Hi Darren,
Darren J Moffat wrote:
> yang wrote:
>> Hi all,
>> when define _KERNEL, I use:
>> FILE * fp;
>> fp=fileopen("path","w");
>
> I assume you mean fopen(). That is a stdio interface which exists only
> in userland via libc.
>
> When you say you defined _KERNEL are you actually building a kernel
> module ? If not then you should not define _KERNEL.
>
>> So in C files , how can I open a fild and write something into it in _KERNEL
>> stat?
>
> It is quite difficult and usually avoided to read files in the kernel.
> Instead a userland helper program is often used to read and parse the
> file into structured content and pass it over an ioctl or syscall to the
> kernel driver.
There does have the requirement to read files in the kernel.
We're working on a 10Gb Ethernet driver and we want to let the driver
update the firmware on-the-fly if needed when the driver is loaded.
Save the firmware image in a separate file and let the driver read it
with kobj_open_file() should be an option. But kobj_open_file() is not a
stable interface. So what's the best practice for the task like this?
Thanks,
Lucy
>
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