17 lines
731 B
Bash
17 lines
731 B
Bash
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#!/usr/bin/env bash
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# flash.sh — flash stock OpenBSD install ISO to USB
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# Usage: ./flash.sh /dev/sdX
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set -euo pipefail
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DEV="${1:-}"
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[[ -n "$DEV" && -b "$DEV" ]] || { echo "Usage: $0 /dev/sdX"; exit 1; }
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case "$DEV" in /dev/nvme*|/dev/sda|/dev/mmcblk*|/dev/vd*) echo "ERR: refusing internal $DEV" >&2; exit 2;; esac
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URL="https://cdn.openbsd.org/pub/OpenBSD/7.6/amd64/install76.iso"
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ISO=/tmp/install76.iso
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[[ -f "$ISO" ]] || { echo "[*] downloading $URL"; curl -fL -o "$ISO" "$URL"; }
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echo "About to flash $ISO -> $DEV. Type yes:"
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read -r ANS; [[ "$ANS" == "yes" ]] || exit 1
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sudo dd if="$ISO" of="$DEV" bs=4M status=progress conv=fsync oflag=direct
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sudo sync
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sudo eject "$DEV"
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echo "EJECTED — pull, plug into edge box, install"
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