Added functions from POSIX standard.

doc/posix1003.1/ch06.t

@@ -7,30 +7,125 @@
 @c
 
 @chapter Input and Output Primitives
+
 @section Pipes
+
 @subsection Create an Inter-Process Channel
+
+@example
+pipe()
+@end example
+
 @section File Descriptor Manipulation
+
 @subsection Duplicate an Open File Descriptor
+
+@example
+dup()
+dup2()
+@end example
+
 @section File Descriptor Deassignment
+
 @subsection Close a File
+
+@example
+close()
+@end example
+
 @section Input and Output
+
 @subsection Read from a File
+
+@example
+read()
+@end example
+
 @subsection Write to a File
+
+@example
+write()
+@end example
+
 @section Control Operations on Files
+
 @subsection Data Definitions for File Control Operations
+
 @subsection File Control
+
+@example
+fcntl()
+@end example
+
 @subsection Reposition Read/Write File Offset
+
+@example
+lseek()
+@end example
+
 @section File Synchronization
+
 @subsection Synchronize the State of a File
+
+@example
+fsync()
+@end example
+
 @subsection Synchronize the Data of a File
+
+@example
+fdatasync()
+@end example
+
 @section Asynchronous Input and Output
+
 @subsection Data Definitions for Asynchronous Input and Output
+
 @subsection Asynchronous Read
+
+@example
+aio_read()
+@end example
+
 @subsection Asynchronous Write
+
+@example
+aio_write()
+@end example
+
 @subsection List Directed I/O
+
+@example
+aio_listio()
+@end example
+
 @subsection Retrieve Error Status of Asynchronous I/O Operation
+
+@example
+aio_error()
+@end example
+
 @subsection Retrieve Return Status of Asynchronous I/O Operation
+
+@example
+aio_return()
+@end example
+
 @subsection Cancel Asynchronous I/O Request
+
+@example
+aio_cancel()
+@end example
+
 @subsection Wait for Asynchronous I/O Request
+
+@example
+aio_suspend()
+@end example
+
 @subsection Asynchronous File Synchronization
 
+@example
+aio_fsync()
+@end example
+