[Scilab-users] unix_w(WSCI+"\bin\scilex --help") returns nothing

[Chin Luh Tan]

Hi Samuel, 



I think we could use this instead:



unix_w("Scilex --help  2>&1")



As you mentioned, the "--help" is Scilab 6 dedicated "hardcoded" function, I am yet to look for where is it located from the source, if anyone find out, please share here :).

For some reason, the output message seems  to have sent to stderr(2) instead of stdout(1), so we have to redirect it back to stdout for the unix_? to capture it. 

Similar case happened to Linux.

Thanks.

Regards,
Chin Luh



---- On Wed, 30 Oct 2019 01:33:47 +0800 Samuel Gougeon <mailto:sgougeon at free.fr> wrote ----


Hello,

I have just discovered that, since Scilab 6.0.0, at least for
      windows users (not tested on Linux), the scilex.exe scilab binary
      file can be run with new undocumented options.
 Noticeably, the "--help" one, that shows a list. From a cmd.exe
      shell:
>.\Scilab-6.0.2\bin\scilex
          --help
 Usage: Scilab <options>
       -e Instruction   : execute the scilab instruction given
          in Instruction argument.
                          -e and -f arguments are mutually
          exclusive.
       -f File          : execute the scilab script given in
          File argument.
                          -e and -f arguments are mutually
          exclusive.
       -quit            : force scilab exit after execution of
          script from -e or -f argument.
                          this flag is ignored if it is not
          used with -e or -f argument.
       -l lang          : Change the language of scilab (
          default : en_US ).
       -nw              : Enable console mode.
       -nwni            : Enable terminal mode.
       -ns              : Don't execute etc/scilab.start.
       --help           : Display this help.
       -scihome <dir>   : Force SCIHOME to <dir>.
 Developer Trace arguments:
       --parse-trace    : Display bison state machine
          evolution.
       --AST-trace      : Display ASCII-art AST to be human
          readable.
       --pretty-print   : Display pretty-printed code, standard
          Scilab syntax.
 
 Developer Timer arguments:
       --AST-timed      : Time each AST node.
       --timed          : Time global execution.
 
 Developer Debug arguments:
       --no-exec        : Only do Lexing/parsing do not execute
          instructions.
       --context-dump   : Display context status.
       --exec-verbose   : Display command before running it.
       --timeout delay  : Kill the Scilab process after a
          delay.
However, if i try to run this command from Scilab through a
      unix_*() function, it  returns nothing.
 Nothing in the Scilab session, nothing in the consolebox...:
-->
          unix_w(WSCI+"\bin\scilex --help")
 --> [re,s,e] = unix_g(SCI+"\bin\scilex --help")
  e  =  
 
  s  = 
    0.
 
  re  = 
     []
There is no space in my WSCI path.
 This behavior looks like the http://bugzilla.scilab.org/show_bug.cgi?id=14143 reported for Linux, not confirmed for Windows, and
      fixed in Scilab 6.0.2.
 
 Any confirmation or explanation would be welcome.
 Regards
 Samuel
 
 
 
 
 






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