function::exit - Linux
Overview
The function::exit
command in Linux provides a controlled method to exit a function defined in a script. It allows for graceful handling of errors or unexpected behavior by prematurely terminating the function’s execution.
Syntax
function::exit [EXIT_CODE]
Parameters:
- EXIT_CODE (Optional): Integer exit code to return upon exiting the function. Defaults to 0 if omitted.
Options/Flags
None
Examples
Example 1: Exit with a custom exit code:
function my_function() {
echo "Performing some task"
if [ $? -ne 0 ]; then
function::exit 1
fi
echo "Task completed successfully"
}
my_function
Example 2: Exit with default exit code (0):
function my_function() {
echo "Performing another task"
function::exit
}
my_function
Common Issues
Error: function::exit: command not found
- Solution: Ensure that the script containing the function definition is sourced or executed using the
source
or.
commands.
Error: function::exit: not within a function
- Solution: The
function::exit
command can only be used within a function definition.
Integration
function::exit
can be used in conjunction with other commands or tools to handle errors and exceptions in scripts:
- Combine with
if
statements: Exit a function with an error code based on the result of anif
statement condition. - Use in error handling routines: Define a function as an error handler and use
function::exit
to terminate the script with an appropriate exit code. - Integrate with logging tools: Use
function::exit
to terminate a function and write an error message to a log file before exiting the script.
Related Commands
exit
: Exits the entire script with a specified exit code.return
: Exits the current function without terminating the script.