Opens the services database file.
    Format
      #include  <netdb.h>
      void setservent  (int stay_open);

1  –  Argument

 stay_open
    Specifies a value used to indicate when to close the services
    database file (TCPIP$ETC:SERVICES.DAT):
    o  A value of 0 closes the services database file after each call
       to the setservent() function.
    o  A nonzero value keeps the services database file open after
       each call to setservent().

2  –  Description

    This function opens the services database file and resets the
    file marker to the beginning of the file.
    Passing a nonzero stay_open argument keeps the connection
    open until you call the endservent() function or the exit()
    function.
    Related Functions
    See also endservent(), exit(),  and getservent().