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lp (7)
  • lp (1) ( Solaris man: Команды и прикладные программы пользовательского уровня )
  • lp (1) ( FreeBSD man: Команды и прикладные программы пользовательского уровня )
  • lp (1) ( Linux man: Команды и прикладные программы пользовательского уровня )
  • lp (1) ( POSIX man: Команды и прикладные программы пользовательского уровня )
  • lp (4) ( FreeBSD man: Специальные файлы /dev/* )
  • lp (4) ( Русские man: Специальные файлы /dev/* )
  • lp (4) ( Linux man: Специальные файлы /dev/* )
  • >> 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_GETERR ioctl() 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_TESTIO ioctl(2) call. The application can check transfer readiness without attempting another transfer using the BPPIOC_TESTIO ioctl().

     

    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_TESTIO ioctl() 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:

    ATTRIBUTE TYPEATTRIBUTE VALUE

    Architecturex86

     

    SEE ALSO

    sysbus(4), attributes(5), streamio(7I)  

    NOTES

    A read operation on a bi-directional parallel port is not supported.


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    IOCTLS
    Error Pins Structure
    ERRORS
    FILES
    ATTRIBUTES
    SEE ALSO
    NOTES


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