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% File src/library/base/man/socketSelect.Rd
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% File src/library/base/man/socketSelect.Rd
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% Part of the R package, https://www.R-project.org
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% Part of the R package, https://www.R-project.org
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% Copyright 1995-2007 R Core Team
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% Copyright 1995-2020 R Core Team
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% Distributed under GPL 2 or later
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% Distributed under GPL 2 or later
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\name{socketSelect}
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\name{socketSelect}
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\alias{socketSelect}
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\alias{socketSelect}
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\title{Wait on Socket Connections}
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\title{Wait on Socket Connections}
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\usage{
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\usage{
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socketSelect(socklist, write = FALSE, timeout = NULL)
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socketSelect(socklist, write = FALSE, timeout = NULL)
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}
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}
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\arguments{
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\arguments{
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\item{socklist}{list of open socket connections}
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\item{socklist}{list of open socket connections and server sockets.}
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\item{write}{logical. If \code{TRUE} wait for corresponding socket to
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\item{write}{logical. If \code{TRUE} wait for corresponding socket to
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become available for writing; otherwise wait for it to become
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become available for writing; otherwise wait for it to become
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available for reading or for accepting an incoming
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available for reading.}
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connection (server sockets).}
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\item{timeout}{numeric or \code{NULL}. Time in seconds to wait for a
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\item{timeout}{numeric or \code{NULL}. Time in seconds to wait for a
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socket to become available; \code{NULL} means wait
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socket to become available; \code{NULL} means wait
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indefinitely.}
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indefinitely.}
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}
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}
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\description{
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\description{
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Waits for the first of several socket connections to become available.
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Waits for the first of several socket connections and server sockets
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to become available.
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}
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}
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\value{Logical the same length as \code{socklist} indicating
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\value{Logical the same length as \code{socklist} indicating
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whether the corresponding socket connection is available for
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whether the corresponding socket connection is available for
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output or input, depending on the corresponding value of \code{write}.
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output or input, depending on the corresponding value of \code{write}.
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Server sockets can only become available for input.
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}
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}
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\details{
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\details{
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The values in \code{write} are recycled if necessary to make up a
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The values in \code{write} are recycled if necessary to make up a
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logical vector the same length as \code{socklist}. Socket connections
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logical vector the same length as \code{socklist}. Socket connections
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can appear more than once in \code{socklist}; this can be useful if
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can appear more than once in \code{socklist}; this can be useful if
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