Re: [gpsd-dev] test failures with shmget

[Eric S. Raymond]

Gary E. Miller <address@hidden>:
> > ------ Shared Memory Segments --------
> > key        shmid      owner      perms      bytes      nattch
> > status 0x4e545030 0          root       600        96
> > 2 0x4e545031 32769      root       600        96
> > 2 0x4e545032 65538      root       666        96
> > 1 0x4e545033 98307      root       666        96
> > 1 0x47505344 131076     root       666        8248
> > 0 0x4e545034 163845     root       666        96
> > 1 0x4e545035 196614     root       666        96
> > 1 0x4e545036 229383     root       666        96
> > 1 0x4e545037 262152     root       666        96
> > 1                       
> > 
> > Notice NTP4 (0x47505344)  has a size of 8248.  They should all be 96!
> 
> Gack.  My mistake.  0x47505344 clearly is GPSD, not NTP4.

That is correct.
 
> 8248 is sizeof(struct gps_data_t) 
> 
> So this is an occasional.  Things like building with qt=no will change
> the size of gps_data_t.  Any shmid laying around from prior to a
> change will be the wrong size.

Yes.  Good catch.

> The test code just needs to delete shmid 0x47505344 before and/or after
> it runs the tests.

Adding that now.
-- 
                <a href="http://www.catb.org/~esr/";>Eric S. Raymond</a>

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