From ef7e29326b258de2dbe14d95b7029d3d9c9c2740 Mon Sep 17 00:00:00 2001
From: James Meyer <james.meyer@operamail.com>
Date: Wed, 15 Oct 2008 17:58:39 -0700
Subject: Major changes to the enter_dev_chroot.sh script.

---
 setup_env.sh                  |   7 +-
 templates/enter_dev_chroot.sh | 313 +++++++++++++++++++-----------------------
 2 files changed, 143 insertions(+), 177 deletions(-)
 mode change 100644 => 100755 templates/enter_dev_chroot.sh

diff --git a/setup_env.sh b/setup_env.sh
index 85a5ad8..1a1972a 100755
--- a/setup_env.sh
+++ b/setup_env.sh
@@ -101,12 +101,15 @@ then
 fi
 
 #create custom enter_dev_chroot.sh script
-sed -e "s/REPLACEME/$ARCH/g" templates/enter_dev_chroot.sh > ../enter_dev_chroot.$ARCH.sh
+#sed -e "s/REPLACEME/$ARCH/g" templates/enter_dev_chroot.sh > ../enter_dev_chroot.$ARCH.sh
+DIR=$(pwd) ; DIR=${DIR##*/}
+ln -s $DIR/templates/enter_dev_chroot.sh ../enter_dev_chroot.$ARCH
+
 chmod 755 ../enter_dev_chroot.$ARCH.sh
 echo "********************************************************"
 echo "**    To enter the chroot (build_root.$ARCH) run:    **"
 echo "**         cd ..                                     **"
-echo "**          ./enter_dev_chroot.$ARCH.sh              **"
+echo "**            ./enter_dev_chroot.$ARCH               **"
 echo "********************************************************"
 
 
diff --git a/templates/enter_dev_chroot.sh b/templates/enter_dev_chroot.sh
old mode 100644
new mode 100755
index 1bf957b..1e3160c
--- a/templates/enter_dev_chroot.sh
+++ b/templates/enter_dev_chroot.sh
@@ -1,179 +1,142 @@
 #!/bin/bash
-MYDIR=`pwd`
-BROOT=$MYDIR/build_root.REPLACEME
-MIRROR_DIR=$MYDIR/pkg_repo
-TOOLS_DIR='LinHES-dev'
-ARCH=REPLACEME
-
-
-
-# Make sure only root can run our script
-if [[ $EUID -ne 0 ]]; then
-   echo "This script must be run as root" 1>&2
-   exit 1
-fi
-
-
-
-if [ ! -d $BROOT ]
-then
-	echo "build_root directory not found"
-	exit 1
-fi
-
-
-
-if [ -d LinHES-PKGBUILD ]
-    then
-        echo "Found LinHES-PKGBUILD"
-    else
-        echo "***********************************************************************************************"
-        echo "* Couldn't find LinHES-PKGBUILD                                                               *"
-        echo "* Please checkout the repository into the current directory                                   *"
-        echo "* The LinHES-PKGBUILD git repoistory is at knoppmyth.net/mount/repository/LinHES-PKGBUILD.git *"
-        echo "***********************************************************************************************"
-        exit 1
-    fi
-
-mounted=`mount`
-umountlist=" "
-
-
-
-echo $mounted | grep -q $BROOT/proc
-status=$?
-if [  ! status = 0 ]
-then
-	mount -t proc proc $BROOT/proc
-    umountlist="$umountlist proc"
-else
-	echo "proc alredy mounted"
-fi
-
-
-
-
-echo $mounted | grep -q $BROOT/sys
-status=$?
-if [ ! $status = 0 ]
-then
-	mount -t sysfs sysfs $BROOT/sys
-    umountlist="$umountlist sys"
-else
-	echo "sys alredy mounted"
-fi
-
-[ -e $BROOT/dev/random ] || mknod $BROOT/dev/random  c  1 8
-[ -e $BROOT/dev/urandom ] || mknod $BROOT/dev/urandom c  1 9
-[ -e $BROOT/dev/tty ] || mknod $BROOT/dev/tty c 5 0
-[ -e $BROOT/dev/ptmx ] || mknod $BROOT/dev/ptmx c 5 2
-
-
-
-
-echo $mounted | grep -q $BROOT/dev/pts
-status=$?
-if [ ! $status = 0 ]
-then
-    [ -e  $BROOT/dev/pts  ] || mkdir -p $BROOT/dev/pts
-    mount -t devpts devpts $BROOT/dev/pts
-    umountlist="$umountlist dev/pts"
-else
-	echo "/dev/pts alredy mounted"
-fi
-
-
-
-#create dir for build_tools
-if [ ! -e $BROOT/build_tools ]
-then
-    mkdir $BROOT/build_tools
-fi
-#mount build_tools
-echo $mounted | grep -q $BROOT/build_tools
-status=$?
-if [ ! $status = 0 ]
-then
-    mount --bind $MYDIR/$TOOLS_DIR/build_tools $BROOT/build_tools
-     umountlist="$umountlist build_tools"
-else
-    echo "/build_tools alredy mounted"
-fi
-
-
-#create dir for the PKGBUILDS
-if [ ! -e $BROOT/data/LinHES-PKGBUILD ]
-then
-    mkdir -p $BROOT/data/LinHES-PKGBUILD
-fi
-
-#mount pkg_repo
-echo $mounted | grep -q $BROOT/data/LinHES-PKGBUILD
-status=$?
-if [ ! $status = 0 ]
-then
-    mount --bind $MYDIR/LinHES-PKGBUILD $BROOT/data/LinHES-PKGBUILD
-    umountlist="$umountlist data/LinHES-PKGBUILD"
+#	A LinHES development script to enter a chroot tree.
+#########################################################################
+# Configuration:							#
+#-----------------------------------------------------------------------#
+chrootBaseDir='build_root'	# basename of chroot tree.		#
+repoBaseDir='pkg_repo'		# basename of package repository tree.	#
+toolsDir='LinHES-dev'		# directory name of development tools.	#
+packageDir='LinHES-PKGBUILD'	# package development directory.	#
+C_B='\e[1m'			# set bold : comment out for no bold.	#
+#########################################################################
+C_N='\e[0m'			# back to normal text output.		#
+myDir=$(pwd)			# initial working directory.		#
+ARCH=${0##*.}			# pick off the architecture part.	#
+BROOT="$myDir/$chrootBaseDir.$ARCH"	# chroot subdir for $ARCH	#
+#########################################################################
+# Proceedures / Functions:						#
+#-----------------------------------------------------------------------#
+# Acquire the lock and modify the value, use: V=$(Modify +|-)
+Modify() { # $1 is + for up and - for down.
+    local LOCKFILE=.lock
+    local VALUFILE=.inst
+    (	# Acquire the lock:
+	flock -e -w 2 200
+	[ -e $VALUFILE ] || echo 0 > $VALUFILE
+	VAL=$(cat $VALUFILE)
+	NEW=$(expr $VAL $1 1)
+	echo "$NEW" > $VALUFILE
+	echo "$NEW"
+    ) 200>$LOCKFILE
+}
+#-----------------------------------------------------------------------#
+# check if a filesystem/directory is already mounted & if not, mount it.
+#   ckMount -t     <fstype> <mntDir>
+#   ckMount --bind <srcDir> <dstDir>
+ckMount() { # $1= -t|--bind, $2= fstype|srcDir $3= mntDir|dstDir
+    grep -q /$BROOT/$3 /proc/mounts || {
+	[ -d "$3" ] || mkdir -p $3
+	echo -e "mounting ${C_B}$3${C_N}"
+	case $1 in
+	    -t)		mount $1 $2 $2     $3	;;
+	    --bind)	mount $1 $myDir/$2 $3	;;
+	esac
+    }
+}
+#-----------------------------------------------------------------------#
+# if this is the last incident, unmount all.
+cleanUp() { # no arguments
+    # mark the exit to normal operation:
+    echo -en "\e]0;Normal\a"	# for xterm,
+    echo -en "\e]30;Normal\a"	# for Konsole.
+
+    V=$(Modify -)
+    [ "$V" -ne "0" ] && exit 0
+
+    # unmount all:
+    local mnts1="data/$repoBaseDir data/$packageDir build_tools"
+    local mnts2="dev/pts sys proc"
+    for i in $mnts1 $mnts2 ; do
+	grep -q $BROOT/$i /proc/mounts && {
+	    echo -e "unMounting ${C_B}$i${C_N}"
+	    umount $BROOT/$i  # >& /dev/null
+	}
+    done
+}
+#=======================================================================#
+# make certain that the chroot contains some files:
+copyIn() { # no arguments
+    local F=etc/resolv.conf
+    [ -e "$BROOT/$F" ] || cp -f /$F $F
+    [ -f etc/bashrc ]  || {
+	local D="$myDir/$toolsDir/templates/etc"
+	cp -f $D/bashrc		etc/
+	cp -f $D/kmdev.sh	etc/profile.d/
+	cp -f $D/.bashrc	root/
+	cp -f $D/.bash_profile	root/
+	chmod 0755 root/.bashrc root/.bash_profile etc/profile.d/kmdev.sh
+    }
+}
+#########################################################################
+# Prerequisites:							#
+#-----------------------------------------------------------------------#
+#  must be root:
+[ $EUID -ne 0 ] && {
+    echo -e "${C_B}chroot needs root priv's.${C_N}" 1>&2
+    exit 1
+}
+
+# must have the chroot subdirectory:
+[ -d $BROOT ] || {
+    echo -e "${C_B}$BROOT${C_N} directory not found!"
+    exit 2
+}
+
+# if building packages, needs $packageDir
+if [ -d "$packageDir" ]; then
+    echo -e "Found ${C_B}$packageDir${C_N}"
 else
-    echo "pkg_repo alredy mounted"
-fi
-
-
-
-#create dir for pkg_repo / local mirror
-if [ ! -e $BROOT/data/pkg_repo ]
-then
-    mkdir -p $BROOT/data/pkg_repo
-fi
-
-#mount pkg_repo
-echo $mounted | grep -q $BROOT/data/pkg_repo
-status=$?
-if [ ! $status = 0 ]
-then
-    mount --bind $MYDIR/pkg_repo $BROOT/data/pkg_repo
-    umountlist="$umountlist data/pkg_repo"
-else
-    echo "pkg_repo alredy mounted"
-fi
-
-
-
-
-
-
-
-
-#copy in some files
-[ -e  $BROOT/etc/resolv.conf  ] || cp -f /etc/resolv.conf $BROOT/etc/resolv.conf
-
-if [ ! -f $BROOT/etc/bashrc ]
-then
-	cp -f $MYDIR/$TOOLS_DIR/templates/etc/bashrc $BROOT/etc/
-	cp -f $MYDIR/$TOOLS_DIR/templates/etc/kmdev.sh $BROOT/etc/profile.d/kmdev.sh
-	cp -f $MYDIR/$TOOLS_DIR/templates/etc/.bashrc $BROOT/root/
-	cp -f $MYDIR/$TOOLS_DIR/templates/etc/.bash_profile $BROOT/root/
-	chmod 755 $BROOT/root/.bashrc
-	chmod 755 $BROOT/root/.bash_profile
-	chmod 755 $BROOT/etc/profile.d/kmdev.sh
+    printf "%s\n"        "**********************************************************************"
+    printf "* %-66s *\n" "Could Not find $packageDir"
+    printf "* %-66s *\n" "If you wish to be able to build packages within the chroot, then"
+    printf "* %-66s *\n" "Please checkout the package repository into the current directory."
+    printf "* %-66s *\n" "Its located @ knoppmyth.net/mount/repository/${packageDir}.git"
+    printf "%s\n"        "**********************************************************************"
 fi
 
-
-#change the "xterm" title so we know it's a chroot
-echo -e "\e]0;chroot-pkgbuild\a"
-#used for Konsole
-echo -e "\e]30;chroot-pkgbuild\a"
-env -i  TERM=$TERM /usr/sbin/chroot $BROOT /bin/bash --login
-
-
-
-for i in $umountlist
-do
-    #echo "unmounting $BROOT/$i"
-    umount $BROOT/$i
-done
-
-
-echo -e "\e]30;normal\a"
-echo -e "\e]0;normal\a"
-
+# change to the chroot subdirectory:
+cd $BROOT || {
+    echo -e "Could NOT cd to ${C_B}$BROOT${C_N} !"
+    exit 3
+}
+#########################################################################
+# Main:									#
+#-----------------------------------------------------------------------#
+V=$(Modify +)			# bump the instance count.
+trap cleanUp 1 2 15 EXIT
+
+ckMount -t proc   proc
+ckMount -t sysfs  sys
+ckMount -t devpts dev/pts
+
+[ -e dev/random ]  || mknod dev/random  c  1 8
+[ -e dev/urandom ] || mknod dev/urandom c  1 9
+[ -e dev/tty ]     || mknod dev/tty     c  5 0
+[ -e dev/ptmx ]    || mknod dev/ptmx    c  5 2
+
+ckMount --bind $toolsDir/build_tools build_tools
+ckMount --bind $packageDir           data/$packageDir
+ckMount --bind $repoBaseDir          data/$repoBaseDir
+
+copyIn
+
+# change the titlebar to indicate chroot:
+echo -e "\e]0;CHROOT : $ARCH\a"		# for xterm,
+echo -e "\e]30;CHROOT : $ARCH\a"	# for Konsole.
+
+# The actual chroot:
+env -i  TERM="$TERM" DISPLAY="$DISPLAY" /usr/sbin/chroot . /bin/bash --login
+
+# Note: the unMounts take place within the 'cleanUp' proceedure.
+#########################################################################
+# End
-- 
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