From 3831fda46bb8c32962153b3af78eba9d24a76435 Mon Sep 17 00:00:00 2001 From: Adam Date: Thu, 5 Oct 2017 13:09:23 -0600 Subject: [PATCH] Refer to relevant bash manual section. --- SC2115.md | 1 + 1 file changed, 1 insertion(+) diff --git a/SC2115.md b/SC2115.md index ea47463..13c1322 100644 --- a/SC2115.md +++ b/SC2115.md @@ -20,6 +20,7 @@ Using `:?` will cause the command to fail if the variable is null or unset. Simi In the case command substitution, assign to a variable first and then use `:?`. This is relevant even if the command seems simple and obviously correct, since forks and execs can fail due to external system limits and conditions, resulting in a blank substitution. +For more details about `:?` see the "Parameter Expansion" section of the Bash man page. ### Exceptions: None.