root / snf-image-helper / common.sh @ b126203e
History | View | Annotate | Download (7.4 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_partition_table() { |
99 |
local dev="$1" |
100 |
if ! output="$("$PARTED" -s -m "$dev" print)"; then |
101 |
log_error "Unable to read partition table for device \`${dev}'" |
102 |
fi |
103 |
|
104 |
echo "$output" |
105 |
} |
106 |
|
107 |
get_partition_table_type() { |
108 |
local ptable="$1" |
109 |
|
110 |
local dev="$(sed -n 2p <<< "$ptable")" |
111 |
declare -a field |
112 |
IFS=':' read -ra field <<< "$dev" |
113 |
|
114 |
echo "${field[5]}" |
115 |
} |
116 |
|
117 |
get_partition_count() { |
118 |
local ptable="$1" |
119 |
|
120 |
expr $(echo "$ptable" | wc -l) - 2 |
121 |
} |
122 |
|
123 |
get_last_partition() { |
124 |
local ptable="$1" |
125 |
|
126 |
echo "$ptable" | tail -1 |
127 |
} |
128 |
|
129 |
is_extended_partition() { |
130 |
local dev="$1" |
131 |
local part_num="$2" |
132 |
|
133 |
id=$($SFDISK --print-id "$dev" "$part_num") |
134 |
if [ "$id" = "5" ]; then |
135 |
echo "yes" |
136 |
else |
137 |
echo "no" |
138 |
fi |
139 |
} |
140 |
|
141 |
get_extended_partition() { |
142 |
local ptable="$1" |
143 |
local dev="$(echo "$ptable" | sed -n 2p | cut -d':' -f1)" |
144 |
|
145 |
tail -n +3 <<< "$ptable" | while read line; do |
146 |
part_num=$(cut -d':' -f1 <<< "$line") |
147 |
if [ $(is_extended_partition "$dev" "$part_num") == "yes" ]; then |
148 |
echo "$line" |
149 |
return 0 |
150 |
fi |
151 |
done |
152 |
echo "" |
153 |
} |
154 |
|
155 |
get_logical_partitions() { |
156 |
local ptable="$1" |
157 |
|
158 |
tail -n +3 <<< "$ptable" | while read line; do |
159 |
part_num=$(cut -d':' -f1 <<< "$line") |
160 |
if [ $part_num -ge 5 ]; then |
161 |
echo "$line" |
162 |
fi |
163 |
done |
164 |
|
165 |
return 0 |
166 |
} |
167 |
|
168 |
get_last_primary_partition() { |
169 |
local ptable="$1" |
170 |
local dev=$(echo "ptable" | sed -n 2p | cut -d':' -f1) |
171 |
|
172 |
for i in 4 3 2 1; do |
173 |
if output=$(grep "^$i:" <<< "$ptable"); then |
174 |
echo "$output" |
175 |
return 0 |
176 |
fi |
177 |
done |
178 |
echo "" |
179 |
} |
180 |
|
181 |
create_partition() { |
182 |
local device=$1 |
183 |
local part=$2 |
184 |
local ptype=$3 |
185 |
|
186 |
declare -a fields |
187 |
IFS=":;" read -ra fields <<< "$part" |
188 |
local id=${fields[0]} |
189 |
local start=${fields[1]} |
190 |
local end=${fields[2]} |
191 |
local size=${fields[3]} |
192 |
local fs=${fields[4]} |
193 |
local name=${fields[5]} |
194 |
local flags=${fields[6]//,/ } |
195 |
|
196 |
$PARTED -s -m $device mkpart "$ptype" $fs "$start" "$end" |
197 |
for flag in $flags; do |
198 |
$PARTED -s -m $device set "$id" "$flag" on |
199 |
done |
200 |
} |
201 |
|
202 |
enlarge_partition() { |
203 |
local device=$1 |
204 |
local part=$2 |
205 |
local ptype=$3 |
206 |
|
207 |
local new_end=$(get_last_free_sector "$device") |
208 |
declare -a fields |
209 |
IFS=":;" read -ra fields <<< "$part" |
210 |
fields[2]="$new_end" |
211 |
|
212 |
local new_part="" |
213 |
for ((i = 0; i < ${#fields[*]}; i = i + 1)); do |
214 |
new_part="$new_part":"${fields[$i]}" |
215 |
done |
216 |
new_part=${new_part:1} |
217 |
|
218 |
# If this is an extended partition, removing it will also remove the |
219 |
# logical partitions it contains. We need to save them for later. |
220 |
if [ "$ptype" = "extended" ]; then |
221 |
local table="$(get_partition_table "$device")" |
222 |
local logical="$(get_logical_partitions "$table")" |
223 |
fi |
224 |
|
225 |
id=${fields[0]} |
226 |
$PARTED -s -m "$device" rm "$id" |
227 |
create_partition "$device" "$new_part" "$ptype" |
228 |
|
229 |
if [ "$ptype" = "extended" ]; then |
230 |
# Recreate logical partitions |
231 |
echo "$logical" | while read logical_part; do |
232 |
create_partition "$device" "$logical_part" "logical" |
233 |
done |
234 |
fi |
235 |
} |
236 |
|
237 |
get_last_free_sector() { |
238 |
local dev="$1" |
239 |
local last_line="$("$PARTED" -s -m "$dev" print free | tail -1)" |
240 |
local ptype="$(echo "$last_line" | cut -d: -f 5)" |
241 |
|
242 |
if [ "$ptype" = "free;" ]; then |
243 |
echo "$last_line" | cut -d: -f 3 |
244 |
fi |
245 |
} |
246 |
|
247 |
cleanup() { |
248 |
# if something fails here, it shouldn't call cleanup again... |
249 |
trap - EXIT |
250 |
|
251 |
if [ ${#CLEANUP[*]} -gt 0 ]; then |
252 |
LAST_ELEMENT=$((${#CLEANUP[*]}-1)) |
253 |
REVERSE_INDEXES=$(seq ${LAST_ELEMENT} -1 0) |
254 |
for i in $REVERSE_INDEXES; do |
255 |
# If something fails here, it's better to retry it for a few times |
256 |
# before we give up with an error. This is needed for kpartx when |
257 |
# dealing with ntfs partitions mounted through fuse. umount is not |
258 |
# synchronous and may return while the partition is still busy. A |
259 |
# premature attempt to delete partition mappings through kpartx on a |
260 |
# device that hosts previously mounted ntfs partition may fail with |
261 |
# a `device-mapper: remove ioctl failed: Device or resource busy' |
262 |
# error. A sensible workaround for this is to wait for a while and |
263 |
# then try again. |
264 |
local cmd=${CLEANUP[$i]} |
265 |
$cmd || for interval in 0.25 0.5 1 2 4; do |
266 |
echo "Command $cmd failed!" |
267 |
echo "I'll wait for $interval secs and will retry..." |
268 |
sleep $interval |
269 |
$cmd && break |
270 |
done |
271 |
if [ "$?" != "0" ]; then |
272 |
echo "Giving Up..." |
273 |
exit 1; |
274 |
fi |
275 |
done |
276 |
fi |
277 |
} |
278 |
|
279 |
check_if_excluded() { |
280 |
|
281 |
local exclude=SNF_IMAGE_PROPERTY_EXCLUDE_TASK_${PROGNAME:2} |
282 |
if [ -n "${!exclude}" ]; then |
283 |
warn "Task $PROGNAME was excluded and will not run." |
284 |
exit 0 |
285 |
fi |
286 |
|
287 |
return 0 |
288 |
} |
289 |
|
290 |
trap cleanup EXIT |
291 |
set -o pipefail |
292 |
# vim: set sta sts=4 shiftwidth=4 sw=4 et ai : |