2 # Sets up (if necessary) and chroots into a different environment.
3 # Expects root privileges, does not drop them.
5 # By Alan M Bruce (qole) with help from Benson Mitchell and Thomas Perl
7 # GPL licensed; keep code free!
9 # This script should have a wrapper to set up extra variables,
10 # OR, it can be run as a command:
11 # ezchroot <part/file/'none'> <chroot dir> <command> <params...>
13 if [ "`whoami`" != "root" ] ; then
14 echo "please run me as root!"
24 # echo ezchroot $IMGFILE $CHROOT $*
26 # Strip off a trailing slash
27 LASTCHAR=`echo $CHROOT | cut -c ${#CHROOT}`
28 if [ "$LASTCHAR" = "/" ] ; then
29 echo "..stripping trailing slash..." >/dev/stderr
30 CHROOT=`echo $CHROOT | cut -c 0-$((${#CHROOT}-1))`
33 qmount $IMGFILE $CHROOT
36 if [ "$MOUNTSUCCESS" != "1" ] && [ "$MOUNTSUCCESS" != "0" ] ; then
37 echo Cancelling chroot...
41 if [ "$MOUNTSUCCESS" = "0" ] ; then
42 #Make the tablet's devices available to the chroot
44 mount -o bind /dev "$CHROOT/dev"
45 mount -o bind /proc "$CHROOT/proc"
47 #Gentoo wiki says this will make X work
49 mount -t devpts none "$CHROOT/dev/pts"
50 mount -o bind /tmp "$CHROOT/tmp"
52 #Open e-mail attachments, etc
53 mount -o bind /var/tmp "$CHROOT/var/tmp"
55 #ArchLinux suggestions
56 mount -o bind /dev/shm "$CHROOT/dev/shm"
57 mount -o bind /sys "$CHROOT/sys"
61 MNTD=`cat /proc/mounts | grep ' /media/' | awk '{print $2}'`
63 for MDRV in $MNTD ; do
64 if [ ! -d "$CHROOT$MDRV" ] ; then
65 mkdir -p "$CHROOT$MDRV"
67 mount -o bind "$MDRV" "$CHROOT$MDRV"
70 #Mount the user's home dir
71 echo .... >/dev/stderr
72 #mount -o bind /home/user "$CHROOT/home/user"
74 # Do it the Fremantle way.
75 mount /dev/mmcblk0p2 "$CHROOT/home"
76 mount /dev/mmcblk0p1 "$CHROOT/home/user/MyDocs"
79 mount -o bind /var/run/dbus "$CHROOT/var/run/dbus"
80 mount -o bind /var/lib/dbus "$CHROOT/var/lib/dbus"
83 mount -o bind /var/run/pulse "$CHROOT/var/run/pulse"
85 #Speed hacks: lower the priority of processes
86 #renice 0 `pidof mmcqd`
87 #renice 20 `pidof trackerd`
89 # Sync the chroot if requested...
90 if [ -f /home/user/.synchroot ] ; then
91 /sbin/synchroot $CHROOT
92 rm /home/user/.synchroot
95 # Place any commands you wish to run the first time you chroot
96 # into the /var/run/onfirstchroot-ext.rc file (inside your rootfs)
98 if [ -f "$CHROOT/var/run/onfirstchroot-ext.rc" ] ; then
99 . "$CHROOT/var/run/onfirstchroot-ext.rc"
102 # Place any commands you wish to run from inside the chroot
103 # the first time you chroot into the /var/run/onfirstchroot.rc
104 # file (inside your rootfs)
106 if [ -f "$CHROOT/var/run/onfirstchroot.rc" ] ; then
107 chroot $CHROOT "/var/run/onfirstchroot.rc"
112 # Place any commands you wish to run every time you chroot
113 # into the /var/run/onchroot-ext.rc file (inside your rootfs)
115 if [ -f "$CHROOT/var/run/onchroot-ext.rc" ] ; then
116 . "$CHROOT/var/run/onchroot-ext.rc"
119 # Place any commands you wish to run from inside the chroot
120 # every time you chroot into the /var/run/onchroot.rc
121 # file (inside your rootfs)
123 if [ -f "$CHROOT/var/run/onchroot.rc" ] ; then
124 chroot $CHROOT "/var/run/onchroot.rc"
127 #All set up. Set flag for next time...
129 if [ ! -d "$CHROOT/var/lock" ] ; then
130 mkdir -p "$CHROOT/var/lock"
133 trap "rm -f $CHROOT/var/lock/chroot-complete ; echo -ne '\033]0;osso_xterm\007' ; exit" INT TERM EXIT
134 echo $IMGFILE $@ > "$CHROOT/var/lock/chroot-complete"
136 #Custom prompt and xterm title. Reduces confusion.
137 CHRLABEL=`blkid -s LABEL $IMGFILE | cut -d' ' -f2 | cut -d'=' -f2 | sed 's/"//g'`
139 #If the file is mounted on loop, use that label.
140 if [ "x$CHRLABEL" = "x" ] ; then
142 # first find the loop
143 LOOPNO=`mount | grep loop | grep $CHROOT | awk '{print $1}'`
145 if [ "x$LOOPNO" != "x" ] ; then
146 CHRLABEL=`blkid -s LABEL $LOOPNO | cut -d' ' -f2 | cut -d'=' -f2 | sed 's/"//g'`
150 if [ "x$CHRLABEL" = "x" ] ; then
154 echo -ne "\033]0;$CHRLABEL\007" >/dev/stderr
155 export PS1="[\u@$CHRLABEL: \w]"
158 echo "Everything set up, running chroot..." >/dev/stderr