Mercurial > hgrepos > FreeBSD > ports > sysutils > local-bsdtools
annotate bin/fjail @ 76:fea2ef3ff89a
Populate an existing directory tree with the contents of base.txz
| author | Franz Glasner <hg@dom66.de> |
|---|---|
| date | Thu, 15 Aug 2019 17:01:02 +0200 |
| parents | 2e3ac70bdfc8 |
| children | 5aab3a28895f |
| rev | line source |
|---|---|
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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 |
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5 set -e |
| 73 | 6 |
| 7 VERSION="@@VERSION@@" | |
| 8 | |
| 75 | 9 USAGE=" |
| 10 USAGE: fjail [ OPTIONS ] COMMAND [ COMMAND OPTIONS ] [ ARG ... ] | |
| 11 | |
| 12 OPTIONS: | |
| 13 | |
| 14 -h Print this help message to stdout and exit | |
| 15 | |
| 16 COMMANDS: | |
| 17 | |
| 18 datasets [-u] PARENT CHILD | |
| 19 | |
| 20 Create ZFS datasets to be used within a jail | |
| 21 | |
| 22 PARENT must exist already and CHILD must not exist. | |
| 23 | |
| 24 -u Do not automatically mount newly created datasets | |
| 25 | |
| 26 privs MOUNTPOINT | |
| 27 | |
| 28 Adjust some Unix privileges to mounted jail datasets | |
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29 |
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30 populate MOUNTPOINT BASETXZ |
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31 |
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32 Populate the jail directory in MOUNTPOINT with the base system in BASETXZ |
| 75 | 33 " |
| 34 | |
| 35 | |
| 73 | 36 # Reset to standard umask |
| 37 umask 0022 | |
| 38 | |
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39 |
| 73 | 40 # |
| 41 # "datasets" -- create the ZFS dataset tree | |
| 42 # | |
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43 # command_datasets [ -u ] parent-dataset child-dataset |
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44 # |
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45 # -u do not automatically mount newly created datasets |
| 73 | 46 # |
| 47 command_datasets() { | |
| 48 # parent ZFS dataset -- child ZFS dataset name | |
| 49 local _pds _cds | |
| 50 # and its mount point | |
| 51 local _pmp _get _dummy | |
| 52 # full name of the dataset | |
| 53 local _ds | |
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54 # dynamic ZFS options |
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55 local _zfsopts |
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56 |
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57 _zfsopts="" |
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58 while getopts "u" _opt ; do |
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59 case ${_opt} in |
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60 u) |
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61 # do not mount newly created datasets |
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62 _zfsopts="${_zfsopts} -u" |
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63 ;; |
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64 \?|:) |
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65 return 2; |
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66 ;; |
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67 esac |
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68 done |
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69 shift $((OPTIND-1)) |
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70 OPTIND=1 |
| 73 | 71 |
| 72 _pds="$1" | |
| 73 if [ -z "${_pds}" ]; then | |
| 74 echo "ERROR: no parent dataset given" >&2 | |
| 75 return 2 | |
| 76 fi | |
| 77 _get=$(zfs get -H mountpoint "${_pds}" 2>/dev/null) || { echo "ERROR: dataset \`${_pds}' does not exist" >&2; return 1; } | |
| 78 IFS=$'\t' read _dummy _dummy _pmp _dummy <<EOF | |
| 79 ${_get} | |
| 80 EOF | |
| 81 case "${_pmp}" in | |
| 82 none) | |
| 83 echo "ERROR: dataset \`${_pds}' has no mountpoint" >&2 | |
| 84 return 1 | |
| 85 ;; | |
| 86 legacy) | |
| 87 echo "ERROR: dataset \`${_pds}' has a \`${_mp}' mountpoint" >&2 | |
| 88 return 1 | |
| 89 ;; | |
| 90 *) | |
| 91 # VOID | |
| 92 ;; | |
| 93 esac | |
| 94 _cds="$2" | |
| 95 if [ -z "${_cds}" ]; then | |
| 96 echo "ERROR: no child dataset given" >&2 | |
| 97 return 2 | |
| 98 fi | |
| 99 _ds="${_pds}/${_cds}" | |
| 100 echo "Resulting new root dataset is \`${_ds}' at mountpoint \`${_pmp}/${_cds}'" | |
| 101 if zfs get -H mountpoint "${_ds}" >/dev/null 2>/dev/null; then | |
| 102 echo "ERROR: dataset \`${_ds}' does already exist" >&2 | |
| 103 return 1 | |
| 104 fi | |
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105 zfs create ${_zfsopts} -o atime=off "${_ds}" |
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106 zfs create ${_zfsopts} -o sync=disabled -o setuid=off "${_ds}/tmp" |
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107 zfs create ${_zfsopts} "${_ds}/usr" |
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108 zfs create ${_zfsopts} "${_ds}/var" |
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109 zfs create ${_zfsopts} -o exec=off -o setuid=off "${_ds}/var/audit" |
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110 zfs create ${_zfsopts} -o exec=off -o setuid=off "${_ds}/var/cache" |
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111 zfs create ${_zfsopts} -o exec=off -o setuid=off -o compression=off "${_ds}/var/cache/pkg" |
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112 zfs create ${_zfsopts} -o exec=off -o setuid=off -o compression=off "${_ds}/var/crash" |
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113 zfs create ${_zfsopts} -o exec=off -o setuid=off "${_ds}/var/db" |
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114 zfs create ${_zfsopts} -o exec=on -o setuid=off "${_ds}/var/db/pkg" |
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115 zfs create ${_zfsopts} -o readonly=on -o exec=off -o setuid=off "${_ds}/var/empty" |
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116 zfs create ${_zfsopts} -o exec=off -o setuid=off -o primarycache=metadata "${_ds}/var/log" |
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117 zfs create ${_zfsopts} -o exec=off -o setuid=off -o atime=on "${_ds}/var/mail" |
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118 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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119 zfs create ${_zfsopts} -o sync=disabled -o setuid=off "${_ds}/var/tmp" |
| 73 | 120 } |
| 121 | |
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122 |
| 73 | 123 # |
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124 # "populate" -- populate the datasets with content from a FreeBSD base.txz |
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125 # |
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126 # command_populate mountpoint basetxz |
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127 # |
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128 command_populate() { |
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129 # MOUNTPOINT -- base.txz |
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130 local _mp _basetxz |
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131 |
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132 _mp="$1" |
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133 _basetxz="$2" |
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134 |
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135 if [ -z "${_mp}" ]; then |
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136 echo "ERROR: no mountpoint given" >&2 |
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137 return 2 |
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138 fi |
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139 if [ -z "${_basetxz}" ]; then |
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140 echo "ERROR: no base.txz given" >&2 |
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141 return 2 |
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142 fi |
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143 if [ ! -d "${_mp}" ]; then |
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144 echo "ERROR: mountpoint \`${_mp}' does not exist" >&2 |
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145 return 1 |
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146 fi |
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147 if [ ! -r "${_basetxz}" ]; then |
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148 echo "ERROR: file \`${_basetxz}' is not readable" >&2 |
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149 return 1 |
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150 fi |
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151 |
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152 tar -C "${_mp}" --exclude=./var/empty -xJp -f "${_basetxz}" || { echo "ERROR: tar encountered errors" >&2; return 1; } |
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153 } |
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154 |
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155 |
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156 # |
| 73 | 157 # "privs" -- adjust privileges |
| 158 # | |
| 159 # To be used when all ZFS datasets are mounted. | |
| 160 # | |
| 161 command_privs() { | |
| 162 # mountpoint | |
| 163 local _mp _d | |
| 164 | |
| 165 _mp="$1" | |
| 166 if [ -z "${_mp}" ]; then | |
| 167 echo "ERROR: no mountpoint given" >&2 | |
| 168 return 2 | |
| 169 fi | |
| 170 if [ ! -d "${_mp}" ]; then | |
| 171 echo "ERROR: directory \`${_mp}' does not exist" >&2 | |
| 172 return 1 | |
| 173 fi | |
| 174 for _d in tmp var/tmp ; do | |
| 175 chmod 01777 "${_mp}/${_d}" | |
| 176 done | |
| 177 chown root:mail "${_mp}/var/mail" | |
| 178 chmod 0775 "${_mp}/var/mail" | |
| 179 } | |
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180 |
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181 |
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182 # |
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183 # Global option handling |
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184 # |
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185 while getopts "h" _opt ; do |
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186 case ${_opt} in |
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187 h) |
| 75 | 188 echo "${USAGE}" |
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189 exit 0 |
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190 ;; |
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191 \?|:) |
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192 exit 2; |
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193 ;; |
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194 esac |
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195 done |
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196 |
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197 # |
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198 # Reset the Shell's option handling system to prepare for handling |
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199 # command-local options. |
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200 # |
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201 shift $((OPTIND-1)) |
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202 OPTIND=1 |
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203 |
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204 command="$1" |
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205 shift |
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206 |
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207 case "${command}" in |
| 73 | 208 datasets) |
| 209 command_datasets "$@" | |
| 210 ;; | |
| 211 privs) | |
| 212 command_privs "$@" | |
| 213 ;; | |
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214 populate) |
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215 command_populate "$@" |
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216 ;; |
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217 *) |
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218 echo "ERROR: unknown command \`${command}'" >&2 |
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219 exit 2 |
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220 ;; |
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221 esac |