makedev - get formatted device number (extension)

Syntax	#include <sys/types.h> #include <sys/mkdev.h> dev_t makedev(major_t maj, minor_t min);
Description	makedev() returns a formatted device number. maj is the major number of the device, andmin is its minor number. makedev() can be used to generate a device number for mknod().
Return val.	Formatted device number
		if successful.
	NODEV	if an error occurs. errno is set to indicate the error.
Errors	makedev() will fail if:
	EINVAL	One or both of the maj and min arguments is too large, or the device number created from maj and min is NODEV.
See also	major(), minor(), mknod(), stat().