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[LDM #GPE-962059]: Number of arguments in pqact



Justin,

> We are having an issue when trying to pipe to a decoder using LDM 6.4.4
> 
> Here is our pqact.conf entry:
> ---
> NMC3    (^ASUS6)|(^SR(HW|PU|AK5|US27|US32))|(^S[RX]US[57])
> PIPE    bin/decod_dcshef -v 2 -t 450 -d
> /dcomdev/us007003/decoder_logs/decod_dcshef.log
> tables/SHEFPARM
> tables/stns/shef.tbl
> /dcomdev/us007003/bufrtab.000
> A. E. G. P. R. S. T. U. X.
> ---
> 
> And here is the error in ldmd.log:
> 
> ---
> Nov 07 16:14:21 b2n1 pqact[614580] INFO:                pipe:
> bin/decod_dcshef -v 2 -t 450 -d
> /dcomdev/us007003/decoder_logs/decod_dcshef.log     tables/SHEFPARM
> tables/stns/shef.tbl    /dcomdev/us007003/bufrtab.000   A. E. G. P. R.
> S. T. U. X.
> Nov 07 16:14:21 b2n1 pqact[622728] ERROR: Couldn't
> exec(bin/decod_dcshef): Bad address
> Nov 07 16:14:21 b2n1 pqact[622728] NOTE: Exiting
> Nov 07 16:14:21 b2n1 pqact[614580] INFO:                pipe:
> bin/decod_dcacar  -v 2  -t 600  -d
> /dcomdev/us007003/decoder_logs/decod_dcacar.log
> /dcomdev/us007003/bufrtab.ARINC_ACARS
> /dcomdev/us007003/bufrtab.E-ADAS        /dcomdev/us007003/bufrtab.004
> Nov 07 16:14:21 b2n1 pqact[614580] NOTE: child 622728 exited with status
> 1
> (bin/decod_dcshef-v2-t450-d/dcomdev/us007003/decoder_logs/decod_dcshef.logtables/SHEFPARMtables/stns/shef.tbl/dcomdev/us007003/bufrtab.000A.E.G.P.R.S.
> T. U. X.)
> ---
> 
> The decoder is failing because it looks like the last 3 arguments are
> not being passed in. Is there a limit on the number of arguments (in our
> case 18) or length of the total string for the decoder?

pqact(1) limits the number of elements in the argv[] array to 16.  Subtracting
the pathname of the program to be executed (argv[0]) and the terminating NULL
pointer, this means that the limit on the number of arguments to a PIPE
decoder is 14.  This is too small.  I'll fix it and make a new release.  In
the meantime, can you use fewer arguments?

Regards,
Steve Emmerson

Ticket Details
===================
Ticket ID: GPE-962059
Department: Support LDM
Priority: Normal
Status: Closed


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