From 0d4d752e83f664c8e9b135e3e180084bb0b09a39 Mon Sep 17 00:00:00 2001 From: Wang Han <416810799@qq.com> Date: Fri, 21 Feb 2025 00:13:55 +0800 Subject: [PATCH] Correct doc about `temp_dir()` behavior on Android Since commit https://github.com/aosp-mirror/platform_frameworks_base/commit/d5ccb038f69193fb63b5169d7adc5da19859c9d8, `TMPDIR` will be set to application's cache dir when app starts. --- library/std/src/env.rs | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/library/std/src/env.rs b/library/std/src/env.rs index adbd68896241c..4a071b4e1faec 100644 --- a/library/std/src/env.rs +++ b/library/std/src/env.rs @@ -668,7 +668,9 @@ pub fn home_dir() -> Option { /// 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 returns `/data/local/tmp`. +/// 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][appledoc].