Mercurial > hgrepos > FreeBSD > ports > sysutils > local-bsdtools
annotate bin/fjail @ 81:124faa20ae80
Implemented a "-V" global option to print the program's name and version number to stdout
| author | Franz Glasner <fzglas.hg@dom66.de> |
|---|---|
| date | Fri, 16 Aug 2019 09:16:27 +0200 |
| parents | f5cf08e8d246 |
| children | 56dd768b5fdd |
| 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 | |
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14 -V Print the program name and version number to stdout and exit |
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15 |
| 75 | 16 -h Print this help message to stdout and exit |
| 17 | |
| 18 COMMANDS: | |
| 19 | |
| 20 datasets [-u] PARENT CHILD | |
| 21 | |
| 22 Create ZFS datasets to be used within a jail | |
| 23 | |
| 24 PARENT must exist already and CHILD must not exist. | |
| 25 | |
| 26 -u Do not automatically mount newly created datasets | |
| 27 | |
| 28 privs MOUNTPOINT | |
| 29 | |
| 30 Adjust some Unix privileges to mounted jail datasets | |
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31 |
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32 populate MOUNTPOINT BASETXZ |
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33 |
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34 Populate the jail directory in MOUNTPOINT with the base system in BASETXZ |
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35 |
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36 copy SOURCE-DATASET DEST-DATASET |
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37 |
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38 Copy a tree of ZFS datasets with \"zfs send -R\" and \"zfs receive\". |
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39 Note that the destination dataset must not exist already. |
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40 |
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41 -u Do not automatically mount received datasets |
| 75 | 42 " |
| 43 | |
| 44 | |
| 73 | 45 # Reset to standard umask |
| 46 umask 0022 | |
| 47 | |
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48 |
| 73 | 49 # |
| 50 # "datasets" -- create the ZFS dataset tree | |
| 51 # | |
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52 # command_datasets [ -u ] parent-dataset child-dataset |
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53 # |
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54 # -u do not automatically mount newly created datasets |
| 73 | 55 # |
| 56 command_datasets() { | |
| 57 # parent ZFS dataset -- child ZFS dataset name | |
| 58 local _pds _cds | |
| 59 # and its mount point | |
| 60 local _pmp _get _dummy | |
| 61 # full name of the dataset | |
| 62 local _ds | |
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63 # dynamic ZFS options |
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64 local _zfsopts |
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65 |
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66 _zfsopts="" |
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67 while getopts "u" _opt ; do |
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68 case ${_opt} in |
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69 u) |
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70 # do not mount newly created datasets |
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71 _zfsopts="${_zfsopts} -u" |
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72 ;; |
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73 \?|:) |
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74 return 2; |
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75 ;; |
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76 esac |
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77 done |
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78 shift $((OPTIND-1)) |
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79 OPTIND=1 |
| 73 | 80 |
| 81 _pds="$1" | |
| 82 if [ -z "${_pds}" ]; then | |
| 83 echo "ERROR: no parent dataset given" >&2 | |
| 84 return 2 | |
| 85 fi | |
| 86 _get=$(zfs get -H mountpoint "${_pds}" 2>/dev/null) || { echo "ERROR: dataset \`${_pds}' does not exist" >&2; return 1; } | |
| 87 IFS=$'\t' read _dummy _dummy _pmp _dummy <<EOF | |
| 88 ${_get} | |
| 89 EOF | |
| 90 case "${_pmp}" in | |
| 91 none) | |
| 92 echo "ERROR: dataset \`${_pds}' has no mountpoint" >&2 | |
| 93 return 1 | |
| 94 ;; | |
| 95 legacy) | |
| 96 echo "ERROR: dataset \`${_pds}' has a \`${_mp}' mountpoint" >&2 | |
| 97 return 1 | |
| 98 ;; | |
| 99 *) | |
| 100 # VOID | |
| 101 ;; | |
| 102 esac | |
| 103 _cds="$2" | |
| 104 if [ -z "${_cds}" ]; then | |
| 105 echo "ERROR: no child dataset given" >&2 | |
| 106 return 2 | |
| 107 fi | |
| 108 _ds="${_pds}/${_cds}" | |
| 109 echo "Resulting new root dataset is \`${_ds}' at mountpoint \`${_pmp}/${_cds}'" | |
| 110 if zfs get -H mountpoint "${_ds}" >/dev/null 2>/dev/null; then | |
| 111 echo "ERROR: dataset \`${_ds}' does already exist" >&2 | |
| 112 return 1 | |
| 113 fi | |
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114 zfs create ${_zfsopts} -o atime=off "${_ds}" |
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115 zfs create ${_zfsopts} -o sync=disabled -o setuid=off "${_ds}/tmp" |
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116 zfs create ${_zfsopts} "${_ds}/usr" |
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117 zfs create ${_zfsopts} "${_ds}/var" |
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118 zfs create ${_zfsopts} -o exec=off -o setuid=off "${_ds}/var/audit" |
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119 zfs create ${_zfsopts} -o exec=off -o setuid=off "${_ds}/var/cache" |
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120 zfs create ${_zfsopts} -o exec=off -o setuid=off -o compression=off "${_ds}/var/cache/pkg" |
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121 zfs create ${_zfsopts} -o exec=off -o setuid=off -o compression=off "${_ds}/var/crash" |
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122 zfs create ${_zfsopts} -o exec=off -o setuid=off "${_ds}/var/db" |
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123 zfs create ${_zfsopts} -o exec=on -o setuid=off "${_ds}/var/db/pkg" |
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124 zfs create ${_zfsopts} -o readonly=on -o exec=off -o setuid=off "${_ds}/var/empty" |
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125 zfs create ${_zfsopts} -o exec=off -o setuid=off -o primarycache=metadata "${_ds}/var/log" |
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126 zfs create ${_zfsopts} -o exec=off -o setuid=off -o atime=on "${_ds}/var/mail" |
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127 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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128 zfs create ${_zfsopts} -o sync=disabled -o setuid=off "${_ds}/var/tmp" |
| 73 | 129 } |
| 130 | |
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131 |
| 73 | 132 # |
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133 # "populate" -- populate the datasets with content from a FreeBSD base.txz |
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134 # |
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135 # command_populate mountpoint basetxz |
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136 # |
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137 command_populate() { |
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138 # MOUNTPOINT -- base.txz |
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139 local _mp _basetxz |
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140 |
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141 _mp="$1" |
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142 _basetxz="$2" |
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143 |
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144 if [ -z "${_mp}" ]; then |
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145 echo "ERROR: no mountpoint given" >&2 |
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146 return 2 |
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147 fi |
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148 if [ -z "${_basetxz}" ]; then |
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149 echo "ERROR: no base.txz given" >&2 |
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150 return 2 |
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151 fi |
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152 if [ ! -d "${_mp}" ]; then |
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153 echo "ERROR: mountpoint \`${_mp}' does not exist" >&2 |
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154 return 1 |
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155 fi |
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156 if [ ! -r "${_basetxz}" ]; then |
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157 echo "ERROR: file \`${_basetxz}' is not readable" >&2 |
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158 return 1 |
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159 fi |
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160 |
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161 tar -C "${_mp}" --exclude=./var/empty -xJp -f "${_basetxz}" || { echo "ERROR: tar encountered errors" >&2; return 1; } |
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162 } |
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163 |
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164 |
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165 # |
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166 # "copy" -- ZFS copy of datasets |
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167 # |
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168 # command_copy source-dataset destination-dataset |
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169 # |
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170 command_copy() { |
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171 # source dataset -- destination dataset |
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172 local _source _dest |
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173 # dynamic ZFS options |
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174 local _zfsopts |
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175 |
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176 _zfsopts="" |
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177 while getopts "u" _opt ; do |
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178 case ${_opt} in |
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179 u) |
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180 # do not mount newly created datasets |
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181 _zfsopts="${_zfsopts} -u" |
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182 ;; |
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183 \?|:) |
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184 return 2; |
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185 ;; |
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186 esac |
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187 done |
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188 shift $((OPTIND-1)) |
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189 OPTIND=1 |
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190 |
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191 _source="$1" |
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192 if [ -z "${_source}" ]; then |
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193 echo "ERROR: no source dataset given" >&2 |
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194 return 2 |
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195 fi |
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196 _dest="$2" |
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197 if [ -z "${_dest}" ]; then |
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198 echo "ERROR: no source dataset given" >&2 |
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199 return 2 |
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200 fi |
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201 zfs send -R -n -v ${_source} || { echo "ERROR: ZFS operation failed in no-op mode" >&2; return 1; } |
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202 zfs send -R "${_source}" | zfs receive ${_zfsopts} "${_dest}" || { echo "ERROR: ZFS operation failed" >&2; return 1; } |
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203 } |
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204 |
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205 |
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206 # |
| 73 | 207 # "privs" -- adjust privileges |
| 208 # | |
| 209 # To be used when all ZFS datasets are mounted. | |
| 210 # | |
| 211 command_privs() { | |
| 212 # mountpoint | |
| 213 local _mp _d | |
| 214 | |
| 215 _mp="$1" | |
| 216 if [ -z "${_mp}" ]; then | |
| 217 echo "ERROR: no mountpoint given" >&2 | |
| 218 return 2 | |
| 219 fi | |
| 220 if [ ! -d "${_mp}" ]; then | |
| 221 echo "ERROR: directory \`${_mp}' does not exist" >&2 | |
| 222 return 1 | |
| 223 fi | |
| 224 for _d in tmp var/tmp ; do | |
| 225 chmod 01777 "${_mp}/${_d}" | |
| 226 done | |
| 227 chown root:mail "${_mp}/var/mail" | |
| 228 chmod 0775 "${_mp}/var/mail" | |
| 229 } | |
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230 |
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231 |
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232 # |
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233 # Global option handling |
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234 # |
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235 while getopts "Vh" _opt ; do |
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236 case ${_opt} in |
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237 V) |
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238 echo "fjail v${VERSION} (rv:@@HGREVISION@@)" |
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239 exit 0 |
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240 ;; |
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241 h) |
| 75 | 242 echo "${USAGE}" |
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243 exit 0 |
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244 ;; |
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80
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245 \?) |
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246 exit 2; |
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247 ;; |
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248 *) |
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249 echo "ERROR: option handling failed" >&2 |
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250 exit 2 |
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251 ;; |
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252 esac |
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253 done |
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254 |
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255 # |
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256 # Reset the Shell's option handling system to prepare for handling |
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257 # command-local options. |
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258 # |
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259 shift $((OPTIND-1)) |
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260 OPTIND=1 |
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261 |
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262 command="$1" |
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263 shift |
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264 |
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265 case "${command}" in |
| 73 | 266 datasets) |
| 267 command_datasets "$@" | |
| 268 ;; | |
| 269 privs) | |
| 270 command_privs "$@" | |
| 271 ;; | |
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272 populate) |
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273 command_populate "$@" |
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274 ;; |
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275 copy) |
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276 command_copy "$@" |
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277 ;; |
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278 *) |
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279 echo "ERROR: unknown command \`${command}'" >&2 |
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280 exit 2 |
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281 ;; |
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282 esac |