UpdateController/log_helpers

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#!/bin/bash
# set -x
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if [ "${log_helpers_sourced:-1}" = "1" ]; then # include only once
readonly log_helpers_sourced=${BASH_SOURCE[0]}
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readonly log_file=/var/log/update_controller.log
if ! [ -f "$log_file" ]; then
touch $log_file
fi
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readonly DEBUG=0
readonly INFO=1
readonly WARN=2
readonly CRIT=3
readonly ERROR=4
readonly FATAL=5
readonly MAX_DEBUG_LEVEL=6
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log_level=0
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set_dbg_level () {
if [ $1 < $MAX_DEBUG_LEVEL ]; then
log_level=$1
fi
}
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dbg_level () {
return $log_level
}
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log() {
if [[ $(("$(wc -l < $log_file)")) -ge $((100000)) ]]; then
# remove first line
sed -e 1d -i $log_file
fi
local msg="$(date +'%Y-%m-%d_%T'): $*"
printf "log:$msg\n" >&2
printf "$msg\n" >> $log_file
}
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log_debug() {
if [ $log_level = $DEBUG ]; then
log "DEBUG $*"
fi
}
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log_info() {
if [ $log_level -le $INFO ]; then
log "INFO $*"
fi
}
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log_warn() {
if [ $log_level -le $WARN ]; then
log "WARN $*"
fi
}
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log_crit() {
if [ $log_level -le $CRIT ]; then
log "CRIT $*"
fi
}
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log_error() {
if [ $log_level -le $ERROR ]; then
log "ERROR $*"
fi
}
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log_fatal() {
if [ $log_level -le $FATAL ]; then
log "FATAL $*"
log "exiting ..."
exit 1
fi
}
###############################################################################
fi ### include guard