|MAKEDEV(3)||Linux Programmer's Manual||MAKEDEV(3)|
NAMEmakedev, major, minor - manage a device number
#define _BSD_SOURCE /* See feature_test_macros(7) */ #include
dev_t makedev(int maj, int min);
unsigned int major(dev_t dev);
unsigned int minor(dev_t dev);
DESCRIPTIONA device ID consists of two parts: a major ID, identifying the class of the device, and a minor ID, identifying a specific instance of a device in that class. A device ID is represented using the type dev_t.
CONFORMING TOThe makedev(), major(), and minor() functions are not specified in POSIX.1, but are present on many other systems.
NOTESThese interfaces are defined as macros. Since glibc 2.3.3, they have been aliases for three GNU-specific functions: gnu_dev_makedev(), gnu_dev_major(), and gnu_dev_minor(). The latter names are exported, but the traditional names are more portable.
SEE ALSOmknod(2), stat(2)
COLOPHONThis page is part of release 3.53 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.