How do I find my bash return code?
To check the exit code we can simply print the $? special variable in bash. This variable will print the exit code of the last run command.
Can bash functions return values?
Unlike functions in “real” programming languages, Bash functions don’t allow you to return a value when called. When a bash function completes, its return value is the status of the last statement executed in the function, 0 for success and non-zero decimal number in the 1 – 255 range for failure.
What is the command to check exit code?
Extracting the elusive exit code To display the exit code for the last command you ran on the command line, use the following command: $ echo $? The displayed response contains no pomp or circumstance. It’s simply a number.
What is a return code in Linux?
What is an exit code in the UNIX or Linux shell? An exit code, or sometimes known as a return code, is the code returned to a parent process by an executable. On POSIX systems the standard exit code is 0 for success and any number from 1 to 255 for anything else.
Which command shows the return code of the last executed command?
echo $? 2. It returns the exit status of the last executed command.
How do I return a value from a shell script?
Here are the different ways to return value in shell script function.
- Using Echo. You can echo string at the end of your Shell script function.
- Return Exit Status. You may also return an exist status at the end of your shell script function as shown below.
- Using Shared Variable.
How do I get exit status in shell?
You can simply do a echo $? after executing the command/bash which will output the exit code of the program. Every command returns an exit status (sometimes referred to as a return status or exit code).
Which command returns the exit status of last command?
What is $? In bash?
$? is a special variable in bash that always holds the return/exit code of the last executed command. You can view it in a terminal by running echo $? . Return codes are in the range [0; 255]. A return code of 0 usually means everything is ok.