List of STREAMS Programming References

Communications Programming Concepts

List of STREAMS Programming References

The list includes:

See "List of STREAMS Commands" for information about STREAMS commands for configuring and managing.

Operation

streamio

Lists the ioctl operations which perform a variety of control functions on streams.

Modules and Drivers

The following modules and drivers are used in the STREAMS environment. The references are found in the list of subroutines.

pfmod	Selectively removes upstream data messages on a stream.
timod	Converts a set of streamio operations into STREAMS messages.
tirdwr	Supports the Transport Interface functions of the Network Services library.
xtiso	Provides access to sockets-based protocols to STREAMS applications.
dlpi	Provides an interface to the data link provider.

Subroutines

t_accept	Accepts a connect request.
t_alloc	Allocates a library structure.
t_bind	Binds an address to a transport endpoint.
t_close	Closes a transport endpoint.
t_connect	Establishes a connection with another transport user.
t_error	Produces an error message.
t_free	Frees a library structure.
t_getinfo	Gets protocol-specific service information.
t_getstate	Gets the current state.
t_listen	Listens for a connect request.
t_look	Looks at the current event on a transport endpoint.
t_open	Establishes a transport endpoint.
t_optmgmt	Manages options for a transport endpoint.
t_rcv	Receives normal data or expedited data sent over a connection.
t_rcvconnect	Receives the confirmation from a connect request.
t_rcvdis	Retrieves information from disconnect.
t_rcvrel	Acknowledges receipt of an orderly release indication.
t_rcvudata	Receives a data unit.
t_rcvuderr	Receives a unit data error indication.
t_snd	Sends data or expedited data over a connection.
t_snddis	Sends a user-initiated disconnect request.
t_sndrel	Initiates an orderly release of a transport connection.
t_sndudata	Sends a data unit to another transport user.
t_sync	Synchronizes transport library.
t_unbind	Disables a transport endpoint.

Function

isastream

Tests a file descriptor.

System Calls

getmsg	Gets the next message off a stream.
getpmsg	Gets the next priority message off a stream.
putmsg	Sends a message on a stream.
putpmsg	Sends a priority message on a stream.

Utilities

The following utilities are used by STREAMS:

adjmsg	Trims bytes in a message.
allocb	Allocates message and data blocks.
backq	Returns a pointer to the queue behind a given queue.
bcanput	Tests for flow control in the given priority band.
bufcall	Recovers from a failure of the allocb utility.
canput	Tests for available room in a queue.
copyb	Copies a message block.
copymsg	Copies a message.
datamsg	Tests whether message is a data message.
dupb	Duplicates a message-block descriptor.
dupmsg	Duplicates a message.
enableok	Enables a queue to be scheduled for service.
esballoc	Allocates message and data blocks.
flushband	Flushes the messages in a given priority band.
flushq	Flushes a queue.
freeb	Frees a single message block.
freemsg	Frees all message blocks in a message.
getadmin	Returns a pointer to a module.
getmid	Returns a module ID.
getq	Gets a message from a queue.
insq	Puts a message at a specific place in a queue.
linkb	Concatenates two messages into one.
mi_bufcall	Provides a reliable alternative to the bufcall utility.
mi_close_comm	Performs housekeeping during STREAMS module close operations.
mi_next_ptr	Traverses a STREAMS module's linked list of open streams.
mi_open_comm	Performs housekeeping during STREAMS module open operations.
msgdsize	Gets the number of data bytes in a message.
noenable	Prevents a queue from being scheduled.
OTHERQ	Returns the pointer to the mate queue.
pullupmsg	Concatenates and aligns bytes in a message.
putbq	Returns a message to the beginning of a queue.
putctl	Passes a control message.
putctl1	Passes a control message with a one-byte parameter.
putnext	Passes a message to the next queue.
putq	Puts a message on a queue.
qenable	Enables a queue.
qreply	Sends a message on a stream in the reverse direction.
qsize	Finds the number of messages on a queue.
RD	Gets the pointer to the read queue.
rmvb	Removes a message block from a message.
rmvq	Removes a message from a queue.
splstr	Sets the processor level.
splx	Terminates a section of code.
srv	Services queued messages for STREAMS modules or drivers.
str_install	Installs STREAMS modules and drivers.
strlog	Generates STREAMS error-logging and event-tracing messages.
strqget	Obtains information about a queue or band of the queue.
testb	Checks for an available buffer.
timeout	Schedules a function to be called after a specified interval.
unbufcall	Cancels a bufcall request.
unlinkb	Removes a message block from the head of a message.
untimeout	Cancels a pending time-out request.
unweldq	Removes a previously established weld connection between STREAMS queues.
wantio	Register direct I/O entry points with the stream head.
weldq	Establishes a unidirectional connection between STREAMS queues.
WR	Retrieves a pointer to the write queue.