1 | # |
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2 | # Copyright (c) 2005 XenSource Ltd. |
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3 | # |
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4 | # This library is free software; you can redistribute it and/or |
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5 | # modify it under the terms of version 2.1 of the GNU Lesser General Public |
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6 | # License as published by the Free Software Foundation. |
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7 | # |
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8 | # This library is distributed in the hope that it will be useful, |
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9 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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10 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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11 | # Lesser General Public License for more details. |
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12 | # |
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13 | # You should have received a copy of the GNU Lesser General Public |
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14 | # License along with this library; if not, write to the Free Software |
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15 | # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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16 | # |
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17 | |
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18 | |
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19 | dir=$(dirname "$0") |
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20 | . "$dir/logging.sh" |
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21 | . "$dir/xen-script-common.sh" |
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22 | . "$dir/locking.sh" |
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23 | |
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24 | exec 2>>/var/log/xen/xen-hotplug.log |
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25 | |
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26 | export PATH="/sbin:/bin:/usr/bin:/usr/sbin:$PATH" |
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27 | export LANG="POSIX" |
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28 | unset $(set | grep ^LC_ | cut -d= -f1) |
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29 | |
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30 | fatal() { |
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31 | xenstore_write "$XENBUS_PATH/hotplug-error" "$*" \ |
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32 | "$XENBUS_PATH/hotplug-status" error |
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33 | log err "$@" |
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34 | exit 1 |
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35 | } |
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36 | |
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37 | success() { |
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38 | # Tell DevController that backend is "connected" |
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39 | xenstore_write "$XENBUS_PATH/hotplug-status" connected |
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40 | } |
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41 | |
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42 | do_or_die() { |
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43 | "$@" || fatal "$@ failed" |
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44 | } |
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45 | |
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46 | do_without_error() { |
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47 | "$@" 2>/dev/null || log debug "$@ failed" |
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48 | } |
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49 | |
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50 | sigerr() { |
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51 | fatal "$0 failed; error detected." |
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52 | } |
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53 | |
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54 | trap sigerr ERR |
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55 | |
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56 | |
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57 | ## |
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58 | # xenstore_read <path>+ |
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59 | # |
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60 | # Read each of the given paths, returning each result on a separate line, or |
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61 | # exit this script if any of the paths is missing. |
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62 | # |
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63 | xenstore_read() { |
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64 | local v=$(xenstore-read "$@" || true) |
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65 | [ "$v" != "" ] || fatal "xenstore-read $@ failed." |
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66 | echo "$v" |
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67 | } |
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68 | |
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69 | |
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70 | ## |
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71 | # xenstore_read_default <path> <default> |
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72 | # |
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73 | # Read the given path, returning the value there or the given default if the |
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74 | # path is not present. |
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75 | # |
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76 | xenstore_read_default() { |
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77 | xenstore-read "$1" 2>/dev/null || echo "$2" |
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78 | } |
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79 | |
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80 | |
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81 | ## |
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82 | # xenstore_write (<path> <value>)+ |
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83 | # |
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84 | # Write each of the key/value pairs to the store, and exit this script if any |
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85 | # such writing fails. |
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86 | # |
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87 | xenstore_write() { |
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88 | log debug "Writing $@ to xenstore." |
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89 | xenstore-write "$@" || fatal "Writing $@ to xenstore failed." |
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90 | } |
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91 | |
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92 | |
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93 | log debug "$@" "XENBUS_PATH=$XENBUS_PATH" |
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