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

[Chin Luh Tan]

fantastic, thanks for pointing this out!



rgds,

Chin Luh


---- On Thu, 31 Oct 2019 04:16:04 +0800 Samuel Gougeon <sgougeon at free.fr> wrote ----


Le 30/10/2019 à 02:33, Chin Luh Tan a
      écrit :

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. 



The whole thing is to know which reason. Clearly,  std::cerr is
      intentionally targeted,
 in the source file \scilab\modules\startup\src\cpp\scilab.cpp:
 static void usage(void)
 {
     std::cerr << "Usage: Scilab <options>"
          << std::endl;
     std::cerr << "      -e Instruction   :
          execute the scilab instruction given in Instruction argument."
          << std::endl;
     std::cerr << "                         -e and
          -f arguments are mutually exclusive." << std::endl;
     std::cerr << "      -f File          :
          execute the scilab script given in File argument." <<
          std::endl;
     std::cerr << "                         -e and
          -f arguments are mutually exclusive." << std::endl;
     std::cerr << "      -quit            : force
          scilab exit after execution of script from -e or -f argument."
          << std::endl;
     std::cerr << "                         this
          flag is ignored if it is not used with -e or -f argument."
          << std::endl;
     std::cerr << "      -l lang          : Change
          the language of scilab ( default : en_US )." <<
          std::endl;
     std::cerr << "      -nw              : Enable
          console mode." << std::endl;
     std::cerr << "      -nwni            : Enable
          terminal mode." << std::endl;
     std::cerr << "      -ns              : Don't
          execute etc/scilab.start." << std::endl;
     std::cerr << "      --help           :
          Display this help." << std::endl;
     std::cerr << "      -scihome <dir>   :
          Force SCIHOME to <dir>." << std::endl;
     std::cerr << "Developer Trace arguments:"
          << std::endl;
     std::cerr << "      --parse-trace    :
          Display bison state machine evolution." << std::endl;
     std::cerr << "      --AST-trace      :
          Display ASCII-art AST to be human readable." <<
          std::endl;
     std::cerr << "      --pretty-print   :
          Display pretty-printed code, standard Scilab syntax." <<
          std::endl;
     std::cerr << " " << std::endl;
     std::cerr << "Developer Timer arguments:"
          << std::endl;
     std::cerr << "      --AST-timed      : Time
          each AST node." << std::endl;
     std::cerr << "      --timed          : Time
          global execution." << std::endl;
     std::cerr << " " << std::endl;
     std::cerr << "Developer Debug arguments:"
          << std::endl;
     std::cerr << "      --no-exec        : Only
          do Lexing/parsing do not execute instructions." <<
          std::endl;
     std::cerr << "      --context-dump   :
          Display context status." << std::endl;
     std::cerr << "      --exec-verbose   :
          Display command before running it." << std::endl;
     std::cerr << "      --timeout delay  : Kill
          the Scilab process after a delay." << std::endl;
 }
 


_______________________________________________
users mailing list 
users at lists.scilab.org 
http://lists.scilab.org/mailman/listinfo/users
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.scilab.org/pipermail/users/attachments/20191031/846a1ae5/attachment.htm>