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User Communication

Developers can display the error and informational messages produced by programs running on the BlackDog to the user. This is accomplished with the standard unix syslog(3) mechanism.

In order to present messages to the user, applications should log messages to the LOCAL6 log priority, with level of INFO, DEBUG, or ERR. Messages logged to LOCAL6 priority are projected to the host using Xdialog.

Sample code to log:

• syslog(LOG_INFO | LOG_LOCAL6, "Informational message from %d", getpid());
• syslog(LOG_DEBUG | LOG_LOCAL6, "Debug message from %d", getpid());
• syslog(LOG_ERR | LOG_LOCAL6, "Error message from %d", getpid());

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