OpenWrt – Blame information for rev 4

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Rev Author Line No. Line
4 office 1 . /lib/functions.sh
2  
3 # copied from x86's platform.sh
4  
5 mbl_do_platform_check() {
6 local diskdev partdev diff
7  
8 [ "$#" -gt 1 ] && return 1
9  
10 export_bootdevice && export_partdevice diskdev -2 || {
11 echo "Unable to determine upgrade device"
12 return 1
13 }
14  
15 get_partitions "/dev/$diskdev" bootdisk
16  
17 #extract the boot sector from the image
18 get_image "$@" | dd of=/tmp/image.bs count=1 bs=512b 2>/dev/null
19  
20 get_partitions /tmp/image.bs image
21  
22 #compare tables
23 diff="$(grep -F -x -v -f /tmp/partmap.bootdisk /tmp/partmap.image)"
24  
25 rm -f /tmp/image.bs /tmp/partmap.bootdisk /tmp/partmap.image
26  
27 if [ -n "$diff" ]; then
28 echo "Partition layout has changed. Full image will be written."
29 ask_bool 0 "Abort" && exit 1
30 return 0
31 fi
32  
33 return 0;
34 }
35  
36 mbl_do_upgrade() {
37 local diskdev partdev diff
38  
39 export_bootdevice && export_partdevice diskdev -2 || {
40 echo "Unable to determine upgrade device"
41 return 1
42 }
43  
44 sync
45  
46 if [ "$SAVE_PARTITIONS" = "1" ]; then
47 get_partitions "/dev/$diskdev" bootdisk
48  
49 #extract the boot sector from the image
50 get_image "$@" | dd of=/tmp/image.bs count=1 bs=512b
51  
52 get_partitions /tmp/image.bs image
53  
54 #compare tables
55 diff="$(grep -F -x -v -f /tmp/partmap.bootdisk /tmp/partmap.image)"
56 else
57 diff=1
58 fi
59  
60 if [ -n "$diff" ]; then
61 get_image "$@" | dd of="/dev/$diskdev" bs=4096 conv=fsync
62  
63 # Separate removal and addtion is necessary; otherwise, partition 1
64 # will be missing if it overlaps with the old partition 2
65 partx -d - "/dev/$diskdev"
66 partx -a - "/dev/$diskdev"
67  
68 return 0
69 fi
70  
71 #iterate over each partition from the image and write it to the boot disk
72 while read part start size; do
73 # root is /dev/sd[a|b]2 and not /dev/sd[a|b] this causes some problem
74 # one of which is this offset, I'm not sure what's the best fix, so
75 # here's a WA.
76 let part=$((part - 2))
77 if export_partdevice partdev $part; then
78 echo "Writing image to /dev/$partdev..."
79 get_image "$@" | dd of="/dev/$partdev" ibs="512" obs=1M skip="$start" count="$size" conv=fsync
80 else
81 echo "Unable to find partition $part device, skipped."
82 fi
83 done < /tmp/partmap.image
84  
85 #copy partition uuid
86 echo "Writing new UUID to /dev/$diskdev..."
87 get_image "$@" | dd of="/dev/$diskdev" bs=1 skip=440 count=4 seek=440 conv=fsync
88 }
89  
90 mbl_copy_config() {
91 local partdev
92  
93 # Same as above /dev/sd[a|b]2 is root, so /boot is -1
94 if export_partdevice partdev -1; then
95 mount -t ext4 -o rw,noatime "/dev/$partdev" /mnt
96 cp -af "$CONF_TAR" /mnt/
97 umount /mnt
98 fi
99 }