the time of the last msgctl(2) operation that
changed a member of the msgyerm structure.
Semaphore Identifier
A semaphore identifier (semid) is a unique positive integer created
by a semget(2) system call. Each semid has a set of semaphores
and a data structure associated with it. The data structure is referred
to as semid _ ds and contains the following members:
struct ipc_perm sem_perm: /* operation permission
ushort sem_nsems;
time t sem otime:
time-t sem=ctime:
struct */
/* number of sems in set */
/* last operation time */
/* last change time */
/* times measured in sees since
00:00:00 GMT, 1/1/1970 */
semyerm is an ipc_perm structure that specifies the semaphore
operation permission (described later in this section). This
February, 1990 15
Revision C