[KJ] proc entry path name

[KJ] proc entry path name

[Amol Lad]

Hi,

I'm doing create_proc_entry return code audit. On failure I would like
to print "Unable to create /proc/foo/bar". 

Is there a function that takes struct proc_dir_entry * and returns
fullpathname ?



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Re: [KJ] proc entry path name

[Alexey Dobriyan]

On Fri, Sep 15, 2006 at 05:09:30PM +0530, Amol Lad wrote:
> I'm doing create_proc_entry return code audit. On failure I would like
> to print "Unable to create /proc/foo/bar".
>
> Is there a function that takes struct proc_dir_entry * and returns
> fullpathname ?

Me not understand why would you want it.

	entry = create_proc_entry("alexey", 0644, NULL);
	if (!entry) {
		printk(KERN_ERR "foo: create_proc_entry alexey failed\n");
			...
	}

	Alexey #define KERN_ERR "" Dobriyan

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Re: [KJ] proc entry path name

[walter harms]

hi all,
 so far i understand the question was how to:

entry = create_proc_entry("alexey", 0644, NULL);
if (!entry) {
		printk(KERN_ERR "foo: create_proc_entry >%s< failed\n",realpath);
	}


KERN_ERR "foo: create_proc_entry  >/proc/maintainers/janitor/alexey< failed

in very nested configurations (that you should not have) there may be more than
one alexey. and you end up with a knowledge that one of them failed.
something like getcwd() would be helpful.


re,
 walter

Alexey Dobriyan wrote:
> On Fri, Sep 15, 2006 at 05:09:30PM +0530, Amol Lad wrote:
>> I'm doing create_proc_entry return code audit. On failure I would like
>> to print "Unable to create /proc/foo/bar".
>>
>> Is there a function that takes struct proc_dir_entry * and returns
>> fullpathname ?
> 
> Me not understand why would you want it.
> 
> 	entry = create_proc_entry("alexey", 0644, NULL);
> 	if (!entry) {
> 		printk(KERN_ERR "foo: create_proc_entry alexey failed\n");
> 			...
> 	}
> 
> 	Alexey #define KERN_ERR "" Dobriyan
> 
> _______________________________________________
> Kernel-janitors mailing list
> Kernel-janitors@lists.osdl.org
> https://lists.osdl.org/mailman/listinfo/kernel-janitors
> 
> 
> 
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Re: [KJ] proc entry path name

[steve]

Hi,

walter harms wrote:
> hi all,
>  so far i understand the question was how to:
>
> entry = create_proc_entry("alexey", 0644, NULL);
> if (!entry) {
> 		printk(KERN_ERR "foo: create_proc_entry >%s
> 	}
>
>
> KERN_ERR "foo: create_proc_entry  >/proc/maintainers/janitor/alexey
>
> in very nested configurations (that you should not have) there may be more than
> one alexey. and you end up with a knowledge that one of them failed.
> something like getcwd() would be helpful.

Correct me if I am wrong but isn't it true that if create_proc_entry() is called
with the 3rd parameter as NULL, it implies that the parent directory is '/proc'
(or technically the symbol - 'proc_root') ?

Also, isn't it true, if it is not called this way, (ie: if it is called as -
create_proc_entry("foobar", 0644, parent)) then parent->name is the full path of
the parent ?

Regards
Steve






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Re: [KJ] proc entry path name

[Amol Lad]

> Also, isn't it true, if it is not called this way, (ie: if it is called as -
> create_proc_entry("foobar", 0644, parent)) then parent->name is the full path of
> the parent ?

parent->name does not contains the full path of the parent. I think the
only way to generate a full pathname is:

for (ent = leaf; ent != &proc_root; ent = ent->parent) {
	/* Extract ent->name and use it in preparing full pathname */
}
	

> 
> Regards
> Steve
> 
> 
> 
> 
> 
> 
> _______________________________________________
> Kernel-janitors mailing list
> Kernel-janitors@lists.osdl.org
> https://lists.osdl.org/mailman/listinfo/kernel-janitors
> 
> 

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