GETENV Function
Returns the specified equivalence string from the environment of the PV‑WAVE process.
Usage
Input Parameters
name—The scalar string specifying which equivalence string to return from the environment.
Returned Value
result—The equivalence string for name. If name does not exist in the environment, returns a null string.
Keywords
None.
Discussion
None.
UNIX Examples
This command prints information about the environment:
PRINT, 'Current shell is: ', GETENV('SHELL')
This example shows how to read data from a file in a manner that works on either UNIX systems:
OPENR, u, '$WAVE_DIR/data/heartbeat.dat', /Get_Lun FREE_LUN, u
Windows Example
This command prints information about the environment:
PRINT, 'Home Drive is: ', GETENV('HOMEDRIVE')
This example shows how to read data using GETENV to obtain part of a file’s pathname:
OPENR, u, GETENV('WAVE_DIR')+ '\data\heartbeat.dat', /Get_Lun
FREE_LUN, u
