doc: test-writing-guidelines: tst_record_chidlstatus
Add note about passing -1 as a child pid if you want to wait for any of
the process childrens.
Signed-off-by: Cyril Hrubis <chrubis@suse.cz>
diff --git a/doc/test-writing-guidelines.txt b/doc/test-writing-guidelines.txt
index 69b8cb7..2475262 100644
--- a/doc/test-writing-guidelines.txt
+++ b/doc/test-writing-guidelines.txt
@@ -645,6 +645,9 @@
This function does a 'waitpid()' on child process and record child process's
return value into the overall test result.
+NOTE: As 'waitpid()' is used you may pass '-1' as the child pid if you
+ want to wait for any of the process children.
+
2.2.8 Fork() and Parent-child synchronization
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^