Mercurial > hgrepos > FreeBSD > ports > sysutils > local-bsdtools
annotate bin/fjail @ 86:a3b9d4fe560e
Provide "module" doc-strings
| author | Franz Glasner <fzglas.hg@dom66.de> |
|---|---|
| date | Thu, 05 Sep 2019 02:29:44 +0200 |
| parents | 56dd768b5fdd |
| children | a8e76893140f |
| rev | line source |
|---|---|
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1 #!/bin/sh |
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2 # -*- indent-tabs-mode: nil; -*- |
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3 : 'A very minimal BSD Jail management tool. |
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4 |
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5 :Author: Franz Glasner |
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6 :Copyright: (c) 2019 Franz Glasner. |
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7 All rights reserved. |
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8 :License: 3-Clause BSD License. |
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9 See LICENSE for details. |
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10 If you cannot find LICENSE see |
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11 <https://opensource.org/licenses/BSD-3-Clause> |
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12 :Id: @(#)@@PKGORIGIN@@ $HGid$ |
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13 |
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14 ' |
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15 |
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16 set -eu |
| 73 | 17 |
| 18 VERSION="@@VERSION@@" | |
| 19 | |
| 75 | 20 USAGE=" |
| 21 USAGE: fjail [ OPTIONS ] COMMAND [ COMMAND OPTIONS ] [ ARG ... ] | |
| 22 | |
| 23 OPTIONS: | |
| 24 | |
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25 -V Print the program name and version number to stdout and exit |
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26 |
| 75 | 27 -h Print this help message to stdout and exit |
| 28 | |
| 29 COMMANDS: | |
| 30 | |
| 31 datasets [-u] PARENT CHILD | |
| 32 | |
| 33 Create ZFS datasets to be used within a jail | |
| 34 | |
| 35 PARENT must exist already and CHILD must not exist. | |
| 36 | |
| 37 -u Do not automatically mount newly created datasets | |
| 38 | |
| 39 privs MOUNTPOINT | |
| 40 | |
| 41 Adjust some Unix privileges to mounted jail datasets | |
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42 |
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43 populate MOUNTPOINT BASETXZ |
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44 |
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45 Populate the jail directory in MOUNTPOINT with the base system in BASETXZ |
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46 |
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47 copy SOURCE-DATASET DEST-DATASET |
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48 |
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49 Copy a tree of ZFS datasets with \"zfs send -R\" and \"zfs receive\". |
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50 Note that the destination dataset must not exist already. |
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51 |
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52 -u Do not automatically mount received datasets |
| 75 | 53 " |
| 54 | |
| 55 | |
| 73 | 56 # Reset to standard umask |
| 57 umask 0022 | |
| 58 | |
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59 |
| 73 | 60 # |
| 61 # "datasets" -- create the ZFS dataset tree | |
| 62 # | |
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63 # command_datasets [ -u ] parent-dataset child-dataset |
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64 # |
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65 # -u do not automatically mount newly created datasets |
| 73 | 66 # |
| 67 command_datasets() { | |
| 68 # parent ZFS dataset -- child ZFS dataset name | |
| 69 local _pds _cds | |
| 70 # and its mount point | |
| 71 local _pmp _get _dummy | |
| 72 # full name of the dataset | |
| 73 local _ds | |
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74 # dynamic ZFS options |
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75 local _zfsopts |
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76 |
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77 _zfsopts="" |
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78 while getopts "u" _opt ; do |
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79 case ${_opt} in |
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80 u) |
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81 # do not mount newly created datasets |
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82 _zfsopts="${_zfsopts} -u" |
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83 ;; |
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84 \?|:) |
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85 return 2; |
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86 ;; |
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87 esac |
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88 done |
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89 shift $((OPTIND-1)) |
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90 OPTIND=1 |
| 73 | 91 |
| 92 _pds="$1" | |
| 93 if [ -z "${_pds}" ]; then | |
| 94 echo "ERROR: no parent dataset given" >&2 | |
| 95 return 2 | |
| 96 fi | |
| 97 _get=$(zfs get -H mountpoint "${_pds}" 2>/dev/null) || { echo "ERROR: dataset \`${_pds}' does not exist" >&2; return 1; } | |
| 98 IFS=$'\t' read _dummy _dummy _pmp _dummy <<EOF | |
| 99 ${_get} | |
| 100 EOF | |
| 101 case "${_pmp}" in | |
| 102 none) | |
| 103 echo "ERROR: dataset \`${_pds}' has no mountpoint" >&2 | |
| 104 return 1 | |
| 105 ;; | |
| 106 legacy) | |
| 107 echo "ERROR: dataset \`${_pds}' has a \`${_mp}' mountpoint" >&2 | |
| 108 return 1 | |
| 109 ;; | |
| 110 *) | |
| 111 # VOID | |
| 112 ;; | |
| 113 esac | |
| 114 _cds="$2" | |
| 115 if [ -z "${_cds}" ]; then | |
| 116 echo "ERROR: no child dataset given" >&2 | |
| 117 return 2 | |
| 118 fi | |
| 119 _ds="${_pds}/${_cds}" | |
| 120 echo "Resulting new root dataset is \`${_ds}' at mountpoint \`${_pmp}/${_cds}'" | |
| 121 if zfs get -H mountpoint "${_ds}" >/dev/null 2>/dev/null; then | |
| 122 echo "ERROR: dataset \`${_ds}' does already exist" >&2 | |
| 123 return 1 | |
| 124 fi | |
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125 zfs create ${_zfsopts} -o atime=off "${_ds}" |
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126 zfs create ${_zfsopts} -o sync=disabled -o setuid=off "${_ds}/tmp" |
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127 zfs create ${_zfsopts} "${_ds}/usr" |
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128 zfs create ${_zfsopts} "${_ds}/var" |
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129 zfs create ${_zfsopts} -o exec=off -o setuid=off "${_ds}/var/audit" |
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130 zfs create ${_zfsopts} -o exec=off -o setuid=off "${_ds}/var/cache" |
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131 zfs create ${_zfsopts} -o exec=off -o setuid=off -o compression=off "${_ds}/var/cache/pkg" |
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132 zfs create ${_zfsopts} -o exec=off -o setuid=off -o compression=off "${_ds}/var/crash" |
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133 zfs create ${_zfsopts} -o exec=off -o setuid=off "${_ds}/var/db" |
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134 zfs create ${_zfsopts} -o exec=on -o setuid=off "${_ds}/var/db/pkg" |
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135 zfs create ${_zfsopts} -o readonly=on -o exec=off -o setuid=off "${_ds}/var/empty" |
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136 zfs create ${_zfsopts} -o exec=off -o setuid=off -o primarycache=metadata "${_ds}/var/log" |
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137 zfs create ${_zfsopts} -o exec=off -o setuid=off -o atime=on "${_ds}/var/mail" |
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138 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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139 zfs create ${_zfsopts} -o sync=disabled -o setuid=off "${_ds}/var/tmp" |
| 73 | 140 } |
| 141 | |
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142 |
| 73 | 143 # |
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144 # "populate" -- populate the datasets with content from a FreeBSD base.txz |
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145 # |
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146 # command_populate mountpoint basetxz |
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147 # |
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148 command_populate() { |
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149 # MOUNTPOINT -- base.txz |
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150 local _mp _basetxz |
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151 |
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152 _mp="$1" |
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153 _basetxz="$2" |
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154 |
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155 if [ -z "${_mp}" ]; then |
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156 echo "ERROR: no mountpoint given" >&2 |
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157 return 2 |
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158 fi |
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159 if [ -z "${_basetxz}" ]; then |
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160 echo "ERROR: no base.txz given" >&2 |
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161 return 2 |
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162 fi |
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163 if [ ! -d "${_mp}" ]; then |
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164 echo "ERROR: mountpoint \`${_mp}' does not exist" >&2 |
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165 return 1 |
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166 fi |
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167 if [ ! -r "${_basetxz}" ]; then |
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168 echo "ERROR: file \`${_basetxz}' is not readable" >&2 |
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169 return 1 |
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170 fi |
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171 |
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172 tar -C "${_mp}" --exclude=./var/empty -xJp -f "${_basetxz}" || { echo "ERROR: tar encountered errors" >&2; return 1; } |
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173 } |
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174 |
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175 |
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176 # |
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177 # "copy" -- ZFS copy of datasets |
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178 # |
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179 # command_copy source-dataset destination-dataset |
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180 # |
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181 command_copy() { |
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182 # source dataset -- destination dataset |
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183 local _source _dest |
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184 # dynamic ZFS options |
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185 local _zfsopts |
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186 |
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187 _zfsopts="" |
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188 while getopts "u" _opt ; do |
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189 case ${_opt} in |
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190 u) |
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191 # do not mount newly created datasets |
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192 _zfsopts="${_zfsopts} -u" |
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193 ;; |
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194 \?|:) |
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195 return 2; |
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196 ;; |
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197 esac |
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198 done |
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199 shift $((OPTIND-1)) |
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200 OPTIND=1 |
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201 |
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202 _source="$1" |
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203 if [ -z "${_source}" ]; then |
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204 echo "ERROR: no source dataset given" >&2 |
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205 return 2 |
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206 fi |
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207 _dest="$2" |
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208 if [ -z "${_dest}" ]; then |
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209 echo "ERROR: no source dataset given" >&2 |
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210 return 2 |
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211 fi |
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212 zfs send -R -n -v ${_source} || { echo "ERROR: ZFS operation failed in no-op mode" >&2; return 1; } |
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213 zfs send -R "${_source}" | zfs receive ${_zfsopts} "${_dest}" || { echo "ERROR: ZFS operation failed" >&2; return 1; } |
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214 } |
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215 |
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216 |
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217 # |
| 73 | 218 # "privs" -- adjust privileges |
| 219 # | |
| 220 # To be used when all ZFS datasets are mounted. | |
| 221 # | |
| 222 command_privs() { | |
| 223 # mountpoint | |
| 224 local _mp _d | |
| 225 | |
| 226 _mp="$1" | |
| 227 if [ -z "${_mp}" ]; then | |
| 228 echo "ERROR: no mountpoint given" >&2 | |
| 229 return 2 | |
| 230 fi | |
| 231 if [ ! -d "${_mp}" ]; then | |
| 232 echo "ERROR: directory \`${_mp}' does not exist" >&2 | |
| 233 return 1 | |
| 234 fi | |
| 235 for _d in tmp var/tmp ; do | |
| 236 chmod 01777 "${_mp}/${_d}" | |
| 237 done | |
| 238 chown root:mail "${_mp}/var/mail" | |
| 239 chmod 0775 "${_mp}/var/mail" | |
| 240 } | |
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241 |
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242 |
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243 # |
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244 # Global option handling |
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245 # |
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246 while getopts "Vh" _opt ; do |
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247 case ${_opt} in |
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248 V) |
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249 echo "fjail v${VERSION} (rv:@@HGREVISION@@)" |
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250 exit 0 |
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251 ;; |
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252 h) |
| 75 | 253 echo "${USAGE}" |
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254 exit 0 |
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255 ;; |
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80
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256 \?) |
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257 exit 2; |
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258 ;; |
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259 *) |
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260 echo "ERROR: option handling failed" >&2 |
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261 exit 2 |
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262 ;; |
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263 esac |
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264 done |
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265 |
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266 # |
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267 # Reset the Shell's option handling system to prepare for handling |
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268 # command-local options. |
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269 # |
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270 shift $((OPTIND-1)) |
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271 OPTIND=1 |
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272 |
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273 command="$1" |
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274 shift |
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275 |
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276 case "${command}" in |
| 73 | 277 datasets) |
| 278 command_datasets "$@" | |
| 279 ;; | |
| 280 privs) | |
| 281 command_privs "$@" | |
| 282 ;; | |
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283 populate) |
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284 command_populate "$@" |
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285 ;; |
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286 copy) |
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287 command_copy "$@" |
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288 ;; |
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289 *) |
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290 echo "ERROR: unknown command \`${command}'" >&2 |
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291 exit 2 |
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292 ;; |
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293 esac |