blob: aa27e717dd712158bf5ce38ae9b1f0c503371e38 (
plain)
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
|
#!/bin/bash
#
# lsinitcpio - dump the contents of an initramfs image
#
shopt -s extglob
declare verbose=
declare list='--list'
declare -i color=1
declare NC= BOLD= BLUE= GREEN= RED= YELLOW=
declare FUNCTIONS=functions
usage() {
cat<<USAGE
lsinitramfs %VERSION%
usage: ${0##*/} [options] <initramfs>
Options:
-a analyze contents
-h display this help
-n disable colorized output
-v more verbose output
-x extract image to disk
USAGE
exit 1
}
in_array() {
local item needle=$1; shift
for item; do
[[ "$item" == $needle ]] && return 0 # Found
done
return 1 # Not Found
}
decomp() {
${compress:-cat} ${compress:+-cd} "$@"
}
. "$FUNCTIONS"
# override the die method from functions
die() {
error "$@"
exit 1
}
while getopts ':ahnvx' flag; do
case $flag in
a) analyze=1 ;;
h) usage ;;
n) color=0 ;;
v) verbose='--verbose' ;;
x) unset list ;;
\?) die "invalid option -- '$OPTARG'" ;;
esac
done
shift $(( OPTIND - 1 ))
declare image=$1
if [[ -t 1 ]] && (( color )); then
# prefer terminal safe colored and bold text when tput is supported
if tput setaf 0 &>/dev/null; then
NC="$(tput sgr0)"
BOLD="$(tput bold)"
BLUE="$BOLD$(tput setaf 4)"
GREEN="$BOLD$(tput setaf 2)"
RED="$BOLD$(tput setaf 1)"
YELLOW="$BOLD$(tput setaf 3)"
else
NC="\e[1;0m"
BOLD="\e[1;1m"
BLUE="$BOLD\e[1;34m"
GREEN="$BOLD\e[1;32m"
RED="$BOLD\e[1;31m"
YELLOW="$BOLD\e[1;33m"
fi
fi
readonly NC BOLD BLUE GREEN RED YELLOW
[[ $image ]] || usage
[[ -f $image ]] || die "$image: No such file"
# 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 (( analyze )); then
declare -a binaries explicitmod modules foundhooks hooks
declare kernver ratio columns=$(tput cols)
# calculate compression ratio
if [[ $compress ]]; then
TIMEFORMAT=%R decomptime=$({ time decomp "$image" >/dev/null; } 2>&1 )
ratio=.$(( $(stat -c %s "$image") * 1000 /
$(decomp "$image" | bsdtar xOf - | wc -c) % 1000 ))
fi
# read contents of image
while read -r line; do
if [[ $line = *.ko?(.gz) ]]; then # module
if [[ -z $kernver ]]; then
[[ $line =~ /lib/modules/([^/]+)/ ]] && kernver=${BASH_REMATCH[1]}
fi
line=${line##*/}
modules+=("${line%.ko?(.gz)}")
continue
elif [[ $line = ./hooks/* ]]; then
foundhooks+=("${line##*/}")
elif [[ $line = *@(/bin/|/sbin/)* ]]; then
binaries+=("${line#.}")
fi
done < <(decomp "$image" | bsdtar tf -)
read -r version < <(decomp "$image" | bsdtar xOf - VERSION 2>/dev/null)
# source and read config
. <(decomp "$image" | bsdtar xOf - config)
explicitmod=($MODULES)
for hook in $HOOKS; do
in_array "$hook" "${foundhooks[@]}" && hooks+=("$hook")
done
# 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}"
if [[ $compress ]]; then
msg 'Compressed with: %s' "$compress"
msg2 'Compression ratio: %s' "$ratio"
msg2 'Estimated decompression time: %ss' "$decomptime"
fi
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 (( ${#hooks[*]} )); then
msg 'Hook run order:'
printf ' %s\n' "${hooks[@]}"
printf '\n'
fi
else
decomp "$image" | bsdcpio -i --quiet $verbose $list
fi
# vim: set ft=sh ts=4 sw=4 et:
|
