env.h File Reference

#include <stdbool.h>
#include "rcutils/macros.h"
#include "rcutils/visibility_control.h"
#include "rcutils/get_env.h"

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Functions
bool	rcutils_set_env (const char *env_name, const char *env_value)
	Set or un-set a process-scoped environment variable. More...

Function Documentation

rcutils_set_env()

bool rcutils_set_env	(	const char *	env_name,
		const char *	env_value
	)

Set or un-set a process-scoped environment variable.

This function modifies the environment variables for the current process by copying given string values into the process' global environment variable store.

Thread Safety:

This function is not thread-safe, particularly when called concurrently with rcutils_get_env. Take care not to modify the environment variables while another thread might be reading or writing environment variables.

Platform Consistency:

The behavior when setting a variable to an empty string ("") differs between platforms. On Windows, the variable is un-set (as if env_value was NULL), while on other platforms the variable is set to an empty string as expected.

Parameters

[in]	env_name	Name of the environment variable to modify.
[in]	env_value	Value to set the environment variable to, or NULL to un-set.

Returns

True if success

False if env_name is invalid or NULL

False on failure