#include <stdio.h>
#include <string.h>
#include <stropts.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <sys/socket.h>

main(int argc, const char **argv)
{
		int	s, i;
		unsigned int	mods;
		struct str_list	mod_list;struct str_mlist *mlist;
		/* Get a socket... */

		if ((s = socket(AF_INET, SOCK_STREAM, 0)) <= 0) {
			perror("socket: ");
			exit(1);
		}

		/* Determine the number of modules in the stream */	
		if ((mods = ioctl(s, I_LIST, 0)) < 0) {
			perror("I_LIST ioctl");
		}
		if (mods == 0) {
			printf("No modules\n");
			exit(1);
		} else {
			printf("%d modules\n", mods);
		}

		/* Allocate memory for all of the module names */
		mlist = (struct str_mlist *)
		calloc(mods, sizeof (struct str_mlist));
		if (mlist == 0) {
			perror("malloc failure");
			exit(1);
		}
		mod_list.sl_modlist = mlist;
		mod_list.sl_nmods = mods;
		/* Do the ioctl and get the module names... */
		if (ioctl(s, I_LIST, &mod_list) < 0) {
			exit(1);
		}

		/* Print out the name of the modules... */
		for (i = 0; i < mods; i++) {
			printf("s: %s\n", mod_list.sl_modlist[i].l_name);
		}

		/* Free the calloc'd structures... */
		free(mlist);
		return(0);
}

I_ANCHOR

Prevents the removal of a STREAMS module with an I_POP call. Any process can place an anchor on a stream, but once placed, an anchor can only be removed by a privileged process.

I_LOOK

Retrieves the name of the module just below the stream head

I_FLUSH

Flushes all input or output queues

I_FLUSHBAND

Flushes a band of messages

I_FIND

Compares the names of all modules present in the stream to a specific name

I_PEEK

Enables the user to look at information in the first message on the stream head read queue without taking the message off the queue

I_SRDOPT

Sets the read mode using a series of flag options in the argument

I_GRDOPT

Indicates the read mode in an int

I_NREAD

Counts the data bytes in data blocks in the first message on the stream head read queue

I_FDINSERT

Creates a message from a user buffer, adds information about another stream, and sends the message downstream

I_SWROPT

Sets the write mode using the value of the argument

I_GWROPT

Returns the current write mode setting

I_SENDFD

Requests that the stream send a message with file pointer to the stream head at the other end of a STREAMS pipe

I_RECVFD

Retrieves the file descriptor of the message sent by an I_SENDFD ioctl(2) over a STREAMS pipe

I_ATMARK

Lets the application see if the current message on the stream head read queue is marked by a module downstream

I_CKBAND

Checks if the message of a given priority band exists on the stream head read queue

I_GETBAND

Returns the priority band of the first message on the stream head read queue

I_CANPUT

Checks if a certain band is writable

I_SETCLTIME

Enables the user to set the time the stream head will delay when a stream is closing if data exists on the write queues

I_GETCLTIME

Returns the close time delay

I_LINK

Connects two streams

I_UNLINK

Disconnects two streams

I_PLINK

Connects two streams with a persistent link below a multiplexing driver

I_PUNLINK

Disconnects two streams that have been connected with a persistent link

putmsg(2)

Creates a message from the caller supplied control and data buffers and sends the message downstream

putpmsg(2)

Does the same as putmsg(2) and enables the caller to specify a priority band for the message

getmsg(2)

Retrieves M_DATA, M_PROTO, or M_PCPROTO or high priority messages from the stream head, and places the contents into two user buffers

getpmsg(2)

Does the same as getmsg(2) and enables the caller to specify a priority band for the message

ioctl (fd, I_FLUSH, arg);

FLUSHR

Flushes read side of stream

FLUSHW

Flushes write queue

FLUSHRW

Flushes both read and write queues

ioctl (fd, I_FLUSHBAND, bandp); 

struct bandinfo {
		unsigned char    bi_pri;
		int              bi_flag;
};