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Here is the snippet: recover database using backup controlfile until cancel || true; auto I'm expecting this to eventually throw a "file not found" error. Besides, it's nice to have a place to modify to read "set -xe" when I want to turn on tracing for debugging. –Ville Laurikari May 4 '09 at 19:25 2 However, all entries in the filenamewithdomains should not start with a dot. How to deal with a really persuasive character? this contact form

How to book a flight if my passport doesn't state my gender? Intuition behind Harmonic Analysis in Analytic Number Theory Do COB LEDs usually need electrically insulating from the heatsink? Also, please note that I edited and commented on the question before I wrote my answer. –Oliver Salzburg♦ Aug 4 '12 at 16:39 add a comment| 2 Answers 2 active oldest In particular you should use quotes around variables.

Bash Script Ignore Error Continue

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 if [ $RESULT -eq 0 ]; then echo success else echo failed fi if [ $RESULT == 0 ]; then echo success 2 else echo failed 2 fi share|improve this answer linux bash error-handling share|improve this question edited Jul 2 '09 at 16:51 Jonathan Leffler 437k61507821 asked Jul 2 '09 at 15:31 JorgeO 67721022 5 Isn't that bash's default behavior? set +e invoke-rc.d tomcat stop set -e share|improve this answer edited Jul 2 '09 at 15:52 answered Jul 2 '09 at 15:43 xyzzy You should write a little explanation

share|improve this answer edited Nov 23 '13 at 0:28 answered Oct 16 '11 at 21:50 Keith Thompson 8,13232235 2 Note that the semicolon is important. –Thorbjørn Ravn Andersen Oct 17 Just do it like this: dosomething1 || exit 1 If you take Ville Laurikari's advice and use set -e then for some commands you may need to use this: dosomething || Intuition behind Harmonic Analysis in Analytic Number Theory Why don't most major game engines use gifs for animated textures? Bash Script Error Output bash ./child_1.sh echo "continuing to next step..." bash ./child_2.sh bash ./child_3.sh #...

I'm not sure what I got wrong here... To learn how to properly handle errors in a bash script, check out the following resources: Error handling in BASH Bash: Error handling share|improve this answer answered Aug 4 '12 at It's really annoying to have a script stubbornly continue when something fails in the middle and breaks assumptions for the rest of the script. I have the script currently set to globally stop on all errors.

Is it something like that? Bash Script Error Log When taking passengers, what should I do to prepare them? share|improve this answer edited Feb 25 '15 at 17:48 answered Feb 25 '15 at 17:43 John WH Smith 6,18212241 I added a debugging statement to print the value of This example uses if to check if a file exists and if it is a regular file.

Bash Script Continue After Reboot

The lockfile will be left there and your script won't run again until it's been deleted. Why are some programming languages Turing complete but lack some abilities of other languages? Bash Script Ignore Error Continue When taking passengers, what should I do to prepare them? Bash Script Error Command Not Found will prevent the shell from exiting no matter what.

share|improve this answer answered Sep 17 '13 at 6:36 German Rumm 21123 3 If you want to do something if it fails, and preserve the exit code (to show in http://waspsoft.com/bash-script/bash-script-bus-error.html more hot questions default about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation Science Other dosomething1 if [[ $? -ne 0 ]]; then exit 1 fi dosomething2 if [[ $? -ne 0 ]]; then exit 1 fi linux bash unix shell share|improve this question edited Sep I want the script to continue. –JorgeO Jul 2 '09 at 15:38 @Alex: it is default but there is probablt something that overrides the default setting. –Milan Babuškov Jul Bash Script Error Check

  1. You need to make sure that both the old and the new directories are moved to locations that are on the same partition so you can take advantage of the property
  2. I would like to have the shell script automatically exit with a return value of 1 if any of the commands return a non-zero value.
  3. How does the pilot control the Dassault Rafale?
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My attempt to post a clean, short code sample ignored this because I did not realize how significant it was (I'm still fairly new to bash scripting). It just implies that if you had set -e at the beginning of the script, you don't need to say set +e to ignore errors. The solution to this is to make the changes an (almost) atomic operation. navigate here It's possible to write scripts which minimise these problems.

For example, suppose you have this script #!/bin/bash set -e ./configure > configure.log make ... Bash Script Error Message In the child script child_1.sh, I have something like this: if [ $SOME_BAD_CONDITION ] ; then echo "Error message...." exit 1 fi In the parent, I have this: #!/bin/bash set -e The specific bash is: #!/bin/sh invoke-rc.d tomcat stop rm -fr /var/webapps/ cp -R $WEBAPP /var/webapps/ invoke-rc.d tomcat start I want to exec "invoke-rc.d tomcat stop" and even if Tomcat is not

I had a problem in the child script, but it seems I over-simplified the child script in the original post, which is why no one caught it. –FrustratedWithFormsDesigner Feb 25 '15

add a comment| 7 Answers 7 active oldest votes up vote 103 down vote That's exactly what bash's if statement does: if command ; then echo "Command succeeded" else echo "Command david% bash /tmp/shrink-chroot.sh $chroot= david% bash -u /tmp/shrink-chroot.sh /tmp/shrink-chroot.sh: line 3: $1: unbound variable david% Use set -e Every script you write should include set -e at the top. The && operator acts like a short-circuit AND operator, and a zero exit code is pretty much like a true boolean value. Bash Script Error Exit How to handle spending money for extended trip to Europe?

Join them; it only takes a minute: Sign up Execute a shell command from a shell script without stopping if error occurs up vote 20 down vote favorite 5 In a is required is when it needs to be checked against multiple values: command case $? Can you maybe explain? –Toskan Jun 25 '12 at 9:37 2 @Toskan > /dev/null Redirects stdout to /dev/null. 2>&1 redirects stderr to stdout, effectively sending both stdout and stderr to his comment is here Also look at set -u.

See the How to Ask page for help clarifying this question.If this question can be reworded to fit the rules in the help center, please edit the question. @StéphaneChazelas: spectral norm of block-wise sums of matrices Does mean=mode imply a symmetric distribution? if "`command` returns any error"; then echo "Returned an error" else echo "Proceed..." fi bash control-flow share|improve this question edited Oct 16 '11 at 23:57 Michael Mrozek♦ 44.9k19144179 asked Oct 16 Use set -u How often have you written a script that broke because a variable wasn't set?

If you ask rm to delete a non-existent file, it will complain and your script will terminate. (You are using -e, right?) You can fix this by using -f, which will silently Why can a Gnome grapple a Goliath? The disadvantage of this technique is that you need to use twice as much disk space and that any process that keeps files open for a long time will still have if anyone know how to remove lines in a file containing two dots at one line by sed, please kindly share. Remove advertisements Sponsored Links postcd View Public

Browse other questions tagged bash wget . If those conditions are true, then check whether or not it has a size greater than 0. #!/bin/bash echo "Which error log are you checking today? " read answer if [ Offhand I'd guess that you could use both together; bad wording on my part; I should have said "and/or". –lumpynose Jun 1 at 17:37 add a comment| up vote 6 down Here's my test: #!/bin/bash set -u set -e foo() { rm MissingFile.txt } echo 1 [[ $(foo 2>&1) =~ "No such file" ]] echo 2 This produces a '(' expected error.

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#7 12-10-2013 hergp Problem Eliminator Join Date: Jan 2010 Last Activity: 29 September 2016, 3:33 PM EDT Location: Vienna, Austria I edited this post a few times and failed to notice that I left the paths in tact :) I must be slightly brain dead today. –Tim Post♦ Jul 2 '09 Good way to explain fundamental theorem of arithmetic? Problem?

What are the holes on the sides of a computer case frame for? Unfortunately it means you can't check $? When the child script fails, I'd like the parent to fail as well. This tells bash that it should exit the script if any statement returns a non-true return value.

And, as discussed above, || short-circuits so the RHS is only executed if the LHS fails (returns non-zero). How to indicate you are going straight? Hot Network Questions How to map and sum a list fast?