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-'\" t
-.\" Title: zmq_recv
-.\" Author: [see the "AUTHORS" section]
-.\" Generator: DocBook XSL Stylesheets v1.76.1 <http://docbook.sf.net/>
-.\" Date: 03/10/2014
-.\" Manual: 0MQ Manual
-.\" Source: 0MQ 4.0.1
-.\" Language: English
-.\"
-.TH "ZMQ_RECV" "3" "03/10/2014" "0MQ 4\&.0\&.1" "0MQ Manual"
-.\" -----------------------------------------------------------------
-.\" * Define some portability stuff
-.\" -----------------------------------------------------------------
-.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-.\" http://bugs.debian.org/507673
-.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
-.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-.ie \n(.g .ds Aq \(aq
-.el .ds Aq '
-.\" -----------------------------------------------------------------
-.\" * set default formatting
-.\" -----------------------------------------------------------------
-.\" disable hyphenation
-.nh
-.\" disable justification (adjust text to left margin only)
-.ad l
-.\" -----------------------------------------------------------------
-.\" * MAIN CONTENT STARTS HERE *
-.\" -----------------------------------------------------------------
-.SH "NAME"
-zmq_recv \- receive a message part from a socket
-.SH "SYNOPSIS"
-.sp
-\fBint zmq_recv (void \fR\fB\fI*socket\fR\fR\fB, void \fR\fB\fI*buf\fR\fR\fB, size_t \fR\fB\fIlen\fR\fR\fB, int \fR\fB\fIflags\fR\fR\fB);\fR
-.SH "DESCRIPTION"
-.sp
-The \fIzmq_recv()\fR function shall receive a message from the socket referenced by the \fIsocket\fR argument and store it in the buffer referenced by the \fIbuf\fR argument\&. Any bytes exceeding the length specified by the \fIlen\fR argument shall be truncated\&. If there are no messages available on the specified \fIsocket\fR the \fIzmq_recv()\fR function shall block until the request can be satisfied\&. The \fIflags\fR argument is a combination of the flags defined below:
-.PP
-\fBZMQ_DONTWAIT\fR
-.RS 4
-Specifies that the operation should be performed in non\-blocking mode\&. If there are no messages available on the specified
-\fIsocket\fR, the
-\fIzmq_recv()\fR
-function shall fail with
-\fIerrno\fR
-set to EAGAIN\&.
-.RE
-.SS "Multi\-part messages"
-.sp
-A 0MQ message is composed of 1 or more message parts\&. 0MQ ensures atomic delivery of messages: peers shall receive either all \fImessage parts\fR of a message or none at all\&. The total number of message parts is unlimited except by available memory\&.
-.sp
-An application that processes multi\-part messages must use the \fIZMQ_RCVMORE\fR \fBzmq_getsockopt\fR(3) option after calling \fIzmq_recv()\fR to determine if there are further parts to receive\&.
-.SH "RETURN VALUE"
-.sp
-The \fIzmq_recv()\fR function shall return number of bytes in the message if successful\&. Note that the value can exceed the value of the \fIlen\fR parameter in case the message was truncated\&. If not successful the function shall return \-1 and set \fIerrno\fR to one of the values defined below\&.
-.SH "ERRORS"
-.PP
-\fBEAGAIN\fR
-.RS 4
-Non\-blocking mode was requested and no messages are available at the moment\&.
-.RE
-.PP
-\fBENOTSUP\fR
-.RS 4
-The
-\fIzmq_recv()\fR
-operation is not supported by this socket type\&.
-.RE
-.PP
-\fBEFSM\fR
-.RS 4
-The
-\fIzmq_recv()\fR
-operation cannot be performed on this socket at the moment due to the socket not being in the appropriate state\&. This error may occur with socket types that switch between several states, such as ZMQ_REP\&. See the
-\fImessaging patterns\fR
-section of
-\fBzmq_socket\fR(3)
-for more information\&.
-.RE
-.PP
-\fBETERM\fR
-.RS 4
-The 0MQ
-\fIcontext\fR
-associated with the specified
-\fIsocket\fR
-was terminated\&.
-.RE
-.PP
-\fBENOTSOCK\fR
-.RS 4
-The provided
-\fIsocket\fR
-was invalid\&.
-.RE
-.PP
-\fBEINTR\fR
-.RS 4
-The operation was interrupted by delivery of a signal before a message was available\&.
-.RE
-.SH "EXAMPLE"
-.PP
-\fBReceiving a message from a socket\fR.
-.sp
-.if n \{\
-.RS 4
-.\}
-.nf
-char buf [256];
-nbytes = zmq_recv (socket, buf, 256, 0);
-assert (nbytes != \-1);
-.fi
-.if n \{\
-.RE
-.\}
-.sp
-.SH "SEE ALSO"
-.sp
-\fBzmq_send\fR(3) \fBzmq_getsockopt\fR(3) \fBzmq_socket\fR(7) \fBzmq\fR(7)
-.SH "AUTHORS"
-.sp
-This page was written by the 0MQ community\&. To make a change please read the 0MQ Contribution Policy at \m[blue]\fBhttp://www\&.zeromq\&.org/docs:contributing\fR\m[]\&.