OPENDEV(3) | Library Functions Manual | OPENDEV(3) |
opendev
— short
form device open routine
#include
<util.h>
int
opendev
(char
*path, int oflags,
int dflags,
char **realpath);
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.
The opendev
() return value and errors are
the same as the return value and errors of
open(2).
If realpath is not
NULL
, on return it will point to internal static
storage space that will be overwritten by subsequent calls.
The opendev
() function first appeared in
OpenBSD 1.2.
December 12, 2002 | macOS 14.6 |