/**
* Retrieves the environment variable value.
*
* @param name Client index, or 0 to retrieve the server hostname
* @param buffer Buffer to copy name to
* @param buffLength Maximum buffer size
*
* @return Number of cells written to buffer
*/
native GetEnvironmentVariable(const name[], const buffer[], const buffLength);
/**
* Errors:
* @EINVAL - name is NULL, points to a string of length 0, or contains an '=' character.
* @ENOMEM - Insufficient memory to add a new variable to the environment
*/
/**
* Adds the variable 'name' to the environment with the value 'value',
* if 'name' does not already exist. If 'name' does exist in the environment,
* then its value is changed to 'value' if 'overwrite' is nonzero; if 'overwrite' is zero,
* then the value of 'name' is not changed (and returns a success status).
*
* @param name Environment name
* @param value Value to set
* @param owerwrite Overwrite flag
* @param _error Set an error code here if anything goes wrong
*
* @return 0 on success, or -1 on error
*/
native SetEnvironmentVariable(const name[], const value[], const bool:overwrite, &_error = 0);
/**
* Deletes the variable 'name' from the environment.
* If 'name' does not exist in the environment, then the
* function succeeds, and the environment is unchanged.
*
* @param name Environment name
* @param _error Set an error code here if anything goes wrong
*
* @return 0 on success, or -1 on error.
*/
native UnSetEnvironmentVariable(const name[], &_error = 0);
