src/kernel-install/90-loaderentry.install

   1 #!/usr/bin/env bash
   2 # -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
   3 # ex: ts=8 sw=4 sts=4 et filetype=sh
   4
   5 COMMAND="$1"
   6 KERNEL_VERSION="$2"
   7 ENTRY_DIR_ABS="$3"
   8 KERNEL_IMAGE="$4"
   9 INITRD_OPTIONS_START="5"
  10
  11 if ! [[ $KERNEL_INSTALL_MACHINE_ID ]]; then
  12     exit 0
  13 fi
  14
  15 if ! [[ -d "$ENTRY_DIR_ABS" ]]; then
  16     exit 0
  17 fi
  18
  19 MACHINE_ID=$KERNEL_INSTALL_MACHINE_ID
  20
  21 BOOT_ROOT=${ENTRY_DIR_ABS%/$MACHINE_ID/$KERNEL_VERSION}
  22 BOOT_MNT=$(stat -c %m $BOOT_ROOT)
  23 ENTRY_DIR=/${ENTRY_DIR_ABS#$BOOT_MNT}
  24
  25 if [[ $COMMAND == remove ]]; then
  26     rm -f "$BOOT_ROOT/loader/entries/$MACHINE_ID-$KERNEL_VERSION.conf"
  27     rm -f "$BOOT_ROOT/loader/entries/$MACHINE_ID-$KERNEL_VERSION+"*".conf"
  28     exit 0
  29 fi
  30
  31 if ! [[ $COMMAND == add ]]; then
  32     exit 1
  33 fi
  34
  35 if ! [[ $KERNEL_IMAGE ]]; then
  36     exit 1
  37 fi
  38
  39 if [[ -f /etc/os-release ]]; then
  40     . /etc/os-release
  41 elif [[ -f /usr/lib/os-release ]]; then
  42     . /usr/lib/os-release
  43 fi
  44
  45 if ! [[ $PRETTY_NAME ]]; then
  46     PRETTY_NAME="Linux $KERNEL_VERSION"
  47 fi
  48
  49 if [[ -f /etc/kernel/cmdline ]]; then
  50     read -r -d '' -a BOOT_OPTIONS < /etc/kernel/cmdline
  51 elif [[ -f /usr/lib/kernel/cmdline ]]; then
  52     read -r -d '' -a BOOT_OPTIONS < /usr/lib/kernel/cmdline
  53 else
  54     declare -a BOOT_OPTIONS
  55
  56     read -r -d '' -a line < /proc/cmdline
  57     for i in "${line[@]}"; do
  58         [[ "${i#initrd=*}" != "$i" ]] && continue
  59         [[ "${i#BOOT_IMAGE=*}" != "$i" ]] && continue
  60         BOOT_OPTIONS+=("$i")
  61     done
  62 fi
  63
  64 if [[ -f /etc/kernel/tries ]]; then
  65     read -r TRIES </etc/kernel/tries
  66     if ! [[ "$TRIES" =~ ^[0-9]+$ ]] ; then
  67         echo "/etc/kernel/tries does not contain an integer." >&2
  68         exit 1
  69     fi
  70     LOADER_ENTRY="$BOOT_ROOT/loader/entries/$MACHINE_ID-$KERNEL_VERSION+$TRIES.conf"
  71 else
  72     LOADER_ENTRY="$BOOT_ROOT/loader/entries/$MACHINE_ID-$KERNEL_VERSION.conf"
  73 fi
  74
  75 cp "$KERNEL_IMAGE" "$ENTRY_DIR_ABS/linux" &&
  76    chown root:root "$ENTRY_DIR_ABS/linux" &&
  77    chmod 0644 "$ENTRY_DIR_ABS/linux" || {
  78     echo "Could not copy '$KERNEL_IMAGE to '$ENTRY_DIR_ABS/linux'." >&2
  79     exit 1
  80 }
  81
  82 INITRD_OPTIONS=( "${@:${INITRD_OPTIONS_START}}" )
  83
  84 for initrd in "${INITRD_OPTIONS[@]}"; do
  85     if [[ -f "${initrd}" ]]; then
  86         initrd_basename="$(basename ${initrd})"
  87         [ "$KERNEL_INSTALL_VERBOSE" -gt 0 ] && \
  88             echo "Installing $ENTRY_DIR_ABS/${initrd_basename}"
  89         cp "${initrd}" "$ENTRY_DIR_ABS/${initrd_basename}" &&
  90             chown root:root "$ENTRY_DIR_ABS/${initrd_basename}" &&
  91             chmod 0644 "$ENTRY_DIR_ABS/${initrd_basename}" || {
  92              echo "Could not copy '${initrd}' to '$ENTRY_DIR_ABS/${initrd_basename}'." >&2
  93              exit 1
  94         }
  95     fi
  96 done
  97
  98 # If no initrd option is supplied, fallback to "initrd" which is
  99 # the name used by dracut when generating it in its kernel-install hook
 100 [[ ${#INITRD_OPTIONS[@]} == 0 ]] && INITRD_OPTIONS=( initrd )
 101
 102 mkdir -p "${LOADER_ENTRY%/*}" || {
 103     echo "Could not create loader entry directory '${LOADER_ENTRY%/*}'." >&2
 104     exit 1
 105 }
 106
 107 [ "$KERNEL_INSTALL_VERBOSE" -gt 0 ] && \
 108     echo "Creating $LOADER_ENTRY"
 109 {
 110     echo "title      $PRETTY_NAME"
 111     echo "version    $KERNEL_VERSION"
 112     echo "machine-id $MACHINE_ID"
 113     echo "options    ${BOOT_OPTIONS[*]}"
 114     echo "linux      $ENTRY_DIR/linux"
 115     for initrd in "${INITRD_OPTIONS[@]}"; do
 116         [[ -f $ENTRY_DIR_ABS/$(basename ${initrd}) ]] && \
 117             echo "initrd     $ENTRY_DIR/$(basename ${initrd})"
 118     done
 119     :
 120 } > "$LOADER_ENTRY" || {
 121     echo "Could not create loader entry '$LOADER_ENTRY'." >&2
 122     exit 1
 123 }
 124 exit 0