[Scilab-users] Odd behaviour with dos() function

[Federico Miyara]

I do the following:

comands = "start | dir H:\ "
dos(comands, "-echo")

Then a command line DOS window opens at the workihg directory of Scilab, 
and doesn't close.

Any further action I attempt with Scilab causes a program crash. The 
same happens without the pipe symbol |.

Regards,

Federico Miyara



On 28/07/2021 10:57, Lester Anderson wrote:
> Hello all,
>
> This has been queried previously without an obvious solution.
>
> For example: [output, bOK]=dos('grdinfo Test_10-FAA.grd')
> Fails with bOK = F
>
> Adding 'start grdinfo Test_10-FAA.grd gives bOK=T but now dos window 
> console with the result
>
> The only way to get the out put shown below is to put the commands 
> into a bathch  file:
> grd-info.bat (containing the command stream grdinfo Test_10-FAA.grd
>
> Such that the dos function becomes: [out,TF]=dos('start 
> grd-info.bat'); out, TF
>
> \D_Drive\Geoscience\Scilab>grdinfo Test_10-FAA.grd
> Test_10-FAA.grd: Title:
> Test_10-FAA.grd: Command: grdsample -R-10/10/-10/10 -I1m 
> @GMTAPI at -000001 -Gc:\Temp\Test_10-FAA.grd -fg --GMT_HISTORY=false
> Test_10-FAA.grd: Remark:
> Test_10-FAA.grd: Pixel node registration used [Geographic grid]
> Test_10-FAA.grd: Grid file format: nf = GMT netCDF format (32-bit 
> float), CF-1.7
> Test_10-FAA.grd: x_min: -10 x_max: 10 x_inc: 0.0166666666667 (1 min) 
> name: longitude n_columns: 1200
> Test_10-FAA.grd: y_min: -10 y_max: 10 y_inc: 0.0166666666667 (1 min) 
> name: latitude n_rows: 1200
> Test_10-FAA.grd: v_min: -104.96169281 v_max: 456.651062012 name: z
> Test_10-FAA.grd: scale_factor: 1 add_offset: 0
> Test_10-FAA.grd: format: netCDF-4 chunk_size: 134,134 shuffle: on 
> deflation_level: 3
>
> However, even with this workaround, nothing is written to the variable 
> 'out'. The program 'grdinfo' is in the Windows path, so should be run 
> without using start. In the past, the function did work. Basic Windows 
> commands like {out, TF]=dos('dir') works.
>
> I have verified that nothing is written to the consolebox. In 
> addition, this is a new computer and new install of Scilab 6.1.1
> Also, the same function under Octave runs correctly as dos('grdinfo 
> Test_10-FAA.grd'), and I am assuming the Scilab version should behave 
> the same.
>
> Since the mailinglists section is no longer functional, I cannot check 
> for possible solutions or pointers. Apologies if this is repeating my 
> previous query on the issue.
>
> Thanks
>
> Lester
>
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