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@@ -0,0 +1,70 @@
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+#!/bin/sh
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+# Parameters:
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+# $1 = source dir
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+# $2 = dst dir
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+# $top_builddir = well you guessed it
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+
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+die_if_not_dir()
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+{
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+ for dir in "$@"; do
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+ test -d "$dir" && continue
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+ echo "Error: '$dir' is not a directory"
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+ exit 1
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+ done
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+}
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+
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+
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+# Ensure that created dirs/files have 755/644 perms
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+umask 022
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+
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+
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+# Sanity tests
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+die_if_not_dir "$1"
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+mkdir -p "$2" 2>/dev/null
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+die_if_not_dir "$2"
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+die_if_not_dir "$top_builddir"
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+
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+
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+# Just copy (no sanitization) some kernel headers.
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+eval `grep ^KERNEL_HEADERS "$top_builddir/.config"`
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+if ! test "$KERNEL_HEADERS" \
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+|| ! test -d "$KERNEL_HEADERS/asm" \
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+|| ! test -d "$KERNEL_HEADERS/asm-generic" \
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+|| ! test -d "$KERNEL_HEADERS/linux" \
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+; then
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+ echo "Error: '$KERNEL_HEADERS' is not a directory containing kernel headers."
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+ echo "Check KERNEL_HEADERS= in your .config file."
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+ exit 1
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+fi
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+# Do the copying only if src and dst dirs are not the same.
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+# Be thorough: do not settle just for textual compare,
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+# and guard against "pwd" being handled as shell builtin.
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+# Double quoting looks weird, but it works (even bbox ash too).
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+if test "`(cd "$KERNEL_HEADERS"; env pwd)`" != "`(cd "$2"; env pwd)`"; then
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+ # NB: source or target files and directories may be symlinks,
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+ # and for all we know, good reasons.
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+ # We must work correctly in these cases. This includes "do not replace
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+ # target symlink with real directory" rule. So, no rm -rf here please.
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+ mkdir -p "$2/asm" 2>/dev/null
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+ mkdir -p "$2/asm-generic" 2>/dev/null
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+ mkdir -p "$2/linux" 2>/dev/null
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+ # Exists, but is not a dir? That's bad, bail out
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+ die_if_not_dir "$2/asm" "$2/asm-generic" "$2/linux"
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+ # cp -HL creates regular destination files even if sources are symlinks.
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+ # This is intended.
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+ # (NB: you need busybox 1.11.x for this. earlier ones are slightly buggy)
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+ cp -RHL "$KERNEL_HEADERS/asm"/* "$2/asm" || exit 1
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+ cp -RHL "$KERNEL_HEADERS/asm-generic"/* "$2/asm-generic" || exit 1
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+ cp -RHL "$KERNEL_HEADERS/linux"/* "$2/linux" || exit 1
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+ if ! test -f "$2/linux/version.h"; then
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+ echo "Warning: '$KERNEL_HEADERS/linux/version.h' is not found"
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+ echo "in kernel headers directory specified in .config."
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+ echo "Some programs won't like that. Consider fixing it by hand."
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+ fi
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+fi
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+
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+
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+# Fix mode/owner bits
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+cd "$2" || exit 1
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+chmod -R u=rwX,go=rX . >/dev/null 2>&1
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+chown -R `id | sed 's/^uid=\([0-9]*\).*gid=\([0-9]*\).*$/\1:\2/'` . >/dev/null 2>&1
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Denis Vlasenko