Accessing the Operating System

Application Developer Guide > Accessing the Operating System

This chapter discusses the methods for communicating with the operating system from PV-WAVE. The main topics include:

Manipulating environment variables (UNIX/Windows)

Using SPAWN to access the operating system

Changing the current directory

The utility routines used to communicate with specific operating systems are summarized in Routines for Accessing the Operating System:

Table 1-1: Routines for Accessing the Operating System
Method	UNIX	Win	Use
SPAWN	Yes	Yes	Lets you spawn a child process to execute commands. The output generated by the commands can be captured in a variable for later processing by PV-WAVE.
GETENV, SETENV, ENVIRONMENT	Yes	Yes	Manipulate environment variables.
SET_SYMBOL, GET_SYMBOL, DELETE_SYMBOL	No	No	Manipulate DCL interpreter symbols.
CD, PUSHD, POPD, PRINTD	Yes	Yes	Let you change the current working directory.

Version 2017.0