From 7733a6e1ec89ec346b9bf7bbb4fbcf6660aed313 Mon Sep 17 00:00:00 2001
From: Stanislav Ochotnicky <sochotnicky@gmail.com>
Date: Wed, 12 Aug 2009 20:00:08 +0200
Subject: Added -m switch to mktinderbox chroot

This makes modifications and updates of base_chroot easier.
---
 util/mktinderboxchroot.sh | 76 +++++++++++++++++++++++++++++------------------
 1 file changed, 47 insertions(+), 29 deletions(-)

diff --git a/util/mktinderboxchroot.sh b/util/mktinderboxchroot.sh
index 8b36554..fd909f0 100755
--- a/util/mktinderboxchroot.sh
+++ b/util/mktinderboxchroot.sh
@@ -21,7 +21,7 @@ help()
     echo "   -c                 force clean BASE_CHROOT if it exists and start over from scratch"
     echo "   -p PORTAGE_DIR     directory where portage is (default is /usr/portage)"
     echo "   -s STAGE_FILE      stage file used to create base chroot directory"
-    
+    echo "   -m                 prepare mounts and chroot to BASE_CHROOT for its modification (update)"
     exit 1
 }
 
@@ -29,13 +29,7 @@ clean_work_chroot()
 {
     echo -n "Cleaning work chroot..."
     if [ -d $WORK_CHROOT ];then
-        for dir in {"PKGDIR","DISTDIR"};do
-            umount_dir $dir
-        done
-        for dir in $WORK_CHROOT/{"/dev","/proc","/sys","$PORTAGE_DIR"};do
-            umount "$dir" || umount -l "$dir"
-        done
-
+        umount_all_dirs $WORK_CHROOT
         rm -rf --one-file-system "$WORK_CHROOT"
     fi
     echo Done
@@ -53,6 +47,36 @@ clean_base_chroot()
     echo Done
 }
 
+mount_all_dirs()
+{
+    ROOTDIR=$1
+    echo -n "Mounting filesystems..."
+    mount -t proc none "$ROOTDIR/proc"
+    mount -o bind /dev "$ROOTDIR/dev"
+    mount -o bind /sys "$ROOTDIR/sys"
+
+    mkdir -p "$ROOTDIR/$PORTAGE_DIR"
+    mount -o bind "$PORTAGE_DIR" "$ROOTDIR/$PORTAGE_DIR"
+    # this is bug/issue with current kernels, ro binds don't work so we have to remount
+    mount -o remount,ro "$ROOTDIR/usr/portage"
+
+
+    mount_dir "DISTDIR" $ROOTDIR
+    mount_dir "PKGDIR" $ROOTDIR
+    echo Done
+}
+
+umount_all_dirs()
+{
+    ROOTDIR=$1
+    for dir in {"PKGDIR","DISTDIR"};do
+        umount_dir $dir $ROOTDIR
+    done
+    for dir in $ROOTDIR/{"/dev","/proc","/sys","$PORTAGE_DIR"};do
+        umount "$dir" || umount -l "$dir"
+    done
+}
+
 GPSRET=""
 get_portage_setting()
 {
@@ -78,13 +102,14 @@ get_portage_setting()
 
 mount_dir()
 {
+    ROOTDIR=$2
     get_portage_setting $1
     if [ $? -eq 0 ];then
         if [ ! -e "$GPSRET" ];then
             mkdir -p "$GPSRET"
         fi
-        mkdir -p "$WORK_CHROOT/$GPSRET"
-        mount -o bind "$GPSRET" "$WORK_CHROOT/$GPSRET"
+        mkdir -p "$ROOTDIR/$GPSRET"
+        mount -o bind "$GPSRET" "$ROOTDIR/$GPSRET"
     else
         echo "Unable to get setting for $1 variable"
         exit 1
@@ -93,18 +118,20 @@ mount_dir()
 
 umount_dir()
 {
+    ROOTDIR=$2
     get_portage_setting $1
-    umount "$WORK_CHROOT/$GPSRET" || umount -l "$WORK_CHROOT/$GPSRET"
+    umount "$ROOTDIR/$GPSRET" || umount -l "$ROOTDIR/$GPSRET"
 }
 
 FORCE_CLEAN_BASE=0
 
-while getopts "p:s:c" Option
+while getopts "p:s:cm" Option
 do
   case $Option in
     p ) PORTAGE_DIR="$OPTARG";;
     s ) STAGE_TARBALL="$OPTARG";;
     c ) FORCE_CLEAN_BASE=1;;
+    m ) MODIFY_BASE_CHROOT=1;;
     * ) echo "Unimplemented option chosen.";;   # DEFAULT
   esac
 done
@@ -162,6 +189,13 @@ else
 
 fi
 
+if [ $MODIFY_BASE_CHROOT -eq 1 ];then
+    mount_all_dirs $BASE_CHROOT
+    chroot $BASE_CHROOT /bin/bash
+    umount_all_dirs $BASE_CHROOT
+    exit 0;
+fi
+
 if [ ! -f "$BASE_CHROOT.tar" ];then
     echo -n "Creating tar from $BASE_CHROOT..."
     tar cf "$BASE_CHROOT.tar" -C "$BASE_CHROOT" .
@@ -185,24 +219,8 @@ fi
 echo Done
 
 
+mount_all_dirs $WORK_CHROOT
 
-echo -n "Mounting filesystems..."
-mount -t proc none "$WORK_CHROOT/proc"
-mount -o bind /dev "$WORK_CHROOT/dev"
-mount -o bind /sys "$WORK_CHROOT/sys"
-
-mkdir -p "$WORK_CHROOT/usr/portage"
-mount -o bind "$PORTAGE_DIR" "$WORK_CHROOT/usr/portage"
-# this is bug/issue with current kernels, ro binds don't work so we have to remount
-mount -o remount,ro "$WORK_CHROOT/usr/portage"
-
-
-mount_dir "DISTDIR"
-mount_dir "PKGDIR"
-
-
-
-echo Done
 
 
 echo -n "Chrooting and updating env..."
-- 
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