>> lp (7) ( Solaris man: Макропакеты и соглашения )
NAME
lp - driver for parallel port
SYNOPSIS
include <sys/bpp_io.h>
fd = open("/dev/lpn", flags);
DESCRIPTION
The lp driver provides the interface to the parallel ports used by printers for x86 based systems. The lp driver is implemented as a STREAMS device.
IOCTLS
BPPIOC_TESTIO
Test transfer readiness. This command checks to see if a read
or write transfer would succeed based on pin status. If a transfer would succeed, 0 is returned. If a transfer would fail, -1 is returned, and errno is set to EIO. The error status can be retrieved using the BPPIOC_GETERRioctl()
call.
BPPIOC_GETERR
Get last error status. The argument is a pointer to a struct bpp_error_status. See below
for a description of the elements of this structure. This structure indicates the status of all the appropriate status bits at the time of the most recent error condition during a read(2) or write(2) call, or the status of the bits at the most recent BPPIOC_TESTIOioctl(2) call. The application can check transfer readiness without attempting another transfer using the BPPIOC_TESTIOioctl().
Error Pins Structure
This structure and symbols are defined in the include file <sys/bpp_io.h>:
struct bpp_error_status {
char timeout_occurred; /* Not use */
char bus_error; /* Not use */
uchar_t pin_status; /* Status of pins which could cause an error */
};
/* Values for pin_status field */
#define BPP_ERR_ERR 0x01 /* Error pin active */
#define BPP_SLCT_ERR 0x02 /* Select pin active */
#define BPP_PE_ERR 0x04 /* Paper empty pin active */
Note: Other pin statuses are defined in <sys/bpp_io.h>, but BPP_ERR_ERR,BPP_SLCT_ERR and BPP_PE_ERR are the only ones valid for the x86 lp driver.
ERRORS
EIO
A BPPIOC_TESTIOioctl() call
is attempted while a condition exists that would prevent a transfer (such as a peripheral error).
EINVAL
An ioctl() is attempted with an invalid value in the command argument.
FILES
/platform/i86pc/kernel/drv/lp.conf
configuration file for lp driver
ATTRIBUTES
See attributes(5) for descriptions of the following
attributes:
