VeriFone MX800 series Programmer's Manual page 169

The return value of svcGetPortStatus() is a pointer to vficomErrCounts
structure which is defined in vficom.h as the following:
struct vficomErrCounts {
int frame_err;
int over_err;
int parity_err;
};
The pointer to this structure will contain the error counts for the port described by
the file descriptor passed into the function. The error counts provided are for
framing, overrun and parity errors detected for that port. The counts provided are
the total errors counted for that port since it was opened which allows the
application to track if any new errors were detected for that port since the last time
this function was called.
S
ERVICE
svcGetPortStatus()
X
M 800 S P
ERIES ROGRAMMERS
F
UNCTIONS
169
G
UIDE