COPY_TO_USER_FROMIO(9) Management of Cards and Device COPY_TO_USER_FROMIO(9)NAME
copy_to_user_fromio - copy data from mmio-space to user-space
SYNOPSIS
int copy_to_user_fromio(void __user * dst, const volatile void __iomem * src, size_t count);
ARGUMENTS
dst
the destination pointer on user-space
src
the source pointer on mmio
count
the data size to copy in bytes
DESCRIPTION
Copies the data from mmio-space to user-space.
RETURN
Zero if successful, or non-zero on failure.
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 COPY_TO_USER_FROMIO(9)
Check Out this Related Man Page
COPY(9) BSD Kernel Developer's Manual COPY(9)NAME
copy, copyin, copyout, copystr, copyinstr, copyoutstr -- kernel space to/from user space copy functions
SYNOPSIS
#include <sys/types.h>
#include <sys/systm.h>
int
copyin(const void *uaddr, void *kaddr, size_t len);
int
copyout(const void *kaddr, void *uaddr, size_t len);
int
copystr(const void *kfaddr, void *kdaddr, size_t len, size_t *done);
int
copyinstr(const void *uaddr, void *kaddr, size_t len, size_t *done);
int
copyoutstr(const void *kaddr, void *uaddr, size_t len, size_t *done);
int
copyin_proc(struct proc *p, const void *uaddr, void *kaddr, size_t len);
int
copyout_proc(struct proc *p, const void *kaddr, void *uaddr, size_t len);
int
ioctl_copyin(int ioctlflags, const void *src, void *dst, size_t len);
int
ioctl_copyout(int ioctlflags, const void *src, void *dst, size_t len);
DESCRIPTION
The copy functions are designed to copy contiguous data from one address to another. All but copystr() copy data from user-space to kernel-
space or vice-versa.
The copy routines provide the following functionality:
copyin() Copies len bytes of data from the user-space address uaddr in the current process to the kernel-space address kaddr.
copyout() Copies len bytes of data from the kernel-space address kaddr to the user-space address uaddr in the current process.
copystr() Copies a NUL-terminated string, at most len bytes long, from kernel-space address kfaddr to kernel-space address kdaddr. If
the done argument is non-NULL, the number of bytes actually copied, including the terminating NUL, is returned in *done.
copyinstr() Copies a NUL-terminated string, at most len bytes long, from user-space address uaddr in the current process to kernel-space
address kaddr. If the done argument is non-NULL, the number of bytes actually copied, including the terminating NUL, is
returned in *done.
copyoutstr() Copies a NUL-terminated string, at most len bytes long, from kernel-space address kaddr to user-space address uaddr in the
current process. If the done argument is non-NULL, the number of bytes actually copied, including the terminating NUL, is
returned in *done.
copyin_proc() Like copyin(), except it operates on the address space of the process p.
copyout_proc() Like copyout(), except it operates on the address space of the process p.
ioctl_copyin() Like copyin(), except it operates on kernel adresses when the FKIOCTL flag is passed in ioctlflags from the ioctl call.
ioctl_copyout()
Like copyout(), except it operates on kernel adresses when the FKIOCTL flag is passed in ioctlflags from the ioctl call.
RETURN VALUES
The copy functions return 0 on success or EFAULT if a bad address is encountered. In addition, the copystr(), copyinstr(), and copyoutstr()
functions return ENAMETOOLONG if the string is longer than len bytes.
SEE ALSO fetch(9), store(9)BSD August 28, 2005 BSD
Hi everyone,
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)
hi all,
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)
Hi everybody,
Which Unix base OS have best performance for HOST virtualization?
I tested SmartOS but it needs another OS to connect remotely!
Thanks in advance. (11 Replies)
Hi All,
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
version: '3.1'
services:
ui:
image: repo-srv.dev.io:5000/facebook/ui:0.0.2-QA1
$
So, I would like... (6 Replies)
Dear Team
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)
hi folks,
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?
Thanx
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)
Hello All,
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)
Hello everyone,
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
df -h
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
echo "Ready?"
sleep 2
... (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.
Example YAML-File:
--- !ruby/object:Puppet::Node::Facts
... (1 Reply)
Dear All,
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)