From ef2d1b5c45665cb78307e0fb4314dfcda3fa1490 Mon Sep 17 00:00:00 2001
From: Vidar Holen <vidar@vidarholen.net>
Date: Wed, 2 Nov 2022 20:48:10 -0700
Subject: [PATCH] Created SC3011 (markdown)

---
 SC3011.md | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 SC3011.md

diff --git a/SC3011.md b/SC3011.md
new file mode 100644
index 0000000..5b8ca11
--- /dev/null
+++ b/SC3011.md
@@ -0,0 +1,29 @@
+## In POSIX sh, here-strings are undefined.
+
+### Problematic code:
+
+```sh
+#!/bin/sh
+wc <<< "$1"
+```
+
+### Correct code:
+
+```sh
+#!/bin/sh
+wc << EOF
+$1
+EOF
+```
+
+### Rationale:
+
+Your script uses a shell feature not supported by the shebang. Either rewrite the script to be portable, or change the shebang to explicitly require a shell like Bash. In this specific case, the here-string can be replaced by a single-line here document as shown.
+
+### Exceptions:
+
+None
+
+### Related resources:
+
+* Help by adding links to BashFAQ, StackOverflow, man pages, POSIX, etc!
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