Another thought - does permissions need to be set on a file somewhere to
allow the shared memory to work for all users? I did:
./configure <options>
make
make install
I didn't run make setuid. Is that still needed for a make install?
Andy
-------- Original Message --------
A little bit more info:
When this function is called:
retval = rtapi_shmem_getptr(mem_id, &mem);
mem_id = 1. Upon return, mem = 0x0 and retval = 0.
So it seems the shared memory system doesn't work properly as mem should
never be set to zero. This is pretty much the limit of my debugging
abilities.
Andy
Andrew Ayre wrote:
> Thanks. It seg faults at line 2350 in hal_lib.c:
>
> static int init_hal_data(void)
> {
> /* has the block already been initialized? */
> if (hal_data->version != 0) {
>
> It appears that hal_data is NULL at this point. Here is the call stack:
>
> hal/utils/halcmd_main.c:195 (main)
> hal/utils/halcmd.c:109 (halcmd_startup)
> hal/hal_lib.c:2350 (hal_init)
>
> Andy
>
> Jeff Epler wrote:
>> A system call trace (produced by using "strace") or a backtrace at the
>> time of the segmentation fault (produced using "gdb") would be helpful
>> in pinpointing the location of the problem.
>>
>> You can find information how to use these utilities on many pages on the
>> internet.
>>
>> Jeff
>>
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>
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Andy
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Andy
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