function::log - Linux
Overview
function::log provides a concise and standardized syntax for logging messages from scripts, applications, or the command line. It offers customizable logging levels, automatic timestamps, and a consistent format, simplifying log management and analysis.
Syntax
function::log <LEVEL> <MESSAGE> [DATA]
Required Arguments
-
LEVEL: The logging level, case-insensitive, can be:
- debug: Minimal impact, verbose details for debugging
- info: Informational messages, generally useful for day-to-day operations
- error: Error conditions, generally indicating problems that require attention
- fatal: Critical failures or unrecoverable errors
-
MESSAGE: The log message to be recorded.
Optional Arguments
- DATA: Additional data to include in the log message. This can be any string or complex data structure.
Options/Flags
None.
Examples
# Log a debug message
function::log debug "Starting script execution"
# Log an info message with additional data
function::log info "User logged in" "username=example"
# Log an error message
function::log error "Database connection failed"
Common Issues
- No output: Ensure the specified LEVEL is among the supported values.
- Incorrect format: Always use the specified syntax, with LEVEL, MESSAGE, and optional DATA in the correct order.
Integration
function::log can be integrated with other commands and tools as follows:
# Pipe log messages to a file
function::log info "Message to log" | tee -a log.txt
# Capture log messages to a variable
log_output=$(function::log debug "Command output")
Related Commands
logger
: Traditional logging utilitysyslog-ng
: Advanced logging and monitoring tool