MAKEDEV(3) BSD Library Functions Manual MAKEDEV(3)NAME
makedev, major, minor -- device number conversion
makedev(int major, int minor);
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.
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)NAME
makedev, major, minor - manage a device number
dev_t makedev(int maj, int min);
int major(dev_t dev);
int minor(dev_t dev);
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).
The makedev() major() and minor() functions are not specified in POSIX.1, but are present on many other systems.
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 http://www.kernel.org/doc/man-pages/.
Linux 2008-12-01 MAKEDEV(3)
to the moderators of this site...
i posted a question several weeks ago about a egep -e if you look through my posts you will see that my question was fully plausible as a reasonable post that could have been answered even it was to say that I should search the man pages myself and find the... (4 Replies)
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)
Hi, I develop code using a few different solaris platforms. I've recently moved to SunOS 5.10 using the following c compiler.
Sun C++ 5.9 SunOS_sparc Patch 124863-01 2007/07/25
On this box and these versions I get hundreds of warnings that do not appear of the earlier solaris/c versions.
... (4 Replies)
Good evening ...
does anyone of you know how to change major/minor numbers of disk devices ?
I had to migrate from raid1 to raid5 and this messed up my ASM cluster - I know which devices should have which IDs to match the content - but I have no idea how to change it.
Any help would be... (2 Replies)
I have line like this :
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)
Came in this morning to a downed E450 - thought it had been a power disaster. But wasn't! Machine had apparently shut itself down.
All three power supplies are double-green, and case interlock switch is closed...
As this is the first time we've had such a catastrophic(?)... (5 Replies)
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)
I have managed on numerous machine to set up sftp not too require a password - i finally have one that does not work and Im at a loss - looked around checked permissions etc
The 2 machines Ill call then source and target I need to sftp from source to target (previously the target has... (3 Replies)
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)
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)