tools/mkchroot

   1 #!/bin/sh
   2 #
   3 # IRC - Internet Relay Chat, tools/mkchroot
   4 # Copyright (C) 2001 Kevin L. Mitchell <klmitch@mit.edu>
   5 #
   6 # This program is free software; you can redistribute it and/or modify
   7 # it under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation; either version 1, or (at your option)
   9 # any later version.
  10 #
  11 # This program is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 # GNU General Public License for more details.
  15 #
  16 # You should have received a copy of the GNU General Public License
  17 # along with this program; if not, write to the Free Software
  18 # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19 #
  20 # $Id: mkchroot,v 1.1 2001/06/21 15:48:16 kev Exp $
  21
  22 if test $# -lt 2; then
  23     echo "Usage: $0 <destdir> <executable> [<executable> [...]]" >&2
  24     exit 2
  25 fi
  26
  27 destdir=$1
  28 shift
  29
  30 # Use ldd to formulate a newline-separated list of libraries
  31 liblist=
  32 for arg
  33 do
  34     # Interpret ldd output
  35     libs=`ldd $arg | sed -e 's/ / /g' -e 's/  */ /g' -e 's/^ //g' | \
  36         awk 'BEGIN { RS = " "; } { print; }' | grep '^/'`
  37
  38     # add it to the list so far
  39     if test x"$liblist" = x; then
  40         liblist=$libs
  41     else
  42         liblist="$liblist
  43 $libs"
  44     fi
  45 done
  46 # Sort the list and remove duplicates
  47 liblist=`echo "$liblist" | sort -u`
  48
  49 # Now figure out all the subdirectories we're interested in
  50 # Must create the top level, if need be
  51 dirlist=/
  52 # Break down the library list into directories and remove duplicates
  53 dirs=`echo "$liblist" | sed -e 's@/[^/]*$@@' | sort -u`
  54 # Go through each directory to break it down into its components
  55 for headdir in $dirs; do
  56     tIFS=$IFS
  57     IFS=/$IFS
  58     # Start at the top level
  59     dir=
  60     for subdir in $headdir; do
  61         # update dir so we know where we are
  62         if test x"$dir" = x; then
  63             dir=$subdir
  64         else
  65             dir=$dir/$subdir
  66         fi
  67
  68         # add (absolute) entry to directory list
  69         dirlist="$dirlist
  70 /$dir"
  71     done
  72     IFS=$tIFS
  73 done
  74 # Sort for ordering and remove duplicates
  75 dirlist=`echo "$dirlist" | sort -u`
  76
  77 # Create the directories
  78 echo "Creating directories:"
  79 for dir in $dirlist; do
  80     # add destination directory name, remove trailing /, if any, for test
  81     dir=`echo "$destdir$dir" | sed -e 's@//*$@@'`
  82     echo "  $dir"
  83     # sanity-check directory...
  84     if test -f "$dir" -o -h "$dir"; then
  85         echo "ERROR: A non-directory \"$dir\" already exists; bailing out" >&2
  86         exit 2
  87     elif test ! -d "$dir"; then
  88         # Create the directory world-readable
  89         mkdir -m 755 $dir
  90     fi
  91 done
  92
  93 # Now copy over the libraries
  94 echo "Copying libraries:"
  95 for lib in $liblist; do
  96     echo "  $lib -> $destdir$lib"
  97     # Preserve permissions
  98     cp -p $lib $destdir$lib
  99 done