[arch-releng] [RFC] [PATCH] [archiso] Add checksum= boot param

Gerardo Exequiel Pozzi vmlinuz386 at yahoo.com.ar
Thu Aug 11 23:26:36 EDT 2011


NOTE 1: Needs md5sum, not added here.
 Option 1: Use md5sum from coreutils.
 Option 2: Use md5sum from mkinitcpio-busybox (currently is not builded).

NOTE 2: This is a draft without testing, but should works.

Signed-off-by: Gerardo Exequiel Pozzi <vmlinuz386 at yahoo.com.ar>
---
 README                    |    4 ++++
 archiso/hooks/archiso     |   15 +++++++++++++++
 archiso/mkarchiso         |   15 +++++++++++++++
 configs/baseline/build.sh |    1 +
 configs/releng/build.sh   |    2 ++
 5 files changed, 37 insertions(+), 0 deletions(-)

diff --git a/README b/README
index 09765fb..26be787 100644
--- a/README
+++ b/README
@@ -31,6 +31,10 @@ INDEX
 * copytoram=        If set to "y" or just "copytoram" without arguments,
                     all SquashFS are copied to "RAM".
                     Default: (unset)
+* checksum=         If set to "y" or just "checksum" without arguments,
+                    performs a self-test of all files inside ${install_dir},
+                    and continue booting if ok.
+                    Default: (unset)
 * cowspace_size=    Set the size of tmpfs /cowspace. This space is used for
                     Copy-On-Write files of dm-snapshot.
                     (directory not visible outside initramfs)
diff --git a/archiso/hooks/archiso b/archiso/hooks/archiso
index 66dbafd..fb817b2 100644
--- a/archiso/hooks/archiso
+++ b/archiso/hooks/archiso
@@ -135,6 +135,21 @@ archiso_mount_handler() {
         launch_interactive_shell
     fi
 
+    if [[ "${checksum}" == "y" ]]; then
+        if [[ -f "/bootmnt/${archisobasedir}/checksum.md5" ]]; then
+            echo ":: Self-test requested, please wait..."
+            if md5sum -c "/bootmnt/${archisobasedir}/checksum.md5" > /checksum.log 2>&1; then
+                echo "done. Checksum is OK, continue booting."
+            else
+                echo "ERROR: one or more files are wrong, see /checksum.log for details"
+                launch_interactive_shell
+            fi
+        else
+            echo "ERROR: checksum=y option specified but checksum.md5 not found"
+            launch_interactive_shell
+        fi
+    fi
+
     if [[ "${copytoram}" == "y" ]]; then
         msg -n ":: Mounting /copytoram (tmpfs) filesystem, size=${copytoram_size}..."
         mount -t tmpfs -o "size=${copytoram_size}",mode=0755 copytoram /copytoram
diff --git a/archiso/mkarchiso b/archiso/mkarchiso
index 12d8936..e4a85eb 100755
--- a/archiso/mkarchiso
+++ b/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:   ${iso_label}"
@@ -286,6 +290,14 @@ _mkfs () {
     _umount_fs "${work_dir}/mnt/${_src}"
 }
 
+command_checksum () {
+    _show_config checksum
+
+    _msg_info "Creating checksum file for self-test"
+    find "${work_dir}/iso/${install_dir}" -print0 | xargs -0 md5sum > "${work_dir}/iso/${install_dir}/checksum.md5"
+    _msg_info "Done!"
+}
+
 # Create an ISO9660 filesystem from "iso" directory.
 command_iso () {
     if [[ ! -f "${work_dir}/iso/isolinux/isolinux.bin" ]]; then
@@ -428,6 +440,9 @@ case "${command_name}" in
     prepare)
         command_prepare
         ;;
+    checksum)
+        command_checksum
+        ;;
     iso)
         if [[ $# -lt 3 ]]; then
             _msg_error "No image specified" 0
diff --git a/configs/baseline/build.sh b/configs/baseline/build.sh
index a07599c..eabe21f 100755
--- a/configs/baseline/build.sh
+++ b/configs/baseline/build.sh
@@ -86,6 +86,7 @@ make_prepare() {
 
 # Build ISO
 make_iso() {
+    mkarchiso ${verbose} checksum "${work_dir}"
     mkarchiso ${verbose} -D "${install_dir}" -L "${iso_label}" iso "${work_dir}" "${name}-${version}-${arch}.iso"
 }
 
diff --git a/configs/releng/build.sh b/configs/releng/build.sh
index 284ab76..22229ce 100755
--- a/configs/releng/build.sh
+++ b/configs/releng/build.sh
@@ -163,6 +163,7 @@ make_prepare() {
 # args: $1 (core | netinstall)
 make_iso() {
     local _iso_type=${1}
+    mkarchiso ${verbose} checksum "${work_dir}"
     mkarchiso ${verbose} -D "${install_dir}" -L "${iso_label}" iso "${work_dir}" "${name}-${version}-${_iso_type}-${arch}.iso"
 }
 
@@ -206,6 +207,7 @@ make_dual() {
             sed "s|%ARCHISO_LABEL%|${iso_label}|g;
                  s|%INSTALL_DIR%|${install_dir}|g" ${_cfg} > ${work_dir}/dual/iso/${install_dir}/boot/syslinux/${_cfg##*/}
         done
+        mkarchiso ${verbose} checksum "${work_dir}/dual"
         mkarchiso ${verbose} -D "${install_dir}" -L "${iso_label}" iso "${work_dir}/dual" "${name}-${version}-${_iso_type}-dual.iso"
         : > ${work_dir}/dual/build.${FUNCNAME}_${_iso_type}
     fi
-- 
1.7.6



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