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Bash Script Return Error


Exiting..." >&2 exit 1 } trap 'abort' 0 set -e # Add your script below.... # If an error occurs, the abort() function will be called. #---------------------------------------------------------- # ===> Your script share|improve this answer answered Dec 7 '10 at 21:14 DGH 4,89611423 9 In unix, success is always 0. fi fi zypper help > /dev/null 2>&1 if [ $? -eq 0 ] ; then sudo zypper --non-interactive --no-gpg-checks --quiet install --auto-agree-with-licenses "[email protected]" return $? An AND list has the form command1 && command2 command2 is executed if, and only if, command1 returns an exit status of zero. http://sovidi.com/bash-script/bash-script-return-error-message.php

on the next line of your example after sudo apt-get ... Especially if that script is used for the command line. I'm not knowledgeable enough in bash to tell exactly what class of syntax errors (if only they can be classified) might lead to an immediate abortion of the script or not. How to handle spending money for extended trip to Europe?

Bash Script Return Error Message

so you want: if [ ${#a[*]} -eq 2 ]; then share|improve this answer edited Jul 8 '13 at 19:16 Evan Teitelman 13.1k43758 answered Jul 8 '13 at 17:18 higuita 47237 This will save more typing and promote laziness. # An error exit function function error_exit { echo "$1" 1>&2 exit 1 } # Using error_exit if cd $some_directory; then rm * If you would like this to fail, then you can use set -o pipefail to make it fail.

TERM Terminate - this signal is sent when someone sends the TERM signal using the kill command. exit

The equivalent of a bare exit is exit $? or even just omitting the exit.

#!/bin/bash COMMAND_1 . . . Linux is a registered trademark of Linus Torvalds. Bash Script Return Exit Code You can also reset traps back to their default by using - as the command.   Signal Description INT Interrupt - This signal is sent when someone kills the script by pressing ctrl-c.

My girlfriend has mentioned disowning her 14 y/o transgender daughter more hot questions question feed default about us tour help blog chat data legal privacy policy work here advertising info mobile Exit Bash Script Early Skeletal formula for carbon with two double bonds How to handle spending money for extended trip to Europe? Meaning of Guns and ghee Rosa Parks is a [symbol?] for the civil rights movement? An OR list has the form command1 || command2 command2 is executed if, and only if, command1 returns a non-zero exit status.

share|improve this answer answered Jul 7 '13 at 19:34 MountainX 2,583134477 The cmd; if [ $? -eq 0 ]; then ... Bash Script Return Value From Command I want to store the error message inside a string and append it in a text file. add_to_passwd $user cp -a /etc/skel /home/$user chown $user /home/$user -R There could be problems if you ran out of diskspace or someone killed the process. Checking the exit status There are several ways you can get and respond to the exit status of a program.

Exit Bash Script Early

I've appended echo 'Bad2: has not aborted the execution after bad main!' as the last to your example, and the output is: $ LC_ALL=C ./sh-on-syntax-err ./sh-on-syntax-err: line 6: #: syntax error: This site is not affiliated with Linus Torvalds or The Open Group in any way. Bash Script Return Error Message This variable will print the exit code of the last run command. Bash Script Return Value In this case, the last run command is the echo command, which did execute successfully.

This doesn't let you write your own message, but often the failing command's own messages are enough. his comment is here Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the Not the intended behavior! Any script that is useful in some fashion will inevitably be either used in another script, or wrapped with a bash one liner. Bash Script Carriage Return

I pasted my complete function as I realized that my simplified example wasn't enough. I guess adding return $? In general, it is considered bad practice to use set -e, because all errors (i.e., all non-zero returns from commands) should be smartly handled by the script (think robust script, not this contact form below the cmake call to exit the function with the same exit code as cmake, and add return 1 below the echo call to exit with 1, which is non-zero and

Written by Benjamin Cane on 2014-09-02 14:45:00| 4 min read Sponsored by Lately I've been working on a lot of automation and monitoring projects, a big part of these projects are Bash Script Return True The way you have written it (and the way I have written my example) if the apt fails, then its exit status is returned and the function exits, returning the exit The two lines change the working directory to the name contained in $some_directory and delete the files in that directory.

Anywhere else should abort the script. –jordanm Jul 8 '13 at 16:09 @jordanm Ok, this can be an explanation why set -e hasn't worked.

Can Customs make me go back to return my electronic equipment or is it a scam? Related 14How to call bash functions5Get canonical value of relative path from bash script3how to keep line feed in result returned by bash command2Bash script to run a clamscan on Ubuntu- Probably returning some kind of non-zero value should work. Bash Script Return From Function up vote 5 down vote favorite 1 I was tasked to create an automated server hardening script and one thing that they need is a report of all the output of

Script: #!/bin/bash touch /root/test 2> /dev/null if [ $? -eq 0 ] then echo "Successfully created file" else echo "Could not create file" >&2 fi In the above revision of our The problem with the script was that it did not check the exit status of the cd command before proceeding with the rm command. To make it more robust, use this: #!/usr/bin/env bash install_auto() { apt-get -h > /dev/null 2>&1 ret=$? http://sovidi.com/bash-script/bash-script-bus-error.php While this is a working solution to the problem, there are more clever methods that will save us some typing.

environment variable contains the exit status of the previous program. else sudo apt-get install --assume-yes "[email protected]" return $? UNIX is a registered trademark of The Open Group. more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed

Let's say I ran this command: /sbin/modprobe -n -v hfsplus The output of running this in my machine would be: FATAL: Module hfsplus not found How can I store that error On Unix and Linux systems, programs can pass a value to their parent process while terminating. Not the answer you're looking for? If the exit code is anything other than 0 this indicates failure and the script will echo a failure message to stderr.