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Re: How create file in the kernel ?

It's difficult, but try this:

- Allocate a memory mapped block for the filename path :

init_addr = VM_MIN_ADDRESS;
(void) vm_allocate(current_map(), &init_addr, MAXPATHLEN, TRUE);

- copy your kernel's memory mapped pathname into the new block

copyoutstr(kernelpath, init_addr,MAXPATHLEN,&lencopied);

- Fill in an Open parameter block :

typedef struct open_args {
char *path;
int flags;
int mode;
} open_args_t;

openargs.path = init_addr;
flags = what you want ...
mode = same ...

- Call the open syscall entry point

register_t retval;
error = (*sysent[SYS_open].sy_call)(current_proc(),openargs,&retval);


The problem is that the opened file descriptor is owned by the current task,
so you have to close the file before returning to user mode.

Also, don't forget to vm_deallocate() the block of memory ;-)

Hope this helps,
--
phildev

> Dear Sir:
> I need a function to create file in driver ,but I don't know how do this.
> where have sample in the kernel open with read file.Thanks
>
> Regards.
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