Function temp_dir

pub fn temp_dir() -> PathBuf

Returns the path of a temporary directory.

The temporary directory may be shared among users, or between processes with different privileges; thus, the creation of any files or directories in the temporary directory must use a secure method to create a uniquely named file. Creating a file or directory with a fixed or predictable name may result in “insecure temporary file” security vulnerabilities. Consider using a crate that securely creates temporary files or directories.

Note that the returned value may be a symbolic link, not a directory.

Platform-specific behavior

On Unix, returns the value of the TMPDIR environment variable if it is set, otherwise the value is OS-specific:

• On Android, there is no global temporary folder (it is usually allocated per-app), it will return the application’s cache dir if the program runs in application’s namespace and system version is Android 13 (or above), or /data/local/tmp otherwise.
• On Darwin-based OSes (macOS, iOS, etc) it returns the directory provided by confstr(_CS_DARWIN_USER_TEMP_DIR, ...), as recommended by Apple’s security guidelines.
• On all other unix-based OSes, it returns /tmp.

On Windows, the behavior is equivalent to that of GetTempPath2 / GetTempPath, which this function uses internally.

Note that, this may change in the future.

use std::env;

fn main() {
    let dir = env::temp_dir();
    println!("Temporary directory: {}", dir.display());
}