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=$3
  12
  13 if ! test -r System.map -a -x "$DEPMOD"; then
  14         exit 0
  15 fi
  16
  17 # older versions of depmod don't support -P <symbol-prefix>
  18 # support was added in module-init-tools 3.13
  19 if test -n "$SYMBOL_PREFIX"; then
  20         release=$("$DEPMOD" --version)
  21         package=$(echo "$release" | cut -d' ' -f 1)
  22         if test "$package" = "module-init-tools"; then
  23                 version=$(echo "$release" | cut -d' ' -f 2)
  24                 later=$(printf '%s\n' "$version" "3.13" | sort -V | tail -n 1)
  25                 if test "$later" != "$version"; then
  26                         # module-init-tools < 3.13, drop the symbol prefix
  27                         SYMBOL_PREFIX=""
  28                 fi
  29         fi
  30         if test -n "$SYMBOL_PREFIX"; then
  31                 SYMBOL_PREFIX="-P $SYMBOL_PREFIX"
  32         fi
  33 fi
  34
  35 # older versions of depmod require the version string to start with three
  36 # numbers, so we cheat with a symlink here
  37 depmod_hack_needed=true
  38 tmp_dir=$(mktemp -d ${TMPDIR:-/tmp}/depmod.XXXXXX)
  39 mkdir -p "$tmp_dir/lib/modules/$KERNELRELEASE"
  40 if "$DEPMOD" -b "$tmp_dir" $KERNELRELEASE 2>/dev/null; then
  41         if test -e "$tmp_dir/lib/modules/$KERNELRELEASE/modules.dep" -o \
  42                 -e "$tmp_dir/lib/modules/$KERNELRELEASE/modules.dep.bin"; then
  43                 depmod_hack_needed=false
  44         fi
  45 fi
  46 rm -rf "$tmp_dir"
  47 if $depmod_hack_needed; then
  48         symlink="$INSTALL_MOD_PATH/lib/modules/99.98.$KERNELRELEASE"
  49         ln -s "$KERNELRELEASE" "$symlink"
  50         KERNELRELEASE=99.98.$KERNELRELEASE
  51 fi
  52
  53 set -- -ae -F System.map
  54 if test -n "$INSTALL_MOD_PATH"; then
  55         set -- "$@" -b "$INSTALL_MOD_PATH"
  56 fi
  57 "$DEPMOD" "$@" "$KERNELRELEASE" $SYMBOL_PREFIX
  58 ret=$?
  59
  60 if $depmod_hack_needed; then
  61         rm -f "$symlink"
  62 fi
  63
  64 exit $ret