SPARSE_KEYMAP_FREE(9) Input Subsystem SPARSE_KEYMAP_FREE(9)NAME
sparse_keymap_free - free memory allocated for sparse keymap
void sparse_keymap_free(struct input_dev * dev);
Input device using sparse keymap
This function is used to free memory allocated by sparse keymap in an input device that was set up by sparse_keymap_setup.
It is safe to cal this function while input device is still registered (however the drivers should care not to try to use freed keymap and
thus have to shut off interrups/polling before freeing the keymap).
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 SPARSE_KEYMAP_FREE(9)
Check Out this Related Man Page
INSTALL-KEYMAP(8) System Manager's Manual INSTALL-KEYMAP(8)NAME
install-keymap -- expand a given keymap and install it as boot-time keymap
install-keymap [keymap-name | NONE | KERNEL]
install-keymap usually takes a keymap-name as argument. The file is passed to loadkeys for loading, so that valid values for this argument
are the same than that of arguments to loadkeys. install-keymap expands include-like statements in that file, and puts the result in
/etc/console/boottime.kmap.gz, which will be loaded into the kernel at boot-time.
One may also specify KERNEL instead of a keymap name, causing /etc/console/boottime.kmap.gz to be removed, making sure that no custom
keymap will replace the kernel's builtin keymap at next reboot.
An argument of NONE tells the command to do nothing. It can be used by caller scripts to avoid handling this special case and needlessly
The purpose of this processing is to solve an annoying problem, of 2 apparently conflicting issues. The first one is an important goal of
keymap management in Debian, namely ensuring that whenever the user or admin is expected to use the keyboard, the keymap selected as boot-
time keymap is in use; this means the keymap has to be loaded before a shell is ever proposed, which means very early in the booting
process, and especially before all local filesystems are mounted (/etc/rcS.d/S10checkroot.sh can spawn sulogin).
The second issue is that for flexibility we allow that /usr or /usr/share may live on their own partition(s), and thus /usr/share/keymaps,
where keymap files live, may not be available for reading at the time we need a keymap file. And no, we won't put 1Mb of keymaps in the
root partition just for this.
And the problem is, most keymap files are not self-contained, so it does not help to just copy the selected file into the root partition.
The best known solution so far is to expand the keymap file so that it becomes self-contained, and put it in the root partition. That's
what this tool does.
Where the boot-time keymap is stored
This program and manual page were written by Yann Dirson firstname.lastname@example.org for the Debian GNU/Linux system, but as it should not include
any Debian-specific code, it may be used by others.
I know the following questions are noobish questions but I am asking them because I am confused about the basics of history behind UNIX and LINUX.
Ok onto business, my questions are-:
Was/Is UNIX ever an open source operating system ?
If UNIX was... (21 Replies)
Hello and thanks in advance for any help anyone can offer me
I'm trying to learn the find command and thought I was understanding it... Apparently I was wrong. I was doing compound searches and I started getting weird results with the -size test. I was trying to do a search on a 1G file owned by... (14 Replies)
i have installed quota on my centos 7 machine and its what im after (setting size limit on users, so they cant fill the hard drive)
i want to now make this part of my create user script for my sftp server so i want to do a echo and a read command so i capture the limit they enter... (0 Replies)
I need to write a shell script which opens a file and increments the version(text) within the file every time the script runs. For example:
$ cat docker_file.yml
So, I would like... (6 Replies)
We use DB2 v10.5 and using DBArtisan tool
Can someone please guide how to convert digits to binary numbers using db2 feature.
Ex> for number 9 , binary should be 1001 ( 8+1)
Any help appreciated. Thanks (2 Replies)
how to using tar with exclude directory and compress it using tar.Z
i only know how to exclude dir only with this command below:
tar -cvf /varios/restore/test.tar -X excludefile.txt /jfma/test1/
how to compress it using 1 command?
Please use CODE tags as... (6 Replies)
Quite an obscure question I think.
We have a rebuild process for remote sites that allows us to PXE rebuild a till (actually a PC with a touch screen and various fancy bits) running CentOS. The current CentOS5 tills work just fine with a tar image restore and some personalisation. Sadly,... (4 Replies)
I had recently learnt a bit of Docker(which provides containerization process).
Here are some of my learning points from it.
Let us start first with very basic question:
What is Docker:
Docker is a platform for sysadmins and developers to DEPLOY, DEVELOP and RUN applications ... (7 Replies)
What is the point of this? Whenever I close my shell it appends to the history file without adding this. I have never seen it overwrite my history file.
# When the shell exits, append to the history file instead of overwriting it
shopt -s histappend (3 Replies)
Hello... And thanks in advance for any help anyone can offer me
I was trying to work out the differences between displaying modify, access, and change times with the 'ls' command. Everything seems in order when I look at files, but the access time on a directory doesn't seem to change when I... (4 Replies)
I am having an issue here with CentOS release 6.6 (Final) that shows all of the space used up, but I can't tell where the space went.
Seemingly I am using up 100%, according to
Filesystem Size Used Avail Use% Mounted on... (27 Replies)
I'm trying to use a bash script for a psych experiment that involves listening to sound files and responding. If I have something like the code below, how can I make sure that a key press is assigned to RESPONSE only after the second echo statement?
for i in 1 2 3; do
... (10 Replies)
After the success of the jq - tool for parsing and manipulating JSON-Data someone wrote a tool called yq, which aims to be the same for YAML, what jq is for JSON. Seems to work fine. I'll definitely give it a chance in future.
... (1 Reply)
I am very pleased to announce that Dave Munro (gull04) is joining the Moderation Team, after being a very valuable member of UNIX.com for 15+ years.
Dave is an IT Consultant with 30 years of experience this year, has worked in many of the industry vertical market segments and has... (6 Replies)