REGISTER_BLKDEV(9) Block Devices REGISTER_BLKDEV(9)NAME
register_blkdev - register a new block device
SYNOPSIS
int register_blkdev(unsigned int major, const char * name);
ARGUMENTS
major
the requested major device number [1..255]. If major=0, try to allocate any unused major number.
name
the name of the new block device as a zero terminated string
DESCRIPTION
The name must be unique within the system.
The return value depends on the major input parameter. - if a major device number was requested in range [1..255] then the function returns
zero on success, or a negative error code - if any unused major number was requested with major=0 parameter then the return value is the
allocated major number in range [1..255] or a negative error code otherwise
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 REGISTER_BLKDEV(9)
Check Out this Related Man Page
makedev(3C) Standard C Library Functions makedev(3C)NAME
makedev, major, minor - manage a device number
SYNOPSIS
#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);
DESCRIPTION
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.
RETURN VALUES
Upon successful completion, makedev() returns a formatted device number. Otherwise, NODEV is returned and errno is set to indicate the
error.
ERRORS
The makedev() function will fail if:
EINVAL One or both of the arguments maj and min is too large, or the device number created from maj and min is NODEV.
The major() function will fail if:
EINVAL The device argument is NODEV, or the major number component of device is too large.
The minor() function will fail if:
EINVAL The device argument is NODEV.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|MT-Level |MT-Safe |
+-----------------------------+-----------------------------+
SEE ALSO mknod(2), stat(2), attributes(5)SunOS 5.11 29 Dec 1996 makedev(3C)
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