dadHost

f77:  Call dadHost( Name, Type, Port, Dataflow, OpenFlags) 
      integer Port, OpenFlags
      character *(*)Name
      character *(*)Type
      character *(*)Dataflow
  or
C:    int dadHost( char *Name, char *Type, int Port, char *Dataflow, 
		       int OpenFlags);      

• The Name either contains the name of the host where the server is expected to be running or the name of a local UNIX socket filename. If a pipe or file is the specified connection this name refers to the unix file name.
• The Type is either:
  • 'INET' for a internet socket connection or
  • 'UNIX' for a local unix socket connection or
  • 'RFIL' for reading from a dad file or
  • 'WFIL' for writing to a dad file,
  • 'RPIP' for reading from a dad pipe or
  • 'WPIP' for writing to a dad pipe.
  • 'RMEM' for reading from a dad shared memory pipe or
  • 'WMEM' for writing to a dad shared memory pipe.
• The Port contains the port number of the external host where the server is listening for clients or 0 in the case of a local connection.
• The Dataflow is the name of the dataflow that is expected to be served by the server.
• The Openflags specify the operation mode for the database access. You use a sum of
  • CAC_READ for reading a information from the server
  • CAC_WRITE for writing information to the server
  • CAC_UPDATE for the updating scheme
  • CAC_BOOK for booking new information (messages) on the server
  • CAC_GENTABLES if the metatable information on the server shall be used to generate the Adamo tables in the library while connecting to the server.
  • CAC_KEYTABLE for access to the keytable. Here the keytable may be read but only fields besides ID, cName, iTimeStart, iTimeEnd and LocalId may be changed by the client on the current record. Changes to the current keytable entry can only be made if the keytable contains the above mentioned update fields are part of the table. See examples on keytable manipulation.
  • CAC_CHECKSUM Dad can now write evcat format on dad files. The flag CAC_CHECKSUM does enable this format which packs records into a frame of |framelength|buffer| checksum|.
  • CAC_NOSYNC No Time synchronization is done even if the system time of client and host differ.
  • CAC_KEEPEXEC Keep a file handle of the server connection also in exec'ed processes.
  • CAC_MULTI Open a multi record type file/pipe to be accessed through the functions dadMRead, dadMWrite and dadRewind only.
  • CAC_COMPRESS read/write a file in compressed mode using zlib. The compression factor can be adjusted via dadComprLevel. This option is only supported for file I/O.