[presets] add steamos files

presets/steam/steamos/bin/steamos-ls

@@ -0,0 +1,150 @@
+#!/bin/bash
+# -*- mode: sh; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
+# vim: et sts=4 sw=4
+
+#  SPDX-License-Identifier: LGPL-2.1+
+#
+#  Copyright © 2021 Collabora Ltd.
+#  Copyright © 2021 Valve Corporation.
+#
+#  This file is part of steamos-customizations.
+#
+#  steamos-customizations is free software; you can redistribute it and/or
+#  modify it under the terms of the GNU Lesser General Public License as
+#  published by the Free Software Foundation; either version 2.1 of the License,
+#  or (at your option) any later version.
+
+set -e
+set -u
+
+declare -r esp_parttype=c12a7328-f81f-11d2-ba4b-00a0c93ec93b
+declare -r efi_parttype=ebd0a0a2-b9e5-4433-87c0-68b6b72699c7
+declare -r lsblk_cols=PATH,PARTTYPE,PARTUUID,PARTLABEL
+
+MOUNTDIR="${MOUNTDIR:-/mnt}"
+OUTPUTS=("path" "partuuid" "partlabel" "label" "boot-requested-at" "boot-other"
+         "boot-other-disabled" "boot-attempts" "boot-count" "boot-time"
+         "image-invalid" "update" "update-disabled" "update-window-start"
+         "update-window-end" "loader" "partitions" "comment")
+
+usage() {
+    cat <<EOF
+${0##*/} [options] [<device> ...]
+
+List bootconf parameters about SteamOS devices.
+
+Options:
+ -o, --output <list>  output columns
+EOF
+}
+
+opts=()
+while [[ "$#" -ne 0 ]]
+do
+    if [[ "$1" =~ ^(-h|--help)$ ]]
+    then
+        usage
+        exit 0
+    elif [[ "$1" =~ ^(-o|--output)$ ]]
+    then
+        shift
+        if [[ "$1" == "help" ]]
+        then
+            echo "${OUTPUTS[@]}"
+            exit 0
+        fi
+
+        IFS=, read -r -a output <<<"$1"
+    elif [[ "$1" == -- ]]
+    then
+        shift
+        break
+    else
+        opts+=("$1")
+    fi
+    shift
+done
+
+
+esp_path=
+mapfile -t espdev < <(lsblk --noheadings --output $lsblk_cols)
+for dev in  "${espdev[@]}"
+do
+    read -r path parttype partuuid partlabel <<<"$dev"
+    [[ "${parttype:-}" == $esp_parttype ]] || continue
+    # We need this check in case there are other OSes installed with
+    # esp_parttype tagged partitions of their own:
+    [[ "${partlabel:-}" == esp ]] || continue
+    esp_path=$path
+    break
+done
+
+mapfile -t devices < <(lsblk --noheadings --output $lsblk_cols "${opts[@]}" "$@")
+for dev in "${devices[@]}"
+do
+    read -r path parttype partuuid partlabel <<<"$dev"
+    [[ "${parttype:-}" == $efi_parttype ]] || continue
+
+    image_ident=
+    case $partlabel in
+        efi-*)
+            image_ident=${partlabel#efi-};
+            ;;
+    esac
+
+    [[ -n "${image_ident}" ]] || continue;
+
+    if ! mount -oro "$esp_path" ${MOUNTDIR}
+    then
+        echo "Warning: $path: No such mountable device" >&2
+        continue
+    fi
+    trap "umount ${MOUNTDIR}" 0
+
+    cfgs=()
+    if [[ -e "$MOUNTDIR/SteamOS/conf/${image_ident}.conf" ]]
+    then
+        mapfile -t cfgs <"$MOUNTDIR/SteamOS/conf/${image_ident}.conf"
+    fi
+
+    # FIXME: Small delay to avoid umount exiting with EBUSY
+    while ! umount "$MOUNTDIR"
+    do
+        sleep 0.01
+    done 2>/dev/null
+    trap - 0
+
+    [[ "${#cfgs[@]}" -ne 0 ]] || continue
+
+    if [[ ! "${output[@]:-}" ]]
+    then
+        printf "$path@/SteamOS/bootconf: %s\n" "${cfgs[@]}"
+        continue
+    fi
+
+    vals=()
+    cfgs+=("path: $path")
+    cfgs+=("partuuid: $partuuid")
+    cfgs+=("partlabel: $partlabel")
+    for i in "${output[@]}"
+    do
+        val=
+        for cfg in "${cfgs[@]}"
+        do
+            read -r p v <<<"$cfg"
+            p="${p%:}"
+            [[ "$i" == "$p" ]] || continue
+
+            val="$v"
+            break
+        done
+
+        if [[ ! "$val" ]] && [[ "${FS:- }" == " " ]]
+        then
+            val="-"
+        fi
+
+        vals+=("$val")
+    done
+    ( IFS="${FS:- }"; printf "%s" "${vals[*]}"; printf "\n" )
+done