R: Get Environment Variables

Sys.getenv {base} | R Documentation

## Get Environment Variables

### Description

`Sys.getenv` obtains the values of the environment variables named by `x`.

### Usage

    Sys.getenv(x)

### Arguments

`x` | a character vector, or missing

### Value

A vector of the same length as `x`, with the variable names as its `names` attribute. Each element holds the value of the environment variable named by the corresponding component of `x` (or `""` if no environment variable with that name was found).
On most platforms `Sys.getenv()` will return a named vector giving the values of all the environment variables.

### See Also

`Sys.putenv`, `Sys.getlocale` for the locale “environment”, `getwd` for the working directory.

### Examples

    ## whether HOST is set will be shell-dependent e.g. Solaris' csh does not.
    Sys.getenv(c("R_HOME", "R_PAPERSIZE", "R_PRINTCMD", "HOST"))

    str(s <- Sys.getenv()) # all settings (rather do not print)

    ## Language and Locale settings -- but rather use Sys.getlocale()
    s[grep("^L(C|ANG)", names(s))]

[Package base version 2.4.1 Index]