scripts/depmod.sh

   1 #!/bin/sh
   2 # SPDX-License-Identifier: GPL-2.0
   3 #
   4 # A depmod wrapper used by the toplevel Makefile
   5
   6 if test $# -ne 2; then
   7         echo "Usage: $0 /sbin/depmod <kernelrelease>" >&2
   8         exit 1
   9 fi
  10 DEPMOD=$1
  11 KERNELRELEASE=$2
  12
  13 if ! test -r System.map ; then
  14         echo "Warning: modules_install: missing 'System.map' file. Skipping depmod." >&2
  15         exit 0
  16 fi
  17
  18 # legacy behavior: "depmod" in /sbin, no /sbin in PATH
  19 PATH="$PATH:/sbin"
  20 if [ -z $(command -v $DEPMOD) ]; then
  21         echo "Warning: 'make modules_install' requires $DEPMOD. Please install it." >&2
  22         echo "This is probably in the kmod package." >&2
  23         exit 0
  24 fi
  25
  26 # older versions of depmod require the version string to start with three
  27 # numbers, so we cheat with a symlink here
  28 depmod_hack_needed=true
  29 tmp_dir=$(mktemp -d ${TMPDIR:-/tmp}/depmod.XXXXXX)
  30 mkdir -p "$tmp_dir/lib/modules/$KERNELRELEASE"
  31 if "$DEPMOD" -b "$tmp_dir" $KERNELRELEASE 2>/dev/null; then
  32         if test -e "$tmp_dir/lib/modules/$KERNELRELEASE/modules.dep" -o \
  33                 -e "$tmp_dir/lib/modules/$KERNELRELEASE/modules.dep.bin"; then
  34                 depmod_hack_needed=false
  35         fi
  36 fi
  37 rm -rf "$tmp_dir"
  38 if $depmod_hack_needed; then
  39         symlink="$INSTALL_MOD_PATH/lib/modules/99.98.$KERNELRELEASE"
  40         ln -s "$KERNELRELEASE" "$symlink"
  41         KERNELRELEASE=99.98.$KERNELRELEASE
  42 fi
  43
  44 set -- -ae -F System.map
  45 if test -n "$INSTALL_MOD_PATH"; then
  46         set -- "$@" -b "$INSTALL_MOD_PATH"
  47 fi
  48 "$DEPMOD" "$@" "$KERNELRELEASE"
  49 ret=$?
  50
  51 if $depmod_hack_needed; then
  52         rm -f "$symlink"
  53 fi
  54
  55 exit $ret