root / snf-image-helper / common.sh @ 0d67af87
History | View | Annotate | Download (8 kB)
1 |
# Copyright (C) 2011 GRNET S.A. |
---|---|
2 |
# Copyright (C) 2007, 2008, 2009 Google Inc. |
3 |
# |
4 |
# This program is free software; you can redistribute it and/or modify |
5 |
# it under the terms of the GNU General Public License as published by |
6 |
# the Free Software Foundation; either version 2 of the License, or |
7 |
# (at your option) any later version. |
8 |
# |
9 |
# This program is distributed in the hope that it will be useful, but |
10 |
# WITHOUT ANY WARRANTY; without even the implied warranty of |
11 |
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
12 |
# General Public License for more details. |
13 |
# |
14 |
# You should have received a copy of the GNU General Public License |
15 |
# along with this program; if not, write to the Free Software |
16 |
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
17 |
# 02110-1301, USA. |
18 |
|
19 |
RESULT=/dev/ttyS1 |
20 |
FLOPPY_DEV=/dev/fd0 |
21 |
PROGNAME=$(basename $0) |
22 |
|
23 |
PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin |
24 |
|
25 |
# Programs |
26 |
XMLSTARLET=xmlstarlet |
27 |
TUNE2FS=tune2fs |
28 |
RESIZE2FS=resize2fs |
29 |
PARTED=parted |
30 |
SFDISK=sfdisk |
31 |
REGLOOKUP=reglookup |
32 |
CHNTPW=chntpw |
33 |
|
34 |
CLEANUP=( ) |
35 |
|
36 |
add_cleanup() { |
37 |
local cmd="" |
38 |
for arg; do cmd+=$(printf "%q " "$arg"); done |
39 |
CLEANUP+=("$cmd") |
40 |
} |
41 |
|
42 |
log_error() { |
43 |
echo "ERROR: $@" | tee $RESULT >&2 |
44 |
exit 1 |
45 |
} |
46 |
|
47 |
warn() { |
48 |
echo "Warning: $@" >&2 |
49 |
} |
50 |
|
51 |
get_base_distro() { |
52 |
local root_dir=$1 |
53 |
|
54 |
if [ -e "$root_dir/etc/debian_version" ]; then |
55 |
echo "debian" |
56 |
elif [ -e "$root_dir/etc/redhat-release" ]; then |
57 |
echo "redhat" |
58 |
elif [ -e "$root_dir/etc/slackware-version" ]; then |
59 |
echo "slackware" |
60 |
elif [ -e "$root_dir/etc/SuSE-release" ]; then |
61 |
echo "suse" |
62 |
elif [ -e "$root_dir/etc/gentoo-release" ]; then |
63 |
echo "gentoo" |
64 |
else |
65 |
warn "Unknown base distro." |
66 |
fi |
67 |
} |
68 |
|
69 |
get_distro() { |
70 |
local root_dir=$1 |
71 |
|
72 |
if [ -e "$root_dir/etc/debian_version" ]; then |
73 |
distro="debian" |
74 |
if [ -e ${root_dir}/etc/lsb-release ]; then |
75 |
ID=$(grep ^DISTRIB_ID= ${root_dir}/etc/lsb-release | cut -d= -f2) |
76 |
if [ "x$ID" = "xUbuntu" ]; then |
77 |
distro="ubuntu" |
78 |
fi |
79 |
fi |
80 |
echo "$distro" |
81 |
elif [ -e "$root_dir/etc/fedora-release" ]; then |
82 |
echo "fedora" |
83 |
elif [ -e "$root_dir/etc/centos-release" ]; then |
84 |
echo "centos" |
85 |
elif [ -e "$root_dir/etc/redhat-release" ]; then |
86 |
echo "redhat" |
87 |
elif [ -e "$root_dir/etc/slackware-version" ]; then |
88 |
echo "slackware" |
89 |
elif [ -e "$root_dir/etc/SuSE-release" ]; then |
90 |
echo "suse" |
91 |
elif [ -e "$root_dir/etc/gentoo-release" ]; then |
92 |
echo "gentoo" |
93 |
else |
94 |
warn "Unknown distro." |
95 |
fi |
96 |
} |
97 |
|
98 |
get_last_partition_id() { |
99 |
local dev="$1" |
100 |
if ! output="$("$PARTED" -s -m "$dev" print)"; then |
101 |
log_error "Unable to read partition table for device \`${dev}'" |
102 |
fi |
103 |
|
104 |
last_line=$(tail -1 <<< "$output") |
105 |
|
106 |
echo $(cut -d: -f1 <<< "$last_line") |
107 |
} |
108 |
|
109 |
get_partition_table() { |
110 |
local dev="$1" |
111 |
if ! output="$("$PARTED" -s -m "$dev" unit s print)"; then |
112 |
log_error "Unable to read partition table for device \`${dev}'" |
113 |
fi |
114 |
|
115 |
echo "$output" |
116 |
} |
117 |
|
118 |
get_partition_table_type() { |
119 |
local ptable="$1" |
120 |
|
121 |
local dev="$(sed -n 2p <<< "$ptable")" |
122 |
declare -a field |
123 |
IFS=':' read -ra field <<< "$dev" |
124 |
|
125 |
echo "${field[5]}" |
126 |
} |
127 |
|
128 |
get_partition_count() { |
129 |
local ptable="$1" |
130 |
|
131 |
expr $(echo "$ptable" | wc -l) - 2 |
132 |
} |
133 |
|
134 |
get_partition_by_id() { |
135 |
local ptable="$1" |
136 |
local id="$2" |
137 |
|
138 |
grep "^$id:" <<< "$ptable" |
139 |
} |
140 |
|
141 |
get_last_partition() { |
142 |
local ptable="$1" |
143 |
|
144 |
echo "$ptable" | tail -1 |
145 |
} |
146 |
|
147 |
is_extended_partition() { |
148 |
local dev="$1" |
149 |
local part_num="$2" |
150 |
|
151 |
id=$($SFDISK --print-id "$dev" "$part_num") |
152 |
if [ "$id" = "5" ]; then |
153 |
echo "yes" |
154 |
else |
155 |
echo "no" |
156 |
fi |
157 |
} |
158 |
|
159 |
get_extended_partition() { |
160 |
local ptable="$1" |
161 |
local dev="$(echo "$ptable" | sed -n 2p | cut -d':' -f1)" |
162 |
|
163 |
tail -n +3 <<< "$ptable" | while read line; do |
164 |
part_num=$(cut -d':' -f1 <<< "$line") |
165 |
if [ $(is_extended_partition "$dev" "$part_num") == "yes" ]; then |
166 |
echo "$line" |
167 |
return 0 |
168 |
fi |
169 |
done |
170 |
echo "" |
171 |
} |
172 |
|
173 |
get_logical_partitions() { |
174 |
local ptable="$1" |
175 |
|
176 |
tail -n +3 <<< "$ptable" | while read line; do |
177 |
part_num=$(cut -d':' -f1 <<< "$line") |
178 |
if [ $part_num -ge 5 ]; then |
179 |
echo "$line" |
180 |
fi |
181 |
done |
182 |
|
183 |
return 0 |
184 |
} |
185 |
|
186 |
get_last_primary_partition() { |
187 |
local ptable="$1" |
188 |
local dev=$(echo "ptable" | sed -n 2p | cut -d':' -f1) |
189 |
|
190 |
for i in 4 3 2 1; do |
191 |
if output=$(grep "^$i:" <<< "$ptable"); then |
192 |
echo "$output" |
193 |
return 0 |
194 |
fi |
195 |
done |
196 |
echo "" |
197 |
} |
198 |
|
199 |
create_partition() { |
200 |
local device="$1" |
201 |
local part="$2" |
202 |
local ptype="$3" |
203 |
|
204 |
declare -a fields |
205 |
IFS=":;" read -ra fields <<< "$part" |
206 |
local id="${fields[0]}" |
207 |
local start="${fields[1]}" |
208 |
local end="${fields[2]}" |
209 |
local size="${fields[3]}" |
210 |
local fs="${fields[4]}" |
211 |
local name="${fields[5]}" |
212 |
local flags="${fields[6]//,/ }" |
213 |
|
214 |
$PARTED -s -m -- $device mkpart "$ptype" $fs "$start" "$end" |
215 |
for flag in $flags; do |
216 |
$PARTED -s -m $device set "$id" "$flag" on |
217 |
done |
218 |
} |
219 |
|
220 |
enlarge_partition() { |
221 |
local device="$1" |
222 |
local part="$2" |
223 |
local ptype="$3" |
224 |
local new_end="$4" |
225 |
|
226 |
if [ -z "$new_end" ]; then |
227 |
new_end=$(cut -d: -f 3 <<< "$(get_last_free_sector "$device")") |
228 |
fi |
229 |
|
230 |
declare -a fields |
231 |
IFS=":;" read -ra fields <<< "$part" |
232 |
fields[2]="$new_end" |
233 |
|
234 |
local new_part="" |
235 |
for ((i = 0; i < ${#fields[*]}; i = i + 1)); do |
236 |
new_part="$new_part":"${fields[$i]}" |
237 |
done |
238 |
new_part=${new_part:1} |
239 |
|
240 |
# If this is an extended partition, removing it will also remove the |
241 |
# logical partitions it contains. We need to save them for later. |
242 |
if [ "$ptype" = "extended" ]; then |
243 |
local table="$(get_partition_table "$device")" |
244 |
local logical="$(get_logical_partitions "$table")" |
245 |
fi |
246 |
|
247 |
id=${fields[0]} |
248 |
$PARTED -s -m "$device" rm "$id" |
249 |
create_partition "$device" "$new_part" "$ptype" |
250 |
|
251 |
if [ "$ptype" = "extended" ]; then |
252 |
# Recreate logical partitions |
253 |
echo "$logical" | while read logical_part; do |
254 |
create_partition "$device" "$logical_part" "logical" |
255 |
done |
256 |
fi |
257 |
} |
258 |
|
259 |
get_last_free_sector() { |
260 |
local dev="$1" |
261 |
local unit="$2" |
262 |
|
263 |
if [ -n "$unit" ]; then |
264 |
unit="unit $unit" |
265 |
fi |
266 |
|
267 |
local last_line="$("$PARTED" -s -m "$dev" "$unit" print free | tail -1)" |
268 |
local ptype="$(cut -d: -f 5 <<< "$last_line")" |
269 |
|
270 |
if [ "$ptype" = "free;" ]; then |
271 |
echo "$last_line" |
272 |
fi |
273 |
} |
274 |
|
275 |
cleanup() { |
276 |
# if something fails here, it shouldn't call cleanup again... |
277 |
trap - EXIT |
278 |
|
279 |
if [ ${#CLEANUP[*]} -gt 0 ]; then |
280 |
LAST_ELEMENT=$((${#CLEANUP[*]}-1)) |
281 |
REVERSE_INDEXES=$(seq ${LAST_ELEMENT} -1 0) |
282 |
for i in $REVERSE_INDEXES; do |
283 |
# If something fails here, it's better to retry it for a few times |
284 |
# before we give up with an error. This is needed for kpartx when |
285 |
# dealing with ntfs partitions mounted through fuse. umount is not |
286 |
# synchronous and may return while the partition is still busy. A |
287 |
# premature attempt to delete partition mappings through kpartx on |
288 |
# a device that hosts previously mounted ntfs partition may fail |
289 |
# with a `device-mapper: remove ioctl failed: Device or resource |
290 |
# busy' error. A sensible workaround for this is to wait for a |
291 |
# while and then try again. |
292 |
local cmd=${CLEANUP[$i]} |
293 |
$cmd || for interval in 0.25 0.5 1 2 4; do |
294 |
echo "Command $cmd failed!" |
295 |
echo "I'll wait for $interval secs and will retry..." |
296 |
sleep $interval |
297 |
$cmd && break |
298 |
done |
299 |
if [ "$?" != "0" ]; then |
300 |
echo "Giving Up..." |
301 |
exit 1; |
302 |
fi |
303 |
done |
304 |
fi |
305 |
} |
306 |
|
307 |
check_if_excluded() { |
308 |
|
309 |
local exclude=SNF_IMAGE_PROPERTY_EXCLUDE_TASK_${PROGNAME:2} |
310 |
if [ -n "${!exclude}" ]; then |
311 |
warn "Task $PROGNAME was excluded and will not run." |
312 |
exit 0 |
313 |
fi |
314 |
|
315 |
return 0 |
316 |
} |
317 |
|
318 |
trap cleanup EXIT |
319 |
set -o pipefail |
320 |
|
321 |
# vim: set sta sts=4 shiftwidth=4 sw=4 et ai : |