Shell script Returning a value from a bash function Unix Linux
11 I have a function which returns 1 if the number is a valid ten digit number valNum flag 1 if 1 1 9 0 9 0 9 0 9 0 9 0 9 0 9 0 9 0 9 0 9 then echo Invalid Number flag 0 fi return flag It is getting called by if valNum num eq 1 then do something fi
Returning Values from Bash Functions Linux Journal, The simplest way to return a value from a bash function is to just set a global variable to the result Since all variables in bash are global by default this is easy function myfunc myresult some value myfunc echo myresult The code above sets the global variable myresult to the function result
Bash Functions Linuxize
The purpose of a function is to help you make your bash scripts more readable and to avoid writing the same code repeatedly Compared to most programming languages Bash functions are somewhat limited In this tutorial we will cover the basics of Bash functions and show you how to use them in your shell scripts Defining Bash Functions
Bash Function Return Value LinuxOPsys, Let s understand return values from the bash function with examples Returning a status code Although there exists a return statement it can only be used to explicitly set the exit status code of a function If a return statement is not specified in a Bash function the exit status code is set equal to the status code of the last command
Bash Function How to Use It Variables Arguments Return phoenixNAP
Bash Function How to Use It Variables Arguments Return phoenixNAP, The bash function is like a script within a script Using functions in bash scripting comes with two benefits 1 A function is read directly into the shell s memory and stored for later use Since computer memory is not an issue nowadays using functions is faster than repeating code 2
Bash Function How To Use It Variables Arguments Return
How to access the last return value in bash Ask Ubuntu
How to access the last return value in bash Ask Ubuntu To elaborate the return value is always a number Usually 0 means success and non zero means some kind of failure The string or text that the command spits out is referred to as its output not its return value
Bash Function Return Value
12 Answers Sorted by 163 You can set an arbitrary exit code by executing exit with an argument in a subshell exit 42 echo 42 So you could do exit 1 or some other value 0 or use false as others have suggested while do do something until it returns 0 done Or you can emulate a do while loop How do I set or the return code in Bash Stack Overflow. 3 Answers Sorted by 16 Well depending on what you wish there are several solutions Print the message to stderr and the value you wish to take in stdout function fun1 Print the message to stderr echo Start function 2 Print the return value to stdout echo 2 fun1 will print the message to stderr but fun1 will The Advanced Bash Scripting Guide offers some guidelines about exit code values Test the return code with a shell script If you need to test the return code of a command you invoked on your shell script you just need to test the variable immediately after the command executes bin bash A snipet from a shell script Next we will
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