dpm_ping - check if Disk Pool Manager is alive and return its version
int dpm_ping (char *server, char *info)
dpm_ping checks if the Disk Pool Manager is alive and returns its
server specifies the Disk Pool Manager hostname. If NULL, the DPM_HOST
environment variable is used.
info points at a buffer to receive the information (currently the
version number). The buffer must be at least 256 characters
This routine returns 0 if the operation was successful or -1 if the
operation failed. In the latter case, serrno is set appropriately.
EFAULT info is a NULL pointer.
SENOSHOST Host unknown.
SENOSSERV Service unknown.
SECOMERR Communication error.
EDPMNACT Disk Pool Manager is not running or is being shutdown.