Linux and UNIX Man Pages

Linux & Unix Commands - Search Man Pages

major(3) [netbsd man page]

MAKEDEV(3)						   BSD Library Functions Manual 						MAKEDEV(3)

makedev, major, minor -- device number conversion SYNOPSIS
#include <sys/types.h> dev_t makedev(int major, int minor); int major(dev_t dev); int minor(dev_t dev); DESCRIPTION
The makedev() macro allows a unique device number to be generated based on its major and minor number. The major() and minor() macros can be used to obtain the original numbers from the device number dev. All block and character devices are uniquely identified by a pair of major and minor numbers. The major number refers to a certain device class (e.g. disks, TTYs) while the minor number identifies an instance within the device class. RETURN VALUES
The major() macro returns a device major number that has a value between 0 and 255. The minor() macro returns a device minor number whose value can span the complete range of an int. SEE ALSO
mknod(2), devname(3), MAKEDEV(8) BSD
April 1, 2011 BSD

Check Out this Related Man Page

MAKEDEV(3)						     Linux Programmer's Manual							MAKEDEV(3)

makedev, major, minor - manage a device number SYNOPSIS
#define _BSD_SOURCE #include <sys/types.h> dev_t makedev(int maj, int min); int major(dev_t dev); 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). 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(3), gnu_dev_major(3), and gnu_dev_minor(3). The latter names are exported, but the traditional names are more portable. SEE ALSO
mknod(2), stat(2) COLOPHON
This page is part of release 3.25 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at Linux 2008-12-01 MAKEDEV(3)
Man Page

14 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Major differences between AIX, Solaris, HP-UX, Linux

Hi All, I want to know the OS level differences between AIX, Solaris, HP-UX, Linux Apart from the vendor, H/w and command differences, any other significant points. regards, guru Charan (9 Replies)
Discussion started by: gurukottur
9 Replies

2. Solaris

Major system issue!!! HELP

Last week our server went down. I narrowed it down the the hard drive. I received a new drive but I REALLY need some info off the old drive. I want to get the old drive up long enough to do a dd copy. Here's what I tried.............. After trying to freeze the old drive (wasn't spinning up) to... (4 Replies)
Discussion started by: shorty
4 Replies

3. UNIX for Dummies Questions & Answers

Major OS errors/Bash errors help!!!!

Hi all, dummy here.... I have major errors on entering the shell. On login I get: -bash: dircolors: command not found -bash: tr: command not found -bash: fgrep: command not found -bash: grep: command not found -bash: grep: command not found -bash: id: command not found -bash: [: =: unary... (12 Replies)
Discussion started by: wcmmlynn
12 Replies

4. Shell Programming and Scripting

sort major.minor.release_build_x

would like to order this input based on major.minor.release AND build number Label abc_def_0.0.3_build_999 2008/08/01 'Created by me.' Label abc_def_0.0.9_build_1000 2008/08/01 'Created by me.' Label abc_def_9.0.9_build_10001 2008/08/01 'Created by me.' Label abc_def_10.9.100_build_2... (4 Replies)
Discussion started by: gurpal2000
4 Replies

5. AIX

Difference between Major and Minor in AIX

Difference between Major and Minor in AIX (5 Replies)
Discussion started by: AIXlearner
5 Replies

6. Programming

which head file for major and minor function?

#include <sys/types.h> #include <sys/stat.h> #include <sys/termios.h> #include <stdio.h> #include <stdlib.h> #include <stddef.h> #include <string.h> #include <unistd.h> #include <signal.h> #include <sys/mkdev.h> int main(int argc, char *argv) { int i; struct stat buf; ... (4 Replies)
Discussion started by: konvalo
4 Replies

7. Shell Programming and Scripting

major help needed phone dir script need advancing

dam i stuck i am trying to write a script that is a basic phone book so i can enter a name or number or both into the scripts and by using positional paramiters the script will check if the name has a number in it and warn that numbers are not allowed with names, if i enter a number then... (6 Replies)
Discussion started by: zappedback
6 Replies

8. Shell Programming and Scripting

How to filter out major and minor?

Hi, I have line like this : proj_name/module/trunk/module_1_0 where the first "1" refers to major version and second "0" refers to minor version. any AWK or command like that so that I can filter out the major and minor ? like major= command | input line minor= command |... (4 Replies)
Discussion started by: bhaskar_m
4 Replies

9. UNIX for Dummies Questions & Answers

Which kind of UNIX to major investment banks use?

Hi, I would like to know what kind of UNIX major investment banks tend to use? I want to try to get a job with one of these places. By major, I mean big companies like Citigroup, JP Morgan Chase, Morgan Stanley, etc. Thanks. (5 Replies)
Discussion started by: rubrubber
5 Replies

10. Solaris

Boot failure - Warnings for /etc/major_to_minor and /etc/driver_aliases

Got a problem booting my Solaris 2.7 machine. Get pages and pages of error messages complaining about invalid line 2 in /etc/major_to_minor and then a few pages complaining about errors in /etc/driver_aliases. Then it aborts with an MMU error and kicks back to OK> prompt. Managed to boot... (10 Replies)
Discussion started by: psychocandy
10 Replies

11. Solaris

Major and Minor number of Virtual File System

Hi friends, Please let me know if there is any way to find out Major and Minor numbers of virtual file system like below: /devices 0K 0K 0K 0% /devices ctfs 0K 0K 0K 0% /system/contract proc 0K 0K ... (8 Replies)
Discussion started by: nitj
8 Replies

12. Shell Programming and Scripting

Filtering my major and minor values

I want to remove all rows with a minor repeating count less than 30% compared to the major repeating count from my table. The values of a col(starting col 2) can assume is A,T,G,C and N. Each row has at least 2 values and at most 4 repeating values(out of ATGC). N is considered a missing value... (12 Replies)
Discussion started by: newbie83
12 Replies

13. What is on Your Mind?

Major achievement ... applause!

Dear fellow *nixers, please join me congratulating Corona688 for reaching the lonesome, lorn landmark of 4500 thanks! What an achievement in the gruelling ordeal of servicing these fora. Incredible. All the best RĂ¼diger (9 Replies)
Discussion started by: RudiC
9 Replies

14. What is on Your Mind?

Major Changes in New UserCP (v0.63) Prototype

Regarding the latest version of the UserCP prototype (version 0.63) I have made a lot of major changes, including Added a "Posts Timeline" table for the recent posts, complimenting the non-table version earlier, which has been moved off the main menu (link at the bottom of the table). Added a... (4 Replies)
Discussion started by: Neo
4 Replies