Updated SC3028 (markdown)

SC3028.md

@@ -22,6 +22,12 @@ echo "$(hostname) $(id -u) $(awk 'BEGIN { srand(); print int(rand()*32768) }' /d
 
 The variable you are attempting to use is a special variable in bash or ksh. To get the same information from `dash` or POSIX `sh`, use an external command instead.
 
+For `PIPESTATUS`, the pipeline can be instrumented to record the exit value of each command:
+
+```sh
+{ cmd0; echo $? > status0; } | { cmd1; echo $? > status1; } | cmd2
+```
+
 ### Exceptions:
 
 If you only intend to target shells that supports this feature, you can change