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annotate bin/fjail @ 74:247d35f910ca

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fjail datasets now recognized a "-u" command option to not automatically mount created datasets
author Franz Glasner <hg@dom66.de>
date Thu, 15 Aug 2019 15:58:24 +0200
parents 2e991a00035b
children 2e3ac70bdfc8
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1 #!/bin/sh
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2 # -*- indent-tabs-mode: nil; -*-
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3 # @(#)$HGid$
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4
74
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5 set -eu
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6
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7 VERSION="@@VERSION@@"
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8
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9 # Reset to standard umask
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10 umask 0022
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11
74
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12
73
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13 #
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14 # "datasets" -- create the ZFS dataset tree
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15 #
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16 # command_datasets [ -u ] parent-dataset child-dataset
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17 #
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18 # -u do not automatically mount newly created datasets
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19 #
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20 command_datasets() {
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21 # parent ZFS dataset -- child ZFS dataset name
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22 local _pds _cds
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23 # and its mount point
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24 local _pmp _get _dummy
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25 # full name of the dataset
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26 local _ds
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27 # dynamic ZFS options
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28 local _zfsopts
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29
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30 _zfsopts=""
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31 while getopts "u" _opt ; do
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32 case ${_opt} in
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33 u)
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34 # do not mount newly created datasets
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35 _zfsopts="${_zfsopts} -u"
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36 ;;
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37 \?|:)
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38 return 2;
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39 ;;
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40 esac
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41 done
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42 shift $((OPTIND-1))
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43 OPTIND=1
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44
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45 _pds="$1"
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46 if [ -z "${_pds}" ]; then
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47 echo "ERROR: no parent dataset given" >&2
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48 return 2
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49 fi
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50 _get=$(zfs get -H mountpoint "${_pds}" 2>/dev/null) || { echo "ERROR: dataset \`${_pds}' does not exist" >&2; return 1; }
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51 IFS=$'\t' read _dummy _dummy _pmp _dummy <<EOF
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52 ${_get}
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53 EOF
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54 case "${_pmp}" in
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55 none)
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56 echo "ERROR: dataset \`${_pds}' has no mountpoint" >&2
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57 return 1
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58 ;;
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59 legacy)
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60 echo "ERROR: dataset \`${_pds}' has a \`${_mp}' mountpoint" >&2
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61 return 1
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62 ;;
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63 *)
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64 # VOID
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65 ;;
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66 esac
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67 _cds="$2"
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68 if [ -z "${_cds}" ]; then
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69 echo "ERROR: no child dataset given" >&2
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70 return 2
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71 fi
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72 _ds="${_pds}/${_cds}"
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73 echo "Resulting new root dataset is \`${_ds}' at mountpoint \`${_pmp}/${_cds}'"
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74 if zfs get -H mountpoint "${_ds}" >/dev/null 2>/dev/null; then
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75 echo "ERROR: dataset \`${_ds}' does already exist" >&2
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76 return 1
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77 fi
74
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78 zfs create ${_zfsopts} -o atime=off "${_ds}"
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79 zfs create ${_zfsopts} -o sync=disabled -o setuid=off "${_ds}/tmp"
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80 zfs create ${_zfsopts} "${_ds}/usr"
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81 zfs create ${_zfsopts} "${_ds}/var"
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82 zfs create ${_zfsopts} -o exec=off -o setuid=off "${_ds}/var/audit"
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83 zfs create ${_zfsopts} -o exec=off -o setuid=off "${_ds}/var/cache"
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84 zfs create ${_zfsopts} -o exec=off -o setuid=off -o compression=off "${_ds}/var/cache/pkg"
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85 zfs create ${_zfsopts} -o exec=off -o setuid=off -o compression=off "${_ds}/var/crash"
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86 zfs create ${_zfsopts} -o exec=off -o setuid=off "${_ds}/var/db"
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87 zfs create ${_zfsopts} -o exec=on -o setuid=off "${_ds}/var/db/pkg"
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88 zfs create ${_zfsopts} -o readonly=on -o exec=off -o setuid=off "${_ds}/var/empty"
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89 zfs create ${_zfsopts} -o exec=off -o setuid=off -o primarycache=metadata "${_ds}/var/log"
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90 zfs create ${_zfsopts} -o exec=off -o setuid=off -o atime=on "${_ds}/var/mail"
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91 zfs create ${_zfsopts} -o sync=disabled -o exec=off -o setuid=off -o compression=off -o primarycache=all "${_ds}/var/run"
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92 zfs create ${_zfsopts} -o sync=disabled -o setuid=off "${_ds}/var/tmp"
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93 }
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94
74
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95
73
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96 #
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97 # "privs" -- adjust privileges
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98 #
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99 # To be used when all ZFS datasets are mounted.
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100 #
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101 command_privs() {
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102 # mountpoint
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103 local _mp _d
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104
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105 _mp="$1"
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106 if [ -z "${_mp}" ]; then
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107 echo "ERROR: no mountpoint given" >&2
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108 return 2
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109 fi
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110 if [ ! -d "${_mp}" ]; then
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111 echo "ERROR: directory \`${_mp}' does not exist" >&2
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112 return 1
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113 fi
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114 for _d in tmp var/tmp ; do
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115 chmod 01777 "${_mp}/${_d}"
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116 done
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117 chown root:mail "${_mp}/var/mail"
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118 chmod 0775 "${_mp}/var/mail"
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119 }
72
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120
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121
72
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122 #
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123 # Global option handling
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124 #
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125 while getopts "h" _opt ; do
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126 case ${_opt} in
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127 h)
73
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128 echo "Usage: XXX TBD"
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129 exit 0
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130 ;;
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131 \?|:)
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132 exit 2;
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133 ;;
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134 esac
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135 done
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136
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137 #
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138 # Reset the Shell's option handling system to prepare for handling
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139 # command-local options.
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140 #
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141 shift $((OPTIND-1))
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142 OPTIND=1
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143
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144 command="$1"
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145 shift
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146
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147 case "${command}" in
73
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148 datasets)
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149 command_datasets "$@"
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150 ;;
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151 privs)
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152 command_privs "$@"
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153 ;;
72
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154 *)
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155 echo "ERROR" >&2
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156 exit 2
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157 ;;
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158 esac