Added man pages.

man/man2/write.2

@@ -0,0 +1,97 @@
+.\" Copyright (c) 1980 Regents of the University of California.
+.\" All rights reserved.  The Berkeley software License Agreement
+.\" specifies the terms and conditions for redistribution.
+.\"
+.\"	@(#)write.2	6.5 (Berkeley) 5/14/86
+.\"
+.TH WRITE 2 "May 14, 1986"
+.UC 4
+.SH NAME
+write \- write output
+.SH SYNOPSIS
+.nf
+.ft B
+#include <sys/types.h>
+#include <unistd.h>
+
+ssize_t write(int \fId\fP, const void *\fIbuf\fP, size_t \fInbytes\fP)
+.fi
+.SH DESCRIPTION
+.B Write
+attempts to write
+.I nbytes
+of data to the object referenced by the descriptor
+.I d
+from the buffer pointed to by
+.IR buf .
+.PP
+On objects capable of seeking, the \fBwrite\fP starts at a position
+given by the pointer associated with
+.IR d ,
+see
+.BR lseek (2).
+Upon return from
+.BR write ,
+the pointer is incremented by the number of bytes actually written.
+.PP
+Objects that are not capable of seeking always write from the current
+position.  The value of the pointer associated with such an object
+is undefined.
+.PP
+When using non-blocking I/O on objects such as TCP/IP channels that are
+subject to flow control,
+.B write
+may write fewer bytes than requested;
+the return value must be noted,
+and the remainder of the operation should be retried when possible.
+.SH "RETURN VALUE
+Upon successful completion the number of bytes actually written
+is returned.  Otherwise a \-1 is returned and the global variable
+.B errno
+is set to indicate the error.
+.SH ERRORS
+.B Write
+will fail and the file pointer will remain unchanged if one or more
+of the following are true:
+.TP 15
+[EBADF]
+\fID\fP is not a valid descriptor open for writing.
+.TP 15
+[EPIPE]
+An attempt is made to write to a pipe that is not open
+for reading by any process.
+.TP 15
+[EPIPE]
+An attempt is made to write to a TCP channel
+that is not connected to a peer socket.
+.TP 15
+[EFBIG]
+An attempt was made to write a file that exceeds the process's
+file size limit or the maximum file size.
+.TP 15
+[EFAULT]
+Part of the data to be written to the file
+points outside the process's allocated address space.
+.TP 15
+[ENOSPC]
+There is no free space remaining on the file system
+containing the file.
+.ig
+.TP 15
+[EDQUOT]
+The user's quota of disk blocks on the file system
+containing the file has been exhausted.
+..
+.TP 15
+[EIO]
+An I/O error occurred while reading from or writing to the file system.
+.TP 15
+[EAGAIN]
+The file was marked for non-blocking I/O,
+and no data could be written immediately.
+.SH "SEE ALSO"
+.BR fcntl (2),
+.BR lseek (2),
+.BR open (2),
+.BR pipe (2),
+.BR read (2).