sh/bash/log.sh

LOG_LEVEL_FATAL=0
LOG_LEVEL_ERROR=1
LOG_LEVEL_WARN=2
LOG_LEVEL_INFO=3
LOG_LEVEL_DEBUG=4
LOG_LEVEL_TRACE=5

LOG_LEVEL=${LOG_LEVEL_WARN}

log_fatal() { [ "${LOG_LEVEL}" -ge "${LOG_LEVEL_FATAL}" ] && echo "${@}" ; }

log_error() { [ "${LOG_LEVEL}" -ge "${LOG_LEVEL_ERROR}" ] && echo "${@}" ; }

log_warn() { [ "${LOG_LEVEL}" -ge "${LOG_LEVEL_WARN}" ] && echo "${@}" ; }

log_info() { [ "${LOG_LEVEL}" -ge "${LOG_LEVEL_INFO}" ] && echo "${@}" ; }

log_debug() { [ "${LOG_LEVEL}" -ge "${LOG_LEVEL_DEBUG}" ] && echo "${@}" ; }

log_trace() { [ "${LOG_LEVEL}" -ge "${LOG_LEVEL_TRACE}" ] && echo "${@}" ; }