1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
|
#!/bin/bash
#
# lsinitcpio - dump the contents of an initramfs image
#
shopt -s extglob
_list='--list'
_optcolor=1 _optverbose=0
_f_functions=functions
usage() {
cat<<USAGE
lsinitcpio %VERSION%
usage: ${0##*/} [action] [options] <initramfs>
Actions:
-a, --analyze analyze contents of image
-c, --config show configuration file image was built with
-l, --list list contents of the image (default)
-x, --extract extract image to disk
Options:
-h, --help display this help
-n, --nocolor disable colorized output
-v, --verbose more verbose output
USAGE
}
decomp() {
${_compress:-cat} ${_compress:+-cd} "$@"
}
. "$_f_functions"
# override the die method from functions
die() {
error "$@"
exit 1
}
size_to_human() {
awk -v size="$1" '
BEGIN {
suffix[1] = "B"
suffix[2] = "KiB"
suffix[3] = "MiB"
suffix[4] = "GiB"
suffix[5] = "TiB"
count = 1
while (size > 1024) {
size /= 1024
count++
}
sizestr = sprintf("%.2f", size)
sub(/\.?0+$/, "", sizestr)
printf("%s %s", sizestr, suffix[count])
}'
}
analyze_image() {
local -a binaries explicitmod modules foundhooks hooks
local kernver ratio columns=$(tput cols) image=$1
workdir=$(mktemp -d --tmpdir="$TMPDIR" lsinitcpio.XXXXXX)
trap 'rm -rf "$workdir"' EXIT
# fallback in case tput failed us
columns=${columns:-80}
zsize=$(stat -c %s "$_image")
# calculate compression ratio
TIMEFORMAT=%R decomptime=$({ time decomp "$_image" >/dev/null; } 2>&1 )
if [[ $_compress ]]; then
fullsize=$(decomp "$_image" | bsdtar xOf - | wc -c)
ratio=.$(( zsize * 1000 / fullsize % 1000 ))
fi
# decompress the image since we need to read from it multiple times. we
# have to pass this through decomp() since the image might be lzop which
# bsdtar can't read.
decomp "$_image" | bsdtar -C "$workdir" -xf -
# collect stats
kernver=("$workdir"/usr/lib/modules/*/)
kernver=${kernver%/}
kernver=${kernver##*/}
modules=("$workdir/usr/lib/modules/$kernver"/kernel/*.ko*)
if [[ -f ${modules[0]} ]]; then
modules=("${modules[@]##*/}")
modules=("${modules[@]%.ko*}")
else
unset modules
fi
foundhooks=("$workdir"/hooks/*)
[[ -f ${foundhooks[0]} ]] && foundhooks=("${foundhooks[@]##*/}") || unset foundhooks
mapfile -t binaries < <(find "$workdir/usr/bin" -type f -printf %f\\n)
read -r version < "$workdir/VERSION"
# source and read config
. "$workdir/config"
explicitmod=($MODULES)
# print results
imagename=$_image
[[ -L $_image ]] && imagename+=" -> $(readlink -e "$_image")"
msg 'Image: %s %s' "$imagename"
[[ $version ]] && msg 'Created with mkinitcpio %s' "$version"
msg 'Kernel: %s' "${kernver:-unknown}"
msg 'Size: %s' "$(size_to_human "$zsize")"
if [[ $_compress ]]; then
msg 'Compressed with: %s' "$_compress"
msg2 'Uncompressed size: %s (%s ratio)' "$(size_to_human "$fullsize")" "$ratio"
fi
msg2 'Estimated extraction time: %ss' "$decomptime"
printf '\n'
if (( ${#modules[*]} )); then
msg 'Included modules:'
for mod in "${modules[@]}"; do
printf ' %s' "$mod"
in_array "${mod//_/-}" "${explicitmod[@]//_/-}" && printf ' [explicit]'
printf '\n'
done | sort | column -c$columns
printf '\n'
fi
msg 'Included binaries:'
printf ' %s\n' "${binaries[@]}" | sort | column -c$columns
printf '\n'
if [[ $EARLYHOOKS ]]; then
msg 'Early hook run order:'
printf ' %s\n' $EARLYHOOKS
printf '\n'
fi
if [[ $HOOKS ]]; then
msg 'Hook run order:'
printf ' %s\n' $HOOKS
printf '\n'
fi
if [[ $LATEHOOKS ]]; then
msg 'Late hook run order:'
printf ' %s\n' $LATEHOOKS
printf '\n'
fi
if [[ $CLEANUPHOOKS ]]; then
msg 'Cleanup hook run order:'
printf ' %s\n' $CLEANUPHOOKS
printf '\n'
fi
}
_opt_short='achlnvx'
_opt_long=('analyze' 'help' 'list' 'nocolor' 'showconfig' 'verbose' 'extract')
if ! parseopts "$_opt_short" "${_opt_long[@]}" -- "$@"; then
exit 1
fi
set -- "${OPTRET[@]}"
unset _opt_short _opt_long OPTRET
while :; do
case $1 in
-a|--analyze)
_optanalyze=1 ;;
-c|--config)
_optshowconfig=1 ;;
-h|--help)
usage
exit 0 ;;
-l|--list)
_optlistcontents=1 ;;
-n|--nocolor)
_optcolor=0 ;;
-v|--verbose)
_optverbose='--verbose' ;;
-x|--extract)
unset _list ;;
--)
shift
break 2 ;;
esac
shift
done
_image=$1
if [[ -t 1 ]] && (( _optcolor )); then
# prefer terminal safe colored and bold text when tput is supported
if tput setaf 0 &>/dev/null; then
_color_none="$(tput sgr0)"
_color_bold="$(tput bold)"
_color_blue="$_color_bold$(tput setaf 4)"
_color_green="$_color_bold$(tput setaf 2)"
_color_red="$_color_bold$(tput setaf 1)"
_color_yellow="$_color_bold$(tput setaf 3)"
else
_color_none="\e[1;0m"
_color_bold="\e[1;1m"
_color_blue="$_color_bold\e[1;34m"
_color_green="$_color_bold\e[1;32m"
_color_red="$_color_bold\e[1;31m"
_color_yellow="$_color_bold\e[1;33m"
fi
fi
[[ $_image ]] || die "No image specified (use -h for help)"
[[ -f $_image ]] || die "No such file: %s" "$_image"
case $(( _optanalyze + _optlistcontents + _optshowconfig )) in
0)
# default action when none specified
_optlistcontents=1 ;;
[!1])
die "Only one action may be specified at a time" ;;
esac
# read compression type
case $(file -Lb "$_image") in
@(data|LZMA)*) _compress=lzma ;;
gzip*) _compress=gzip ;;
bzip2*) _compress=bzip2 ;;
lzop*) _compress=lzop ;;
XZ*) _compress=xz ;;
esac
if (( _optanalyze )); then
analyze_image "$_image"
elif (( _optshowconfig )); then
decomp "$_image" | bsdtar xOf - buildconfig 2>/dev/null ||
die 'Failed to extract config from image (mkinitcpio too old?)'
else
decomp "$_image" | bsdcpio -i --quiet $_optverbose $_list
fi
# vim: set ft=sh ts=4 sw=4 et:
|
