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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-24 04:52:22 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-24 04:52:22 +0000
commit3d08cd331c1adcf0d917392f7e527b3f00511748 (patch)
tree312f0d1e1632f48862f044b8bb87e602dcffb5f9 /man3/makedev.3
parentAdding debian version 6.7-2. (diff)
downloadmanpages-3d08cd331c1adcf0d917392f7e527b3f00511748.tar.xz
manpages-3d08cd331c1adcf0d917392f7e527b3f00511748.zip
Merging upstream version 6.8.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
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-'\" t
-.\" Copyright (c) 2008 Linux Foundation, written by Michael Kerrisk
-.\" <mtk.manpages@gmail.com>
-.\"
-.\" SPDX-License-Identifier: Linux-man-pages-copyleft
-.\"
-.TH makedev 3 2023-10-31 "Linux man-pages 6.7"
-.SH NAME
-makedev, major, minor \- manage a device number
-.SH LIBRARY
-Standard C library
-.RI ( libc ", " \-lc )
-.SH SYNOPSIS
-.nf
-.B #include <sys/sysmacros.h>
-.P
-.BI "dev_t makedev(unsigned int " maj ", unsigned int " min );
-.P
-.BI "unsigned int major(dev_t " dev );
-.BI "unsigned int minor(dev_t " dev );
-.fi
-.SH 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
-.IR dev_t .
-.P
-Given major and minor device IDs,
-.BR makedev ()
-combines these to produce a device ID, returned as the function result.
-This device ID can be given to
-.BR mknod (2),
-for example.
-.P
-The
-.BR major ()
-and
-.BR 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
-.BR stat (2).
-.SH ATTRIBUTES
-For an explanation of the terms used in this section, see
-.BR attributes (7).
-.TS
-allbox;
-lbx lb lb
-l l l.
-Interface Attribute Value
-T{
-.na
-.nh
-.BR makedev (),
-.BR major (),
-.BR minor ()
-T} Thread safety MT-Safe
-.TE
-.SH VERSIONS
-The BSDs expose the definitions for these macros via
-.IR <sys/types.h> .
-.SH STANDARDS
-None.
-.SH HISTORY
-BSD, HP-UX, Solaris, AIX, Irix.
-.\" The header location is inconsistent:
-.\" Could be sys/mkdev.h, sys/sysmacros.h, or sys/types.h.
-.P
-These interfaces are defined as macros.
-Since glibc 2.3.3,
-they have been aliases for three GNU-specific functions:
-.BR gnu_dev_makedev (),
-.BR gnu_dev_major (),
-and
-.BR gnu_dev_minor ().
-The latter names are exported, but the traditional names are more portable.
-.P
-Depending on the version,
-glibc also exposes definitions for these macros from
-.I <sys/types.h>
-if suitable feature test macros are defined.
-However, this behavior was deprecated in glibc 2.25,
-.\" glibc commit dbab6577c6684c62bd2521c1c29dc25c3cac966f
-and since glibc 2.28,
-.\" glibc commit e16deca62e16f645213dffd4ecd1153c37765f17
-.I <sys/types.h>
-no longer provides these definitions.
-.SH SEE ALSO
-.BR mknod (2),
-.BR stat (2)