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
|
#!/bin/sh
set -e
die() {
echo "die: $*"
exit 1
}
if [ "$(id -u)" != 0 ]; then
exec sudo -E -- "$0" "$@" || die "this script needs to run as root"
else
: "${SUDO_UID:=0}" "${SUDO_GID:=0}"
fi
if [ "$(uname -s)" = "Darwin" ]; then
export PATH="/usr/local/opt/e2fsprogs/bin:$PATH"
export PATH="/usr/local/opt/e2fsprogs/sbin:$PATH"
export PATH="/opt/homebrew/opt/e2fsprogs/bin:$PATH"
export PATH="/opt/homebrew/opt/e2fsprogs/sbin:$PATH"
fi
SCRIPT_DIR="$(dirname "${0}")"
# Prepend the toolchain qemu directory so we pick up QEMU from there
PATH="$SCRIPT_DIR/../Toolchain/Local/qemu/bin:$PATH"
# Also prepend the i686 toolchain directory because that's where most
# people will have their QEMU binaries if they built them before the
# directory was changed to Toolchain/Local/qemu.
PATH="$SCRIPT_DIR/../Toolchain/Local/i686/bin:$PATH"
disk_usage() {
# shellcheck disable=SC2003
if [ "$(uname -s)" = "Darwin" ]; then
expr "$(du -sk "$1" | cut -f1)"
else
expr "$(du -sk --apparent-size "$1" | cut -f1)"
fi
}
inode_usage() {
find "$1" | wc -l
}
INODE_SIZE=128
INODE_COUNT=$(($(inode_usage "$SERENITY_SOURCE_DIR/Base") + $(inode_usage Root)))
DISK_SIZE_BYTES=$((($(disk_usage "$SERENITY_SOURCE_DIR/Base") + $(disk_usage Root) + INODE_COUNT) * 1024))
# Try to use heuristics to guess a good disk size and inode count.
# The disk must notably fit:
# * Data blocks (for both files and directories),
# * Indirect/doubly indirect/triply indirect blocks,
# * Inodes and block bitmaps for each block group,
# * Plenty of extra free space and free inodes.
DISK_SIZE_BYTES=$(((DISK_SIZE_BYTES + (INODE_COUNT * INODE_SIZE * 2)) * 3))
INODE_COUNT=$((INODE_COUNT * 7))
USE_EXISTING=0
if [ -f _disk_image ]; then
USE_EXISTING=1
echo "checking existing image"
result=0
e2fsck -f -y _disk_image || result=$?
if [ $result -ge 4 ]; then
rm -f _disk_image
USE_EXISTING=0
echo "failed, not using existing image"
else
echo "done"
fi
fi
if [ $USE_EXISTING -eq 1 ]; then
OLD_DISK_SIZE_BYTES=$(wc -c < _disk_image)
if [ $DISK_SIZE_BYTES -gt "$OLD_DISK_SIZE_BYTES" ]; then
echo "resizing disk image..."
qemu-img resize -f raw _disk_image $DISK_SIZE_BYTES || die "could not resize disk image"
if ! resize2fs _disk_image; then
rm -f _disk_image
USE_EXISTING=0
echo "failed, not using existing image"
fi
echo "done"
fi
fi
if [ $USE_EXISTING -ne 1 ]; then
printf "setting up disk image... "
qemu-img create -q -f raw _disk_image $DISK_SIZE_BYTES || die "could not create disk image"
chown "$SUDO_UID":"$SUDO_GID" _disk_image || die "could not adjust permissions on disk image"
echo "done"
printf "creating new filesystem... "
if [ "$(uname -s)" = "OpenBSD" ]; then
VND=$(vnconfig _disk_image)
(echo "e 0"; echo 83; echo n; echo 0; echo "*"; echo "quit") | fdisk -e "$VND"
newfs_ext2fs -D $INODE_SIZE -n $INODE_COUNT "/dev/r${VND}i" || die "could not create filesystem"
else
if [ -x /sbin/mke2fs ]; then
/sbin/mke2fs -q -I $INODE_SIZE -N $INODE_COUNT _disk_image || die "could not create filesystem"
else
mke2fs -q -I $INODE_SIZE -N $INODE_COUNT _disk_image || die "could not create filesystem"
fi
fi
echo "done"
fi
printf "mounting filesystem... "
mkdir -p mnt
use_genext2fs=0
if [ "$(uname -s)" = "Darwin" ]; then
mount_cmd="fuse-ext2 _disk_image mnt -o rw+,allow_other,uid=501,gid=20"
elif [ "$(uname -s)" = "OpenBSD" ]; then
mount_cmd="mount -t ext2fs "/dev/${VND}i" mnt/"
elif [ "$(uname -s)" = "FreeBSD" ]; then
MD=$(mdconfig _disk_image)
mount_cmd="fuse-ext2 -o rw+,direct_io "/dev/${MD}" mnt/"
else
mount_cmd="mount _disk_image mnt/"
fi
if ! eval "$mount_cmd"; then
if command -v genext2fs 1>/dev/null ; then
echo "mount failed but genext2fs exists, use it instead"
use_genext2fs=1
else
die "could not mount filesystem and genext2fs is missing"
fi
else
echo "done"
fi
cleanup() {
if [ -d mnt ]; then
if [ $use_genext2fs = 0 ] ; then
printf "unmounting filesystem... "
umount mnt || ( sleep 1 && sync && umount mnt )
rmdir mnt
else
rm -rf mnt
fi
if [ "$(uname -s)" = "OpenBSD" ]; then
vnconfig -u "$VND"
elif [ "$(uname -s)" = "FreeBSD" ]; then
mdconfig -d -u "$MD"
fi
echo "done"
fi
}
trap cleanup EXIT
script_path=$(cd -P -- "$(dirname -- "$0")" && pwd -P)
"$script_path/build-root-filesystem.sh"
if [ $use_genext2fs = 1 ]; then
# regenerate new image, since genext2fs is unable to reuse the previously written image.
# genext2fs is very slow in generating big images, so I use a smaller image here. size can be updated
# if it's not enough.
# not using "-I $INODE_SIZE" since it hangs. Serenity handles whatever default this uses instead.
genext2fs -B 4096 -b $((DISK_SIZE_BYTES / 4096)) -d mnt _disk_image || die "try increasing image size (genext2fs -b)"
# if using docker with shared mount, file is created as root, so make it writable for users
chmod 0666 _disk_image
fi
|
