[archiso] Add checksum= boot param

Signed-off-by: Gerardo Exequiel Pozzi <vmlinuz386@yahoo.com.ar>

archiso/hooks/archiso

@@ -77,6 +77,16 @@ _mnt_sfs() {
     fi
 }
 
+_verify_checksum() {
+    local _status
+    cd "/bootmnt/${archisobasedir}"
+    md5sum -c checksum.md5 > /checksum.log 2>&1
+    _status=$?
+    cd "${OLDPWD}"
+    return ${_status}
+}
+
+
 run_hook() {
     [[ -z "${arch}" ]] && arch="$(uname -m)"
     [[ -z "${cowspace_size}" ]] && cowspace_size="75%"
@@ -135,6 +145,22 @@ archiso_mount_handler() {
         launch_interactive_shell
     fi
 
+    if [[ "${checksum}" == "y" ]]; then
+        if [[ -f "/bootmnt/${archisobasedir}/checksum.md5" ]]; then
+            msg -n ":: Self-test requested, please wait..."
+            if _verify_checksum; then
+                msg "done. Checksum is OK, continue booting."
+            else
+                echo "ERROR: one or more files are corrupted"
+                echo "see /checksum.log for details"
+                launch_interactive_shell
+            fi
+        else
+            echo "ERROR: checksum=y option specified but checksum.md5 not found"
+            launch_interactive_shell
+        fi
+    fi
+
     if [[ "${copytoram}" == "y" ]]; then
         msg -n ":: Mounting /copytoram (tmpfs) filesystem, size=${copytoram_size}..."
         mount -t tmpfs -o "size=${copytoram_size}",mode=0755 copytoram /copytoram

archiso/mkarchiso

@@ -112,6 +112,8 @@ _usage ()
     echo "      includes all specified packages"
     echo "   prepare <dir>"
     echo "      build all images"
+    echo "   checksum <dir>"
+    echo "      make a checksum.md5 for self-test"
     echo "   iso <dir> <image name>"
     echo "      build an iso image from the working dir"
     exit ${1}
@@ -134,6 +136,8 @@ _show_config () {
             ;;
         prepare)
             ;;
+        checksum)
+            ;;
         iso)
             _msg_info "               Image name:   ${img_name}"
             _msg_info "               Disk label:   ${iso_label}"
@@ -286,6 +290,16 @@ _mkfs () {
     _umount_fs "${work_dir}/mnt/${_src}"
 }
 
+command_checksum () {
+    _show_config checksum
+
+    _msg_info "Creating checksum file for self-test"
+    cd "${work_dir}/iso/${install_dir}"
+    find -type f ! -name checksum.md5 -print0 | xargs -0 md5sum > checksum.md5
+    cd ${OLDPWD}
+    _msg_info "Done!"
+}
+
 # Create an ISO9660 filesystem from "iso" directory.
 command_iso () {
     if [[ ! -f "${work_dir}/iso/isolinux/isolinux.bin" ]]; then
@@ -428,6 +442,9 @@ case "${command_name}" in
     prepare)
         command_prepare
         ;;
+    checksum)
+        command_checksum
+        ;;
     iso)
         if [[ $# -lt 3 ]]; then
             _msg_error "No image specified" 0