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Copyright 1989 AT&T
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When distributing Covered Code, include this CDDL HEADER in each file and include the License file at usr/src/OPENSOLARIS.LICENSE. If applicable, add the following below this CDDL HEADER, with the fields enclosed by brackets "[]" replaced with your own identifying information: Portions Copyright [yyyy] [name of copyright owner]
makedev, major, minor - manage a device number

#include <sys/types.h>
#include <sys/mkdev.h>

dev_t makedev(major_t maj, minor_t min);

major_t major(dev_t device);

minor_t minor(dev_t device);

The makedev() function returns a formatted device number on success and NODEV on failure. The maj argument is the major number. The min argument is the minor number. The makedev() function can be used to create a device number for input to mknod(2).

The major() function returns the major number component from device.

The minor() function returns the minor number component from device.

Upon successful completion, makedev() returns a formatted device number. Otherwise, NODEV is returned and errno is set to indicate the error.

The makedev() function will fail if: EINVAL

The major() function will fail if: EINVAL

The minor() function will fail if: EINVAL

See attributes(7) for descriptions of the following attributes:

ATTRIBUTE TYPE ATTRIBUTE VALUE

MT-Level MT-Safe

mknod (2), stat (2), attributes (7)