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Viewing changes to scripts/set_hostname.sh

  • Committer: Chris Behrens
  • Date: 2010-11-12 06:26:29 UTC
  • mfrom: (99.1.6 resolv-fixes)
  • Revision ID: chris.behrens@rackspace.com-20101112062629-j0c2837yh2r3klia
Merged lp:~cbehrens/agent-smith/resolv-fixes

/etc/resolv.conf is created now
hostname setting should work now
Agent upgrade supports /var/run/agent-smith.tar.gz as well as .tar
Bumped agent rev to 0.0.0.2

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Lines of Context:
scripts/set_hostname.sh
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hostname="$1"
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firstip="$2"
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if [ -z "$hostname" -o -z "$firstip" ] ; then
 
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  echo "Usage: set_hostname.sh <hostname> <first_ip>"
 
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  exit 1
 
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fi
 
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update_etc_hostname() {
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        echo ${hostname} > "${ROOT}/etc/hostname"
 
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  echo ${hostname} > "${ROOT}/etc/hostname"
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}
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update_etc_hosts() {
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        # This is tricky
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    # We need to be careful not to scribble over the existing entries
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    # in /etc/hosts, but also be thorough enough to actually make it work
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    backupfile="$(make_backup "${ROOT}/etc/hosts")"
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    if ! [ -f "${backupfile}" ]
 
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  # This is tricky
 
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  # We need to be careful not to scribble over the existing entries
 
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  # in /etc/hosts, but also be thorough enough to actually make it work
 
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  backupfile="$(make_backup "${ROOT}/etc/hosts")"
 
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  if ! [ -f "${backupfile}" ]
 
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  then
 
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    exit 1
 
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  fi
 
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  found=`awk -v ip=$firstip '$1 == ip { print "found"; exit 0 }' < ${ROOT}/etc/hosts`
 
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  if [ "x$found" != "xfound" ] ; then
 
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    echo "$firstip $hostname" >> ${ROOT}/etc/hosts
 
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    return 0
 
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  fi
 
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  cat "${backupfile}" | while read ip tail
 
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  do
 
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    if [ "x$ip" = "x${firstip}" ]
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    then
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        exit 1
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    fi
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        cat "${backupfile}" | while read ip tail
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        do
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                if [ "x$ip" = "x$firstip" ]
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                then
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            # If there's just a single hostname, assume it's the one we
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            # need to replace.
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                        if echo "$tail" | grep -iq '^[a-z][a-z0-9]*$'
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                        then
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                echo "#$ip $tail # Removed by Agent Smith"
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                echo "$ip $hostname"
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            elif echo "$tail" | grep -q '[      ]'
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                        then
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                                # Ok, more than one word in the line..
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                # Without the while loop, a, b, and c are not available
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                # afterwards
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                                echo "$tail" | while read a b c
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                                do
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                    if [ -n "$c" ] && ! echo "$c" | grep -q "^#"
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                    then
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                        # Three words.. Don't know how to handle that.
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                        echo "$ip $tail"
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                    elif echo "$a" | grep -q '\.' && echo echo "$b" | grep -q '\.'
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                    then
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                        # Two words, both with a dot in them.. Don't know how to handle that.
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                        echo "$ip $tail"
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                    elif ! echo "$a" | grep -q '\.' && ! echo echo "$b" | grep -q '\.'
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                    then
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                        # Two words, neither with a dot in them.. Don't know how to handle that.
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                        echo "$ip $tail"
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                    else
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                        # If there's not a dot in both, nor are both missing a dot,
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                        # exactly one of them must have a dot. Yay.
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                        withdot="$(echo $a | grep '\.' ; echo $b | grep '\.')"
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                        withoutdot="$(echo $a | grep -v '\.' ; echo $b | grep -v '\.')"
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                        if [ "${withdot%%.*}" != "${withoutdot}" ]
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                        then
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                            # If the host part doesn't match, I don't know what to do.
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                            echo "$ip $tail"
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                        else
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                            domain="${withdot#*.}"
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                            echo "#$ip $tail # Removed by Agent Smith"
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                            echo "$ip $hostname.$domain $hostname"
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                        fi
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                    fi
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                done
 
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      # If there's just a single hostname, assume it's the one we
 
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      # need to replace.
 
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      if echo "$tail" | egrep -iq '^[a-z](\-|[a-z0-9])*$'
 
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      then
 
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        echo "#$ip $tail # Removed by Agent Smith"
 
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        echo "$ip $hostname"
 
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      elif echo "$tail" | grep -q '[    ]'
 
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      then
 
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        # Ok, more than one word in the line..
 
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        # Without the while loop, a, b, and c are not available
 
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        # afterwards
 
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        echo "$tail" | while read a b c
 
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        do
 
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          if [ -n "$c" ] && ! echo "$c" | grep -q "^#"
 
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          then
 
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            # Three words.. Don't know how to handle that.
 
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            echo "$ip $tail"
 
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          elif echo "$a" | grep -q '\.' && echo echo "$b" | grep -q '\.'
 
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          then
 
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            # Two words, both with a dot in them.. Don't know how to handle that.
 
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            echo "$ip $tail"
 
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          elif ! echo "$a" | grep -q '\.' && ! echo echo "$b" | grep -q '\.'
 
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          then
 
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            # Two words, neither with a dot in them.. Don't know how to handle that.
 
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            echo "$ip $tail"
 
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          else
 
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            # If there's not a dot in both, nor are both missing a dot,
 
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            # exactly one of them must have a dot. Yay.
 
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            withdot="$(echo $a | grep '\.' ; echo $b | grep '\.')"
 
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            withoutdot="$(echo $a | grep -v '\.' ; echo $b | grep -v '\.')"
 
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            if [ "${withdot%%.*}" != "${withoutdot}" ]
 
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            then
 
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              # If the host part doesn't match, I don't know what to do.
 
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              echo "$ip $tail"
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            else
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                echo "$ip $tail"
 
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              domain="${withdot#*.}"
 
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              echo "#$ip $tail # Removed by Agent Smith"
 
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              echo "$ip $hostname.$domain $hostname"
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            fi
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        else
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            echo "$ip $tail"
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        fi
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    done > "${ROOT}/etc/hosts"
 
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          fi
 
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        done
 
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      else
 
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        echo "$ip $tail"
 
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      fi
 
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    else
 
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      echo "$ip $tail"
 
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    fi
 
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  done > "${ROOT}/etc/hosts"
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}
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update_etc_hostname
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update_etc_hosts
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if [ "$ROOT" = "/" -o "$ROOT" = "" ] ; then
 
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  # only do this if we're not running tests
 
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  hostname $hostname
 
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fi
 
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exit 0