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Scilab Help >> Input/Output functions > OS_commands > unix_w


executes some Windows, Linux or MacOS instructions: output in Scilab's console





A single text: instruction(s) Windows, Linux or MacOS to be executed.


unix_w(…) opens a new session of the Operating System (OS) command interpreter (sh with Linux, cmd.exe with Windows, etc..), sends commands to it, lets it processing commands instructions, receives the standard output and possible error message yielded by the processing, and closes the interpreter session.

The starting working directory and environment variables of the opened interpreter are set as described for host().

The standard output returned by the OS is displayed in Scilab's console ("_w" stands for the main Scilab's "Window").

If an instruction in commands generates an error,

  • the error message from the OS is displayed in the Scilab console
  • unix_w stops and displays its own error message in the Scilab console.
  • In commands, the remaining unprocessed instructions are ignored.
The effects of valid instructions processed before the erroneous one remain actual (for instance, deleted files). However, their standard output is lost: It is not displayed in the Scilab console.
commands with multiple instructions are not recommended. They are more difficult to debug.


if getos() == 'Windows' then
  unix_w("dir "+'""'+WSCI+"\modules"+'""');
  unix_w("ls $SCI/modules");

See also

  • unix_g — executes some Windows, Linux or MacOS instructions: output in variables
  • unix_s — executes some Windows, Linux or MacOS instructions: output canceled (Silent mode)
  • unix_x — executes some Windows, Linux or MacOS instructions: output in a dedicated window
  • host — executes a Windows, Linux, or MacOS command
  • powershell — executes a command with the Windows powershell interpreter (Windows only)
  • setenv — set the value of an environment variable
  • getos — return Operating System name and version
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<< unix_s OS_commands unix_x >>

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Last updated:
Tue Feb 25 08:49:20 CET 2020