146 lines
4.0 KiB
Bash
146 lines
4.0 KiB
Bash
#!/bin/sh
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getTimeStamp() {
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(date -u +"%Y-%m-%dT%H:%M:%SZ")
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}
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getHostname() {
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(hostname -s)
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}
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lowercase() {
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echo "$1" | tr '[:upper:]' '[:lower:]'
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}
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uppercase() {
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echo "$1" | tr '[:lower:] [:upper:]'
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}
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# modified syslog fmt: <ISO-8601 timestamp> <hostname> <tag>[pid]: [LEVEL:$2] [STATUS:$3] <MESSAGE:$1> (<OPERATION:$4>:<CODE:$5>)
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writePlainTextLog() {
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# not enough information to generate a meaningful log message
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if [ -z "$1" ] || [ $# -lt 3 ]; then
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return
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fi
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printf "%s %s %s[%s]: [%s] [%s] %s (%s:%s)\n" \
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"$(getTimeStamp)" "$(getHostname)" "$LOG_PROGRAM_NAME" "$$" \
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"$2" "$(uppercase "$3")" "$1" "${4:UNSPECIFIED}" "${5:999}"
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}
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# $1: message, $2: level, $3: status, [$4: operation], [$5: code]
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writeJsonLog() {
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# not enough information to generate a meaningful log message
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if [ -z "$1" ] || [ $# -lt 3 ]; then
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return
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fi
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PROPS="$(
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jq --null-input \
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--arg timestamp "$(getTimeStamp)" \
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--arg hostname "$(getHostname)" \
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--arg pName "$LOG_PROGRAM_NAME" \
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--arg pid = "$$" \
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--arg level "$2" \
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--arg status "$(uppercase "$3")" \
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--arg message "$1" \
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--arg operation "${4:UNSPECIFIED}" \
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--arg code "${5:999}" \
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'{"level":$level, "programName":$pName, "status":$status, "operation":$operation, "code":$code, "message":$message}' \
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)"
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fi
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echo "$PROPS" | jq "."
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return
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}
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# $1: message, $2: level, $3: status, $4: operation, $5: code
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writeJournalLog() {
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# translate error levels
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if [ -z "$2" ]; then
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LOG_LEVEL=1
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else
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case "$2" in
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"emergency" | "emerg")
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LOG_LEVEL=7
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;;
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"alert")
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LOG_LEVEL=6
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;;
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"critical" | "crit")
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LOG_LEVEL=5
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;;
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"error" | "err")
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LOG_LEVEL=4
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;;
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"warning" | "warn")
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LOG_LEVEL=3
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;;
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"notice")
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LOG_LEVEL=2
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;;
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"info")
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LOG_LEVEL=1
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;;
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"debug")
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LOG_LEVEL=0
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;;
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esac
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fi
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# log the message
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if [ -z "$1" ]; then
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logger --journald <<end
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MESSAGE_ID="$(systemd-id128 new)"
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SYSLOG_TIMESTAMP="$(getTimeStamp)"
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SYSLOG_FACILITY=3
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SYSLOG_IDENTIFIER="${LOG_PROGRAM_NAME}"
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PRIORITY=4
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ERRNO="${LOG_DEFAULT_CODE}"
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OPERATION="${LOG_DEFAULT_OPERATION}"
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MESSAGE="${LOG_DEFAULT_MESSAGE}"
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STATUS="${LOG_DEFAULT_STATUS}"
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end
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else
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logger --journald <<end
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MESSAGE_ID="$(systemd-id128 new)"
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SYSLOG_TIMESTAMP="$(getTimeStamp)"
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SYSLOG_FACILITY=3
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SYSLOG_IDENTIFIER="${LOG_PROGRAM_NAME}"
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PRIORITY="${LOG_LEVEL}"
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ERRNO="${5:-$LOG_DEFAULT_CODE}"
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OPERATION="${4:-$LOG_DEFAULT_OPERATION}"
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MESSAGE="$1"
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STATUS="${3:-$LOG_DEFAULT_STATUS}"
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end
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fi
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return
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}
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LOG_PROGRAM_NAME="cfddns"
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LOG_DEFAULT_CODE=99
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LOG_DEFAULT_LEVEL="info"
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LOG_DEFAULT_MESSAGE="An unspecified error has occurred"
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LOG_DEFAULT_OPERATION="unspecified"
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LOG_DEFAULT_STATUS="ERR"
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if [ "$1" = "json" ]; then
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writeJsonLog # this will generate a generic error message
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writeJsonLog "This is a test message" # generate this message at the default level with the default code
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writeJsonLog "This is a test message" "warning" # generate this message at the 'warning' level with the default code
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writeJsonLog "This is a test message" "error" "testing" # generate this message at the 'error' level, part of a 'test' operation, and with the default code
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writeJsonLog "This is a test message" "alert" "testing" 10 # generate this message at the 'alert' level with all parameters set
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elif [ "$1" = "journal" ]; then
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writeJournalLog # this will generate a generic error message
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writeJournalLog "This is a test message" # generate this message at the default level with the default code
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writeJournalLog "This is a test message" "warning" # generate this message at the 'warning' level with the default code
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writeJournalLog "This is a test message" "error" "testing" # generate this message at the 'error' level as part of a 'test' operation, and with the default code
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writeJournalLog "This is a test message" "alert" "testing" 10 # generate this message at the 'alert' level with all parameters set
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else
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printf "\nPlease specify either 'json' or 'journal' after the script name. Exiting.\n\n"
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exit 1
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fi
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exit 0
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