skb_copy_datagram_const_iovec(9) [centos man page]
SKB_COPY_DATAGRAM_CO(9) Linux Networking SKB_COPY_DATAGRAM_CO(9)NAME
skb_copy_datagram_const_iovec - Copy a datagram to an iovec.
int skb_copy_datagram_const_iovec(const struct sk_buff * skb, int offset, const struct iovec * to, int to_offset, int len);
buffer to copy
offset in the buffer to start copying from
io vector to copy to
offset in the io vector to start copying to
amount of data to copy from buffer to iovec
Returns 0 or -EFAULT.
the iovec is not modified during the copy.
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 SKB_COPY_DATAGRAM_CO(9)
Check Out this Related Man Page
DOFILEREAD(9) BSD Kernel Developer's Manual DOFILEREAD(9)NAME
dofileread, dofilereadv, dofilewrite, dofilewritev -- high-level file operations
dofileread(struct lwp *l, int fd, struct file *fp, void *buf, size_t nbyte, off_t *offset, int flags, register_t *retval);
dofilewrite(struct lwp *l, int fd, struct file *fp, const void *buf, size_t nbyte, off_t *offset, int flags, register_t *retval);
dofilereadv(struct lwp *l, int fd, struct file *fp, const struct iovec *iovp, int iovcnt, off_t *offset, int flags, register_t *retval);
dofilewritev(struct lwp *l, int fd, struct file *fp, const struct iovec *iovp, int iovcnt, off_t *offset, int flags, register_t *retval);
The functions implement the underlying functionality of the read(2), write(2), readv(2), and writev(2) system calls. They are also used
throughout the kernel as high-level access routines for file I/O.
The dofileread() function attempts to read nbytes of data from the object referenced by file entry fp into the buffer pointed to by buf. The
dofilewrite() function attempts to write nbytes of data to the object referenced by file entry fp from the buffer pointed to by buf.
The dofilereadv() and dofilewritev() functions perform the same operations, but scatter the data with the iovcnt buffers specified by the
members of the iov array.
The offset of the file operations is explicitly specified by *offset. The new file offset after the file operation is returned in *offset.
If the FOF_UPDATE_OFFSET flag is specified in the flags argument, the file offset in the file entry fp is updated to reflect the new file
offset, otherwise it remains unchanged after the operation.
The file descriptor fd is largely unused except for use by the ktrace framework for reporting to userlevel the process's file descriptor.
Upon successful completion the number of bytes which were transferred is returned in *retval.
Upon successful completion zero is returned, otherwise an appropriate error is returned.
The framework for these file operations is implemented within the file sys/kern/sys_generic.c.
SEE ALSO file(9)BSD December 20, 2005 BSD
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)