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 stor-
age 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
Mac OS X 10.8 - Generated Wed Aug 29 15:23:30 CDT 2012