37 lines
833 B
Groff
37 lines
833 B
Groff
.TH LISTEN 2
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.SH NAME
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listen \- listens for incoming connections on a socket
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.SH SYNOPSIS
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.ft B
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#include <sys/socket.h>
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.in +5
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.ti -5
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int listen(int \fIsd\fP, int \fIbacklog\fP);
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.br
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.ft P
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.SH DESCRIPTION
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listen() puts socket \fIsd\fP into the listening state.
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\fIbacklog\fP number of incoming connections may be
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queued before new incoming connections are refused.
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This function is usually called after bind(2) and before
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accept(2).
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.SH RETURN VALUES
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On success, this function returns 0. On error, -1 is returned and
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\fIerrno\fP is set.
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.SH ERRORS
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.TP 15
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[EINVAL]
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The socket is invalid or bind(2) has not been called yet
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for the socket.
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.TP 15
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[EOPNOTSUPP]
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The socket type (example SOCK_DGRAM) does not support listening.
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.TP 15
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[ENOSYS]
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The socket does not support listening.
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.SH SEE ALSO
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.BR accept(2),
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.BR bind(2),
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.BR socket(2)
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