linux/scripts/depmod.sh
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   1#!/bin/sh
   2#
   3# A depmod wrapper used by the toplevel Makefile
   4
   5if test $# -ne 3; then
   6        echo "Usage: $0 /sbin/depmod <kernelrelease> <symbolprefix>" >&2
   7        exit 1
   8fi
   9DEPMOD=$1
  10KERNELRELEASE=$2
  11SYMBOL_PREFIX=$3
  12
  13if ! test -r System.map -a -x "$DEPMOD"; then
  14        exit 0
  15fi
  16
  17# older versions of depmod don't support -P <symbol-prefix>
  18# support was added in module-init-tools 3.13
  19if 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 $SYMBOL_PREFIX"
  32        fi
  33fi
  34
  35# older versions of depmod require the version string to start with three
  36# numbers, so we cheat with a symlink here
  37depmod_hack_needed=true
  38tmp_dir=$(mktemp -d ${TMPDIR:-/tmp}/depmod.XXXXXX)
  39mkdir -p "$tmp_dir/lib/modules/$KERNELRELEASE"
  40if "$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/$KERNELRELEASE/modules.dep.bin"; then
  43                depmod_hack_needed=false
  44        fi
  45fi
  46rm -rf "$tmp_dir"
  47if $depmod_hack_needed; then
  48        symlink="$INSTALL_MOD_PATH/lib/modules/99.98.$KERNELRELEASE"
  49        ln -s "$KERNELRELEASE" "$symlink"
  50        KERNELRELEASE=99.98.$KERNELRELEASE
  51fi
  52
  53set -- -ae -F System.map
  54if test -n "$INSTALL_MOD_PATH"; then
  55        set -- "$@" -b "$INSTALL_MOD_PATH"
  56fi
  57"$DEPMOD" "$@" "$KERNELRELEASE" $SYMBOL_PREFIX
  58ret=$?
  59
  60if $depmod_hack_needed; then
  61        rm -f "$symlink"
  62fi
  63
  64exit $ret
  65
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