Mercurial > hgrepos > FreeBSD > ports > sysutils > local-bsdtools
annotate bin/fjail @ 77:5aab3a28895f
Implemented a "copy" command to employ zfs send/receive for recursively copying jail datasets
| author | Franz Glasner <hg@dom66.de> |
|---|---|
| date | Thu, 15 Aug 2019 17:52:06 +0200 |
| parents | fea2ef3ff89a |
| children | f5cf08e8d246 |
| 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 -eu |
| 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 |
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33 |
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34 copy SOURCE-DATASET DEST-DATASET |
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35 |
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36 Copy a tree of ZFS datasets with \"zfs send -R\" and \"zfs receive\". |
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37 Note that the destination dataset must not exist already. |
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38 |
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39 -u Do not automatically mount received datasets |
| 75 | 40 " |
| 41 | |
| 42 | |
| 73 | 43 # Reset to standard umask |
| 44 umask 0022 | |
| 45 | |
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46 |
| 73 | 47 # |
| 48 # "datasets" -- create the ZFS dataset tree | |
| 49 # | |
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50 # command_datasets [ -u ] parent-dataset child-dataset |
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51 # |
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52 # -u do not automatically mount newly created datasets |
| 73 | 53 # |
| 54 command_datasets() { | |
| 55 # parent ZFS dataset -- child ZFS dataset name | |
| 56 local _pds _cds | |
| 57 # and its mount point | |
| 58 local _pmp _get _dummy | |
| 59 # full name of the dataset | |
| 60 local _ds | |
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61 # dynamic ZFS options |
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62 local _zfsopts |
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63 |
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64 _zfsopts="" |
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65 while getopts "u" _opt ; do |
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66 case ${_opt} in |
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67 u) |
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68 # do not mount newly created datasets |
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69 _zfsopts="${_zfsopts} -u" |
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70 ;; |
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71 \?|:) |
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72 return 2; |
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73 ;; |
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74 esac |
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75 done |
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76 shift $((OPTIND-1)) |
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77 OPTIND=1 |
| 73 | 78 |
| 79 _pds="$1" | |
| 80 if [ -z "${_pds}" ]; then | |
| 81 echo "ERROR: no parent dataset given" >&2 | |
| 82 return 2 | |
| 83 fi | |
| 84 _get=$(zfs get -H mountpoint "${_pds}" 2>/dev/null) || { echo "ERROR: dataset \`${_pds}' does not exist" >&2; return 1; } | |
| 85 IFS=$'\t' read _dummy _dummy _pmp _dummy <<EOF | |
| 86 ${_get} | |
| 87 EOF | |
| 88 case "${_pmp}" in | |
| 89 none) | |
| 90 echo "ERROR: dataset \`${_pds}' has no mountpoint" >&2 | |
| 91 return 1 | |
| 92 ;; | |
| 93 legacy) | |
| 94 echo "ERROR: dataset \`${_pds}' has a \`${_mp}' mountpoint" >&2 | |
| 95 return 1 | |
| 96 ;; | |
| 97 *) | |
| 98 # VOID | |
| 99 ;; | |
| 100 esac | |
| 101 _cds="$2" | |
| 102 if [ -z "${_cds}" ]; then | |
| 103 echo "ERROR: no child dataset given" >&2 | |
| 104 return 2 | |
| 105 fi | |
| 106 _ds="${_pds}/${_cds}" | |
| 107 echo "Resulting new root dataset is \`${_ds}' at mountpoint \`${_pmp}/${_cds}'" | |
| 108 if zfs get -H mountpoint "${_ds}" >/dev/null 2>/dev/null; then | |
| 109 echo "ERROR: dataset \`${_ds}' does already exist" >&2 | |
| 110 return 1 | |
| 111 fi | |
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112 zfs create ${_zfsopts} -o atime=off "${_ds}" |
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113 zfs create ${_zfsopts} -o sync=disabled -o setuid=off "${_ds}/tmp" |
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114 zfs create ${_zfsopts} "${_ds}/usr" |
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115 zfs create ${_zfsopts} "${_ds}/var" |
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116 zfs create ${_zfsopts} -o exec=off -o setuid=off "${_ds}/var/audit" |
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117 zfs create ${_zfsopts} -o exec=off -o setuid=off "${_ds}/var/cache" |
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118 zfs create ${_zfsopts} -o exec=off -o setuid=off -o compression=off "${_ds}/var/cache/pkg" |
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119 zfs create ${_zfsopts} -o exec=off -o setuid=off -o compression=off "${_ds}/var/crash" |
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120 zfs create ${_zfsopts} -o exec=off -o setuid=off "${_ds}/var/db" |
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121 zfs create ${_zfsopts} -o exec=on -o setuid=off "${_ds}/var/db/pkg" |
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122 zfs create ${_zfsopts} -o readonly=on -o exec=off -o setuid=off "${_ds}/var/empty" |
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123 zfs create ${_zfsopts} -o exec=off -o setuid=off -o primarycache=metadata "${_ds}/var/log" |
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124 zfs create ${_zfsopts} -o exec=off -o setuid=off -o atime=on "${_ds}/var/mail" |
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125 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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126 zfs create ${_zfsopts} -o sync=disabled -o setuid=off "${_ds}/var/tmp" |
| 73 | 127 } |
| 128 | |
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129 |
| 73 | 130 # |
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131 # "populate" -- populate the datasets with content from a FreeBSD base.txz |
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132 # |
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133 # command_populate mountpoint basetxz |
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134 # |
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135 command_populate() { |
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136 # MOUNTPOINT -- base.txz |
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137 local _mp _basetxz |
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138 |
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139 _mp="$1" |
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140 _basetxz="$2" |
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141 |
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142 if [ -z "${_mp}" ]; then |
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143 echo "ERROR: no mountpoint given" >&2 |
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144 return 2 |
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145 fi |
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146 if [ -z "${_basetxz}" ]; then |
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147 echo "ERROR: no base.txz given" >&2 |
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148 return 2 |
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149 fi |
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150 if [ ! -d "${_mp}" ]; then |
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151 echo "ERROR: mountpoint \`${_mp}' does not exist" >&2 |
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152 return 1 |
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153 fi |
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154 if [ ! -r "${_basetxz}" ]; then |
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155 echo "ERROR: file \`${_basetxz}' is not readable" >&2 |
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156 return 1 |
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157 fi |
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158 |
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159 tar -C "${_mp}" --exclude=./var/empty -xJp -f "${_basetxz}" || { echo "ERROR: tar encountered errors" >&2; return 1; } |
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160 } |
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161 |
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162 |
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163 # |
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164 # "copy" -- ZFS copy of datasets |
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165 # |
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166 # command_copy source-dataset destination-dataset |
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167 # |
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168 command_copy() { |
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169 # source dataset -- destination dataset |
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170 local _source _dest |
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171 # dynamic ZFS options |
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172 local _zfsopts |
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173 |
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174 _zfsopts="" |
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175 while getopts "u" _opt ; do |
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176 case ${_opt} in |
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177 u) |
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178 # do not mount newly created datasets |
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179 _zfsopts="${_zfsopts} -u" |
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180 ;; |
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181 \?|:) |
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182 return 2; |
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183 ;; |
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184 esac |
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185 done |
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186 shift $((OPTIND-1)) |
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187 OPTIND=1 |
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188 |
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189 _source="$1" |
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190 if [ -z "${_source}" ]; then |
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191 echo "ERROR: no source dataset given" >&2 |
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192 return 2 |
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193 fi |
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194 _dest="$2" |
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195 if [ -z "${_dest}" ]; then |
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196 echo "ERROR: no source dataset given" >&2 |
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197 return 2 |
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198 fi |
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199 zfs send -R -n -v ${_source} || { echo "ERROR: ZFS operation failed in no-op mode" >&2; return 1; } |
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200 zfs send -R "${_source}" | zfs receive ${_zfsopts} "${_dest}" || { echo "ERROR: ZFS operation failed" >&2; return 1; } |
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201 } |
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202 |
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203 |
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204 # |
| 73 | 205 # "privs" -- adjust privileges |
| 206 # | |
| 207 # To be used when all ZFS datasets are mounted. | |
| 208 # | |
| 209 command_privs() { | |
| 210 # mountpoint | |
| 211 local _mp _d | |
| 212 | |
| 213 _mp="$1" | |
| 214 if [ -z "${_mp}" ]; then | |
| 215 echo "ERROR: no mountpoint given" >&2 | |
| 216 return 2 | |
| 217 fi | |
| 218 if [ ! -d "${_mp}" ]; then | |
| 219 echo "ERROR: directory \`${_mp}' does not exist" >&2 | |
| 220 return 1 | |
| 221 fi | |
| 222 for _d in tmp var/tmp ; do | |
| 223 chmod 01777 "${_mp}/${_d}" | |
| 224 done | |
| 225 chown root:mail "${_mp}/var/mail" | |
| 226 chmod 0775 "${_mp}/var/mail" | |
| 227 } | |
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228 |
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229 |
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230 # |
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231 # Global option handling |
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232 # |
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233 while getopts "h" _opt ; do |
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234 case ${_opt} in |
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235 h) |
| 75 | 236 echo "${USAGE}" |
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237 exit 0 |
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238 ;; |
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239 \?|:) |
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240 exit 2; |
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241 ;; |
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242 esac |
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243 done |
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244 |
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245 # |
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246 # Reset the Shell's option handling system to prepare for handling |
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247 # command-local options. |
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248 # |
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249 shift $((OPTIND-1)) |
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250 OPTIND=1 |
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251 |
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252 command="$1" |
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253 shift |
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254 |
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255 case "${command}" in |
| 73 | 256 datasets) |
| 257 command_datasets "$@" | |
| 258 ;; | |
| 259 privs) | |
| 260 command_privs "$@" | |
| 261 ;; | |
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262 populate) |
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263 command_populate "$@" |
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264 ;; |
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265 copy) |
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266 command_copy "$@" |
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267 ;; |
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268 *) |
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269 echo "ERROR: unknown command \`${command}'" >&2 |
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270 exit 2 |
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271 ;; |
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272 esac |