OpenWrt – Blame information for rev 2
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Rev | Author | Line No. | Line |
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1 | office | 1 | #!/bin/sh |
2 | # Copyright (C) 2006-2013 OpenWrt.org |
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3 | # Copyright (C) 2010 Vertical Communications |
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4 | |||
5 | boot_hook_splice_start() { |
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6 | export -n PI_HOOK_SPLICE=1 |
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7 | } |
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8 | |||
9 | boot_hook_splice_finish() { |
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10 | local hook |
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11 | for hook in $PI_STACK_LIST; do |
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12 | local v; eval "v=\${${hook}_splice:+\$${hook}_splice }$hook" |
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13 | export -n "${hook}=${v% }" |
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14 | export -n "${hook}_splice=" |
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15 | done |
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16 | export -n PI_HOOK_SPLICE= |
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17 | } |
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18 | |||
19 | boot_hook_init() { |
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20 | local hook="${1}_hook" |
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21 | export -n "PI_STACK_LIST=${PI_STACK_LIST:+$PI_STACK_LIST }$hook" |
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22 | export -n "$hook=" |
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23 | } |
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24 | |||
25 | boot_hook_add() { |
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26 | local hook="${1}_hook${PI_HOOK_SPLICE:+_splice}" |
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27 | local func="${2}" |
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28 | |||
29 | [ -n "$func" ] && { |
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30 | local v; eval "v=\$$hook" |
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31 | export -n "$hook=${v:+$v }$func" |
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32 | } |
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33 | } |
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34 | |||
35 | boot_hook_shift() { |
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36 | local hook="${1}_hook" |
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37 | local rvar="${2}" |
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38 | |||
39 | local v; eval "v=\$$hook" |
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40 | [ -n "$v" ] && { |
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41 | local first="${v%% *}" |
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42 | |||
43 | [ "$v" != "${v#* }" ] && \ |
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44 | export -n "$hook=${v#* }" || \ |
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45 | export -n "$hook=" |
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46 | |||
47 | export -n "$rvar=$first" |
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48 | return 0 |
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49 | } |
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50 | |||
51 | return 1 |
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52 | } |
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53 | |||
54 | boot_run_hook() { |
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55 | local hook="$1" |
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56 | local func |
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57 | |||
58 | while boot_hook_shift "$hook" func; do |
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59 | local ran; eval "ran=\$PI_RAN_$func" |
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60 | [ -n "$ran" ] || { |
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61 | export -n "PI_RAN_$func=1" |
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62 | $func "$1" "$2" |
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63 | } |
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64 | done |
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65 | } |
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66 | |||
67 | pivot() { # <new_root> <old_root> |
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68 | /bin/mount -o noatime,move /proc $1/proc && \ |
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69 | pivot_root $1 $1$2 && { |
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70 | /bin/mount -o noatime,move $2/dev /dev |
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71 | /bin/mount -o noatime,move $2/tmp /tmp |
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72 | /bin/mount -o noatime,move $2/sys /sys 2>&- |
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73 | /bin/mount -o noatime,move $2/overlay /overlay 2>&- |
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74 | return 0 |
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75 | } |
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76 | } |
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77 | |||
78 | fopivot() { # <rw_root> <work_dir> <ro_root> <dupe?> |
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79 | /bin/mount -o noatime,lowerdir=/,upperdir=$1,workdir=$2 -t overlay "overlayfs:$1" /mnt |
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80 | pivot /mnt $3 |
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81 | } |
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82 | |||
83 | ramoverlay() { |
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84 | mkdir -p /tmp/root |
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85 | /bin/mount -t tmpfs -o noatime,mode=0755 root /tmp/root |
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86 | mkdir -p /tmp/root/root /tmp/root/work |
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87 | fopivot /tmp/root/root /tmp/root/work /rom 1 |
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88 | } |