lxsh/generate_shellcode.sh

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#!/bin/sh
file=include/g_shellcode.h
tmpfile=${TMPDIR-/tmp}/lxsh_shellcodegen
codedir=shellcode
# $1 = file
minify() {
if which lxsh >/dev/null 2>&1 ; then
lxsh -m "$1"
elif which shfmt >/dev/null 2>&1 ; then
shfmt -mn "$1"
else
cat "$1"
fi
}
to_cstr() {
sed 's|\\|\\\\|g;s|\"|\\\"|g' | sed ':a;N;$!ba;s/\n/\\n/g;'
}
cat > "$tmpfile" << EOF
#ifndef G_VERSION_H
#define G_VERSION_H
EOF
unset all_fields
for I in "$codedir"/*.sh
do
field=$(basename "$I" | tr [:lower:] [:upper:] | tr '.' '_')
all_fields="$all_fields $field"
printf '#define %s "%s\\n"\n' "$field" "$(minify "$I" | to_cstr)" >> "$tmpfile"
done
echo "#endif" >> "$tmpfile"
if [ "$(md5sum "$tmpfile" | cut -d' ' -f1)" != "$(md5sum "$file" | cut -d' ' -f1)" ] ; then
mv "$tmpfile" "$file"
else
rm "$tmpfile"
fi