add directory Minix

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+<HTML>
+<HEAD>
+<TITLE>read(2)</TITLE>
+</HEAD>
+<BODY>
+<H1>read(2)</H1>
+<HR>
+<PRE>
+
+</PRE>
+<H2>NAME</H2><PRE>
+     read - read input
+
+
+</PRE>
+<H2>SYNOPSIS</H2><PRE>
+     <STRONG>#include</STRONG> <STRONG>&lt;sys/types.h&gt;</STRONG>
+     <STRONG>#include</STRONG> <STRONG>&lt;unistd.h&gt;</STRONG>
+
+     <STRONG>ssize_t</STRONG> <STRONG>read(int</STRONG> <EM>d</EM><STRONG>,</STRONG> <STRONG>void</STRONG> <STRONG>*</STRONG><EM>buf</EM><STRONG>,</STRONG> <STRONG>size_t</STRONG> <EM>nbytes</EM><STRONG>)</STRONG>
+
+
+</PRE>
+<H2>DESCRIPTION</H2><PRE>
+     <STRONG>Read</STRONG> attempts to read <EM>nbytes</EM> of data from the object  referenced  by  the
+     descriptor <EM>d</EM> into the buffer pointed to by <EM>buf</EM>.
+
+     On objects capable of seeking, the <STRONG>read</STRONG> starts at a position given by the
+     pointer  associated  with  <EM>d</EM>  (see <STRONG><A HREF="../man2/lseek.2.html">lseek(2)</A></STRONG>).  Upon return from <STRONG>read</STRONG>, the
+     pointer is incremented by the number of bytes actually read.
+
+     Objects that are not capable of seeking  always  read  from  the  current
+     position.   The  value  of  the pointer associated with such an object is
+     undefined.
+
+     Upon successful completion, <STRONG>read</STRONG> return the number of bytes actually read
+     and  placed  in  the buffer.  The system guarantees to read the number of
+     bytes requested if the descriptor references a normal file that has  that
+     many bytes left before the end-of-file, but in no other case.
+
+     If the returned value is 0, then end-of-file has been reached.
+
+
+</PRE>
+<H2>RETURN VALUE</H2><PRE>
+     If successful, the number of bytes actually read is returned.  Otherwise,
+     a  -1  is  returned  and the global variable <STRONG>errno</STRONG> is set to indicate the
+     error.
+
+
+</PRE>
+<H2>ERRORS</H2><PRE>
+     <STRONG>Read</STRONG> will fail if one or more of the following are true:
+
+     [EBADF]        <EM>D</EM> is not a valid descriptor open for reading.
+
+     [EFAULT]       <EM>Buf</EM> points outside the allocated address space.
+
+     [EIO]          An I/O error occurred while reading from the file system.
+
+     [EINTR]        A read from a slow device was interrupted before any  data
+                    arrived by the delivery of a signal.
+
+     [EAGAIN]       The file was marked for non-blocking I/O, and no data were
+                    ready to be read.
+
+
+
+
+</PRE>
+<H2>SEE ALSO</H2><PRE>
+     <STRONG><A HREF="../man2/dup.2.html">dup(2)</A></STRONG>, <STRONG><A HREF="../man2/fcntl.2.html">fcntl(2)</A></STRONG>, <STRONG><A HREF="../man2/open.2.html">open(2)</A></STRONG>, <STRONG><A HREF="../man2/pipe.2.html">pipe(2)</A></STRONG>, <STRONG><A HREF="../man2/write.2.html">write(2)</A></STRONG>.
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+</PRE>
+</BODY>
+</HTML>