Accessing the Operating System
This section 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 :
| 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. |