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
|
#!/bin/bash
# mkswapfile This shell script takes care of starting and stopping
# the mkswapfile.
#
# chkconfig: 2345 35 65
# description: mkswapfile is a script to create swap file for DRBL client. This service must after netfs
#
# Author: Blake, Kuo-Lien Huang
# License: GPL
# Description:
# start|stop mkswapfile in drbl client.
#
# For SuSE insserv
### BEGIN INIT INFO
# Provides: mkswapfile
# Required-Start: $network $portmap $remote_fs
# Required-Stop: $network $portmap $remote_fs
# X-UnitedLinux-Should-Start:
# X-UnitedLinux-Should-Stop:
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Description: Start the swapfile
### END INIT INFO
# Modified by Steven Shiau <steven _at_ clonezilla org>, Ceasar Sun <ceasar _at_ nchc org tw> to use it in DRBL
# This file is borrowed from Knoppix (http://www.knoppix.org).
# Setting
SWAP_FILE=drbl.swap
# Source function library.
[ -f /etc/rc.d/init.d/functions ] && . /etc/rc.d/init.d/functions
# For SuSE
[ -e /etc/rc.status ] && . /etc/rc.status
# Load DRBL setting and functions
DRBL_SCRIPT_PATH="${DRBL_SCRIPT_PATH:-/usr/share/drbl}"
. $DRBL_SCRIPT_PATH/sbin/drbl-conf-functions
# Source mkswapfile configuration.
# It contains the maxswapsize (MB)
# like: maxswapsize=512
[ ! -f $SYSCONF_PATH/mkswapfile ] && exit 1
. $SYSCONF_PATH/mkswapfile
[ -z "$maxswapsize" ] && exit 1
newswapfile() {
total_swap_size=0
# Maximum swap file size
maxswapsize=$1
# Find exist swap partitions
for p in `fdisk -l | grep "Linux swap" | cut -d" " -f1`; do
echo "Using the existing swap partition in $p"
swapon $p
exist_swap_size=`cat /proc/swaps | grep $p | awk -F" " '{print $3}'`
exist_swap_size_in_MB=`expr $exist_swap_size / 1000`
echo "$p with size $exist_swap_size_in_MB (MB)."
total_swap_size=`expr $exist_swap_size_in_MB + $total_swap_size`
[ $total_swap_size -ge $maxswapsize ] && return 0
done
# Create swap files in exist partitions
avail_part="$(LC_ALL=C fdisk -l 2>/dev/null | grep "^\/dev\/" | awk '{ if($2=="*" && $6!="f" && $6!="0" && $6!="5") print $1; if($2!="*" && $5!="f" && $5!="0" && $5!="5") print $1; }')"
for p in $avail_part; do
part_fs="$(LC_ALL=C ocs-get-dev-info $p type filesystem)"
rc=$?
[ "$rc" -gt 0 ] && continue
case "$part_fs" in *[Ss][Ww][Aa][Pp]*|*extended*) continue ;; esac
# If NTFS, skip it since it's readonly if mounting via kernel. If the future maybe we will use ntfs-3g.
if [ -n "$(echo "$part_fs" | grep -iE "ntfs")" ]; then
echo "Skip creating swap file in NTFS partition $p..."
continue
fi
# Initial value
Swap_2_create=0
SwapSize_Need=0
exist_size_in_MB=0
#
SwapSize_Need=`expr $maxswapsize - $total_swap_size`
d="/tmp/${p##*/}"
f="$d/$SWAP_FILE"
mkdir -p $d
# Mount the partition, check the size, create the swap file
if mount $p $d; then
if [ -f "$f" ]; then
exist_size_in_bytes="$(stat -c "%s" $f)"
exist_size_in_MB="$(echo "scale=0; $exist_size_in_bytes /1024/1024" |bc -l)"
echo "exist_size_in_MB = $exist_size_in_MB"
fi
## check the partition size, use 60% for swap
AVAIL=$(df --block-size=1M $d | awk '/^\/dev\//{print $4}')
AVAIL=`expr $AVAIL + $exist_size_in_MB`
AVAIL=$(echo "scale=0; $AVAIL * 3 / 5 " |bc -l)
if [ "$SwapSize_Need" -gt "$AVAIL" ]; then
Swap_2_create=$AVAIL
else
Swap_2_create=$SwapSize_Need
fi
# when the swap file if not exist, or the existing swapfile size
# is not matched, create it.
if [ ! -f "$f" -o "$exist_size_in_MB" -ne "$Swap_2_create" ]; then
echo "Creating a swap file $f with size $Swap_2_create MB..."
dd if=/dev/zero of="$f" bs=1M count="$Swap_2_create"
retv=$?
if [ "$retv" -eq 0 ]; then
[ -e "$f" ] && chmod 600 $f 2>/dev/null
else
# maybe the partition filesystem is ntfs, which is normally ro.
echo "The swap file $f can NOT be created!"
fi
else
echo "Found an existing swap file with size $exist_size_in_MB MB (It makes the total swap file size is $maxswapsize MB), use that!"
fi
# force to format the file as swapfile no matter it is or not.
[ -e "$f" ] && mkswap -v1 "$f" && swapon -v "$f" &
fi
# check if the total_swap_size is greater than $maxswapsize
total_swap_size=`expr $Swap_2_create + $total_swap_size`
[ "$total_swap_size" -ge "$maxswapsize" ] && return 0
done
if [ "$total_swap_size" -eq 0 ]; then
echo "No writable partition is available. Skip creating swap file!"
fi
}
rmswapfile() {
for p in `fdisk -l | grep "^\/dev\/" | awk '{ if($2=="*" && $6!="f" && $6!="0") print $1; if($2!="*" && $5!="f" && $5!="0") print $1; }'`
do
d="/tmp/${p##*/}"
f="$d/$SWAP_FILE"
if [ -f "$f" ]; then
/sbin/swapoff -v "$f"
# do not remove, so that next time we can use, this should be better,
# otherwise client has to spend some time to dd again.
#rm -f $f
fi
if [ "$(mount | grep "$d")" != "" ]; then
umount $d
fi
done
swapoff -a
}
###
case "$1" in
"start")
#echo "Creating swap file (Upto $maxswapsize Mb) if the harddisk is available... This may take few minitues."
if [ -e /etc/debian_version ]; then
# Debian
echo -n "Starting mkswapfile services... "
start-stop-daemon --start --quiet \
--pidfile /var/run/mkswapfile.pid --exec $0 -- newswapfile $maxswapsize
elif [ -e /etc/SuSE-release ]; then
# SuSE
echo -n "Starting mkswapfile services... "
newswapfile $maxswapsize
rc_status -v
else
# RH-like
action $"Starting mkswapfile services: " $0 newswapfile $maxswapsize
RETVAL=$?
[ "$RETVAL" = 0 ] && touch /var/lock/subsys/mkswapfile
fi
;;
"stop")
#echo "Removing swap file... This may take few minitues."
if [ -e /etc/debian_version ]; then
# Debian
echo -n "Stopping mkswapfile services... "
$0 rmswapfile
echo "done!"
elif [ -e /etc/SuSE-release ]; then
# SuSE
echo -n "Stopping mkswapfile services... "
rmswapfile $maxswapsize
rc_status -v
else
# RH-like
action $"Stopping mkswapfile services: " $0 rmswapfile
RETVAL=$?
[ "$RETVAL" = 0 ] && rm -f /var/lock/subsys/mkswapfile
fi
;;
"newswapfile")
newswapfile $maxswapsize
;;
"rmswapfile")
rmswapfile
;;
restart)
$0 stop
$0 start
;;
*)
echo $"Usage: $0 {start|stop|restart}"
exit 1
esac
exit 0
|
