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Reference Guides
Reference guides are available for functions and commands supported by OML, Tcl, and Python.
Reference Guide for OpenMatrix Language Functions
The Reference Guide contains documentation for all functions supported in the OpenMatrix language.
System Commands
getpid
Returns the current process ID.

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Get Started
Tutorials
User Guide
Reference Guides

What's New
Discover new features and enhancements.
Get Started
Discover Compose, including its language support and system requirements.
Tutorials
The Compose tutorials and associated example model files help introduce you to the basic functionality of the software.
User Guide
Provides detailed information regarding the features and functionality available in Compose.
Reference Guides
Reference guides are available for functions and commands supported by OML, Tcl, and Python.
- Scripting Guide for OpenMatrix Language
  OpenMatrix is a mathematical scripting language.
- Reference Guide for OpenMatrix Language Functions
  The Reference Guide contains documentation for all functions supported in the OpenMatrix language.
  - ABF Commands
  - CAE Commands
  - Calculus Commands
  - Control System Commands
  - Core Minimal Interpreter Commands
  - Data Structure Commands
  - Differential Equations Commands
  - Elementary Math Commands
  - File I/O Commands
  - Geometry Commands
  - CAE Readers Commands
  - GUI Commands
  - HDF5 Reader Commands
  - Linear Algebra Commands
  - Logical Commands
  - Omlh3d Commands
  - Optimization Commands
  - Plotting Commands
  - Polynomial Math Commands
  - Signal Processing Commands
  - Statistical Analysis Commands
  - String Operations Commands
  - System Commands
    - cd
      Changes the current directory to dir.
    - chdir
      Changes the current directory to dir.
    - cputime
      Returns the current cputime used by Compose.
    - date
      Returns the current date as a string in the format DD-MMM-YYYY.
    - delete
      Deletes the file(s), f.
    - diary
      Records all commands and outputs of an interactive session in a file. If no arguments are passed, the diary state is toggled.
    - dir
      Directory listing of the current or specified directory.
    - dos
      Executes a dos command on Windows.
    - encryptfile
      Encrypts a script file into a binary executable file based on the file extension.
    - filesep
      Returns the path separator, dependent on the system.
    - genpath
      Creates a path with the directory and sub-directories under dir.
    - getpid
      Returns the current process ID.
    - ls
      Displays information and contents of file(s) or directories.
    - make_absolute_filename
      Creates an absolute path with input name, without checks made for the existance of the path on disk.
    - mkdir
      Creates the directory newdir in the current working directory by default.
    - rmdir
      Removes the directory dir.
    - startupscript_edit
      Opens the user startup script for editing (GUI application only).
    - startupscript_path
      Shows the path to the user startup script.
    - system
      Executes the shell command stringCommand. If executed in 'sync' mode or without additional inputs, the application waits until the execution is complete. If executed in 'async' mode, stringCommand is executed in a detached thread and control is returned to the application immediately.
    - unix
      Executes the unix shell command stringCommand.
  - Tcl Bridge OML Commands
  - Tcl Bridge Tcl Commands
  - Time Commands
  - Trigonometry Commands
  - OML to Python Bridge Commands
  - Python to OML Bridge Commands
- Python in Compose Reference Guide

Home
Reference Guides
Reference guides are available for functions and commands supported by OML, Tcl, and Python.
Reference Guide for OpenMatrix Language Functions
The Reference Guide contains documentation for all functions supported in the OpenMatrix language.
System Commands
getpid
Returns the current process ID.

What's New
Get Started
Tutorials
User Guide
Reference Guides

getpid

Returns the current process ID.

Syntax

R = getpid

Outputs

R: Current process ID.; Type: integer

Examples

Get the current process ID:

R = getpid

R = 16832

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