makedev, major, minor - manage a device number

       For an explanation of the terms used in this section, see attributes(7).
       ┌─────────────────────────────────────────────────────────────────────────────┬───────────────┬─────────┐
       │ Interface                                                                   │ Attribute     │ Value   │
       ├─────────────────────────────────────────────────────────────────────────────┼───────────────┼─────────┤
       │ makedev(), major(), minor()                                                 │ Thread safety │ MT-Safe │
       └─────────────────────────────────────────────────────────────────────────────┴───────────────┴─────────┘

       A  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.

       Given  major  and  minor  device  IDs,  makedev()  combines these to produce a device ID, returned as the
       function result.  This device ID can be given to mknod(2), for example.

       The major()  and  minor()  functions  perform  the  converse  task:  given  a  device  ID,  they  return,
       respectively,  the major and minor components.  These macros can be useful to, for example, decompose the
       device IDs in the structure returned by stat(2).

       BSD, HP-UX, Solaris, AIX, Irix.

       These 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.

       Depending  on the version, glibc also exposes definitions for these macros from <sys/types.h> if suitable
       feature test macros are defined.  However, this behavior was deprecated in glibc 2.25,  and  since  glibc
       2.28, <sys/types.h> no longer provides these definitions.

       Standard C library (libc, -lc)

       makedev, major, minor - manage a device number

mknod(2), stat(2)

Linux man-pages 6.9.1                              2024-05-02                                         makedev(3)

       None.

#include<sys/sysmacros.h>dev_tmakedev(unsignedintmaj,unsignedintmin);unsignedintmajor(dev_tdev);unsignedintminor(dev_tdev);

       The BSDs expose the definitions for these macros via <sys/types.h>.