linux-kernel - Re: Including STRTOK

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Date:	Mon, 16 Jul 2007 20:19:57 +0800
From:	"Z. Cliffe Schreuders" <c.schreuders@...doch.edu.au>
To:	Jan Engelhardt <jengelh@...putergmbh.de>
CC:	linux-kernel@...r.kernel.org
Subject: Re: Including STRTOK_R in a LSM

What I need is to ignore double delimiters such as (::). This can be 
done trivially with a string comparison to check for "\0". What I want 
to know is if it is ok to include the strtok_r code in my security 
module, or if strtok was removed for a very good reason. I am porting a 
lot of existing code which already uses strtok_r to a kernel security 
module.

Thanks,

Cliffe.

Jan Engelhardt wrote:
> On Jul 16 2007 16:52, Z. Cliffe Schreuders wrote:
>   
>> I am aware strtok was removed from the kernel in 2002. However strtok_r is more
>> desirable than strsep as I do not want to know about 'blank fields' (2
>> consecutive delimiters). Is it acceptable to simply include the strtok_r code
>> in my security module? or should I create a wrapper for strsep to ignore
>> blanks?
>>     
> 12:16 ichi:/dev/shm > cat test.c 
> #include <stdio.h>
> #include <string.h>
> int main(void)
> {
>         char x[] = "foo::bar";
>         char *w = x;
>         char *p;
>         while ((p = strsep(&w, ":")) != NULL)
>                 printf("\"%s\"\n", p);
> }
> 12:16 ichi:/dev/shm > ./a.out 
> "foo"
> ""
> "bar"
>
>
> q.e.d.
>
>
> 	Jan
>   

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