61 lines
1.7 KiB
Bash
Executable File
61 lines
1.7 KiB
Bash
Executable File
#!/bin/sh
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DATA_PRE="/var/lib/cloud/sem/bootper"
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INST_PRE="/var/lib/cloud/instance/sem/bootper"
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Usage() {
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cat <<EOF
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Usage: ${0##*/} frequency name cmd [ arg1 [ arg2 [ ... ] ]
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run cmd with arguments provided.
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This utility can make it easier to use boothooks or bootcmd
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on a per "once" or "always" basis.
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If frequency is:
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* once: run only once (do not re-run for new instance-id)
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* instance: run only the first boot for a given instance-id
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* always: run every boot
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EOF
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}
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error() { echo "$@" 1>&2; }
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fail() { [ $# -eq 0 ] || error "$@"; exit 1; }
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# support the old 'cloud-init-run-module freq name "execute" cmd arg1'
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# if < 3 arguments, it will fail below on usage.
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if [ "${0##*/}" = "cloud-init-run-module" ]; then
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if [ $# -le 2 -o "$3" = "execute" ]; then
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error "Warning: ${0##*/} is deprecated. Please use cloud-init-per."
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freq=$1; name=$2;
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[ $# -le 2 ] || shift 3;
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set -- "$freq" "$name" "$@"
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else
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fail "legacy cloud-init-run-module only supported with module 'execute'"
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fi
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fi
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[ "$1" = "-h" -o "$1" = "--help" ] && { Usage ; exit 0; }
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[ $# -ge 3 ] || { Usage 1>&2; exit 1; }
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freq=$1
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name=$2
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shift 2;
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[ "${name#*/}" = "${name}" ] || fail "name cannot contain a /"
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[ "$(id -u)" = "0" ] || fail "must be root"
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case "$freq" in
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once|always) sem="${DATA_PRE}.$name.$freq";;
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instance) sem="${INST_PRE}.$name.$freq";;
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*) Usage 1>&2; fail "invalid frequency: $freq";;
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esac
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[ -d "${sem%/*}" ] || mkdir -p "${sem%/*}" ||
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fail "failed to make directory for ${sem}"
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[ "$freq" != "always" -a -e "$sem" ] && exit 0
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"$@"
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ret=$?
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printf "%s\t%s\n" "$ret" "$(date +%s)" > "$sem" ||
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fail "failed to write to $sem"
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exit $ret
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