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Shell Script Exit Code


You usually want something like if ls -al file.ext; then : nothing; else exit $?; fi which of course like @MarcH says is equivalent to ls -al file.ext || exit $? Not the answer you're looking for? Browse other questions tagged process unix or ask your own question. Hot Network Questions How much leverage do commerial pilots have on cruise speed? Check This Out

Is the computer cheating at Dice Poker? Browse other questions tagged database sql postgresql psql or ask your own question. Return Code Conventions By convention, command line execution should return zero when execution succeeds and non-zero when execution fails. but if the then or else clauses are somewhat more complex, it is more maintainable. –tripleee Aug 23 '12 at 7:14 7 [[ $rc != 0 ]] will give you

Shell Script Exit Code

In it, you'll get: The week's top questions and answers Important community announcements Questions that need answers see an example newsletter By subscribing, you agree to the privacy policy and terms it couldn't be found). See also $PIPESTATUS and the EXIT STATUS section of the bash man page: For the shell’s purposes, a command which exits with a zero exit status has succeeded. Note that it will be trimmed to an 8bit unsigned integer (0...255) by (RETURNCODE mod 256) You can check the return code of the last shell command inside the terminal(!) with

Assign $? Shutting down the Pi safely without SSH or a monitor? variable so you would have something like: ls -al file.ext rc=$?; if [[ $rc != 0 ]]; then exit $rc; fi You need to be careful of piped commands since the Exit Code Python Endianness conversion in C What's the English word for something that given attention too much to more hot questions question feed about us tour help blog chat data legal privacy policy

I suggest discussing the issue in our Windows XP public newsgroup. Bash Script Exit On Error Thanks. Also rc=$? For example, to determine whether a particular regular expression regex was present somewhere in a file options, we might apply grep(1) with its POSIX -q option to suppress output and just

Error talking to repository: fatal: Unable to find remote helper for 'http' Connection failed. Exit Bash Shell This return code tells me that both errors were raised. Make an interweaving quine Could human beings evolve to have longer gestation periods? share|improve this answer edited Aug 25 at 9:56 answered Jul 23 '13 at 21:34 okigan 67611025 add a comment| up vote 6 down vote It has no special meaning, other than

Bash Script Exit On Error

Correcting the line endings to unix format solved the problem –Mitkins Sep 30 '14 at 1:35 | show 2 more comments up vote 14 down vote Generally it means: 127 - asked 8 years ago viewed 258662 times active 11 months ago Visit Chat Linked 2 Linux - Capture exit code of a ruby script 19 NodeJS Managed Hostings vs VPS 16 Shell Script Exit Code nothing is found. Bash Set Exit Code there are dark corners in the Bourne shell, and people use all of them.

--Chet Ramey

The exit command terminates a script,

Confusion in fraction notation How can I convince players not to offload a seemingly useless weapon? his comment is here return non-zero if an error occurs while executing a file). It's unfortunately not immediately deducible though, if the process exited with status 127, or if it couldn't found. We also pass a specific non-zero return code from the failed command to inform the caller of our script about the failure. Exit Command In Unix Shell Script

Not the answer you're looking for? COMMAND_LAST # Will exit with status of last command. For example, if we were using the --max-delete option for rsync(1), we could check a call's return value to see whether rsync(1) hit the threshold for deleted file count and write this contact form Negating a condition using !

true # The "true" builtin.

Not the answer you're looking for? Exit Code 0 You can use special shell variable called? Basis that generates a topology for a connected topological space Personal loan to renovate my mother's home Why do XSS strings often start with ">?

Here is the bash manual section on the set builtin.

directly. EDIT: Not immediately deducible, except for the output on the console, but this is stack overflow, so I assume you're doing this in a script. Jumping to EOF in this way will exit your current script with the return code of 1. Unix "echo -e" up vote 2 down vote favorite I have a framework written in python, and for testing purposes I basically want to do a subprocess (aka shell call) ...

with bash: The exit codes are provided in the PIPESTATUS special array. could then be removed and just used [ $? -ne 0 ]. –curtlee2002 May 21 '13 at 15:15 | show 2 more comments up vote 159 down vote If you want See questions about this article Powered by Confluence and Scroll Viewport Atlassian Support Ask the community Provide product feedback Contact technical support Atlassian Privacy Policy Terms of use Security Copyright © navigate here Generic immutable object builder Is it possible to get a professor position without having had any fellowships in grad school?

Why call it a "major" revision if the suggested changes are seemingly minor? You can combine the grep and if command in a single statement as follows: if grep "^$username:" /etc/passwd >/dev/null then echo "User '$username' found in $PASSWD_FILE file." else echo "User '$username'