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(mysql.info)mysql_ping

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`mysql_ping()'
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`int mysql_ping(MYSQL *mysql)'

Description
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Checks whether or not the connection to the server is working. If it
has gone down, an automatic reconnection is attempted.

This function can be used by clients that remain idle for a long while,
to check whether or not the server has closed the connection and
reconnect if necessary.

Return Values
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Zero if the server is alive. Non-zero if an error occurred.

Errors
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`CR_COMMANDS_OUT_OF_SYNC'
     Commands were executed in an improper order.

`CR_SERVER_GONE_ERROR'
     The MySQL server has gone away.

`CR_UNKNOWN_ERROR'
     An unknown error occurred.