Re: Is there any way of getting the CAN interfaces list, from any C program?

[Wolfgang Grandegger <wg@grandegger.com>]

Hi Kurt,

On 04/24/2013 04:49 PM, Kurt Van Dijck wrote:
> Hi Stephane,
> 
> I have written this some time ago, not using it actually.
> I tried a modular approach, don't know if its usefull.
> 
> PS: I used attachments.

~/enumif$ ./enumif
1: lo	{loopback} <LOOPBACK,UP,LOWER_UP> UNKNOWN
2: eth0	{ether} <BROADCAST,MULTICAST> DOWN
3: eth1	{ether} <BROADCAST,MULTICAST,UP,LOWER_UP> UNKNOWN
4: eth3	{ether} <NO-CARRIER,BROADCAST,MULTICAST,UP> DOWN
5: can0	{can} <NOARP,UP,LOWER_UP,ECHO> UNKNOWN
6: can1	{can} <NOARP,ECHO> DOWN
7: can2	{can} <NOARP,ECHO> DOWN
8: can3	{can} <NOARP,ECHO> DOWN
9: pan0	{ether} <BROADCAST,MULTICAST> DOWN

Cool! We know that "ip link" does list all network interfaces but the
code doing the job is not really strength-forward. I think this would be
a nice enhancement of the can-utils.

Wolfgang.

> 
> Kurt
> 
> On Wed, Apr 24, 2013 at 11:06:24AM +0200, Stephane Grosjean wrote:
>> Hi linux-can members,
>>
>> I currently wonder whether it exists any way of getting the list of
>> the installed CAN interfaces, from a C program?
>> I mean, getting the network interfaces list is available using
>> ioctl(SIOCGIFCONF).
>> But AFAIK, this (only) returns the IP interfaces found in the
>> system, even using a socket CAN file descriptor.
>> And, I would also like to avoid some pipe/fork/grep/sed in this C
>> program too ;-)
>>
>> Thanks for your help and best regards,
>>
>> Stéphane
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