Mercurial > pkg

     1 #!/bin/bash

     2 # Copyright (c) 2004 Matthias S. Benkmann <article AT winterdrache DOT de>

     3 # You may do everything with this code except misrepresent its origin.

     4 # PROVIDED `AS IS' WITH ABSOLUTELY NO WARRANTY OF ANY KIND!

     5 

     6 #Package user home directories will be located under this directory

     7 homebase=/usr/src

     8 

     9 #Contents of following directory are copied into home directory when creating 

    10 #a new package user (existing files will not be overwritten)

    11 skel=/etc/pkgusr/skel-package

    12 

    13 if [ $# -lt 7 ]; then

    14   echo 1>&2 'USAGE: '

    15   echo 1>&2 'add_package_user <description> <name> <minuid> <maxuid> \'

    16   echo 1>&2 '                              <group> <mingid> <maxgid> [-d <home>]'

    17   echo 1>&2

    18   echo 1>&2 'If a user account called <name> exists, a message will be printed and'

    19   echo 1>&2 'everything will be left as-is. If a user account called <name> does not'

    20   echo 1>&2 'exist, one will be created.'

    21   echo 1>&2 'The account'"'"'s primary group will be <group> and the /etc/passwd'

    22   echo 1>&2 'description field will be set to <description>. If a group called <group>'

    23   echo 1>&2 'does not already exist, one will be created.'

    24   echo 1>&2 'The new account will get the "install" group as a supplementary group. If'

    25   echo 1>&2 'a group named "install" does not exist, one will be created.'

    26   echo 1>&2

    27   echo 1>&2 '<description> needs to be a valid string for the /etc/passwd description'

    28   echo 1>&2 '  field. This means, among other things, that it must not contain ":".'

    29   echo 1>&2 '  Don'"'"'t forget to properly quote <description> if it contains spaces or'

    30   echo 1>&2 '  other characters interpreted by the shell!'

    31   echo 1>&2

    32   echo 1>&2 '<minuid>(incl.) and <maxuid>(excl.) determine the numeric range from which'

    33   echo 1>&2 '  the new account'"'"'s UID will be picked in the following way:'

    34   echo 1>&2

    35   echo 1>&2 '  1. If the range contains no unused UID => Exit with error.'

    36   echo 1>&2 '  2. If <maxuid>-1 is still unused, find the greatest UID from the range'

    37   echo 1>&2 '     that is used and pick the number after that.'

    38   echo 1>&2 '  3. If <maxuid>-1 is in use, pick the first unused number from the range.'

    39   echo 1>&2

    40   echo 1>&2 '<mingid>(incl.) and <maxgid>(excl.) determine the numeric range from which'

    41   echo 1>&2 '  to pick the GID for group <group> and/or group "install", if it needs to be'

    42   echo 1>&2 '  created. The process for picking the GID is the same as that for the UID.'

    43   echo 1>&2 ''

    44   echo 1>&2 '<home> specifies the new user'"'"'s home directory. If it is not provided,'

    45   echo 1>&2 '  it will default to '"$homebase/<name> ."

    46   echo 1>&2 '  If the home directory does not exist yet it will be created, otherwise'

    47   echo 1>&2 '  the existing directory will be recursively chown'"'"'ed to the new user.'

    48   echo 1>&2 '  The home directory will be populated with a copy of the contents of'

    49   echo 1>&2 "  $skel, but pre-existing files in the home directory"

    50   echo 1>&2 '  will not be overwritten. Note that symlinks will be copied as symlinks!'

    51   echo 1>&2 ''

    52   exit 1

    53 fi

    54 

    55 grpfile=/etc/group

    56 passwd=/etc/passwd

    57 

    58 

    59 

    60 description=$1

    61 name=$2

    62 minuid=$3

    63 maxuid=$4

    64 gname=$5

    65 mingid=$6

    66 maxgid=$7

    67 home=$homebase/$name

    68 

    69 set -- "$@" _eNd_OF_lisT_

    70 while [ "$1" != "_eNd_OF_lisT_" ]; do

    71   case "$1" in

    72     -d) shift 1

    73         if [ "$1" = "_eNd_OF_lisT_" ]; then

    74           echo 1>&2 "-d directory name missing!"

    75           exit 1

    76         fi

    77         home="$1"

    78         shift 1

    79         ;;

    80     *) temp="$1" 

    81        shift 1

    82        set -- "$@" "$temp"

    83        ;;

    84   esac     

    85 done

    86 shift 1 #throw away _eNd_OF_lisT_

    87 

    88 if [ $UID -ne 0 ]; then echo Please run this script as root. ; exit 1; fi

    89 

    90 #test if user already exists

    91 grep "^$name:.*" $passwd

    92 if [ $? -eq 0 ]; then 

    93   echo 'Package user does already exist! Do su '$name' to do maintenance work.'

    94   exit 1

    95 fi 

    96 

    97 #test if minuid, maxuid, mingid and maxgid are integers, otherwise error

    98 error=0

    99 expr ${minuid} + 1 2>/dev/null 1>&2 || error=1

   100 expr ${maxuid} + 1 2>/dev/null 1>&2 || error=1

   101 expr ${mingid} + 1 2>/dev/null 1>&2 || error=1

   102 expr ${maxgid} + 1 2>/dev/null 1>&2 || error=1

   103 

   104 if [ $error -eq 1 ]; then

   105   echo Error: Illegal numeric value!

   106   exit 1

   107 fi

   108 

   109 if [ $minuid -ge $maxuid ]; then

   110   echo 'Error: minuid must be less than maxuid !' 

   111   exit 1

   112 fi

   113 

   114 if [ $mingid -ge $maxgid ]; then

   115   echo 'Error: mingid must be less than maxgid !' 

   116   exit 1

   117 fi

   118 

   119 

   120 uidlist=`cut -d : -f 3 $passwd | sort -n`

   121 

   122 #find last used UID within range

   123 u=0

   124 for i in $uidlist

   125 do

   126   if [ $i -ge $maxuid ]; then break; fi

   127   if [ $i -ge $minuid ]; then u=$i; fi 

   128 done

   129 

   130 #if no UID from the range is used, pick the first, otherwise pick the one

   131 #immediately following the last UID in use.

   132 if [ $u -eq 0 ]; then u=$minuid; else u=`expr $u + 1`; fi

   133 

   134 #if the UID determined above is >= maxuid (i.e. illegal)

   135 #then we look for the first unused uid in the range.

   136 if [ $u -ge $maxuid ]; then

   137   u=$minuid

   138   for i in $uidlist

   139   do

   140     if [ $u -eq $i ]; then u=`expr $u + 1` ; fi

   141     if [ $i -ge $maxuid ]; then break; fi

   142   done  

   143 

   144   if [ $u -ge $maxuid ]; then

   145     echo Error: UID range is full!

   146     exit 1

   147   fi

   148 fi

   149 

   150 echo Will create user $name with uid: $u

   151 

   152 unset uidlist

   153 

   154 #############################################################################

   155 #                                 group

   156 #############################################################################

   157 

   158 #execute the following for gname and "install" to get gids for those 2 groups

   159 

   160 g=0

   161 creategroup=0

   162 for group in install $gname

   163 do

   164   oldg=$g #save gid from previous run

   165   createinstall=$creategroup

   166   creategroup=0

   167  

   168   #test if group already exists and extract gid if so

   169   g=`grep ^${group}:.\* $grpfile | cut -d : -f 3 -`

   170 

   171   #if group does not exist, then check range for a free gid

   172   if [ z$g = z ]; then 

   173     creategroup=1

   174     

   175     gidlist=`cut -d : -f 3 $grpfile | sort -n`

   176 

   177     #find last used GID within range

   178     g=0

   179     for i in $gidlist

   180     do

   181       if [ $i -ge $maxgid ]; then break; fi

   182       if [ $i -ge $mingid ]; then g=$i; fi

   183     done

   184 

   185     #if no GID from the range is used, pick the first, otherwise pick the one

   186     #immediately following the last GID in use.

   187     if [ $g -eq 0 ]; then g=$mingid; else g=`expr $g + 1`; fi

   188     

   189     #don't reuse gid from previous run 

   190     if [ $g -eq $oldg ]; then g=`expr $g + 1`; fi

   191 

   192     #if the GID determined above is >= maxgid (i.e. illegal)

   193     #then we look for the first unused gid in the range.

   194     if [ $g -ge $maxgid ]; then

   195       g=$mingid

   196       for i in $gidlist

   197       do

   198         if [ $g -eq $i ]; then g=`expr $g + 1` ; fi

   199         if [ $g -eq $oldg ]; then g=`expr $g + 1` ; fi

   200         if [ $i -ge $maxgid ]; then break; fi

   201       done  

   202 

   203       if [ $g -ge $maxgid ]; then

   204         echo Error: GID range is full!

   205         exit 1

   206       fi

   207     fi

   208   fi

   209 done

   210 

   211 unset gidlist

   212 

   213 if [ $createinstall -eq 1 ]; then

   214   echo Creating group install with gid $oldg

   215   groupadd -g $oldg install || exit 1

   216 else

   217   echo Group install has gid $oldg

   218 fi

   219 if [ $creategroup -eq 1 ]; then

   220   echo Creating group $gname with gid $g

   221   groupadd -g $g $gname || exit 1

   222 else 

   223   echo Group $gname has gid $g

   224 fi

   225 

   226 

   227 

   228 useradd -c "${description}" -d ${home} -g ${gname} -G install \

   229         -s /bin/bash -u ${u} ${name}  || exit 1

   230 

   231 mkdir -p $home || exit 1

   232 

   233 yes n|cp -ai -R ${skel}/{[^.],.[^.],..?}* ${home} 2>/dev/null >/dev/null

   234 

   235 cd ${home}

   236 chown --recursive ${u}:${g} .

   237 

   238 

   239 exit 0
author	Robert McIntyre <rlm@mit.edu>
date	Tue, 08 Jan 2013 11:45:01 +0000
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