Exiting With Error
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Bash Error Message
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Bash Print Error Message
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Bash Get Error Message
down vote favorite 1 Is it possible to exit on error, with a message, without using if statements? [[ $TRESHOLD =~ ^[0-9]+$ ]] || exit ERRCODE "Threshold must be an integer value!" Of course the right side of || won't work, just to give you better idea of what I am trying to accomplish. Actually, I don't even mind with which ERR code it's gonna exit, just to show exit with message bash the message. EDIT I know this will work, but how to suppress numeric arg required showing after my custom message? [[ $TRESHOLD =~ ^[0-9]+$ ]] || exit "Threshold must be an integer value!" bash message exit share|improve this question edited Jul 6 '14 at 16:23 asked Jul 6 '14 at 16:15 branquito 9011027 add a comment| 2 Answers 2 active oldest votes up vote 13 down vote accepted exit doesn't take more than one argument. To print any message like you want, you can use echo and then exit. [[ $TRESHOLD =~ ^[0-9]+$ ]] || \ { echo "Threshold must be an integer value!"; exit $ERRCODE; } share|improve this answer answered Jul 6 '14 at 16:22 P.P. 58.3k768119 The trick was using {. Great. –branquito Jul 6 '14 at 16:27 Can you explain from where it was comming the message numeric argument required, and why I couldn't disable it with 2>/dev/null? –branquito Jul 6 '14 at 16:28 Likely that TRESHOLD is empty. echo goes to stdout. So redirecting 2 will not work. You can print to stderr: [[ $TRESHOLD =~ ^[0-9]+$ ]] || { echo 1>&2 "Threshold must be an integer value!"; exit $ERRCODE; } –P.P. J
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with PhantomJS by Aries Beltran Published by Packt Publishing Getting Started with PhantomJS Table of Contents Getting Started with PhantomJS Credits About the Author About the Reviewers www.PacktPub.com Support files, https://www.safaribooksonline.com/library/view/getting-started-with/9781782164227/ch04s04.html eBooks, discount offers and more Why Subscribe? Free Access for Packt account holders Preface What this book covers What you need for this book Who this book is for Conventions Reader https://github.com/docker/docker/issues/1875 feedback Customer support 1. Getting Started Downloading PhantomJS Building PhantomJS from source Working with PhantomJS PhantomJS JavaScript API The phantom object The command-line arguments Writing PhantomJS scripts Summary 2. Manipulating Page Content error message Opening a web page Playing with DOM elements Simulating mouse clicks Working with form fields Summary 3. Handling Events and Callbacks Listening to page events Capturing alert messages Answering prompt messages Responding to confirm pop ups - OK or Cancel Performing user events Summary 4. Capturing Errors Handling PhantomJS errors Capturing page script errors Anticipating the page loading error Exiting with error codes Summary exiting with error 5. Grabbing Pages Undocumented supported image format Screenshot dimensions Saving web pages as PDFs Summary 6. Accessing Location-based Services Checking a location based on IP address Getting driving directions Looking up for pizza delivery establishments Summary 7. Working with Files PhantomJS FileSystem API Reading files Writing files Character encoding Summary 8. Cookies Reading cookies Baking some cookies Deleting cookies Keeping cookies Summary 9. External JavaScript Modules Using the object-oriented modules Using third-party JavaScript libraries Summary 10. Testing with PhantomJS What is unit testing? Unit testing with Jasmine Summary 11. Maximizing PhantomJS CasperJS GhostDriver Screenshots, web metrics, and more Summary Index Exiting with error codesIn most cases, if we've encountered an error, we normally stop further execution of the script. It is logical to do that in most scenarios. For example, if we have a problem loading the required URL or file, we halt the process since we reference DOM objects within the page after loading; we cannot do so if the page is not available.The PhantomJS exit function can accept a numeric value that will be used as the error code; it is used by calling the shell script.e
Sign in Pricing Blog Support Search GitHub This repository Watch 2,917 Star 35,915 Fork 10,564 docker/docker Code Issues 1,806 Pull requests 146 Projects 0 Wiki Pulse Graphs New issue Exit with error codes when a docker command fails #1875 Closed larryweya opened this Issue Sep 13, 2013 · 16 comments Projects None yet Labels None yet Milestone 0.7.0 Assignees No one assigned 8 participants larryweya commented Sep 13, 2013 I'm writing some shell scripts to help my web container find other containers it depends on. I'm doing this by first storing the cidfile when e.g. the db container starts then later when the web container starts it looks up the IP address using the cidfile. My issue is that whenever a docker command fails e.g. when the container id isnt valid for an inspect command, docker doesn't set an error code. It would be helpful if docker commands set an error code when they fail. creack commented Sep 16, 2013 This is already the case: $> docker start invalidid && echo ok || echo ko ko $> docker run nonExistingImage && echo ok || echo ko ko $> docker run existingimageWithoutCommand && echo ok || echo ko ko $> docker run base false && echo ok || echo ko ko $> docker run base true && echo ok || echo ko ok larryweya commented Sep 17, 2013 @creack I'm running docker 0.6.1 from the "deb https://get.docker.io/ubuntu docker main" repo Client version: 0.6.1 Server version: 0.6.1 Git commit: 5105263 Go version: go1.1.2 Last stable version: 0.6.1 and this is what I get as ouput to the same command ubuntu@docker:~$ docker start invalidid && echo ok || echo ko Error: No such container: invalidid ok Checking the last error with $? gives me a zero ubuntu@docker:~$ echo $? 0 creack commented Sep 17, 2013 Indeed, my bad, PATH fail.. It is only in master. It will be release with the 0.6.2 scheduled today :) Docker member tianon commented Sep 19, 2013 Did 0.6.2 fix this issue for you, @larryweya? jamescarr commented Sep 19, 2013 I am on 0.6.2 and still have a problem with improper exit codes being returned. I'll close #1935 as it is a dupe of this one (I failed to search first). jamescarr referenced this issue Sep 19, 2013 Closed `docker build` has zero exit code on failure #1935 larryweya commented Sep 20, 2013 @creack @jamescarr @tianon Just upgraded to 0.6.2 and it seems like its fixed for some commands, Ill break it down as I've seen it Commands that still return zero on error docker stop docker rm docker