Mercurial > hgrepos > FreeBSD > ports > sysutils > local-bsdtools
annotate sbin/ftjail @ 235:85aea8ca1ab8
Some work on datasets-tmpl
| author | Franz Glasner <fzglas.hg@dom66.de> |
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| date | Thu, 08 Sep 2022 09:43:31 +0200 |
| parents | 8682cfa74f6a |
| children | 661e35a9d6e5 |
| 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 Thin Jail management tool. |
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4 |
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5 :Author: Franz Glasner |
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6 :Copyright: (c) 2022 Franz Glasner. |
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7 All rights reserved. |
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8 :License: BSD 3-Clause "New" or "Revised" 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 |
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17 |
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18 VERSION="@@VERSION@@" |
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19 |
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20 USAGE=' |
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21 USAGE: ftjail [ OPTIONS ] COMMAND [ COMMAND OPTIONS ] [ ARG ... ] |
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22 |
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23 OPTIONS: |
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24 |
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25 -V Print the program name and version number to stdout and exit |
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26 |
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27 -h Print this help message to stdout and exit |
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28 |
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29 COMMANDS: |
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30 |
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31 datasets-tmpl [OPTIONS] PARENT-BASE PARENT-SKELETON NAME |
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32 |
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33 Create the ZFS template datasets, i.e. the ro base and the rw |
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34 skeleton to be used within thin jails jails |
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35 |
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36 PARENT-BASE and PARENT-SKELETON must exist already and NAME must |
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37 not exist. |
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38 |
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39 The datasets will not be mounted. |
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40 |
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41 ENVIRONMENT: |
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42 |
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43 All environment variables that affect "zfs" are effective also. |
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44 |
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45 DESCRIPTION: |
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46 |
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47 All commands with the exception of "populate" require ZFS as |
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48 filesystem. |
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49 ' |
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50 |
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51 # Reset to standard umask |
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52 umask 0022 |
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53 |
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54 |
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55 _get_dataset_for_mountpoint() { |
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56 : 'Use `mount -t zfs -p` to determine the ZFS dataset for a given mountpoint. |
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57 |
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58 ' |
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59 local _mountpoint |
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60 local _ds _mount _rest |
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61 |
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62 _mountpoint="$1" |
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63 |
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64 mount -t zfs -p \ |
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65 | { |
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66 while IFS=' '$'\t' read -r _ds _mount _rest ; do |
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67 if [ "$_mount" = "$_mountpoint" ]; then |
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68 echo "${_ds}" |
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69 return 0 |
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70 fi |
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71 done |
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72 return 1 |
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73 } |
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74 } |
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75 |
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76 |
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77 # |
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78 # "datasets-tmpl" -- create the ZFS dataset tree |
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79 # |
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80 # PARENT-BASE PARENT-SKELETON NAME |
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81 # |
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82 command_datasets_tmpl() { |
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83 # parent ZFS dataset -- child ZFS dataset name |
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84 local _p_base _p_skel _name |
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85 local _zfsopts |
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86 local _ds_base _ds_skel |
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87 |
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88 _zfsopts="-u -o canmount=noauto" |
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89 |
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90 _p_base="$1" |
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91 _p_skel="$2" |
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92 _name="$3" |
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93 |
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94 if [ -z "${_p_base}" ]; then |
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95 echo "ERROR: no parent dataset for base given" >&2 |
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96 return 2 |
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97 fi |
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98 if [ -z "${_p_skel}" ]; then |
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99 echo "ERROR: no parent dataset for skeleton given" >&2 |
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100 return 2 |
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101 fi |
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102 if [ -z "${_name}" ]; then |
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103 echo "ERROR: no name given" >&2 |
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104 return 2 |
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105 fi |
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106 |
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107 _ds_base="${_p_base}/${_name}" |
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108 _ds_skel="${_p_skel}/${_name}" |
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109 echo "Resulting new root datasets:" |
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110 printf "\\t%s\\n" "${_ds_base}" |
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111 printf "\\t%s\\n" "${_ds_skel}" |
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112 if ! zfs list -H -o mountpoint -t filesystem "${_p_base}" >/dev/null 2>/dev/null; then |
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113 echo "ERROR: parent dataset \`${_p_base}' does not exist" >&2 |
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233
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114 return 1 |
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115 fi |
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235
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116 if zfs list -H -o mountpoint -t filesystem "${_ds_base}" >/dev/null 2>/dev/null; then |
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117 echo "ERROR: dataset \`${_ds_base}' does already exist" >&2 |
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118 return 1 |
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119 fi |
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120 if ! zfs list -H -o mountpoint -t filesystem "${_p_skel}" >/dev/null 2>/dev/null; then |
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121 echo "ERROR: parent dataset \`${_p_skel}' does not exist" >&2 |
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122 return 1 |
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123 fi |
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124 if zfs list -H -o mountpoint -t filesystem "${_ds_skel}" >/dev/null 2>/dev/null; then |
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125 echo "ERROR: dataset \`${_ds_skel}' does already exist" >&2 |
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126 return 1 |
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127 fi |
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128 return 0 |
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129 |
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130 # |
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131 # NOTE: For BEs these directory will be *excluded* from the BE |
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132 # |
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133 # /tmp |
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134 # /usr/home |
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135 # /usr/ports |
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136 # /usr/src |
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137 # /var/audit |
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138 # /var/crash |
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139 # /var/log |
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140 # /var/mail |
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141 # /var/tmp |
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142 # |
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143 zfs create ${_zfsopts} ${_zfsnoauto} -o atime=off "${_ds}" |
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144 zfs create ${_zfsopts} ${_zfsnoauto} -o sync=disabled -o setuid=off "${_ds}/tmp" |
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145 if [ "${_tiny}" != "extra" ]; then |
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146 if [ "${_tiny}" = "yes" ]; then |
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147 zfs create ${_zfsopts} -o canmount=off "${_ds}/usr" |
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148 else |
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149 zfs create ${_zfsopts} ${_zfsnoauto} "${_ds}/usr" |
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150 fi |
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151 zfs create ${_zfsopts} ${_zfsnoauto} -o setuid=off "${_ds}/usr/home" |
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152 zfs create ${_zfsopts} ${_zfsnoauto} "${_ds}/usr/local" |
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153 fi |
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154 if [ \( "${_tiny}" = "yes" \) -o \( "${_tiny}" = "extra" \) ]; then |
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155 zfs create ${_zfsopts} -o canmount=off "${_ds}/var" |
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156 else |
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157 zfs create ${_zfsopts} ${_zfsnoauto} "${_ds}/var" |
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158 fi |
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159 if [ "${_tiny}" != "extra" ]; then |
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160 zfs create ${_zfsopts} ${_zfsnoauto} -o exec=off -o setuid=off "${_ds}/var/audit" |
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161 zfs create ${_zfsopts} ${_zfsnoauto} -o exec=off -o setuid=off "${_ds}/var/cache" |
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162 zfs create ${_zfsopts} ${_zfsnoauto} -o exec=off -o setuid=off -o primarycache=metadata -o compression=off "${_ds}/var/cache/pkg" |
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163 zfs create ${_zfsopts} ${_zfsnoauto} -o exec=off -o setuid=off -o compression=off "${_ds}/var/crash" |
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164 fi |
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165 if [ "$_fbsdupdate" = "yes" ]; then |
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166 if [ \( "${_tiny}" = "yes" \) -o \( "${_tiny}" = "extra" \) ]; then |
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167 zfs create ${_zfsopts} -o canmount=off -o exec=off -o setuid=off "${_ds}/var/db" |
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168 else |
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169 zfs create ${_zfsopts} ${_zfsnoauto} -o exec=off -o setuid=off "${_ds}/var/db" |
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170 fi |
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171 zfs create ${_zfsopts} ${_zfsnoauto} -o exec=off -o setuid=off -o primarycache=metadata -o compression=off "${_ds}/var/db/freebsd-update" |
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172 fi |
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173 zfs create ${_zfsopts} ${_zfsnoauto} ${_varempty_ro} -o exec=off -o setuid=off "${_ds}/var/empty" |
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174 zfs create ${_zfsopts} ${_zfsnoauto} -o exec=off -o setuid=off -o primarycache=metadata "${_ds}/var/log" |
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175 zfs create ${_zfsopts} ${_zfsnoauto} -o exec=off -o setuid=off -o atime=on "${_ds}/var/mail" |
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176 zfs create ${_zfsopts} ${_zfsnoauto} -o sync=disabled -o exec=off -o setuid=off -o compression=off -o primarycache=all "${_ds}/var/run" |
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177 zfs create ${_zfsopts} ${_zfsnoauto} -o sync=disabled -o setuid=off "${_ds}/var/tmp" |
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178 } |
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179 |
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180 |
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181 # |
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182 # "populate" -- populate the datasets with content from a FreeBSD base.txz |
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183 # |
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184 # command_populate mountpoint basetxz |
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185 # |
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186 command_populate() { |
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187 # MOUNTPOINT -- base.txz |
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188 local _mp _basetxz |
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189 |
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190 _mp="$1" |
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191 _basetxz="$2" |
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192 |
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193 if [ -z "${_mp}" ]; then |
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194 echo "ERROR: no mountpoint given" >&2 |
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195 return 2 |
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196 fi |
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197 if [ -z "${_basetxz}" ]; then |
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198 echo "ERROR: no base.txz given" >&2 |
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199 return 2 |
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200 fi |
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201 if [ ! -d "${_mp}" ]; then |
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202 echo "ERROR: mountpoint \`${_mp}' does not exist" >&2 |
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203 return 1 |
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204 fi |
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205 if [ ! -r "${_basetxz}" ]; then |
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206 echo "ERROR: file \`${_basetxz}' is not readable" >&2 |
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207 return 1 |
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208 fi |
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209 |
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210 # |
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211 # Handle /var/empty separately later: could be already there and |
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212 # mounted read-only. |
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213 # |
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214 tar -C "${_mp}" --exclude=./var/empty -xJp -f "${_basetxz}" || { echo "ERROR: tar encountered errors" >&2; return 1; } |
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215 if [ -d "${_mp}/var/empty" ]; then |
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216 # |
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217 # If /var/empty exists already try to extract with changing the |
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218 # flags (e.g. `schg'). But be ignore errors here. |
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219 # |
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220 tar -C "${_mp}" -xJp -f "${_basetxz}" ./var/empty || { echo "tar warnings for handling ./var/empty ignored because ./var/empty exists already" >&2; } |
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221 else |
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222 # Just extract /var/empty normally |
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223 tar -C "${_mp}" -xJp -f "${_basetxz}" ./var/empty || { echo "ERROR: tar encountered errors" >&2; return 1; } |
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224 fi |
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225 |
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226 find "${_mp}/boot" -type f -delete |
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227 } |
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228 |
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229 |
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230 # |
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231 # "mount" -- recursively mount a dataset including subordinate datasets |
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232 # |
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233 # command_mount dataset mountpoint |
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234 # |
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235 command_mount() { |
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236 local _dsname _mountpoint |
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237 local _name _mp _canmount _mounted |
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238 local _rootds_mountpoint _relative_mp _real_mp |
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239 local _dry_run _mount_outside _mount_natural |
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240 |
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241 _dry_run="" |
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242 _mount_outside="" |
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243 _mount_natural="" |
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244 while getopts "ONnu" _opt ; do |
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245 case ${_opt} in |
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246 O) |
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247 _mount_outside="yes" |
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248 ;; |
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249 N) |
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250 _mount_natural="yes" |
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251 ;; |
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252 n|u) |
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253 _dry_run="yes" |
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254 ;; |
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255 \?|:) |
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256 return 2; |
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257 ;; |
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258 esac |
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259 done |
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260 shift $((OPTIND-1)) |
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261 OPTIND=1 |
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262 |
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263 _dsname="${1-}" |
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264 _mountpoint="${2-}" |
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265 |
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266 if [ -z "${_dsname}" ]; then |
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267 echo "ERROR: no dataset given" >&2 |
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268 return 2 |
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269 fi |
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270 |
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271 _rootds_mountpoint="$(zfs list -H -o mountpoint -t filesystem "${_dsname}")" || \ |
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272 { echo "ERROR: root dataset does not exist" >&2; return 1; } |
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273 |
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274 if [ -z "${_mountpoint}" ]; then |
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275 if [ "${_mount_natural}" = "yes" ]; then |
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276 _mountpoint="${_rootds_mountpoint}" |
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277 else |
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278 echo "ERROR: no mountpoint given" >&2 |
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279 return 2 |
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280 fi |
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281 else |
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282 if [ "${_mount_natural}" = "yes" ]; then |
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283 echo "ERROR: Cannot have a custom mountpoint when \"-O\" is given" >&2 |
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284 return 2 |
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285 fi |
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286 fi |
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287 |
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288 # Eventually remove a trailing slash |
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289 _mountpoint="${_mountpoint%/}" |
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290 if [ -z "${_mountpoint}" ]; then |
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291 echo "ERROR: would mount over the root filesystem" >&2 |
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292 return 1 |
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293 fi |
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294 |
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295 zfs list -H -o name,mountpoint,canmount,mounted -s mountpoint -t filesystem -r "${_dsname}" \ |
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296 | { |
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297 while IFS=$'\t' read -r _name _mp _canmount _mounted ; do |
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298 # Skip filesystems that are already mounted |
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299 [ "${_mounted}" = "yes" ] && continue |
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300 # Skip filesystems that must not be mounted |
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301 [ "${_canmount}" = "off" ] && continue |
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302 case "${_mp}" in |
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303 "none"|"legacy") |
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304 # Do nothing for filesystem with unset or legacy mountpoints |
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305 ;; |
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306 "${_rootds_mountpoint}"|"${_rootds_mountpoint}/"*) |
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307 # |
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308 # Handle only mountpoints that have a mountpoint below |
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309 # the parent datasets mountpoint |
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310 # |
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311 |
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312 # Determine the mountpoint relative to the parent mountpoint |
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313 _relative_mp="${_mp#${_rootds_mountpoint}}" |
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314 # Eventually remove a trailing slash |
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315 _relative_mp="${_relative_mp%/}" |
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316 # The real effective full mountpoint |
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317 _real_mp="${_mountpoint}${_relative_mp}" |
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318 |
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319 # |
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320 # Consistency and sanity check: computed real mountpoint must |
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321 # be equal to the configured mountpoint when no custom mountpoint |
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322 # is given. |
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323 # |
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324 if [ "${_mount_natural}" = "yes" ]; then |
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325 if [ "${_real_mp}" != "${_mp}" ]; then |
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326 echo "ERROR: mountpoint mismatch" >&2 |
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327 return 1 |
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328 fi |
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329 fi |
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330 |
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331 if [ "${_dry_run}" = "yes" ]; then |
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332 echo "Would mount ${_name} on ${_real_mp}" |
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333 else |
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334 mkdir -p "${_real_mp}" 1> /dev/null 2> /dev/null || \ |
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335 { echo "ERROR: cannot create mountpoint ${_real_mp}" >&2; return 1; } |
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336 echo "Mounting ${_name} on ${_real_mp}" |
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337 mount -t zfs "${_name}" "${_real_mp}" || return 1 |
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338 fi |
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339 ;; |
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340 *) |
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341 if [ "${_mount_outside}" = "yes" ]; then |
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342 if [ "${_dry_run}" = "yes" ]; then |
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343 echo "Would mount ${_name} on configured ZFS dataset mountpoint ${_mp}" |
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344 else |
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345 echo "Mounting ${_name} on configured ZFS dataset mountpoint ${_mp}" |
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346 zfs mount "${_name}" || return 1 |
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347 fi |
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348 else |
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349 echo "Skipping ${_name} because its configured ZFS mountpoint is not relative to given root dataset" 2>&1 |
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350 fi |
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351 ;; |
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352 esac |
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353 done |
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354 |
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355 return 0 |
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356 } |
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357 } |
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358 |
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359 |
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360 # |
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361 # "umount" -- Recursively unmount ZFS datasets |
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362 # |
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363 # command_umount dataset |
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364 # |
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365 command_umount() { |
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366 local _dsname |
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367 local _name _mp _rest |
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368 local _rootds_mountpoint |
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369 |
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370 _dsname="${1-}" |
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371 [ -z "${_dsname}" ] && \ |
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372 { echo "ERROR: no dataset given" >&2; return 2; } |
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373 |
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374 # Just determine whether the given dataset name exists |
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375 _rootds_mountpoint="$(zfs list -H -o mountpoint -t filesystem "${_dsname}")" || { echo "ERROR: dataset not found" >&2; return 1; } |
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376 |
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377 mount -t zfs -p \ |
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378 | grep -E "^${_dsname}(/|\s)" \ |
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379 | sort -n -r \ |
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380 | { |
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381 while IFS=' '$'\t' read -r _name _mp _rest ; do |
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382 echo "Umounting ${_name} on ${_mp}" |
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383 umount "${_mp}" || return 1 |
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384 done |
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385 return 0 |
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386 } |
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387 } |
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|
388 |
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|
389 |
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390 # |
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391 # Global option handling |
|
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392 # |
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393 while getopts "Vh" _opt ; do |
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394 case ${_opt} in |
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|
395 V) |
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396 printf 'ftjail v%s (rv:%s)\n' "${VERSION}" '@@HGREVISION@@' |
|
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397 exit 0 |
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398 ;; |
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399 h) |
|
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|
400 echo "${USAGE}" |
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401 exit 0 |
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402 ;; |
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|
403 \?) |
|
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|
404 exit 2; |
|
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|
405 ;; |
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|
406 *) |
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407 echo "ERROR: option handling failed" >&2 |
|
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408 exit 2 |
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|
409 ;; |
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|
410 esac |
|
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|
411 done |
|
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parents:
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|
412 |
|
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parents:
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|
413 # |
|
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parents:
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|
414 # Reset the Shell's option handling system to prepare for handling |
|
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parents:
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415 # command-local options. |
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parents:
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|
416 # |
|
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|
417 shift $((OPTIND-1)) |
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parents:
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418 OPTIND=1 |
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419 |
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420 test $# -gt 0 || { echo "ERROR: no command given" >&2; exit 2; } |
|
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parents:
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|
421 |
|
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422 command="$1" |
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|
423 shift |
|
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parents:
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|
424 |
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|
425 case "${command}" in |
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235
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Some work on datasets-tmpl
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parents:
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426 datasets-tmpl) |
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Some work on datasets-tmpl
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parents:
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427 command_datasets_tmpl "$@" |
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Erste Basis für "ftjail": Management von Thin Jails
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parents:
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428 ;; |
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Erste Basis für "ftjail": Management von Thin Jails
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parents:
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429 populate) |
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f745d3a216a6
Erste Basis für "ftjail": Management von Thin Jails
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parents:
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430 command_populate "$@" |
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f745d3a216a6
Erste Basis für "ftjail": Management von Thin Jails
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parents:
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431 ;; |
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Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
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432 *) |
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Erste Basis für "ftjail": Management von Thin Jails
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parents:
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433 echo "ERROR: unknown command \`${command}'" >&2 |
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Erste Basis für "ftjail": Management von Thin Jails
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parents:
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434 exit 2 |
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f745d3a216a6
Erste Basis für "ftjail": Management von Thin Jails
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parents:
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435 ;; |
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f745d3a216a6
Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
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436 esac |
