If you want to know about a bash status of last command, read this article. Here you will also find out how to get the exit code of a command and how to use it.
if [ $? -eq 0 ]; then: Checks the exit status of the previous command. If it's 0 (indicating success), print a success message. Otherwise, it prints a failure message. 9. Write a Bash script that performs a simple arithmetic operation using user input. Code: #!/bin/bash # Ask t...
Let's see what the exit status was. $echo$?1 If we don't set an exit status explicitly, it's assumed to be0or it's the results of the last command that was run. Let's go in here. Let's see how exit statuses work with functions. I am going to create anokfunction. Instead o...
Captures the exit status code of the previously executed command. $? is a special variable that holds the exit status of the last executed command. Stores the exit status in the variable 'exit_status'. Print the exit status code: echo "Exit status code: $exit_status" Prints the exit stat...
exit[n] Bash Copy Here,[n]represents an exit status that the script returns to the shell or parent script. This is an optional parameter. If not provided, the exit command will return the status of the last command executed. Let’s look at a simple example: ...
Another handy command we can use when writing a script is exit. This command is used to terminate the current execution and deliver an exit code to the shell. Running an exit code without any arguments, will terminate the running script and return the exit code of the last command executed...
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. You might also receive a shell error message from Bash further describing the error, but the exit ...
exit is a builtin command and cause the shell to exit with a given exit status. n is the exit status of n. If n is omitted,the exit status is that of the last command executed. A function can be called on a EXIT before the shell terminates.
set -o errtrace # trace ERR through 'time command' and other functions function error() { JOB="$0" # job name LASTLINE="$1" # line of error occurrence LASTERR="$2" # error code echo"ERROR in ${JOB} : line ${LASTLINE} with exit code ${LASTERR}" exit 1 } trap 'error ${LINE...
You can then call the function and pass it the name of a file to delete: del_file test.txt ✕Remove Ads When you call a function, it will set the special$?value with the exit status of the last command it runs. The exit status is useful for error checking; in this example, you...