PRINT(9E) Driver Entry Points PRINT(9E)

print - display a driver message on system console

#include <sys/types.h>
#include <sys/errno.h>
#include <sys/ddi.h>
#include <sys/sunddi.h>
int prefixprint(dev_t dev, char *str);

Architecture independent level 1 (DDI/DKI). This entry point is required for block devices.

dev
Device number.

str

Pointer to a character string describing the problem.

The print() routine is called by the kernel when it has detected an exceptional condition (such as out of space) in the device. To display the message on the console, the driver should use the cmn_err(9F) kernel function. The driver should print the message along with any driver specific information.

The print() routine should return 0 for success, or the appropriate error number. The print routine can fail if the driver implemented a non-standard print() routine that attempted to perform error logging, but was unable to complete the logging for whatever reason.

cmn_err(9F)

Writing Device Drivers

September 15, 1992 OmniOS