opendev(3) [osx man page]

OPENDEV(3)						   BSD Library Functions Manual 						OPENDEV(3)

NAME

     opendev -- short form device open routine

SYNOPSIS

     #include <util.h>

     int
     opendev(char *path, int oflags, int dflags, char **realpath);

DESCRIPTION

     The opendev() function opens a device using the ``short form'' name.  This is typically ``disk0s3'', for instance, which will be expanded to
     /dev/rdisk0s3 on most architectures.

     Device name lookup is done by first checking path for a ``/'' and if one is found attempting to open that file.  Otherwise /dev is searched
     for a matching device.

     The oflags are the same as the flags passed to open(2).

     The dflags are specified by OR'ing the following values:

	   OPENDEV_PART    attempt to open the raw partition during expansion
	   OPENDEV_BLCK    open the block device (default is character device)

     The ``raw'' partition is defined as the partition which provides access to the entire disk, regardless of the disk's partition map.

     If realpath is not NULL, it is modified to point at the fully expanded device name.

RETURN VALUES

     The opendev() return value and errors are the same as the return value and errors of open(2).

WARNINGS

     If realpath is not NULL, on return it will point to internal static storage space that will be overwritten by subsequent calls.

SEE ALSO

     open(2)

HISTORY

     The opendev() function first appeared in OpenBSD 1.2.

BSD
								 December 12, 2002							       BSD

KPARTX(8)						   Linux Administrator's Manual 						 KPARTX(8)

NAME

       kpartx - Create device maps from partition tables

SYNOPSIS

       kpartx [-a | -d | -l] [-v] wholedisk

DESCRIPTION

       This  tool,  derived  from  util-linux'	partx,	reads partition tables on specified device and create device maps over partitions segments
       detected. It is called from hotplug upon device maps creation and deletion.

OPTIONS

       -a     Add partition mappings

       -r     Read-only partition mappings

       -d     Delete partition mappings

       -u     Update partition mappings

       -l     List partition mappings that would be added -a

       -p     set device name-partition number delimiter

       -f     force creation of mappings; overrides 'no_partitions' feature

       -g     force GUID partition table (GPT)

       -v     Operate verbosely

       -s     Sync mode. Don't return until the partitions are created

EXAMPLE

       To mount all the partitions in a raw disk image:

	      kpartx -av disk.img

       This will output lines such as:

	      loop3p1 : 0 20964762 /dev/loop3 63

       The loop3p1 is the name of a device file under /dev/mapper which you can use to access the partition, for example to fsck it:

	      fsck /dev/mapper/loop3p1

       When you're done, you need to remove the devices:

	      kpartx -d disk.img

SEE ALSO

       multipath(8) multipathd(8) hotplug(8)

AUTHORS

       This man page was assembled By Patrick Caulfield for the Debian project. From documentation provided by	the  multipath	author	Christophe
       Varoqui, <christophe.varoqui@opensvc.com> and others.

								     July 2006								 KPARTX(8)