scripts/depmod.sh

   1 #!/bin/sh
   2 #
   3 # A depmod wrapper used by the toplevel Makefile
   4
   5 if test $# -ne 3; then
   6         echo "Usage: $0 /sbin/depmod <kernelrelease> <symbolprefix>" >&2
   7         exit 1
   8 fi
   9 DEPMOD=$1
  10 KERNELRELEASE=$2
  11 SYMBOL_PREFIX=$3
  12
  13 if ! test -r System.map ; then
  14         exit 0
  15 fi
  16
  17 if [ -z $(command -v $DEPMOD) ]; then
  18         echo "Warning: 'make modules_install' requires $DEPMOD. Please install it." >&2
  19         echo "This is probably in the kmod package." >&2
  20         exit 0
  21 fi
  22
  23 # older versions of depmod don't support -P <symbol-prefix>
  24 # support was added in module-init-tools 3.13
  25 if test -n "$SYMBOL_PREFIX"; then
  26         release=$("$DEPMOD" --version)
  27         package=$(echo "$release" | cut -d' ' -f 1)
  28         if test "$package" = "module-init-tools"; then
  29                 version=$(echo "$release" | cut -d' ' -f 2)
  30                 later=$(printf '%s\n' "$version" "3.13" | sort -V | tail -n 1)
  31                 if test "$later" != "$version"; then
  32                         # module-init-tools < 3.13, drop the symbol prefix
  33                         SYMBOL_PREFIX=""
  34                 fi
  35         fi
  36         if test -n "$SYMBOL_PREFIX"; then
  37                 SYMBOL_PREFIX="-P $SYMBOL_PREFIX"
  38         fi
  39 fi
  40
  41 # older versions of depmod require the version string to start with three
  42 # numbers, so we cheat with a symlink here
  43 depmod_hack_needed=true
  44 tmp_dir=$(mktemp -d ${TMPDIR:-/tmp}/depmod.XXXXXX)
  45 mkdir -p "$tmp_dir/lib/modules/$KERNELRELEASE"
  46 if "$DEPMOD" -b "$tmp_dir" $KERNELRELEASE 2>/dev/null; then
  47         if test -e "$tmp_dir/lib/modules/$KERNELRELEASE/modules.dep" -o \
  48                 -e "$tmp_dir/lib/modules/$KERNELRELEASE/modules.dep.bin"; then
  49                 depmod_hack_needed=false
  50         fi
  51 fi
  52 rm -rf "$tmp_dir"
  53 if $depmod_hack_needed; then
  54         symlink="$INSTALL_MOD_PATH/lib/modules/99.98.$KERNELRELEASE"
  55         ln -s "$KERNELRELEASE" "$symlink"
  56         KERNELRELEASE=99.98.$KERNELRELEASE
  57 fi
  58
  59 set -- -ae -F System.map
  60 if test -n "$INSTALL_MOD_PATH"; then
  61         set -- "$@" -b "$INSTALL_MOD_PATH"
  62 fi
  63 "$DEPMOD" "$@" "$KERNELRELEASE" $SYMBOL_PREFIX
  64 ret=$?
  65
  66 if $depmod_hack_needed; then
  67         rm -f "$symlink"
  68 fi
  69
  70 exit $ret