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
|
#!/usr/bin/ash
udevd_running=0
mount_handler=default_mount_handler
init=/sbin/init
rd_logmask=0
. /init_functions
mount -t proc proc /proc -o nosuid,noexec,nodev
mount -t sysfs sys /sys -o nosuid,noexec,nodev
mount -t devtmpfs dev /dev -o mode=0755,nosuid
mount -t tmpfs run /run -o nosuid,nodev,mode=0755
mkdir -m755 /run/initramfs
# parse the kernel command line
parse_cmdline </proc/cmdline
# setup logging as early as possible
rdlogger_start
for d in ${disablehooks//,/ }; do
[ -e "/hooks/$d" ] && chmod 644 "/hooks/$d"
done
. /config
run_hookfunctions 'run_earlyhook' 'early hook' $EARLYHOOKS
if [ -n "$earlymodules$MODULES" ]; then
modprobe -qab ${earlymodules//,/ } $MODULES
fi
run_hookfunctions 'run_hook' 'hook' $HOOKS
# honor the old behavior of break=y as a synonym for break=premount
if [ "${break}" = "y" ] || [ "${break}" = "premount" ]; then
echo ":: Pre-mount break requested, type 'exit' to resume operation"
launch_interactive_shell
fi
rootdev=$(resolve_device "$root") && root=$rootdev
unset rootdev
fsck_root
# Mount root at /new_root
"$mount_handler" /new_root
run_hookfunctions 'run_latehook' 'late hook' $LATEHOOKS
run_hookfunctions 'run_cleanuphook' 'cleanup hook' $CLEANUPHOOKS
if [ "$(stat -c %D /)" = "$(stat -c %D /new_root)" ]; then
# Nothing got mounted on /new_root. This is the end, we don't know what to do anymore
# We fall back into a shell, but the shell has now PID 1
# This way, manual recovery is still possible.
err "Failed to mount the real root device."
echo "Bailing out, you are on your own. Good luck."
echo
launch_interactive_shell --exec
elif [ ! -x "/new_root${init}" ]; then
# Successfully mounted /new_root, but ${init} is missing
# The same logic as above applies
err "Root device mounted successfully, but ${init} does not exist."
echo "Bailing out, you are on your own. Good luck."
echo
launch_interactive_shell --exec
fi
if [ "${break}" = "postmount" ]; then
echo ":: Post-mount break requested, type 'exit' to resume operation"
launch_interactive_shell
fi
# this should always be the last thing we do before the switch_root.
rdlogger_stop
exec env -i \
"TERM=$TERM" \
/usr/bin/switch_root /new_root $init "$@"
# vim: set ft=sh ts=4 sw=4 et:
|
