Tcl API Reference -- ns_sockcheck

### ns_sockcheck

#### Overview

Check if a socket is connected

#### Syntax

ns_sockcheck fileid

#### Description

ns_sockcheck uses recv() or send() calls to check if a socket is still connected. The fileid is the read or write file id returned by ns_sockopen. This function is useful if you used the -nonblock option with ns_sockopen after calling ns_sockselect.

#### Example

An example containing ns_sockcheck is provided under ns_sockselect.

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