Kernel backup

Hi, I'm working on a project and might do multiple making - I'm afraid if things go wrong. How to keep a backup of the current kernel? Thanks ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org

Re: Kernel backup

Before even trying to do any development, I think that you need to learn about GRUB (or what bootloader you are using) and how to be able to chose from multiple kernels when booting. On Tue, May 27, 2014 at 7:56 AM, Nada Saif nada.sa...@gmail.com wrote: Hi, I'm working on a project and might

Re: Download Linus's latest git tree

Hi All, You can try following steps to checkout to the latest stable kernel. # First clone to the current release. git clone git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git linux-stable cd linux-stable # Create local branch stable git checkout -b stable # Added a remote git

Open and copy a file from the kernel

Hi, I want to process a copy operation from file sent from user space - this copying should be inside the kernel.. I read about using filp_open , will this help me ? Thanks, Nada ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org

Re: Kernel backup

On 27-05-14 08:56:27, Nada Saif wrote: I'm working on a project and might do multiple making - I'm afraid if things go wrong. How to keep a backup of the current kernel? Just use the packet management of your distribution to build and install new kernels. Under normal circumstances you'd then

Re: Open and copy a file from the kernel

On Tue, 27 May 2014 10:19:37 +0300, Nada Saif said: I want to process a copy operation from file sent from user space - this copying should be inside the kernel.. Why? What problem are you trying to solve by doing this? This is almost certainly a bad design, for a number of reasons. And

Re: Open and copy a file from the kernel

how about call_usermodehelper? On Tue, May 27, 2014 at 3:19 PM, Nada Saif nada.sa...@gmail.com wrote: Hi, I want to process a copy operation from file sent from user space - this copying should be inside the kernel.. I read about using filp_open , will this help me ? Thanks, Nada

Re: Open and copy a file from the kernel

On Tue, May 27, 2014 at 12:49 PM, Nada Saif nada.sa...@gmail.com wrote: Hi, I want to process a copy operation from file sent from user space - this copying should be inside the kernel.. I read about using filp_open , will this help me ? I guess you want to open the files inside kernel and

Re: Download Linus's latest git tree

On Tue, 27 May 2014 00:16:52 -0700, Anand Moon said: Please share your thoughts on this. I'd do it slightly differently, by keeping a master copy of Linus's tree, and a separate tree for the -stable additions (and other separate trees for linux-next or whatever else you feel like...) I keep my

Re: Download Linus's latest git tree

Hi Validis, Thanks for this new approach. -Anand Moon On Tuesday, May 27, 2014 2:07 PM, valdis.kletni...@vt.edu valdis.kletni...@vt.edu wrote: On Tue, 27 May 2014 00:16:52 -0700, Anand Moon said: Please share your thoughts on this. I'd do it slightly differently, by keeping a master copy

Re: Open and copy a file from the kernel

On Tue, May 27, 2014 at 3:05 PM, Nada Saif nada.sa...@gmail.com wrote: Hi Srivastava, Thanks for your answer. I want to make a backup of any opened file.. whenever the file is opened or updated , it's reflected on its backup.. Hmm, not really done this but i guess you need inotify hooks and

Re: How to trace the send() in client call

Hi Augusto, But there will be other packets also coming from the network like if some one is browsing the net on mozilla. I only want to trace the send() calls that i have used in my code,is that possible? Regards On Tue, May 27, 2014 at 3:49 AM, Augusto Mecking Caringi

Simple Misc Driver - Problem with string copy to user

Hi! Goal, when the user do : # head -1 /dev/miscdrv The driver prints: Hello World! Steps: # Make # insmod misc.ko # head -1 /dev/miscdrv Why my driver doesn't work ? What is worg with my read operation? static ssize_t misc_drv_read(struct file *filp, char __user * buf, size_t count, loff_t

Re: Simple Misc Driver - Problem with string copy to user

Lucas Tanure tan...@linux.com writes: What is worg with my read operation? static ssize_t misc_drv_read(struct file *filp, char __user * buf, size_t count, loff_t * offp){ int nbytes; char * string = hello World; nbytes = copy_to_user(buf, string, 12); return nbytes; }

Re: Simple Misc Driver - Problem with string copy to user

So, My misc_drv_read returns 0, and it's ok. So why the command head didn't get the string ? -- Lucas Tanure +55 (19) 988176559 On Tue, May 27, 2014 at 9:59 AM, Bjørn Mork bj...@mork.no wrote: Lucas Tanure tan...@linux.com writes: What is worg with my read operation? static ssize_t

Re: Simple Misc Driver - Problem with string copy to user

Lucas Tanure tan...@linux.com writes: So, My misc_drv_read returns 0, and it's ok. So why the command head didn't get the string ? You told it that it got a string with length 0. And that's what it printed. Bjørn ___ Kernelnewbies mailing list

Re: Simple Misc Driver - Problem with string copy to user

Wow, many thanks. So the read operation should return the total number of bytes, not a true/false int. I need to read more about this operations. Thanks -- Lucas Tanure +55 (19) 988176559 On Tue, May 27, 2014 at 10:05 AM, Bjørn Mork bj...@mork.no wrote: Lucas Tanure tan...@linux.com writes:

Re: Simple Misc Driver - Problem with string copy to user

Hi! On Die, 2014-05-27 at 10:09 -0300, Lucas Tanure wrote: Wow, many thanks. So the read operation should return the total number of bytes, not a true/false int. The syscall here (done by `head`) is read() ... I need to read more about this operations. .. and the drivers .read function is

Re: Download Linus's latest git tree

On Tue, May 27, 2014 at 04:35:13AM -0400, valdis.kletni...@vt.edu wrote: On Tue, 27 May 2014 00:16:52 -0700, Anand Moon said: Please share your thoughts on this. I'd do it slightly differently, by keeping a master copy of Linus's tree, and a separate tree for the -stable additions (and

Re: How to trace the send() in client call

On Tue, May 27, 2014 at 8:31 AM, Robert Clove cloverob...@gmail.com wrote: But there will be other packets also coming from the network like if some one is browsing the net on mozilla. I only want to trace the send() calls that i have used in my code,is that possible? Robert, You must

Re: Download Linus's latest git tree

On Tue, 27 May 2014 07:28:34 -0700, Greg KH said: So are you doing this as root? Because you should never do kernel development as root, just put kernel source trees in your home directory somewhere, like under ~/linux/ No, I'm not doing the builds as root. /usr/src has been fixed to be owned

Re: Download Linus's latest git tree

Have you try the git archive instead of git clone? , if you do not need the history this git option rocks On Tue, May 27, 2014 at 11:16 AM, valdis.kletni...@vt.edu wrote: On Tue, 27 May 2014 07:28:34 -0700, Greg KH said: So are you doing this as root? Because you should never do kernel

Re: Download Linus's latest git tree

On Tue, 27 May 2014 11:28:19 -0500, Victor Rodriguez said: Have you try the git archive instead of git clone? , if you do not need the history this git option rocks That has the same problem as 'clone --depth 1' - you can't bisect using the resulting tree. pgplGNsmTr6Xg.pgp Description: PGP

Re: Simple Misc Driver - Problem with string copy to user

I think it is good for you to read LDD3 or google some corresponding materials at first. 2014-05-27 20:48 GMT+08:00 Lucas Tanure tan...@linux.com: Hi! Goal, when the user do : # head -1 /dev/miscdrv The driver prints: Hello World! Steps: # Make # insmod misc.ko # head -1 /dev/miscdrv