svcadm(8)을 검색하려면 섹션에서 8 을 선택하고, 맨 페이지 이름에 svcadm을 입력하고 검색을 누른다.
minor(3)
MAKEDEV(3) Linux Programmer's Manual MAKEDEV(3)
NAME
makedev, major, minor - manage a device number
SYNOPSIS
#include <sys/sysmacros.h>
dev_t makedev(unsigned int maj, unsigned int min);
unsigned int major(dev_t dev);
unsigned int minor(dev_t dev);
DESCRIPTION
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).
ATTRIBUTES
For an explanation of the terms used in this section, see attrib‐
utes(7). allbox; lbw27 lb lb l l l. Interface Attribute Value T{
makedev(), major(), minor() T} Thread safety MT-Safe
CONFORMING TO
The makedev(), major(), and minor() functions are not specified in
POSIX.1, but are present on many other systems.
NOTES
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.
The BSDs expose the definitions for these macros via <sys/types.h>.
Depending on the version, glibc also exposes definitions for these
macros from that header file if suitable feature test macros are de‐
fined. However, this behavior was deprecated in glibc 2.25, and since
glibc 2.28, <sys/types.h> no longer provides these definitions.
SEE ALSO
mknod(2), stat(2)
COLOPHON
This page is part of release 5.02 of the Linux man-pages project. A
description of the project, information about reporting bugs, and the
latest version of this page, can be found at
https://www.kernel.org/doc/man-pages/.
Linux 2018-04-30 MAKEDEV(3)