blob: d48d7d1fb30451466b7b1b2e03248c6f4b49935a (
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
|
#!/bin/sh
#
# Licensed under the GPLv2
#
# Copyright 2011, Red Hat, Inc.
# Harald Hoyer <harald@redhat.com>
ACTION="$1"
# Before trying to use /dev/console, verify that it exists,
# and that it can actually be used. When console=null is used,
# echo will fail. We do the check in a subshell, because otherwise
# the process will be killed when when running as PID 1.
# shellcheck disable=SC2217
[ -w /dev/console ] \
&& (echo < /dev/console > /dev/null 2> /dev/null) \
&& exec < /dev/console >> /dev/console 2>> /dev/console
export TERM=linux
export PATH=/usr/sbin:/usr/bin:/sbin:/bin
. /lib/dracut-lib.sh
if [ "$(stat -c '%T' -f /)" = "tmpfs" ]; then
mount -o remount,rw /
fi
mkdir -p /oldsys
for i in sys proc run dev; do
mkdir -p /oldsys/$i
mount --move /oldroot/$i /oldsys/$i
done
# if "kexec" was installed after creating the initramfs, we try to copy it from the real root
# libz normally is pulled in via kmod/modprobe and udevadm
if [ "$ACTION" = "kexec" ] && ! command -v kexec > /dev/null 2>&1; then
for p in /usr/sbin /usr/bin /sbin /bin; do
cp -a /oldroot/${p}/kexec $p > /dev/null 2>&1 && break
done
hash kexec
fi
trap "emergency_shell --shutdown shutdown Signal caught!" 0
getargs 'rd.break=pre-shutdown' && emergency_shell --shutdown pre-shutdown "Break before pre-shutdown"
source_hook pre-shutdown
warn "Killing all remaining processes"
killall_proc_mountpoint /oldroot || sleep 0.2
# Timeout for umount calls. The value can be set to 0 to wait forever.
_umount_timeout=$(getarg rd.shutdown.timeout.umount)
_umount_timeout=${_umount_timeout:-90s}
_timed_out_umounts=""
umount_a() {
local _verbose="n"
if [ "$1" = "-v" ]; then
_verbose="y"
shift
exec 7>&2
else
exec 7> /dev/null
fi
local _did_umount="n"
while read -r _ mp _ || [ -n "$mp" ]; do
strstr "$mp" oldroot || continue
strstr "$_timed_out_umounts" " $mp " && continue
# Unmount the file system. The operation uses a timeout to avoid waiting
# indefinitely if this is e.g. a stuck NFS mount. The command is
# invoked in a subshell to silence also the "Killed" message that might
# be produced by the shell.
(
set +m
timeout --signal=KILL "$_umount_timeout" umount "$mp"
) 2>&7
local ret=$?
if [ $ret -eq 0 ]; then
_did_umount="y"
warn "Unmounted $mp."
elif [ $ret -eq 137 ]; then
_timed_out_umounts="$_timed_out_umounts $mp "
warn "Unmounting $mp timed out."
elif [ "$_verbose" = "y" ]; then
warn "Unmounting $mp failed with status $ret."
fi
done < /proc/mounts
losetup -D 2>&7
exec 7>&-
[ "$_did_umount" = "y" ] && return 0
return 1
}
_cnt=0
while [ $_cnt -le 40 ]; do
umount_a || break
_cnt=$((_cnt + 1))
done
[ $_cnt -ge 40 ] && umount_a -v
if strstr "$(cat /proc/mounts)" "/oldroot"; then
warn "Cannot umount /oldroot"
for _pid in /proc/*; do
_pid=${_pid##/proc/}
case $_pid in
*[!0-9]*) continue ;;
esac
[ "$_pid" -eq $$ ] && continue
[ -e "/proc/$_pid/exe" ] || continue
[ -e "/proc/$_pid/root" ] || continue
if strstr "$(ls -l /proc/"$_pid" /proc/"$_pid"/fd 2> /dev/null)" "oldroot"; then
warn "Blocking umount of /oldroot [$_pid] $(cat /proc/"$_pid"/cmdline)"
else
warn "Still running [$_pid] $(cat /proc/"$_pid"/cmdline)"
fi
# shellcheck disable=SC2012
ls -l "/proc/$_pid/exe" 2>&1 | vwarn
# shellcheck disable=SC2012
ls -l "/proc/$_pid/fd" 2>&1 | vwarn
done
fi
_check_shutdown() {
local __f
local __s=0
for __f in "$hookdir"/shutdown/*.sh; do
[ -e "$__f" ] || continue
# shellcheck disable=SC1090 disable=SC2240
if (final="$1" . "$__f" "$1"); then
rm -f -- "$__f"
else
__s=1
fi
done
return $__s
}
_cnt=0
while [ $_cnt -le 40 ]; do
_check_shutdown && break
_cnt=$((_cnt + 1))
done
[ $_cnt -ge 40 ] && _check_shutdown final
if type plymouth > /dev/null 2>&1; then
plymouth --hide-splash
elif [ -x /oldroot/bin/plymouth ]; then
/oldroot/bin/plymouth --hide-splash
fi
getargs 'rd.break=shutdown' && emergency_shell --shutdown shutdown "Break before shutdown"
case "$ACTION" in
reboot | poweroff | halt)
$ACTION -f -n
warn "$ACTION failed!"
;;
kexec)
kexec -e
warn "$ACTION failed!"
reboot -f -n
;;
*)
warn "Shutdown called with argument '$ACTION'. Rebooting!"
reboot -f -n
;;
esac
emergency_shell --shutdown shutdown
|
