Mercurial > hgrepos > FreeBSD > ports > sysutils > local-bsdtools

annotate sbin/ftjail @ 244:6e632f459818

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Rename "_dry_run" to the more proper "_opt_dry_run"
author Franz Glasner <fzglas.hg@dom66.de>
date Sat, 10 Sep 2022 17:38:48 +0200
parents d3fa59e2c5fe
children 61861d36758c
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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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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 mount-tmpl [ OPTIONS ] BASE-RO SKELETON-RW MOUNTPOINT
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42
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43 Canonically mount the RO base and the RW skeleton into MOUNTPOINT and
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44 MOUNTPOINT/skeleton
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45
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46 -n Do not really mount but show what would be mounted where
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47 -u Alias of -n
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48
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49 umount-tmpl BASE-RO SKELETON-RW
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50
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51 Unmount mounted datasets BASE-RO and SKELETON-RW
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52
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53 interlink-tmpl MOUNTPOINT
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54
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55 Create symbolic links between the RO base and the RW skeleton.
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56 Base and skeleton must be canonically mounted already.
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57
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58 populate MOUNTPOINT BASETXZ
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59
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60 Populate the directory in MOUNTPOINT with the base system in BASETXZ
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61
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62 ENVIRONMENT:
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64 All environment variables that affect "zfs" are effective also.
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65
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66 DESCRIPTION:
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67
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68 All commands with the exception of "populate" require ZFS as
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69 filesystem.
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70 '
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71
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72 # Reset to standard umask
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73 umask 0022
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74
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76 _get_dataset_for_mountpoint() {
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77 : 'Use `mount -t zfs -p` to determine the ZFS dataset for a given mountpoint.
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78
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79 '
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80 local _mountpoint
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81 local _ds _mount _rest
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82
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83 _mountpoint="$1"
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84
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85 mount -t zfs -p \
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86 | {
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87 while IFS=' '$'\t' read -r _ds _mount _rest ; do
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88 if [ "$_mount" = "$_mountpoint" ]; then
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89 echo "${_ds}"
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90 return 0
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91 fi
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92 done
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93 return 1
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94 }
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95 }
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96
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97
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98 #
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99 # PARENT-BASE NAME DRY-RUN
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100 #
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101 command_datasets_tmpl_base() {
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102 local _p_base _name _dry_run
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103
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104 local _ds_base
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105
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106 _p_base="${1-}"
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107 _name="${2-}"
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108 _dry_run="${3-}"
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109
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110 if [ -z "${_p_base}" ]; then
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111 echo "ERROR: no parent dataset for base given" >&2
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112 return 2
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113 fi
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114 if [ -z "${_name}" ]; then
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115 echo "ERROR: no name given" >&2
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116 return 2
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117 fi
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118
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119 if ! zfs list -H -o mountpoint -t filesystem "${_p_base}" >/dev/null 2>/dev/null; then
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120 echo "ERROR: parent dataset \`${_p_base}' does not exist" >&2
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121 return 1
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122 fi
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123 _ds_base="${_p_base}/${_name}"
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124 if zfs list -H -o mountpoint -t filesystem "${_ds_base}" >/dev/null 2>/dev/null; then
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125 echo "ERROR: dataset \`${_ds_base}' does already exist" >&2
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126 return 1
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127 fi
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128
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129
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130 [ "${_dry_run}" = "yes" ] && return 0
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131
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132 echo "Creating RO base datasets in:"
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133 printf "\\t%s\\n" "${_ds_base}"
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134
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135 zfs create -u -o canmount=noauto "${_ds_base}"
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136
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137 }
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138
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139
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140 #
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141 # SKELETON NAME DRY-RUN
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142 #
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143 command_datasets_tmpl_skel() {
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144 local _p_base _name _dry_run
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145
239
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146 local _ds_skel _child _child_zfsopts
236
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147
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148 _p_skel="${1-}"
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149 _name="${2-}"
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150 _dry_run="${3-}"
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151
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152 if [ -z "${_p_skel}" ]; then
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153 echo "ERROR: no parent dataset for skeleton given" >&2
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154 return 2
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155 fi
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156 if [ -z "${_name}" ]; then
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157 echo "ERROR: no name given" >&2
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158 return 2
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159 fi
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160
238
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161 if ! zfs list -H -o mountpoint -t filesystem "${_p_skel}" >/dev/null 2>/dev/null; then
236
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162 echo "ERROR: parent dataset \`${_p_skel}' does not exist" >&2
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163 return 1
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164 fi
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165 _ds_skel="${_p_skel}/${_name}"
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166 if zfs list -H -o mountpoint -t filesystem "${_ds_skel}" >/dev/null 2>/dev/null; then
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167 echo "ERROR: dataset \`${_ds_skel}' does already exist" >&2
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168 return 1
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169 fi
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170
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171
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172 [ "${_dry_run}" = "yes" ] && return 0
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173
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174 echo "Creating RW skeleton datasets in:"
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175 printf "\\t%s\\n" "${_ds_skel}"
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176
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177 zfs create -u -o canmount=noauto "${_ds_skel}"
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178 zfs create -u -o canmount=off "${_ds_skel}/usr"
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179 #
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180 # XXX FIXME: What about usr/ports/distfiles
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181 # We typically want to use binary packages.
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182 # And if we use ports they are not in usr/ports typically.
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183 #
239
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184 #zfs create -u -o canmount=off "${_ds_skel}/usr/ports"
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185 #
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186 # XXX FIXME: What about home
237
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187 #
239
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188 for _child in etc home root tmp usr/local var ; do
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189 case "${_child}" in
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190 "tmp"|"var/tmp")
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191 _child_zfsopts="-o sync=disabled -o setuid=off"
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192 ;;
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193 "home")
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194 _child_zfsopts="-o setuid=off"
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195 ;;
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196 "usr/ports/distfiles")
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197 _child_zfsopts="-o exec=off -o setuid=off -o compression=off -o primarycache=metadata"
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198 ;;
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199 "var/mail")
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200 _child_zfsopts="-o atime=on -o exec=off -o setuid=off"
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201 ;;
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202 *)
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203 _child_zfsopts=""
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204 ;;
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205 esac
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206 zfs create -u -o canmount=noauto ${_child_zfsopts} "${_ds_skel}/${_child}"
236
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207 done
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208 }
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209
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210
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211 #
235
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212 # "datasets-tmpl" -- create the ZFS dataset tree
233
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213 #
234
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214 # PARENT-BASE PARENT-SKELETON NAME
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215 #
235
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216 command_datasets_tmpl() {
233
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217 # parent ZFS dataset -- child ZFS dataset name
234
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218 local _p_base _p_skel _name
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219 local _zfsopts
235
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220 local _ds_base _ds_skel
234
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221
235
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222 _zfsopts="-u -o canmount=noauto"
233
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223
236
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224 _p_base="${1-}"
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225 _p_skel="${2-}"
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226 _name="${3-}"
234
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diff changeset
227
236
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228 # Check preconditions
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229 command_datasets_tmpl_base "${_p_base}" "${_name}" "yes" || return
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230 command_datasets_tmpl_skel "${_p_skel}" "${_name}" "yes" || return
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diff changeset
231
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232 # Really do it
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233 command_datasets_tmpl_base "${_p_base}" "${_name}" || return
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234 command_datasets_tmpl_skel "${_p_skel}" "${_name}" || return
235
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diff changeset
235 return 0
233
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236 }
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237
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238
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239 #
242
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diff changeset
240 # "populate-tmpl" -- populate the datasets with content from a FreeBSD base.txz
233
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241 #
242
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242 # command_populate_tmpl mountpoint basetxz
233
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243 #
242
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diff changeset
244 command_populate_tmpl() {
233
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245 # MOUNTPOINT -- base.txz
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246 local _mp _basetxz
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247
242
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diff changeset
248 local _dir
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249
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250 _mp="${1-}"
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diff changeset
251 _basetxz="${2-}"
233
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diff changeset
252
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
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diff changeset
253 if [ -z "${_mp}" ]; then
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parents:
diff changeset
254 echo "ERROR: no mountpoint given" >&2
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diff changeset
255 return 2
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
256 fi
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
257 if [ -z "${_basetxz}" ]; then
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parents:
diff changeset
258 echo "ERROR: no base.txz given" >&2
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parents:
diff changeset
259 return 2
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
260 fi
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
261 if [ ! -d "${_mp}" ]; then
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
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parents:
diff changeset
262 echo "ERROR: mountpoint \`${_mp}' does not exist" >&2
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parents:
diff changeset
263 return 1
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
264 fi
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
265 if [ ! -r "${_basetxz}" ]; then
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
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parents:
diff changeset
266 echo "ERROR: file \`${_basetxz}' is not readable" >&2
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parents:
diff changeset
267 return 1
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
268 fi
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Franz Glasner <fzglas.hg@dom66.de>
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269
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270 #
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271 # Handle /var/empty separately later: could be already there and
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272 # mounted read-only.
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273 #
242
59e933b81dcf First attemt to populate base and skeleton using the "skeleton" subdir and symliks from base to RW skeleton subdirs
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diff changeset
274 echo "Extracting RO base ..."
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diff changeset
275 tar -C "${_mp}" --exclude=./etc --exclude=./root --exclude=./tmp --exclude=./usr/local --exclude=./var --no-safe-writes -xJp -f "${_basetxz}" || return
59e933b81dcf First attemt to populate base and skeleton using the "skeleton" subdir and symliks from base to RW skeleton subdirs
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diff changeset
276 # "home" is not part of base
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diff changeset
277 for _dir in etc root tmp usr/local var ; do
59e933b81dcf First attemt to populate base and skeleton using the "skeleton" subdir and symliks from base to RW skeleton subdirs
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diff changeset
278 echo "Extracting RW skeleton: ${_dir} ..."
59e933b81dcf First attemt to populate base and skeleton using the "skeleton" subdir and symliks from base to RW skeleton subdirs
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diff changeset
279 tar -C "${_mp}/skeleton" --include="./${_dir}" --exclude=./root/.cshrc --exclude=./root/.profile -xJp -f "${_basetxz}" || return
59e933b81dcf First attemt to populate base and skeleton using the "skeleton" subdir and symliks from base to RW skeleton subdirs
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diff changeset
280 done
59e933b81dcf First attemt to populate base and skeleton using the "skeleton" subdir and symliks from base to RW skeleton subdirs
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diff changeset
281 # In the original archive they are archived as hardlinks: make symlinks here
59e933b81dcf First attemt to populate base and skeleton using the "skeleton" subdir and symliks from base to RW skeleton subdirs
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diff changeset
282 (cd "${_mp}/skeleton/root" && ln -s ../../.profile .profile) || return
59e933b81dcf First attemt to populate base and skeleton using the "skeleton" subdir and symliks from base to RW skeleton subdirs
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diff changeset
283 (cd "${_mp}/skeleton/root" && ln -s ../../.cshrc .cshrc) || return
233
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284
242
59e933b81dcf First attemt to populate base and skeleton using the "skeleton" subdir and symliks from base to RW skeleton subdirs
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diff changeset
285 find "${_mp}/boot" -type f -delete || true
233
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diff changeset
286 }
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
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parents:
diff changeset
287
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
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parents:
diff changeset
288
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diff changeset
289 #
241
acf16a85900f Mount and unmount template datasets
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diff changeset
290 # _do_mount dataset mountpoint dry-run mount-natural
233
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
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parents:
diff changeset
291 #
241
acf16a85900f Mount and unmount template datasets
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diff changeset
292 _do_mount() {
acf16a85900f Mount and unmount template datasets
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diff changeset
293 local _dsname _mountpoint _dry_run _mount_natural
233
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
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parents:
diff changeset
294 local _name _mp _canmount _mounted
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
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parents:
diff changeset
295 local _rootds_mountpoint _relative_mp _real_mp
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
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parents:
diff changeset
296
241
acf16a85900f Mount and unmount template datasets
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diff changeset
297 _dsname="${1}"
acf16a85900f Mount and unmount template datasets
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diff changeset
298 _mountpoint="${2}"
acf16a85900f Mount and unmount template datasets
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parents: 240
diff changeset
299 _dry_run="${3}"
acf16a85900f Mount and unmount template datasets
Franz Glasner <fzglas.hg@dom66.de>
parents: 240
diff changeset
300 _mount_natural="${4}"
233
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
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parents:
diff changeset
301
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
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parents:
diff changeset
302 if [ -z "${_dsname}" ]; then
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
303 echo "ERROR: no dataset given" >&2
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
304 return 2
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
305 fi
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
306
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
307 _rootds_mountpoint="$(zfs list -H -o mountpoint -t filesystem "${_dsname}")" || \
241
acf16a85900f Mount and unmount template datasets
Franz Glasner <fzglas.hg@dom66.de>
parents: 240
diff changeset
308 { echo "ERROR: root dataset \`${_dsname}' does not exist" >&2; return 1; }
233
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
309
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
310 if [ -z "${_mountpoint}" ]; then
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
311 if [ "${_mount_natural}" = "yes" ]; then
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
312 _mountpoint="${_rootds_mountpoint}"
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
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parents:
diff changeset
313 else
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
314 echo "ERROR: no mountpoint given" >&2
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
315 return 2
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
316 fi
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
317 else
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
318 if [ "${_mount_natural}" = "yes" ]; then
241
acf16a85900f Mount and unmount template datasets
Franz Glasner <fzglas.hg@dom66.de>
parents: 240
diff changeset
319 echo "ERROR: Cannot have a custom mountpoint when mount-natural is activated" >&2
233
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
320 return 2
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
321 fi
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
322 fi
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
323
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
324 # Eventually remove a trailing slash
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
325 _mountpoint="${_mountpoint%/}"
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
326 if [ -z "${_mountpoint}" ]; then
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
327 echo "ERROR: would mount over the root filesystem" >&2
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
328 return 1
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
329 fi
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
330
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
331 zfs list -H -o name,mountpoint,canmount,mounted -s mountpoint -t filesystem -r "${_dsname}" \
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
332 | {
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
333 while IFS=$'\t' read -r _name _mp _canmount _mounted ; do
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
334 # Skip filesystems that are already mounted
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
335 [ "${_mounted}" = "yes" ] && continue
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
336 # Skip filesystems that must not be mounted
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
337 [ "${_canmount}" = "off" ] && continue
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
338 case "${_mp}" in
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
339 "none"|"legacy")
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
340 # Do nothing for filesystem with unset or legacy mountpoints
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
341 ;;
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
342 "${_rootds_mountpoint}"|"${_rootds_mountpoint}/"*)
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
343 #
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
344 # Handle only mountpoints that have a mountpoint below
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
345 # the parent datasets mountpoint
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
346 #
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
347
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
348 # Determine the mountpoint relative to the parent mountpoint
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
349 _relative_mp="${_mp#${_rootds_mountpoint}}"
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
350 # Eventually remove a trailing slash
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
351 _relative_mp="${_relative_mp%/}"
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
352 # The real effective full mountpoint
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
353 _real_mp="${_mountpoint}${_relative_mp}"
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
354
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
355 #
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
356 # Consistency and sanity check: computed real mountpoint must
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
357 # be equal to the configured mountpoint when no custom mountpoint
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
358 # is given.
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
359 #
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
360 if [ "${_mount_natural}" = "yes" ]; then
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
361 if [ "${_real_mp}" != "${_mp}" ]; then
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
362 echo "ERROR: mountpoint mismatch" >&2
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
363 return 1
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
364 fi
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
365 fi
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
366
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
367 if [ "${_dry_run}" = "yes" ]; then
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
368 echo "Would mount ${_name} on ${_real_mp}"
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
369 else
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
370 mkdir -p "${_real_mp}" 1> /dev/null 2> /dev/null || \
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
371 { echo "ERROR: cannot create mountpoint ${_real_mp}" >&2; return 1; }
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372 echo "Mounting ${_name} on ${_real_mp}"
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373 mount -t zfs "${_name}" "${_real_mp}" || return 1
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374 fi
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375 ;;
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376 *)
241
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377 echo "Skipping ${_name} because its configured ZFS mountpoint is not relative to given root dataset" 2>&1
233
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378 ;;
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379 esac
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380 done
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381
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382 return 0
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383 }
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384 }
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385
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386
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387 #
241
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388 # "mount-tmpl" -- recursively mount a base and skeleton datasets including subordinate datasets
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389 #
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390 # command_mount_tmpl base-ro skeleton-rw mountpoint
233
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391 #
241
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392 command_mount_tmpl() {
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393 local _ds_base _ds_skel _mountpoint
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394
244
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395 local _opt_dry_run _opt
241
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396
244
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397 _opt_dry_run=""
241
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398
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399 while getopts "nu" _opt ; do
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400 case ${_opt} in
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401 n|u)
244
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402 _opt_dry_run="yes"
241
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403 ;;
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404 \?|:)
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405 return 2;
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406 ;;
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407 esac
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408 done
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409 shift $((OPTIND-1))
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410 OPTIND=1
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411
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412 _ds_base="${1-}"
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413 _ds_skel="${2-}"
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414 _mountpoint="${3-}"
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415
244
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416 _do_mount "${_ds_base}" "${_mountpoint}" "${_opt_dry_run}" "" || return
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417 if [ "${_opt_dry_run}" != "yes" ]; then
241
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418 if [ ! -d "${_mountpoint}/skeleton" ]; then
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419 mkdir "${_mountpoint}/skeleton" || return
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420 fi
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421 fi
244
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422 _do_mount "${_ds_skel}" "${_mountpoint}/skeleton" "${_opt_dry_run}" "" || return
241
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423
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424 return 0
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425 }
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426
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427
233
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428 #
241
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429 # _do_umount dataset
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430 #
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431 _do_umount() {
233
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432 local _dsname
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433 local _name _mp _rest
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434 local _rootds_mountpoint
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435
241
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436 _dsname="${1}"
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437 [ -z "${_dsname}" ] && { echo "ERROR: no dataset given" >&2; return 2; }
233
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438
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439 # Just determine whether the given dataset name exists
241
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440 _rootds_mountpoint="$(zfs list -H -o mountpoint -t filesystem "${_dsname}")" || \
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441 { echo "ERROR: dataset not found" >&2; return 1; }
233
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442
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443 mount -t zfs -p \
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444 | grep -E "^${_dsname}(/|\s)" \
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445 | sort -n -r \
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446 | {
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447 while IFS=' '$'\t' read -r _name _mp _rest ; do
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448 echo "Umounting ${_name} on ${_mp}"
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449 umount "${_mp}" || return 1
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450 done
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451 return 0
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452 }
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diff changeset
453 }
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diff changeset
454
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
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diff changeset
455
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diff changeset
456 #
241
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457 # "umount-tmpl" -- umount skeleton and base datasets
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diff changeset
458 #
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459 # command_umount_tmpl ds-base ds-skeleton
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diff changeset
460 #
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diff changeset
461 command_umount_tmpl() {
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462 local _ds_base _ds_skel
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463
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diff changeset
464 _ds_base="${1-}"
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diff changeset
465 _ds_skel="${2-}"
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diff changeset
466
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diff changeset
467 [ -z "${_ds_base}" ] && { echo "ERROR: no RO base dataset given" >&2; return 2; }
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diff changeset
468 [ -z "${_ds_skel}" ] && { echo "ERROR: no RW skeleton dataset given" >&2; return 2; }
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469
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470 _do_umount "${_ds_skel}" || return
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471 _do_umount "${_ds_base}" || return
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diff changeset
472
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473 return 0
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diff changeset
474 }
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diff changeset
475
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diff changeset
476
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diff changeset
477 #
242
59e933b81dcf First attemt to populate base and skeleton using the "skeleton" subdir and symliks from base to RW skeleton subdirs
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diff changeset
478 # "interlink-tmpl" -- create links from base to skeleton
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diff changeset
479 #
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diff changeset
480 # command_interlink_tmpl mountpint
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diff changeset
481 #
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diff changeset
482 command_interlink_tmpl() {
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diff changeset
483 local _mountpoint
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diff changeset
484
59e933b81dcf First attemt to populate base and skeleton using the "skeleton" subdir and symliks from base to RW skeleton subdirs
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diff changeset
485 local _dir _dirpart _basepart
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diff changeset
486
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diff changeset
487 _mountpoint="${1-}"
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diff changeset
488
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diff changeset
489 [ -z "${_mountpoint}" ] && { echo "ERROR: no mountpoint given" 2>&1; return 2; }
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diff changeset
490 [ -d "${_mountpoint}" ] || { echo "ERROR: mountpoint \`${_mountpoint}' does not exist" 2>&1; return 1; }
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diff changeset
491 [ -d "${_mountpoint}/skeleton" ] || { echo "WARNING: skeleton is not mounted at \`${_mountpoint}/skeleton'" 2>&1; }
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diff changeset
492
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diff changeset
493 for _dir in etc home root tmp usr/local var ; do
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diff changeset
494 case "${_dir}" in
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diff changeset
495 "usr/local")
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diff changeset
496 _dirpart="$(dirname "${_dir}")"
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diff changeset
497 _basepart="$(basename "${_dir}")"
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diff changeset
498 [ -d "${_mountpoint}/${_dirpart}" ] || mkdir "${_mountpoint}/${_dirpart}" || return
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diff changeset
499 ( cd "${_mountpoint}/${_dirpart}" && ln -s "../skeleton/${_dir}" "${_basepart}" ) || return
59e933b81dcf First attemt to populate base and skeleton using the "skeleton" subdir and symliks from base to RW skeleton subdirs
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500 ;;
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Franz Glasner <fzglas.hg@dom66.de>
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diff changeset
501 *)
59e933b81dcf First attemt to populate base and skeleton using the "skeleton" subdir and symliks from base to RW skeleton subdirs
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diff changeset
502 ( cd "${_mountpoint}" && ln -s "skeleton/${_dir}" "${_dir}" ) || return
59e933b81dcf First attemt to populate base and skeleton using the "skeleton" subdir and symliks from base to RW skeleton subdirs
Franz Glasner <fzglas.hg@dom66.de>
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503 ;;
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diff changeset
504 esac
59e933b81dcf First attemt to populate base and skeleton using the "skeleton" subdir and symliks from base to RW skeleton subdirs
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parents: 241
diff changeset
505 done
59e933b81dcf First attemt to populate base and skeleton using the "skeleton" subdir and symliks from base to RW skeleton subdirs
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parents: 241
diff changeset
506 return 0
59e933b81dcf First attemt to populate base and skeleton using the "skeleton" subdir and symliks from base to RW skeleton subdirs
Franz Glasner <fzglas.hg@dom66.de>
parents: 241
diff changeset
507 }
59e933b81dcf First attemt to populate base and skeleton using the "skeleton" subdir and symliks from base to RW skeleton subdirs
Franz Glasner <fzglas.hg@dom66.de>
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diff changeset
508
59e933b81dcf First attemt to populate base and skeleton using the "skeleton" subdir and symliks from base to RW skeleton subdirs
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diff changeset
509
59e933b81dcf First attemt to populate base and skeleton using the "skeleton" subdir and symliks from base to RW skeleton subdirs
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parents: 241
diff changeset
510 #
233
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
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parents:
diff changeset
511 # Global option handling
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
512 #
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
513 while getopts "Vh" _opt ; do
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Franz Glasner <fzglas.hg@dom66.de>
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514 case ${_opt} in
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
515 V)
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Franz Glasner <fzglas.hg@dom66.de>
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516 printf 'ftjail v%s (rv:%s)\n' "${VERSION}" '@@HGREVISION@@'
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
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diff changeset
517 exit 0
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
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parents:
diff changeset
518 ;;
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
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parents:
diff changeset
519 h)
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
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parents:
diff changeset
520 echo "${USAGE}"
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
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parents:
diff changeset
521 exit 0
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
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parents:
diff changeset
522 ;;
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
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parents:
diff changeset
523 \?)
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
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parents:
diff changeset
524 exit 2;
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
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parents:
diff changeset
525 ;;
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
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parents:
diff changeset
526 *)
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
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parents:
diff changeset
527 echo "ERROR: option handling failed" >&2
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
528 exit 2
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
529 ;;
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
530 esac
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
531 done
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
532
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
533 #
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
534 # Reset the Shell's option handling system to prepare for handling
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
535 # command-local options.
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
536 #
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
537 shift $((OPTIND-1))
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
538 OPTIND=1
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
539
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
540 test $# -gt 0 || { echo "ERROR: no command given" >&2; exit 2; }
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
541
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
542 command="$1"
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
543 shift
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
544
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
545 case "${command}" in
235
85aea8ca1ab8 Some work on datasets-tmpl
Franz Glasner <fzglas.hg@dom66.de>
parents: 234
diff changeset
546 datasets-tmpl)
85aea8ca1ab8 Some work on datasets-tmpl
Franz Glasner <fzglas.hg@dom66.de>
parents: 234
diff changeset
547 command_datasets_tmpl "$@"
233
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
548 ;;
241
acf16a85900f Mount and unmount template datasets
Franz Glasner <fzglas.hg@dom66.de>
parents: 240
diff changeset
549 mount-tmpl)
acf16a85900f Mount and unmount template datasets
Franz Glasner <fzglas.hg@dom66.de>
parents: 240
diff changeset
550 command_mount_tmpl "$@"
acf16a85900f Mount and unmount template datasets
Franz Glasner <fzglas.hg@dom66.de>
parents: 240
diff changeset
551 ;;
acf16a85900f Mount and unmount template datasets
Franz Glasner <fzglas.hg@dom66.de>
parents: 240
diff changeset
552 umount-tmpl|unmount-tmpl)
acf16a85900f Mount and unmount template datasets
Franz Glasner <fzglas.hg@dom66.de>
parents: 240
diff changeset
553 command_umount_tmpl "$@"
acf16a85900f Mount and unmount template datasets
Franz Glasner <fzglas.hg@dom66.de>
parents: 240
diff changeset
554 ;;
242
59e933b81dcf First attemt to populate base and skeleton using the "skeleton" subdir and symliks from base to RW skeleton subdirs
Franz Glasner <fzglas.hg@dom66.de>
parents: 241
diff changeset
555 interlink-tmpl)
59e933b81dcf First attemt to populate base and skeleton using the "skeleton" subdir and symliks from base to RW skeleton subdirs
Franz Glasner <fzglas.hg@dom66.de>
parents: 241
diff changeset
556 command_interlink_tmpl "$@"
59e933b81dcf First attemt to populate base and skeleton using the "skeleton" subdir and symliks from base to RW skeleton subdirs
Franz Glasner <fzglas.hg@dom66.de>
parents: 241
diff changeset
557 ;;
59e933b81dcf First attemt to populate base and skeleton using the "skeleton" subdir and symliks from base to RW skeleton subdirs
Franz Glasner <fzglas.hg@dom66.de>
parents: 241
diff changeset
558 populate-tmpl)
59e933b81dcf First attemt to populate base and skeleton using the "skeleton" subdir and symliks from base to RW skeleton subdirs
Franz Glasner <fzglas.hg@dom66.de>
parents: 241
diff changeset
559 command_populate_tmpl "$@"
233
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
560 ;;
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
561 *)
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
562 echo "ERROR: unknown command \`${command}'" >&2
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
563 exit 2
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
564 ;;
f745d3a216a6 Erste Basis für "ftjail": Management von Thin Jails
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
565 esac