EvmSrvMessageGet man page on DigitalUNIX

Man page or keyword search:  
man Server   12896 pages
apropos Keyword Search (all sections)
Output format
DigitalUNIX logo
[printable version]

EvmSrvStart(3)							EvmSrvStart(3)

       EvmSrvStart, EvmSrvMessageGet - Event service functions

       #include <evm/evm.h>

       EvmStatus_t EvmSrvStart(
	       char *service_name,
	       char *arg_string,
	       EvmTransport_t *transport,
	       EvmConnection_t *connection ); EvmStatus_t EvmSrvMessageGet(
	       EvmConnection_t connection,
	       EvmEvent_t *event,
	       char **msg,
	       char **errmsg,
	       EvmInt32_t *info );

       The  name  for  this service. It	 must be a service declared in the EVM
       daemon configuration file.  If this operand is not NULL, it is  written
       to the connection when the service is started.  This specifies the type
       of connection to be made to the daemon. You  usually  should  set  this
       argument	 to  NULL  for the default connection to the local daemon. For
       remote connection, set it to the address of  an	EvmTransport_t	struc‐
       ture,  transport, initialized in the following manner: char *hostname =
       "yoursys";     transport.type	 =     EvmTRANSPORT_TCPIP;	trans‐
       port.data.tcpip.portNumber  = -1; transport.data.tcpip.hostName = host‐
       name; For EvmSrvStart() this is the return operand. The calling routine
       should  pass  this  value  to EvmConnDestroy() when it is done with the

	      For EvmSrvMessageGet() this is the service connection that  will
	      be  read	for a message.	If this operand is not NULL on return,
	      it contains an EVM event returned by the service.	 If this oper‐
	      and  is  not  NULL  on  return,  it  contains a character string
	      returned by the service.	If this operand is not NULL on return,
	      it  contains  an	error message character string returned by the
	      service.	If this operand is not NULL  on	 return,  it  contains
	      numeric information returned by the service.

       The  EvmSrvStart() routine creates a service connection to the EVM dae‐
       mon, requesting that the service identified as service_name be started.
       If the service is known to the daemon, it is started as a child process
       of the daemon,  and  the	 connection  is	 transferred  to  the  service
       process.	 If  the  arg_string  is not NULL, the function then appends a
       newline character to it and writes it to the connection.

       The EvmSrvMessageGet() routine reads a single EVM service protocol mes‐
       sage  from  the service connection identified by connection and returns
       it to the caller. The message may be  a	procedural  protocol  message,
       indicating  that the service has started or terminated, or it may carry
       data. Procedural messages are handled by the API	 function.  Data  mes‐
       sages  may  be  any  one of the following: An EVM event returned to the
       caller in event A character string returned to the  caller  in  msg  An
       error character string returned to the caller in errmsg

       In each of these cases, the data will be returned to the caller only if
       the address passed to the function as the corresponding argument is not

       The  function  returns  a non-null value in at most one of these return
       arguments, and sets the others to NULL. If the  incoming	 message  does
       not  include  data (for example, if it is a protocol message indicating
       that the service is terminating) all three of the arguments are set  to

       The  message  may carry one information item, which is returned if info
       is not NULL. This value is used in  the	service	 termination  protocol
       message to indicate the service process's exit code.

       This routine is not currently supported for general use.


       A  data message was received, and is available in one of the three data
       return arguments, if a non-null pointer was supplied as the appropriate
       argument.  The service indicated that it was terminating. If the caller
       passed a non-null data argument, the service  process's	exit  code  is
       returned in the info operand.  The service connection was closed by the
       service before a service termination message was received.  This	 value
       is  returned if the caller continues to attempt the call after the ser‐
       vice has been terminated.


       EVM Support Library (libevm.so, libevm.a)


       Commands: evmget(1)

       Routines: EvmConnDestroy(3)

       Files: evmdaemon.conf(4), kevm(7)

       Event Management: EVM(5)

       Event Connection: EvmConnection(5)

       EVM Events: EvmEvent(5)


List of man pages available for DigitalUNIX

Copyright (c) for man pages and the logo by the respective OS vendor.

For those who want to learn more, the polarhome community provides shell access and support.

[legal] [privacy] [GNU] [policy] [cookies] [netiquette] [sponsors] [FAQ]
Polarhome, production since 1999.
Member of Polarhome portal.
Based on Fawad Halim's script.
Vote for polarhome
Free Shell Accounts :: the biggest list on the net