CEnvironment Class Reference

Platform-independent environment variables manipulations. More...

#include <Environment.h>

Static Public Member Functions
static int	setenv (const std::string &name, const std::string &value, int overwrite=1)
	Sets or unsets environment variable.
static int	unsetenv (const std::string &name)
	Deletes environment variable.
static int	putenv (const std::string &envstring)
	Adds/modifies/deletes environment variable.
static std::string	getenv (const std::string &name)
	Gets value of environment variable in UTF-8 encoding.

Detailed Description

Platform-independent environment variables manipulations.

Provide analog for POSIX functions:

• setenv
• unsetenv
• putenv
• getenv

You can generally use the functions as you would normally in POSIX-style. The differences below are just to make things more convenient through use of std::string (2,3), and to also allow the Win32-style of unsetting variables (4,5) if wanted.

1. CEnvironment::setenv parameter 'overwrite' is optional, set by default to 1 (allow overwrite).
2. CEnvironment::putenv uses copy of provided string (rather than string itself) to change environment, so you can free parameter variable right after call of function.
3. CEnvironment::getenv returns a copy of environment variable value instead of pointer to value.
4. CEnvironment::setenv can be used to unset variables. Just pass empty string for 'value' parameter.
5. CEnvironment::putenv can be used to unset variables. Set parameter to 'var=' (Windows style) or just 'var' (POSIX style), and 'var' will be unset.

All 'std::string' types are supposed to be in UTF-8 encoding. All functions work on all platforms. Special care is taken on Windows platform where Environment is changed for process itself, for process runtime library and for all runtime libraries (MSVCRT) loaded by third-party modules. Functions internally make all necessary UTF-8 <-> wide conversions.*

Member Function Documentation

getenv()

std::string CEnvironment::getenv ( const std::string & name )

static

Gets value of environment variable in UTF-8 encoding.

Parameters

name	The name of environment variable.

Returns

Copy of of environment variable value or empty string if variable in not present in environment.

See also

xbmc_getenvUtf8, xbmc_getenvW

putenv()

int CEnvironment::putenv ( const std::string & envstring )

static

Adds/modifies/deletes environment variable.

Parameters

envstring

The variable-value string in form 'var=value'. If set to 'var=' or 'var', then variable will be deleted from the environment.

Returns

Zero on success, non-zero on error.

setenv()

int CEnvironment::setenv ( const std::string & name, const std::string & value, int overwrite = 1 )

static

Sets or unsets environment variable.

Parameters

name	The environment variable name to add/modify/delete.
value	The environment variable new value. If set to empty string, variable will be deleted from the environment.
overwrite	(optional) If set to non-zero, existing variable will be overwritten. If set to zero and variable is already present, then variable will be unchanged and function returns success.

Returns

Zero on success, non-zero on error.

unsetenv()

int CEnvironment::unsetenv ( const std::string & name )

static

Deletes environment variable.

Parameters

name	The environment variable name to delete.

Returns

Zero on success, non-zero on error.

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The documentation for this class was generated from the following files:

• Environment.h
• Environment.cpp