From 0b7b9e562df535bb63f93e6a86b714427fa4db7c Mon Sep 17 00:00:00 2001
From: Vidar Holen <vidar@vidarholen.net>
Date: Wed, 2 Nov 2022 20:45:58 -0700
Subject: [PATCH] Created SC3008 (markdown)

---
 SC3008.md | 39 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)
 create mode 100644 SC3008.md

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+## In POSIX sh, select loops are undefined.
+
+### Problematic code:
+
+```sh
+#!/bin/sh
+echo "Select file to show"
+select input in *
+do
+  ls -l "$input"
+done
+```
+
+### Correct code:
+
+Either switch to bash:
+
+```sh
+#!/usr/bin/env bash
+echo "Select file to show"
+select input in *
+do
+  ls -l "$input"
+done
+```
+
+Or write your own menu.
+
+### 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. There is no simple substitution for a `select` loop, so either write your own using compatible constructs like `for` loops, or switch to a shell that supports them.
+
+### Exceptions:
+
+None
+
+### Related resources:
+
+* Help by adding links to BashFAQ, StackOverflow, man pages, POSIX, etc!
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