Quick Bash: Check Argument Count
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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.
#!/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