[ts-7000] Re: Webserver access to /dev/mem

["Keith Gilman" <>]

It is actually the httpd running the script as a cgi task which is 
running as nobody. I'm pretty sure this is not the best way to do 
this but I need to do more research to determine the best way. I was 
just anxious to get the server up and doing something "interesting".

Thanks
-Keith


--- In  Andrew Bealing <> wrote:
> Is your app running as root?  I think it needs to be to have 
O_RDWR access
> to the memory space.
> 
> 
> 
>                                                                    
                                                                     
       
>                       "Keith 
Gilman"                                                              
                                             
>                       <        To:       ts-
                                                 
              
>                       o.com>                   
cc:                                                                  
                           
>                       Sent by:                 Subject:  [ts-7000] 
Webserver access 
to /dev/mem                                                
>                       ts-
                                                       
                                                 
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ps.com                                                               
                                                    
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>                       04/10/2005 
05:27                                                                
                                         
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7000                                                                 
                                                 
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> 
> 
> 
> Newbie to Linux trying to set up a webserver with the TS7250. I 
have
> the server up but I want to be able to read the onboard 
temperature.
> I'm using the test-cgi script that shipped with the board with the
> following two lines added:
> 
> echo UPTIME=`uptime`
> echo TEMP=`./tempSensor' #tempSensor.c downloaded from the TS 
website
> 
> The uptime works as expected but the tempSensor logs the following
> error to the apache error logger:
> 
> tempSensor.c:42 main:Assertion 'fd != -1' failed.
> 
> The source is:
> 
>              int fd = open("/dev/mem", O_RDWR);
>              assert(fd != -1);
> 
> Thanks in advance for any advice
> -Keith
> 
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> Yahoo! Groups Links
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