---
name: "register_blkdev"
section: "9"
platform: "linux"
package: "linux-manual-4.9"
version: "4.9.228-1"
release: "Debian 9 (Stretch)"
platforms: ["linux"]
url: "https://new.carta.tech/register_blkdev"
---

# register\_blkdev(9)

register a new block device

## 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