summaryrefslogtreecommitdiff
path: root/archiso/mkarchiso
blob: f4e8207146eb1cbdda09d295ab25169df4150b4f (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
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
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
#! /bin/bash

PKGLIST=""
QUIET="y"
FORCE="n"
PACCONFIG="/etc/pacman.conf"
export LABEL="ARCHISO_$(pwgen -n 8 1 | tr [a-z] [A-Z])"
PUBLISHER="Arch Linux <http://www.archlinux.org>"
APPLICATION="Arch Linux Live/Rescue CD"
CREATE_DEFAULT="n"

APPNAME=$(basename "${0}")

# usage: usage <exitvalue>
usage ()
{
    echo "usage ${APPNAME} [options] command <command options>"
    echo " general options:"
    echo "    -f               Force overwrite of working files/squashfs image/bootable image"
    echo "    -p PACKAGE(S)    Additional package(s) to install, can be used multiple times"
    echo "    -C <file>        Config file for pacman. Default $PACCONFIG"
    echo "    -L <label>       Set a label for the disk"
    echo "    -P <publisher>   Set a publisher for the disk"
    echo "    -A <application> Set an application name for the disk"
    echo "    -d               Create default user directory /home/arch"
    echo "    -v               Enable verbose output"
    echo "    -h               This message"
    echo " commands:"
    echo "   create <dir>"
    echo "      create a base directory layout to work with"
    echo "      includes all specified packages"
    echo "   iso -p <bootloader> <dir> <image name>"
    echo "      build an iso image from the working dir"
    echo "   usb -p <bootloader> <dir> <image name>"
    echo "      build an iso image from the working dir"
    exit $1
}

while getopts 'p:C:L:P:A:dfvh' arg; do
    case "${arg}" in
        p) PKGLIST="${PKGLIST} ${OPTARG}" ;;
        C) PACCONFIG="${OPTARG}" ;;
    	L) LABEL="${OPTARG}" ;;
    	P) PUBLISHER="${OPTARG}" ;;
    	A) APPLICATION="${OPTARG}" ;;
        d) CREATE_DEFAULT="y" ;;
        f) FORCE="y" ;;
        v) QUIET="n" ;;
        h|?) usage 0 ;;
        *) echo "invalid argument '${arg}'"; usage 1 ;;
    esac
done

#trim spaces
PKGLIST="$(echo $PKGLIST)"

shift $(($OPTIND - 1))

# do UID checking here so someone can at least get usage instructions
if [ "$EUID" != "0" ]; then
    echo "error: This script must be run as root."
    exit 1
fi

if [ ! -f "$PACCONFIG" ]; then
    echo "error: pacman config file '$PACCONFIG' does not exist"
    exit 1
fi

command_name="${1}"
work_dir=""
imgname=""

case "${command_name}" in
    create) work_dir="${2}"; imgname="none" ;;
    iso) work_dir="${2}"; imgname="${3}" ;;
    usb) work_dir="${2}"; imgname="${3}" ;;
    *) echo "invalid command name '${command_name}'"; usage 1 ;;
esac

[ "x${imgname}" = "x" ] && echo "Image name must be specified" && usage 1
[ "x${work_dir}" = "x" ] && echo "Please specify a working directory" && usage 1

echo "${APPNAME} : Configuration Settings"
echo "        working directory:   ${work_dir}"
echo "               image name:   ${imgname}"

# usage: _pacman <packages>...
_pacman ()
{
    local ret
    if [ "${QUIET}" = "y" ]; then
        mkarchroot -C "$PACCONFIG" -f "${work_dir}/root-image" $* 2>&1 >/dev/null
        ret=$?
    else
        mkarchroot -C "$PACCONFIG" -f "${work_dir}/root-image" $*
        ret=$?
    fi

    # Cleanup
    find "${work_dir}" -name *.pacnew -name *.pacsave -name *.pacorig -delete

    if [ $ret -ne 0 ]; then
        exit 1
    fi
}

command_create () {
    echo "====> Creating working directory: ${work_dir}"
    mkdir -p "${work_dir}/iso/"
    mkdir -p "${work_dir}/root-image/"
    echo "# archiso isomounts file
# img - location of image/directory to mount relative to addons directory
# arch - architecture of this image
# mount point - absolute location on the post-initrd root
# type - either 'bind' or 'squashfs' for now

# syntax: <img> <arch> <mount point> <type>

# NOTE: Order matters. If the same file exists in multiple
#  images, the FIRST one mounted, top-down, will take precedence

root-image.sqfs i686 / squashfs
#root-image-x86_64.sqfs x86_64 / squashfs" > "${work_dir}/isomounts"

    echo "README for this archiso created directory

All directories in this dir, except for 'iso' will be squashed
with squashfs and put into the iso dir as iso/<dirname>.sqfs
This should be reflected in the isomounts file

The iso dir is later used to build the actual bootable iso.
Please ensure the proper bootloader is installed or copied
to the iso/ directory.

...TODO: Write more..." > "${work_dir}/README"

    if [ "${PKGLIST}" != "" ]; then
        echo "====> Installing packages to '${work_dir}/root-image/'"
        _pacman "${PKGLIST}"

        echo "Cleaning up what we can"
        if [ -d "${work_dir}/root-image/boot/" ]; then
            # remove the initcpio images that were generated for the host system
            find "${work_dir}/root-image/boot" -name '*.img' -delete
        fi

        #TODO is this needed? do it at the Makefile level?
        if [ ${CREATE_DEFAULT} == "y" ]; then
            if [ -d "${work_dir}/root-image/home/" ]; then
                echo "Creating default home directory"
                install -d -o1000 -g100 -m0755 "${work_dir}/root-image/home/arch"
            fi
        fi

        # delete a lot of unnecessary cache/log files
        kill_dirs="var/abs var/cache/man var/cache/pacman var/lib/pacman/sync var/log/* var/mail tmp/* initrd"
        for x in ${kill_dirs}; do
            if [ -e "${work_dir}/root-image/${x}" ]; then
                rm -rf "${work_dir}/root-image/${x}"
            fi
        done
    fi
}

# _mksquash dirname
_mksquash () {
    if [ ! -d "$1" ]; then
        echo "Error: '$1' is not a directory"
        return 1
    fi

    sqimg="${work_dir}/iso/$(basename ${1}).sqfs"
    echo "====> Generating SquashFS image for '${1}'"
    if [ -e "${sqimg}" ]; then
        dirhaschanged=$(find ${1} -newer ${sqimg})
        if [ "${dirhaschanged}" != "" ]; then
            echo "SquashFS image '${sqimg}' is not up to date, rebuilding..."
            rm "${sqimg}"
        else
            echo "SquashFS image '${sqimg}' is up to date, skipping."
            return
        fi
    fi

    echo "Creating SquashFS image. This may take some time..."
    start=$(date +%s)
    if [ "${QUIET}" = "y" ]; then
        mksquashfs "${1}" "${sqimg}" -noappend >/dev/null
    else
        mksquashfs "${1}" "${sqimg}" -noappend
    fi
    minutes=$(echo $start $(date +%s) | awk '{ printf "%0.2f",($2-$1)/60 }')
    echo "Image creation done in $minutes minutes."
}

_imgcommon () {
    for d in $(find "${work_dir}" -maxdepth 1 -type d -name '[^.]*'); do
        if [ "$d" != "${work_dir}/iso" -a \
             "$(basename "$d")" != "iso" -a \
             "$d" != "${work_dir}" ]; then
            _mksquash "$d"
        fi
    done

    echo "====> Making bootable image"

    # Sanity checks
    if [ ! -d "${work_dir}/iso" ]; then
        echo "Error: '${work_dir}/iso' doesn't exist. What did you do?!"
        exit 1
    fi

    if [ ! -f "${work_dir}/isomounts" ]; then
        echo "Error: the isomounts file doesn't exist. This image won't do anything"
        echo "  Protecting you from yourself and erroring out here..."
        exit 1
    fi

    if [ -e "${imgname}" ]; then
        if [ "${FORCE}" = "y" ]; then
            echo "Removing existing bootable image..."
            rm -rf "${imgname}"
        else
            echo "error: Image '${imgname}' already exists, aborting."
            exit 1
        fi
    fi

    cp "${work_dir}/isomounts" "${work_dir}/iso/"

    [ -f ${work_dir}/iso/boot/grub/menu.lst ] && sed "s|archisolabel=[^ ]*|archisolabel=${LABEL}|" -i ${work_dir}/iso/boot/grub/menu.lst
    [ -f ${work_dir}/iso/boot/isolinux/isolinux.cfg ] && sed "s|archisolabel=[^ ]*|archisolabel=${LABEL}|" -i ${work_dir}/iso/boot/isolinux/isolinux.cfg
}

command_iso () {
    _imgcommon

    bootflags=""
    if [ "$PKGLIST" = "grub" -o "$PKGLIST" = "grub-gfx" ]; then
        if [ ! -e "${work_dir}/iso/boot/grub/stage2_eltorito" ]; then
            echo "error: grub stage files not found in '${work_dir}/iso/boot/grub'"
            exit 1
        fi

        bootflags="-b boot/grub/stage2_eltorito"
    elif [ "$PKGLIST" = "syslinux" ]; then
        if [ ! -e "${work_dir}/iso/boot/isolinux/isolinux.bin" ]; then
            echo "error: isolinux bin file not found in '${work_dir}/iso/boot/isolinux'"
            exit 1
        fi

        bootflags="-b boot/isolinux/isolinux.bin -c boot/isolinux/boot.cat"
    else
        echo "No bootloader specified. Use the -p flag to specify"
        echo "  Supported Bootloaders:"
        echo "     grub"
        echo "     grub-gfx"
        echo "     syslinux"
        exit 1
    fi

    echo "Creating ISO image..."
    qflag=""
    [ "${QUIET}" = "y" ] && qflag="-quiet"
    mkisofs ${qflag} -r -l $bootflags -uid 0 -gid 0 \
    	-udf -allow-limited-size -iso-level 3 \
        -input-charset utf-8 -p "prepared by mkarchiso" \
        -no-emul-boot -boot-load-size 4 -boot-info-table \
        -publisher "${PUBLISHER}" \
        -A "${APPLICATION}" \
        -V "${LABEL}" \
        -o "${imgname}" "${work_dir}/iso/"
}

command_usb () {
    _imgcommon

    modprobe -q loop > /dev/null 2>&1

    # Calculate cylinder size in bytes
    CYL_SIZE=$((255*63*512))

    # First partition offset
    PART_OFFSET=$((63*512))

    # ext2 overhead's upper bound is 6%, empirically tested up to 1GB
    rootsize=$(du -bs "${work_dir}/iso" | cut -f1)
    imgsz=$(( (${rootsize}*106)/100/${CYL_SIZE} + 1 )) # image size in cylinders

    # Get next free loop device
    devloop=$(losetup -f)

    # create the filesystem image file
    dd if=/dev/zero of="$imgname" bs="$CYL_SIZE" count="$imgsz"

    # Setup a loop device, and skip the first 63 sectors
    losetup "$devloop" -o "$PART_OFFSET" "$imgname"

    # create a filesystem on the image
    mke2fs -m 0 -F -L "${LABEL}" "$devloop"

    # mount the filesystem and copy data
    TMPDIR=$(mktemp -d archiso-usbXXXXXX)
    mount "$devloop" "$TMPDIR"
    cp -a "${work_dir}"/iso/* "$TMPDIR"
    umount -d "$TMPDIR"
    rm -rf "$TMPDIR"

    # create a partition table
    fdisk -C "$imgsz" -H 255 -S 63 "$imgname" << EOF
n
p
1


a
1
p
w
EOF

    # install grub on the image
    grub --no-floppy --batch << EOF
device (hd0) ${imgname}
root (hd0,0)
setup (hd0)
EOF

}

# Go through the main commands in order. If 'all' was specified, then we want
# to do everything. Start with 'install'.
if [ "${command_name}" = "create"  ]; then
    command_create
fi
if [ "${command_name}" = "iso" ]; then
    command_iso
fi
if [ "${command_name}" = "usb" ]; then
    command_usb
fi

# vim:ts=4:sw=4:et: