[ts-7000] Re: open("/dev/mem", O_RDWR) returns -1

["sccjazz1" <>]

--- In  "sccjazz1" <> wrote:
>
> I am using the button.c code, which accesses I/O pins and the two 
LEDS 
> on th3 7260 board.  I cross compiled it and can run it as root on 
my 
> TS-7260.  I have a web page with a button and form action code that 
> invokes the binary executable.  The permisions on the executable 
are 
> 777, the permisions on /dev/mem are 777.
> I can invoke a 'Hello World' executable just fine via the web page 
> button.(FYI). The executable is in the cgi-bin directory.  The 
problem 
> is the open("/dev/mem",O_RDWR) statement returns a -1.
> What do I need to do to get this to work...
> 
> Thanks,
> Steve
>

I will reply to my own post.

Try what was sugested in post # 1456, regarding setting the setuid 
bit, chmod +s button.cgi.  (button.cgi is a C executable).

Also, it may not hurt to add the O_SYNC option to the open 
statement...although it made no difference before when I tried it.

Thanks,
Myself






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