function::error - Linux
Overview
function::error
is a command used to check for errors in a function and display a user-friendly and customized error message. It provides a structured and consistent way of handling errors in scripts and functions, enhancing readability and debugging.
Syntax
function::error [OPTIONS] [CODE] [MESSAGE]
Options/Flags
-h
,--help
: Display usage information.-v
,--verbose
: Enable verbose output, showing additional details about the error.-s
,--silent
: Suppress output, only set the error code.--code
: Specify a custom error code. (Default: 1)
Examples
Simple Usage:
function::error "Invalid input provided."
Custom Error Code:
function::error --code 404 "Page not found."
Verbose Output:
function::error -v "Failed to connect to database."
Common Issues
- Incorrect Syntax: Ensure proper syntax and argument order.
- Non-Zero Return Code: The
function::error
command sets a non-zero return code when an error is encountered. - Empty Error Message: A message argument should be provided to display an error message.
Integration
function::error
can be integrated into shell scripts or function libraries to handle errors uniformly. For instance, the following script uses function::error
to provide error handling for a data processing function:
#!/bin/bash
process_data() {
if [ ! -f "$1" ]; then
function::error "File not found: $1"
return 1
fi
# Data processing logic here
}
process_data data.txt
Related Commands
echo
: Display messages on the console.exit
: Exit the current script with a specified return code.