UpdateController/log_helpers.sh

#!/bin/bash
# set -x 

readonly DEBUG=0
readonly INFO=1
readonly WARN=2
readonly CRIT=3
readonly FATAL=4
readonly MAX_DEBUG_LEVEL=5

log_level=0

set_dbg_level () {
    if [ $1 < $MAX_DEBUG_LEVEL ]; then
        log_level=$1
    fi
}

dbg_level () {
    return $log_level
}

log() {
    local log_file=/var/log/update_controller.log
    if [ -f "$log_file" ]; then
        touch $log_file
    fi

    if [[ "$(wc -l < $log_file)" > "100000" ]]; then
        # remove first line
        sed -e 1d -i $log_file
    fi
    local msg="$(date +'%Y-%m-%d_%T'): $*"
    printf "$msg\n" >&2
    printf "$msg\n" >> $log_file
}

log_debug() {
    if [ $log_level = $DEBUG ]; then
        log "DEBUG $*"
    fi
}

log_info() {
    if [ $log_level -le $INFO ]; then
        log "INFO  $*"
    fi
}

log_warn() {
    if [ $log_level -le $WARN ]; then
        log "WARN  $*"
    fi
}

log_crit() {
    if [ $log_level -le $CRIT ]; then
        log "CRIT  $*"
    fi
}

log_fatal() {
    if [ $log_level -le $FATAL ]; then
        log "FATAL  $*"
        log "exiting ..."
        exit 1
    fi
}

# log "test message1" "test message2"