Reference Guide > G Routines > GETENV Function
  

GETENV Function
Returns the specified equivalence string from the environment of the PV‑WAVE process.
Usage
result = GETENV(name)
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
See Also
ENVIRONMENT,   SETENV

Version 2017.0
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