Index for Section 9

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readdisklabel(9r)
NAME
  readdisklabel - Disk: Reads a disk label from a device

SYNOPSIS
  char * readdisklabel(
	  dev_t dev,
	  int (*strategy) (struct buf *),
	  register struct disklabel *lp );

ARGUMENTS
  dev Specifies the major and minor numbers for this device. Device driver
      writers use the dev_t data type to represent a device's major and minor
      numbers. This data type is an abstraction of the internal
      representations of the major and minor numbers.  Driver writers do not
      need to know how the system internally represents the major and minor
      numbers.

  strategy
      Specifies the device driver's strategy interface.

  lp  Specifies a pointer to the disklabel structure, initialized by the
      readdisklabel interface.

DESCRIPTION
  The readdisklabel interface reads a disklabel structure for a given device,
  using the device driver's strategy interface to perform the read.

  The device driver's open interface calls readdisklabel to read the disk
  label from the disk into memory.

RETURN VALUES
  Upon successful completion, readdisklabel returns the NULL string.

  Otherwise, it returns one of the following messages:

  I/O error
      The device driver's strategy interface failed.

  no disk label
      The device driver's strategy interface returns a NULL disklabel.

  label corrupted
      The disklabel structure contains too many partitions or the checksum is
      not zero (0).





SEE ALSO
  Kernel Interfaces: setdisklabel(9r), writedisklabel(9r)


  Data Structures: disklabel(9s)

Index for Section 9

Alphabetical listing for R

Top of page