From 9725ed4a85232ac02d14f1f78aa9186cf2963d7b Mon Sep 17 00:00:00 2001
From: erdgeist <erdgeist@erdgeist.org>
Date: Wed, 15 Nov 2006 18:51:22 +0000
Subject: HEADS UP: renaming jails has been introduced. Lots of checking will
 probably be required, this version is considered unstable. Also two minr
 style glitches have been fixed.

---
 ezjail-admin | 111 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 106 insertions(+), 5 deletions(-)

diff --git a/ezjail-admin b/ezjail-admin
index c4c754a..655e939 100755
--- a/ezjail-admin
+++ b/ezjail-admin
@@ -38,7 +38,7 @@ ezjail_usage_install="Usage: ${ezjail_admin} install [-mps] [-h host] [-r releas
 ezjail_usage_create="Usage: ${ezjail_admin} create [-xbi] [-f flavour] [-r jailroot] [-s size] [-c bde|eli] [-C args] jailname jailip"
 ezjail_usage_delete="Usage: ${ezjail_admin} delete [-w] jailname"
 ezjail_usage_update="Usage: ${ezjail_admin} update [-s sourcetree] [-i] [-pP]"
-ezjail_usage_config="Usage: ${ezjail_admin} config [-r run|norun] [-i attach|detach] jailname"
+ezjail_usage_config="Usage: ${ezjail_admin} config [-r run|norun] [-n newname] [-i attach|detach] jailname"
 ezjail_usage_list="Usage: ${ezjail_admin} list"
 
 ################################
@@ -239,7 +239,7 @@ create)
 
   # jail names may lead to identical configs, eg. foo.bar.com == foo-bar.com
   # so check, whether we might be running into problems
-  [ -e ${ezjail_config} ] && exerr "Error: an ezjail config already exists at ${ezjail_config}. Please rename the ezjail."
+  [ -e ${ezjail_config} -o -e ${ezjail_config}.norun ] && exerr "Error: an ezjail config already exists at ${ezjail_config}. Please rename the ezjail."
 
   # if jail root specified on command line is not absolute, make it absolute
   # inside our jail directory
@@ -343,7 +343,7 @@ create)
   # if the automount feature is not disabled, this fstab entry for new jail
   # will be obeyed
   echo -n > /etc/fstab.${ezjail_safename}
-  [ "${ezjail_imagetype}" ] && \
+  [ -n "${ezjail_imagetype}" ] && \
   echo ${ezjail_rootdir}.device ${ezjail_rootdir} ufs rw 0 0 >> /etc/fstab.${ezjail_safename}
   echo ${ezjail_jailbase} ${ezjail_rootdir}/basejail nullfs ro 0 0 >> /etc/fstab.${ezjail_safename}
 
@@ -596,9 +596,10 @@ config)
   # Clean variables, prevent polution
   unset ezjail_setrunnable ezjail_imageaction
 
-  shift; while getopts :r:i: arg; do case ${arg} in
+  shift; while getopts :r:i:n: arg; do case ${arg} in
     i) ezjail_imageaction=${OPTARG};;
     r) ezjail_setrunnable=${OPTARG};;
+    n) ezjail_new_name=${OPTARG};;
     ?) exerr ${ezjail_usage_config};;
   esac; done; shift $(( ${OPTIND} - 1 ))
 
@@ -611,7 +612,107 @@ config)
   [ -n "${ezjail_config}" ] || exerr "Error: Nothing known about jail ${ezjail_name}."
 
   # Nothing to be configured?
-  [ -z "${ezjail_setrunnable}" -a -z "${ezjail_imageaction}" ] && echo "Warning: No config option specified."
+  [ -z "${ezjail_setrunnable}" -a -z "${ezjail_new_name}" -a -z "${ezjail_imageaction}" ] && echo "Warning: No config option specified."
+
+  # Do we want a new name for our jail?
+  if [ -n "${ezjail_new_name}" ]; then
+    # if jail is still running, refuse to go any further
+    [ -n "${ezjail_id}" ] && exerr "Error: Jail appears to be still running, stop it first."
+
+    # Cannot rename an attached jail
+    [ -n "${ezjail_attached}" ] && exerr "Error: Jail image file ${ezjail_image} is attached as ${ezjail_device}. '${ezjail_admin} config -i detach' it first."
+
+    # The new values for the jail
+    ezjail_new_hostname=`echo -n ${ezjail_new_name} | tr '/~' '__'`
+    ezjail_new_safename=`echo -n "${ezjail_new_name}" | tr -c '[:alnum:]' _`
+    ezjail_new_rootdir=`basename -- ${ezjail_rootdir}`/${ezjail_new_hostname}
+    ezjail_new_config=${ezjail_jailcfgs}/${ezjail_new_safename}
+    [ "${ezjail_config}" = "${ezjail_config%.norun}" ] || ezjail_new_config=${ezjail_jailcfgs}/${ezjail_new_safename}.norun
+    ezjail_new_softlink=${ezjail_jaildir}/`basename -- ${ezjail_new_rootdir}`
+
+    # those are just copied
+    eval ezjail_new_ip=\"\$jail_${ezjail_safename}_ip\"
+    eval ezjail_new_exec=\"\$jail_${ezjail_safename}_exec\"
+    eval ezjail_new_mount_enable=\"\$jail_${ezjail_safename}_mount_enable\"
+    eval ezjail_new_devfs_enable=\"\$jail_${ezjail_safename}_devfs_enable\"
+    eval ezjail_new_devfs_ruleset=\"\$jail_${ezjail_safename}_devfs_ruleset\"
+    eval ezjail_new_procfs_enable=\"\$jail_${ezjail_safename}_devfs_enable\"
+    eval ezjail_new_fdescfs_enable=\"\$jail_${ezjail_safename}_fdescfs_enable\"
+    eval ezjail_new_attachparams=\"\$jail_${ezjail_safename}_attachparams\"
+    eval ezjail_new_attachblocking=\"\$jail_${ezjail_safename}_attachblocking\"
+    eval ezjail_new_forceblocking=\"\$jail_${ezjail_safename}_forceblocking\"
+    eval ezjail_new_imagetype=\"\$jail_${ezjail_safename}_imagetype\"
+
+    # This scenario really will only lead to real troubles in the 'fulljail'
+    # case, but I should still explain this to the user and not claim that
+    # "an ezjail would already exist"
+    case ${ezjail_new_hostname} in basejail|newjail|fulljail|flavours|ezjailtemp) exerr "Error: ezjail needs the ${ezjail_new_hostname} directory for its own administrative purposes. Please rename the ezjail.";; esac
+  
+    # jail names may lead to identical configs, eg. foo.bar.com == foo-bar.com
+    # so check, whether we might be running into problems
+    [ -e ${ezjail_new_config} -o -e ${ezjail_new_config}.norun ] && exerr "Error: an ezjail config already exists at ${ezjail_new_config}. Please rename the ezjail."
+
+    # need to rename the image?
+    if [ -n "${ezjail_image}" ]
+      # Do we have an auto generated image name?
+      if [ "${ezjail_rootdir}.img" = "${ezjail_image}" ]
+        ezjail_newimage=${ezjail_newrootdir}.img}
+        mv ${ezjail_image} ${ezjail_new_image}
+      else
+        ezjail_new_image=${ezjail_image}
+        echo "Warning: Image file for jail ${ezjail_name} remains ${ezjail_image}, as it was not auto generated"
+      fi
+    else
+      unset ezjail_new_image
+    fi
+
+    # adjust softlink
+    if [ -L "${ezjail_softlink}" ]; then
+      rm ${ezjail_softlink}
+      ln -s ${ezjail_new_rootdir} ${ezjail_new_softlink}
+    fi
+
+    # rename rootdir
+    mv ${ezjail_rootdir} ${ezjail_new_rootdir}
+
+    # rename fstab
+    echo -n > /etc/fstab.${ezjail_new_safename}
+    [ -n "${ezjail_new_imagetype}" ] && \
+    echo ${ezjail_new_rootdir}.device ${ezjail_new_rootdir} ufs rw 0 0 >> /etc/fstab.${ezjail_new_safename}
+    echo ${ezjail_jailbase} ${ezjail_new_rootdir}/basejail nullfs ro 0 0 >> /etc/fstab.${ezjail_new_safename}
+    rm /etc/fstab.${ezjail_safename}
+
+    # rename config file, preserve comments
+    (
+    grep -e ^\# ${ezjail_config}
+    echo
+    echo export jail_${ezjail_new_safename}_hostname=\"${ezjail_new_hostname}\"
+    echo export jail_${ezjail_new_safename}_ip=\"${ezjail_new_ip}\"
+    echo export jail_${ezjail_new_safename}_rootdir=\"${ezjail_new_rootdir}\"
+    echo export jail_${ezjail_new_safename}_exec=\"${ezjail_new_exec}\"
+    echo export jail_${ezjail_new_safename}_mount_enable=\"${ezjail_new_mount_enable}\"
+    echo export jail_${ezjail_new_safename}_devfs_enable=\"${ezjail_new_devfs_enable}\"
+    echo export jail_${ezjail_new_safename}_devfs_ruleset=\"${ezjail_new_devfs_ruleset\"
+    echo export jail_${ezjail_new_safename}_procfs_enable=\"${ezjail_new_procfs_enable}\"
+    echo export jail_${ezjail_new_safename}_fdescfs_enable=\"${ezjail_new_fdescfs_enable}\"
+    echo export jail_${ezjail_new_safename}_image=\"${ezjail_new_image}\"
+    echo export jail_${ezjail_new_safename}_imagetype=\"${ezjail_new_imagetype}\"
+    echo export jail_${ezjail_new_safename}_attachparams=\"${ezjail_new_attachparams}\"
+    echo export jail_${ezjail_new_safename}_attachblocking=\"${ezjail_new_attachblocking}\"
+    echo export jail_${ezjail_new_safename}_forceblocking=\"${ezjail_new_forceblocking}\"
+    ) > ${ezjail_new_config}
+
+    # remove old config
+    rm ${ezjail_config}
+
+    # usually that doesnt go smoothly, but the user wanted it
+    # that way ;)
+    echo Jail has been renamed. You might want to check ${ezjail_new_config} and /etc/fstab.${ezjail_new_safename} to ensure everything has gone smoothly.
+    echo Also check settings in your Jail's /etc/ directory (especially /etc/rc.conf).
+
+    # reread config
+    fetchjailinfo ${ezjail_new_safename}
+  fi
 
   case ${ezjail_setrunnable} in
     run)   [ "${ezjail_config}" = "${ezjail_config%.norun}" ] || mv ${ezjail_config} ${ezjail_config%.norun};;
-- 
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