Function current_exe 

pub fn current_exe() -> Result<PathBuf>

Returns the full filesystem path of the current running executable.

Platform-specific behavior

If the executable was invoked through a symbolic link, some platforms will return the path of the symbolic link and other platforms will return the path of the symbolic link’s target.

If the executable is renamed while it is running, platforms may return the path at the time it was loaded instead of the new path.

Errors

Acquiring the path of the current executable is a platform-specific operation that can fail for a good number of reasons. Some errors can include, but not be limited to, filesystem operations failing or general syscall failures.

Security

The output of this function must be treated with care to avoid security vulnerabilities, particularly in processes that run with privileges higher than the user, such as setuid or setgid programs.

For example, on some Unix platforms, the result is calculated by searching $PATH for an executable matching argv[0], but both the environment and arguments can be be set arbitrarily by the user who invokes the program.

On Linux, if fs.secure_hardlinks is not set, an attacker who can create hardlinks to the executable may be able to cause this function to return an attacker-controlled path, which they later replace with a different program.

This list of illustrative example attacks is not exhaustive.

Examples

use std::env;

match env::current_exe() {
    Ok(exe_path) => println!("Path of this executable is: {}",
                             exe_path.display()),
    Err(e) => println!("failed to get current exe path: {e}"),
};