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65 lines
1.8 KiB
65 lines
1.8 KiB
3 years ago
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#!/bin/sh -efu
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# ALT: write Elbrus boot media
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# public domain 2020 Michael Shigorin <mike@altlinux.org>
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# http://altlinux.org/elbrus
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error() { echo "$@" >&2; exit 1; }
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usage() { error "Usage: $0 [-f] /path/to/alt-e2k.iso /dev/sdX1_or_/dev/sr0"; }
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# "yes, this flash drive's filesystem can be overwritten"
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force=
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[ "$1" = "-f" ] && force=1 && shift
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[ $# = 2 ] || usage
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[ -s "$1" ] || usage
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[ -b "$2" ] || usage
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checkuid() { [ "$(id -u)" = 0 ] || error "$0: need to run as root"; }
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format() { mkfs.ext2 -E packed_meta_blocks=1,num_backup_sb=1 -L altinst "$1"; }
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# use a partition block device, not the whole disk one
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checkpart() {
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dev="${1#/dev/}"
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[ -n "$dev" ] || usage
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[ -f "/sys/class/block/$dev/partition" ] || usage
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}
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case "$2" in
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/dev/sr[0-9]*|dvd*|cd*)
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grep -qw "^$2" /proc/mounts && checkuid && umount -v "$2"
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echo "Writing DVD image..."
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growisofs -dvd-compat -Z "$2"="$1"
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;;
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/dev/sd*)
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grep -qw "^$2" /proc/mounts && [ -z "$force" ] && error "$2 mounted"
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checkpart "$2"
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checkuid
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[ "$(blkid -o value -s LABEL "$2")" = "altinst" ] || format "$2"
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src="$(mktemp -d)"
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dst="$(mktemp -d)"
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echo -n "mounting image... "
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mount -o loop,ro "$1" "$src"; echo "done"
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echo -n "mounting drive... "
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mount -o noatime "$2" "$dst"; echo "done"
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echo "copying contents..."
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rsync -Pavc --inplace --delete --numeric-ids "$src/" "$dst/" ||
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cp -avt "$dst" -- "$src"/{.disk,*}
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grep -q "^default=.*_flash$" "$dst/boot.conf" || {
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cur="$(sed -rn 's/^default=(.*)$/\1/p' "$dst/boot.conf")"
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grep -q "^label=${cur}_flash$" "$dst/boot.conf" && {
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echo -n "updating default boot target... "
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sed -i 's,^default=.*$,&_flash,' "$dst/boot.conf"
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echo "done"
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} ||:
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}
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echo -n "unmounting media... "
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umount "$src" "$dst" && rmdir "$src" "$dst"
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echo "done."
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;;
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*)
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usage
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;;
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esac
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