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content/blog/quickbashargcount.md

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+---
+title: "Quick Bash: Check Argument Count"
+date: 2020-12-15T09:25:11-05:00
+draft: false
+tags: ["bash"]
+---
+
+I've been writing more bash scripts recently and I noticed that I often check for the number of arguments before validating them in my scripts. I'll share that small snippet here for my future self.
+
+```bash
+#!/bin/sh
+
+set -o errexit
+set -o nounset
+set -o pipefail
+
+show_usage() {
+    echo "Usage: script [arg1]"
+    exit 1
+}
+
+# Check argument count
+if [ "$#" -ne 1 ]; then
+    show_usage
+fi
+
+```