CODING_STYLE: add section about _exit()

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

diff --git a/CODING_STYLE.md b/CODING_STYLE.md
index 64974fa842a0055d0bf78d6e5328e6acb73b1356..a3bf41a4acab7d91b001939f539d64b0cadad44d 100644 (file)
--- a/CODING_STYLE.md
+++ b/CODING_STYLE.md
@@ -512,3 +512,8 @@ rules to use them:
       Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
 
   ```
+#### Use `_exit()` To Terminate `fork()`ed Child Processes
+
+- When `fork()`ing off a child process use `_exit()` to terminate it instead of
+  `exit()`. The `exit()` function is not thread-safe and thus not suited for
+  the shared library which must ensure that it is thread-safe.