hpux man page for mesg

mesg(5) 							File Formats Manual							   mesg(5)

NAME
       mesg - enable or disable System V IPC messages at boot time (OBSOLETE)

DESCRIPTION
       The tunable is obsolete.  The System V IPC message subsystem is always enabled.

   Overview
       A  System  V  message is just a sequence of bytes that can be passed between cooperating processes via a message queue.	Messages can be of
       any length up to a tunable maximum.  Messages larger than 64 bytes (not tunable) are stored in reserved kernel memory.  Messages  equal	to
       or  smaller than 64 bytes are allocated with the message header and therefore do not consume extra kernel structure to maintain the memory.
       Each message is "typed" with an application-specific number.  Each message queue is referenced by a unique ID,  and  can  contain  multiple
       individual messages.

       The  process  receiving a message can get the "first" message (FIFO), the first of a specified type, the first of a group of types, or wait
       for a specific type to appear.

WARNINGS
       Installation of optional kernel software, from HP or other vendors, may cause changes to tunable  parameter  values.   After  installation,
       some  tunable  parameters may no longer be at the default or recommended values.  For information about the effects of installation on tun-
       able values, consult the documentation for the kernel software being installed.	For information about optional kernel  software  that  was
       factory installed on your system, see at

AUTHOR
       was developed by AT&T.

SEE ALSO
       ipcrm(1), ipcs(1), msgctl(2), msgget(2), msgrcv(2), msgsnd(2), msgmnb(5), msgmni(5), msgmbs(5), msgtql(5).

OBSOLETE
						     Tunable Kernel Parameters							   mesg(5)