This value is checked against the events field in the log record. If it is a valid event for the log, the other LLog structure variables are written to the log. The what parameter variable is a string that explains what actions the subroutines have accomplished. The rest of the variables should be in the form of a printf statement, a string format and the variables to fill the various variable placeholders in the string format. The what variable often contains the reason for the failure.
Parameters lp Contains a pointer to a structure that describes a log file.
The lp parameter is used to describe things entered into the log, the file name, and headers. The first argument needs to be a character string that describes what failed. The following arguments are expected in a format similar to the printf operation, which is a string format with the variables needed to fill the format variable places. The isodetailor subroutine. List of Network Manager Programming References .