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Shell interpolation is hard, let's use a function!

Trying to get shell interpolation of a multi-word command to work when faced
with some parts of that having spaces is madness.  We did that with busybox
execution using the guest tools, though, since it worked OK in simple cases.

This replaces that with a function that encapsulates the same behaviour in a
much saner fashion.  Now you can run the guest busybox from a 64-bit host
while in a working directory that contains spaces.

Tomorrow the world!

Signed-off-by: Daniel Pittman <>
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1 parent b4ac003 commit b5f3f334a6f2dd16ad01f844685c0ce839bad01a @daniel-pittman daniel-pittman committed Dec 20, 2012
Showing with 10 additions and 5 deletions.
  1. +10 −5 iso-build-files/
15 iso-build-files/
@@ -1,4 +1,4 @@
. ./
# bring in the git derived version number...
@@ -41,9 +41,14 @@ fi
# This invocation is enough to run the guest Busybox on a 32-bit or 64-bit
# kernel, without needing to depend on host libraries matching the guest, or
# chroot, or anything super-fancy like that.
-BUSYBOX="${BUSYBOX} $PWD/tmp/lib/ $PWD/tmp/bin/busybox"
-if ! ${BUSYBOX} true; then
+busybox() {
+ env LD_LIBRARY_PATH="${PWD}/tmp/lib:${LD_LIBRARY_PATH}" \
+ "${PWD}/tmp/lib/" "${PWD}/tmp/bin/busybox" \
+ "$@"
+if ! busybox true; then
echo "It looks like I can't Unable to locate a working busybox for depmod!"
echo "I tried the TCL busybox too, and it failed even with chroot."
echo "If you see 'No such file or directory' above you probably need to install"
@@ -71,7 +76,7 @@ rm -f tmp/lib/modules/${kernelver}/kernel.tclocal
ln -s ../../../usr/local/lib/modules/${kernelver}/kernel \
-${BUSYBOX} depmod -a -b "${DIR_NAME}/tmp" ${kernelver}
+busybox depmod -a -b "${DIR_NAME}/tmp" ${kernelver}
/sbin/ldconfig -r "${DIR_NAME}/tmp"
# build the new core.gz file (containing the contents of the tmp directory)

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