From 354b24ff32c66e2f4a6e989ccaf1a035f85c129a Mon Sep 17 00:00:00 2001
From: P. J. McDermott <pj@pehjota.net>
Date: Mon, 21 Jul 2014 13:17:48 -0400
Subject: installers/pc: Prompt for block device

---
diff --git a/installers/pc.sh b/installers/pc.sh
index 52525e2..a9f5898 100755
--- a/installers/pc.sh
+++ b/installers/pc.sh
@@ -45,6 +45,10 @@ main()
 	host_arch="${host_arch}-${install_arch#*-}"
 	check_arch_compat "${install_arch}" "${host_arch}"
 
+	printf '\nSelect a block device'
+	printf '\n=====================\n\n'
+	dev="$(prompt_block_dev)"
+
 	printf '\nInstalling base system'
 	printf '\n======================\n\n'
 
@@ -177,4 +181,77 @@ check_arch_compat()
 	fi
 }
 
+pretty_print_size_dec()
+{
+	local size="${1}"
+
+	awk -v size=${size} 'BEGIN {
+		split("B KB MB GB TB", units, " ");
+		i=1;
+		while (size >= 1000) {
+			size /= 1000;
+			++i;
+		};
+		printf("%.2f %s\n", size, units[i]); }'
+}
+
+pretty_print_size_bin()
+{
+	local size="${1}"
+
+	awk -v size=${size} 'BEGIN {
+		split("B KiB MiB GiB TiB", units, " ");
+		i=1;
+		while (size >= 1024) {
+			size /= 1024;
+			++i;
+		};
+		printf("%.2f %s\n", size, units[i]); }'
+}
+
+prompt_block_dev()
+{
+	local dev=
+	local vendor=
+	local model=
+	local name=
+	local size=
+	local size_s=
+	local desc=
+	local devs=
+
+	set --
+	for dev in /sys/block/*; do
+		dev="${dev#/sys/block/}"
+		case "${dev}" in
+			loop*|sr*) continue;;
+		esac
+		if [ -e "/sys/block/${dev}/device/vendor" ]; then
+			vendor="$(cat "/sys/block/${dev}/device/vendor")"
+			model="$(cat "/sys/block/${dev}/device/model")"
+			name="${vendor} ${model}"
+		else
+			name="$(cat "/sys/block/${dev}/device/name")"
+		fi
+		size="$(cat "/sys/block/${dev}/size")"
+		size="$(expr ${size} \* 512)"
+		size_s="$(pretty_print_size_dec "${size}")"
+		size_s="${size_s} ($(pretty_print_size_bin "${size}"))"
+		desc="$(printf '%s (%s) - %s\n' "${name}" "${dev}" "${size_s}")"
+		set -- "${@}" "${desc}"
+		devs="$(printf '%s\n%s\t%s\n' "${devs}" "${desc}" "${dev}")"
+	done
+
+	printf 'Select a block device:\n' >&2
+	_select "${@}"
+
+	while IFS='	' read -r desc dev; do
+		if [ "x${desc}" = "x${select_result}" ]; then
+			printf '%s\n' "${dev}"
+		fi
+	done <<-EOF
+		${devs}
+		EOF
+}
+
 main "${@}"
--
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