1 files changed, 68 insertions, 0 deletions
diff --git a/modules.d/99squash/module-setup.sh b/modules.d/99squash/module-setup.sh
new file mode 100755
index 0000000..dc2e0a2
--- /dev/null
+++ b/modules.d/99squash/module-setup.sh
@@ -0,0 +1,68 @@
+#!/bin/bash
+
+check() {
+    require_binaries mksquashfs unsquashfs || return 1
+    require_kernel_modules squashfs loop overlay || return 1
+
+    return 255
+}
+
+depends() {
+    echo "systemd-initrd"
+    return 0
+}
+
+installpost() {
+    local _busybox
+    _busybox=$(find_binary busybox)
+
+    # Move everything under $initdir except $squash_dir
+    # itself into squash image
+    for i in "$initdir"/*; do
+        [[ $squash_dir == "$i"/* ]] || mv "$i" "$squash_dir"/
+    done
+
+    # Create mount points for squash loader
+    mkdir -p "$initdir"/squash/
+    mkdir -p "$squash_dir"/squash/
+
+    # Copy dracut spec files out side of the squash image
+    # so dracut rebuild and lsinitrd can work
+    for file in "$squash_dir"/usr/lib/dracut/*; do
+        [[ -f $file ]] || continue
+        DRACUT_RESOLVE_DEPS=1 dracutsysrootdir="$squash_dir" inst "${file#"$squash_dir"}"
+    done
+
+    # Install required modules and binaries for the squash image init script.
+    if [[ $_busybox ]]; then
+        inst "$_busybox" /usr/bin/busybox
+        for _i in sh echo mount modprobe mkdir switch_root grep umount; do
+            ln_r /usr/bin/busybox /usr/bin/$_i
+        done
+    else
+        DRACUT_RESOLVE_DEPS=1 inst_multiple sh mount modprobe mkdir switch_root grep umount
+
+        # libpthread workaround: pthread_cancel wants to dlopen libgcc_s.so
+        inst_libdir_file -o "libgcc_s.so*"
+
+        # FIPS workaround for Fedora/RHEL: libcrypto needs libssl when FIPS is enabled
+        [[ $DRACUT_FIPS_MODE ]] && inst_libdir_file -o "libssl.so*"
+    fi
+
+    hostonly="" instmods "loop" "squashfs" "overlay"
+    dracut_kernel_post
+
+    # Install squash image init script.
+    ln_r /usr/bin /bin
+    ln_r /usr/sbin /sbin
+    inst_simple "$moddir"/init-squash.sh /init
+
+    # make sure that library links are correct and up to date for squash loader
+    build_ld_cache
+}
+
+install() {
+    if [[ $DRACUT_SQUASH_POST_INST ]]; then
+        installpost
+    fi
+}