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1. Top results related to what does a 0 exit status mean?

   • What does ": exit 0" mean in a bash script?

     Top Answer

     Answered Dec 12, 2019 · 3 votes

     The bash builtin : is basically a command that returns zero (success) after all its arguments are expanded by the shell(a). In this case, the expansion doesn't really do anything so it's effectively a null operation. I suspect it's there just to indicate the effect of the :(b).

     And the effect of that : has to do with what bash scripts return. They basically return the exit status of the last command that was run in the script. The : will therefore force the exit status of the script as a whole to be zero regardless of what the command before it returned.

     You can see the effect with the following script:

     ls /tmp/nosuchfile 2> /dev/null-

     If you run that followed by echo $?, you'll see an error code:

     pax> ./script.sh ; echo $?2-

     If you then change the script to:

     ls /tmp/nosuchfile 2> /dev/null: some arbitrary text-

     then you will see a success code from the script:

     pax> ./script.sh ; echo $?0-

     (a) I often use it for infinite loops, such as:

     while : ; do somePeriodicThing ; sleep 60 ; done-

     (b) Of course, it's not quite the same as exit 0 since the exit will exit your current shell which will act differently depending on whether you ran it or sourced it:

     ./script.sh # runs it, exit will exit that script.. ./script.sh # sources it, exit will exit your shell.-

     The : will not exit your current shell in either of those two cases.

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   • What does exit status 205 mean?

     Top Answer

     Answered Sep 04, 2015 · 4 votes

     Read the documentation of the particular software giving that 205 exit(2) code. There are no universal conventions about it (except EXIT_SUCCESS being 0, and EXIT_FAILURE being 1).

     FreeBSD has sysexits.h, but 205 is not listed there.

     It looks like some execve(2) failed with EACCESS or ENOEXEC errno. You might use strace(1) to investigate. Look also in log files (probably recently modified files under /var/log/).

     Be sure that the script (or executable file) you are executing is indeed executable. Try to chmod u+rx it (see chmod(1)).

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     2/5

   • Exit status 11: What does it mean?

     Top Answer

     Answered Mar 14, 2011 · 1 votes

     I finally thought to check Apache's error.log, and the 11 status was accompanied by this: PHP Warning: Module 'imagick' already loaded in Unknown on line 0

     I found the solution here: http://www.somacon.com/p520.php Apparently I accidentally put an extra << extension="imagick.so" >> line in php.ini. Removing it allowed the CLI script to return status 0.

     Note: After I posted this, I started getting a PHP-Warning from imagick about no permissions to create the ~/.gnome2 directory, and the 11 status. So seeing the 0 status after applying this fix may have been a fluke.

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     3/5

   • What does process exit status 3 mean?

     Top Answer

     Answered Oct 22, 2010 · 11 votes

     At least in the old days, a return value of 1 generally meant a hard error and value 2 was usually reserved for problems with the command line arguments — it meant that the user had made an error, not the program. But beyond that: no, no convention; and even that slight convention was not universal. Like dashes in front of command-line arguments, which some versions of ps(1) let you omit, return codes were just convention. In general, read the docs (or the source!) to the script you're running and you then have to write error-code checking code to its specific meanings.

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     4/5

   • What does it mean exit (0) and exit (1)?

     Top Answer

     Answered Jun 27, 2019 · 1 votes

     exit(0) means a clean exit without an error

     exit(1) means there was an error and that is the reason for the exit

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     5/5

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2. stackoverflow.com › questions › 9944785What is the difference between exit(0) and exit(1) in C?

   stackoverflow.com › questions › 9944785

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   Mar 30, 2012 · exit in the C language takes an integer representing an exit status. Exit Success. Typically, an exit status of 0 is considered a success, or an intentional exit caused by the program's successful execution. Exit Failure. An exit status of 1 is considered a failure, and most commonly means that the program had to exit for some reason, and was ...

   • What is the difference between exit(0) and exit(1) in C language? exit(0) indicates successful program termination & it is fully portable, While....
   • exit(0) indicates that the program terminated without errors. exit(1) indicates that there were an error. You can use different values other than...
   • The difference is the value returned to the environment is 0 in the former case and 1 in the latter case: $ ./prog_with_exit_0 $ echo $? 0 $. and...
   • exit is a system call used to finish a running process from which it is called. The parameter to exit is used to inform the parent process about th...
   • When the executable ends (exits) it returns a value to the shell that ran it. exit(0) usually indicates that all is well, whilst exit(1) indicates...
   • exit() should always be called with an integer value and non-zero values are used as error codes. See also: Use of exit() function.
   • exit(0) means Program(Process) terminate normally successfully.. exit(1) means program(process) terminate normally unsuccessfully.. If you want t...
   • exit(0) behave like return 0 in main() function, exit(1) behave like return 1. The standard is, that main function return 0, if program ended succe...
   • exit(0) is equivalent to exit(EXIT_SUCCESS). exit(1) is equivalent to exit(EXIT_FAILURE). On failure normally any positive value get returned to...

3. www.geeksforgeeks.org › exit0-vs-exit1-in-c-c-withexit(0) vs exit(1) in C/C++ with Examples - GeeksforGeeks

   www.geeksforgeeks.org › exit0-vs-exit1-in-c-c-with

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   Jan 16, 2020 · In this article, the topic is to understand the difference between exit() and break. exit(): When a user wants to exit a program from this function is used.It is a void return type function that calls all functions registered at the exit and terminates the program.File buffers are flushed, streams are closed, and temporary files are deleted and hen

4. stackoverflow.com › questions › 1101957error handling - Are there any standard exit status codes in ...

   stackoverflow.com › questions › 1101957

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   Jul 9, 2009 · Here is the real, long-standing exit status convention for normal termination, i.e. not by signal: Exit status 0: success; Exit status 1: "failure", as defined by the program; Exit status 2: command line usage error; For example, diff returns 0 if the files it compares are identical, and 1 if they differ.

   Code sample

   waitpid(child, &status, 0);

   if (WIFEXITED(status))

     printf("first child exited with %u\n", WEXITSTATUS(status));

   child = fork();

   if (child <= 0)...

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5. codefather.tech › blog › exit-bash-scriptExit a Bash Script: exit 0 and exit 1 Explained - Codefather

   codefather.tech › blog › exit-bash-script

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   • Exit A Bash Script with Error
   • What Are Exit 0 and Exit 1 in A Bash script?
   • More About The Status of The Bash Exit Command
   • An Example of Script Failure
   • Bash If Else Applied to $? Variable
   • Conclusion

   What can you do to write robust scripts that don’t break in unexpected ways in case of errors? The answer to this question is: don’t forget error handling. Instead of “hoping” that nothing will go wrong with your program, you can predict possible failures and decide how your program will react to those. How will you handle a failure if it occurs? W...

   See full list on codefather.tech

   How do you exit a Bash script on error? The standard convention is the following: As you can see from the table above, failures can be represented with any non-zero exit codes. For instance: 1. 1 may be used if incorrect arguments are passed to the script 2. 2 if the script cannot find a file it needs 3. 3 if the file it needs has an incorrect form...

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   I will show you an example of how the exit code is applied to the execution of any commands. This is really important in your Bash knowledge and I want to make sure it’s clear to you. Here is an example with the catcommand (this applies to all commands)… I open a shell on my computer and in the current directory I have the following files: If I use...

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   Now let’s modify the echo command in the simple script we have used before. We want to run it with an incorrect syntax and see if it exits with a non-zero exit code. Remove the double quotes at the end of the echo command as shown below: If we execute the script we see the message “syntax error: unexpected end of file“: And the exit code is 2. So a...

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   Let’s see how you can use a Bash if else statement together with the $? variable. The following script tries to create a subdirectory tmp/project in the current directory. In the condition of the if statement, we verify if the value of the variable $? is different than 0. If that’s the case we print an error message and exit the script with exit co...

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   We went through quite a lot! Now you know: 1. Why exit 0 and exit 1 are used in Bash scripts. 2. How you can use the variable $?to read the exit code returned by a command (or script) 3. The way to use a Bash if else statement together with the $? variable. And now it’s your turn… What kind of failures do you want to handle in your script? Let me k...

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6. linuxsimply.com › exit-codes › exit-0-and-1[Explained] What Are “exit 0” and “exit 1” in Bash? - LinuxSimply

   linuxsimply.com › exit-codes › exit-0-and-1

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   Mar 31, 2024 · What does the “exit 0” command do in Bash? The command exit 0 in bash is a useful tool that terminates the script with an exit status 0. This denotes that the Bash script executes successfully; not encountering any errors.

7. www.redhat.com › sysadmin › exit-codes-demystifiedBash command line exit codes demystified | Enable Sysadmin

   www.redhat.com › sysadmin › exit-codes-demystified

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   Feb 4, 2020 · Exit status 0. An exit status of 0 is the best possible scenario, generally speaking. It tells you that your latest command or script executed successfully. Success is relative because the exit code only informs you that the script or command executed fine, but the exit code doesn't tell you whether the information from it has any value.

8. People also ask

   What does exit status 0 mean?

   • An exit status of 0 is the best possible scenario, generally speaking. It tells you that your latest command or script executed successfully. Success is relative because the exit code only informs you that the script or command executed fine, but the exit code doesn't tell you whether the information from it has any value.

   Bash command line exit codes demystified | Enable Sysadmin

   www.redhat.com/sysadmin/exit-codes-demystified

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   What does Exit 0 mean in Bash?

   • It denotes that the command or steam of commands has been successfully executed, as defined in the Bash script. When the script executes without errors, it terminates successfully after getting the exit 0 command and returns the success code 0 to the calling process. Look at the example below to see how to use exit 0 in scripts:

   [Explained] What Are “exit 0” and “exit 1” in Bash? - LinuxSimply

   linuxsimply.com/bash-scripting-tutorial/process-and-signal-handling/exit-codes/exit-0-and-1/

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   What is the difference between Exit 0 and exit 1?

   • This exit code 0 means that the script has been executed successfully. On the other hand, exit 1 returns code 1 after script termination to denote failure. It signifies that the script has encountered an error condition. See the below example for a robust understanding that uses both exit 0 and exit 1 conditions:

   [Explained] What Are “exit 0” and “exit 1” in Bash? - LinuxSimply

   linuxsimply.com/bash-scripting-tutorial/process-and-signal-handling/exit-codes/exit-0-and-1/

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   What is the difference between Exit 0 and return 0?

   • On the other hand, the return 0 command is used within a function to exit the function with the status code 0. This, in turn, signifies the successful execution of that function. In summary, “exit 0” indicates successful script execution while return 0 signifies successful execution of a Bash function.

   [Explained] What Are “exit 0” and “exit 1” in Bash? - LinuxSimply

   linuxsimply.com/bash-scripting-tutorial/process-and-signal-handling/exit-codes/exit-0-and-1/

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9. en.wikipedia.org › wiki › Exit_statusExit status - Wikipedia

   en.wikipedia.org › wiki › Exit_status

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   Exit status. In computing, the exit status, or exit code, of a terminated process is an integer number that is made available to its parent process (or caller). In DOS, this may be referred to as an errorlevel . When computer programs are executed, the operating system creates an abstract entity called a process in which the book-keeping for ...