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+><HEAD
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+>Device and Class Specific Functions [POSIX Section 7]</TITLE
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+TITLE="Input and Output [POSIX Section 6]"
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+>Chapter 31. POSIX Standard Support</TD
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+><H1
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+><A
+NAME="POSIX-DEVICE-AND-CLASS-SPECIFIC-FUNCTIONS">Device and Class Specific Functions [POSIX Section 7]</H1
+><DIV
+CLASS="SECT2"
+><H2
+CLASS="SECT2"
+><A
+NAME="AEN13079">Functions Implemented</H2
+><TABLE
+BORDER="5"
+BGCOLOR="#E0E0F0"
+WIDTH="70%"
+><TR
+><TD
+><PRE
+CLASS="SCREEN"
+>speed_t cfgetospeed( const struct termios *termios_p );
+int cfsetospeed( struct termios *termios_p, speed_t speed );
+speed_t cfgetispeed( const struct termios *termios_p );
+int cfsetispeed( struct termios *termios_p, speed_t speed );
+int tcgetattr( int fd, struct termios *termios_p );
+int tcsetattr( int fd, int optional_actions,
+ const struct termios *termios_p );
+int tcsendbreak( int fd, int duration );
+int tcdrain( int fd );
+int tcflush( int fd, int queue_selector );
+int tcsendbreak( int fd, int action );</PRE
+></TD
+></TR
+></TABLE
+></DIV
+><DIV
+CLASS="SECT2"
+><H2
+CLASS="SECT2"
+><A
+NAME="AEN13082">Functions Omitted</H2
+><TABLE
+BORDER="5"
+BGCOLOR="#E0E0F0"
+WIDTH="70%"
+><TR
+><TD
+><PRE
+CLASS="SCREEN"
+>pid_t tcgetpgrp( int fd );
+int tcsetpgrp( int fd, pid_t pgrp );</PRE
+></TD
+></TR
+></TABLE
+></DIV
+><DIV
+CLASS="SECT2"
+><H2
+CLASS="SECT2"
+><A
+NAME="AEN13085">Notes</H2
+><P
+></P
+><UL
+><LI
+><P
+> Only the functionality relevant to basic serial device
+ control is implemented. Only very limited support for
+ canonical input is provided, and then only via the
+ “tty” devices, not the “serial”
+ devices. None of the functionality relevant to job
+ control, controlling terminals and sessions is
+ implemented.
+ </P
+></LI
+><LI
+><P
+> Only <SPAN
+CLASS="emphasis"
+><I
+CLASS="EMPHASIS"
+>MIN</I
+></SPAN
+> = 0 and
+ <SPAN
+CLASS="emphasis"
+><I
+CLASS="EMPHASIS"
+>TIME</I
+></SPAN
+> = 0 functionality is
+ provided.
+ </P
+></LI
+><LI
+><P
+> Hardware flow control is supported if the underlying
+ device driver and serial port support it.
+ </P
+></LI
+><LI
+><P
+> Support for break, framing and parity errors depends on
+ the functionality of the hardware and device driver.
+ </P
+></LI
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+>Input and Output [POSIX Section 6]</TD
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+>C Language Services [POSIX Section 8]</TD
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+>
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