| Error Message | Meaning |
|---|---|
| too many parameters | More than two parameters specified. |
| illegal port name | Unknown device name. |
| invalid pulse-width | Pulse width is 0, or no unsigned 16-bit number. |
| hardware failure | The port register cannot be read back. |
| Error Message | Meaning |
|---|---|
| port not found | The BIOS did not recognize the port. |
| Error Message | Meaning |
|---|---|
| no root privilege | Program doesn't run as root. |
| access denied | No r/w access to character device. |
| port not found | Port entry not found in /proc/parport |
| invalid base address | Format error in /proc/parport/n/hardware |