stropts.h(3HEAD) Headers stropts.h(3HEAD)NAME
stropts.h, stropts - STREAMS interface (STREAMS)
SYNOPSIS
#include <stropts.h>
DESCRIPTION
The <stropts.h> header defines the bandinfo structure, which includes
the following members:
unsigned char bi_pri /* priority band */
int bi_flag /* flushing type */
The <stropts.h> header defines the strpeek structure that includes the
following members:
struct strbuf ctlbuf /* control portion of the message */
struct strbuf databuf /* data portion of the message */
t_uscalar_t flags /* RS_HIPRI or 0 */
The <stropts.h> header defines the strbuf structure that includes the
following members:
int maxlen /* maximum buffer length */
int len /* length of data */
char *buf /* pointer to buffer */
The <stropts.h> header defines the strfdinsert structure that includes
the following members:
struct strbuf ctlbuf /* control portion of the message */
struct strbuf databuf /* data portion of the message */
t_uscalar_t flags /* RS_HIPRI or 0 */
int fildes /* file descriptor of the other stream */
int offset /* relative location of the stored value */
The <stropts.h> header defines the strioctl structure that includes the
following members:
int ic_cmd /* ioctl() command */
int ic_timout /* timeout for response */
int ic_len /* length of data */
char *ic_dp /* pointer to buffer */
The <stropts.h> header defines the strrecvfd structure that includes
the following members:
int fda /* received file descriptor */
uid_t uid /* UID of sender */
gid_t gid /* GID of sender */
The uid_t and gid_t types are defined through typedef as described in
<sys/types.h>. See types.h(3HEAD).
The <stropts.h> header defines the t_scalar_t and t_uscalar_t types,
respectively, as signed and unsigned opaque types of equal length of at
least 32 bits.
The <stropts.h> header defines the str_list structure that includes the
following members:
int sl_nmods /* number of STREAMS module names */
struct str_mlist *sl_modlist /* STREAMS module names */
The <stropts.h> header defines the str_mlist structure that includes
the following member:
char l_name[FMNAMESZ+1] a STREAMS module name
The following macros are defined for use as the request argument to
ioctl():
I_PUSH Push a STREAMS module.
I_POP Pop a STREAMS module.
I_LOOK Get the top module name.
I_FLUSH Flush a stream.
I_FLUSHBAND Flush one band of a stream.
I_SETSIG Ask for notification signals.
I_GETSIG Retrieve current notification signals.
I_FIND Look for a STREAMS module.
I_PEEK Peek at the top message on a stream.
I_SRDOPT Set the read mode.
I_GRDOPT Get the read mode.
I_NREAD Size the top message.
I_FDINSERT Send implementation-defined information about another
stream.
I_STR Send a STREAMS ioctl().
I_SWROPT Set the write mode.
I_GWROPT Get the write mode.
I_SENDFD Pass a file descriptor through a STREAMS pipe.
I_RECVFD Get a file descriptor sent via I_SENDFD.
I_LIST Get all the module names on a stream.
I_ATMARK Is the top message ``marked''?
I_CKBAND See if any messages exist in a band.
I_GETBAND Get the band of the top message on a stream.
I_CANPUT Is a band writable?
I_SETCLTIME Set close time delay.
I_GETCLTIME Get close time delay.
I_LINK Connect two streams.
I_UNLINK Disconnect two streams.
I_PLINK Persistently connect two streams.
I_PUNLINK Dismantle a persistent STREAMS link.
The following macro is defined for use with I_LOOK:
FMNAMESZ minimum size in bytes of the buffer referred to by the arg
argument
The following macros are defined for use with I_FLUSH:
FLUSHR flush read queues
FLUSHW flush write queues
FLUSHRW flush read and write queues
The following macros are defined for use with I_SETSIG:
S_RDNORM A normal (priority band set to 0) message has arrived at
the head of a stream head read queue.
S_RDBAND A message with a non-zero priority band has arrived at the
head of a stream head read queue.
S_INPUT A message, other than a high-priority message, has arrived
at the head of a stream head read queue.
S_HIPRI A high-priority message is present on a stream head read
queue.
S_OUTPUT The write queue for normal data (priority band 0) just
below the stream head is no longer full. This notifies the
process that there is room on the queue for sending (or
writing) normal data downstream.
S_WRNORM Equivalent to S_OUTPUT.
S_WRBAND The write queue for a non-zero priority band just below
the stream head is no longer full.
S_MSG A STREAMS signal message that contains the SIGPOLL signal
reaches the front of the stream head read queue.
S_ERROR Notification of an error condition reaches the stream
head.
S_HANGUP Notification of a hangup reaches the stream head.
S_BANDURG When used in conjunction with S_RDBAND, SIGURG is gener‐
ated instead of SIGPOLL when a priority message reaches
the front of the stream head read queue.
The following macro is defined for use with I_PEEK:
RS_HIPRI Only look for high-priority messages.
The following macros are defined for use with I_SRDOPT:
RNORM Byte-stream mode, the default.
RMSGD Message-discard mode.
RMSGN Message-non-discard mode.
RPROTNORM Fail read() with [EBADMSG] if a message containing a con‐
trol part is at the front of the stream head read queue.
RPROTDAT Deliver the control part of a message as data when a
process issues a read()
RPROTDIS Discard the control part of a message, delivering any data
part, when a process issues a read()
The following macro is defined for use with I_SWOPT:
SNDZERO Send a zero-length message downstream when a write() of 0
bytes occurs.
The following macros are defined for use with I_ATMARK:
ANYMARK Check if the message is marked.
LASTMARK Check if the message is the last one marked on the queue.
The following macro is defined for use with I_UNLINK:
MUXID_ALL Unlink all stream linked to the stream associated with
fildes.
The following macros are defined for getmsg(), getpmsg(), putmsg(), and
putpmsg():
MSG_ANY Receive any message.
MSG_BAND Receive message from specified band.
MSG_HIPRI Send/receive high-priority message.
MORECTL More control information is left in message.
MOREDATA More data is left in message.
The <stropts.h> header can make visible all of the symbols from
<unistd.h>.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
┌─────────────────────────────┬─────────────────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├─────────────────────────────┼─────────────────────────────┤
│Interface Stability │Committed │
├─────────────────────────────┼─────────────────────────────┤
│Standard │See standards(5). │
└─────────────────────────────┴─────────────────────────────┘
SEE ALSOclose(2), fcntl(2), getmsg(2), ioctl(2), open(2), pipe(2), poll(2),
putmsg(2), read(2), write(2), signal(3C), types.h(3HEAD),
unistd.h(3HEAD), attributes(5), standards(5)SunOS 5.11 10 Sep 2004 stropts.h(3HEAD)
