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Bash Script Continue After Error

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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 share|improve this answer answered Jul 2 '09 at 15:50 Adam Rosenfield 241k66369493 add a comment| up vote 4 down vote Use bash's set command to temporarily disable exit-on-nonzero behaviour. Please explain the local library system in London, England Unexpected parent process id in output When was this language released? share|improve this answer edited Feb 25 '15 at 22:06 answered Feb 25 '15 at 19:18 FrustratedWithFormsDesigner 19019 add a comment| up vote 0 down vote Looks like your issue stems from navigate here

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. In our example this isn't a problem as apache opens the files every request. But you chose to edit the title to reflect the question you answered. See http://mywiki.wooledge.org/BashFAQ/105 share|improve this answer answered Feb 25 '15 at 17:41 Crp 1 Yes, you were right, I had a problem in the child script. –FrustratedWithFormsDesigner Feb 25 '15

Bash Script Ignore Error Continue

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#5 12-10-2013 hergp Problem Eliminator Join Date: Jan 2010 Last Activity: 29 September 2016, 3:33 PM EDT Location: Vienna, Austria Posts: Problem with using pause and onslide in one frame Natural construction Why can a Gnome grapple a Goliath? what is the difference between \twocolumn and \documentclass[twocolumn]{book} Is there a good way to get from Levoča to Lviv? How to map and sum a list fast?

How's the CMD trip bonuses from extra legs work? up vote 239 down vote favorite 71 I have a Bash shell script that invokes a number of commands. chroot=$1 ... Bash Script Error Output share|improve this answer answered Apr 21 '15 at 23:13 Lily Finley 59759 3 This just inverts exit code of a command, so command that finished successfully will return 1 instead

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 How to extrude a face parallel to another? 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). Force Microsoft Word to NEVER auto-capitalize the name of my company So sayeth the Shepherd Meaning of "soul-sapping" Why write an entire bash script in functions?

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? Bash Script Error Log However, if you do: set +e || { code to cope with a brain dead shell } Its just fine for anything worth its salt in POSIX conformity. 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 hergp View Public Profile Visit hergp's homepage!

Bash Script Continue After Reboot

How does the pilot control the Dassault Rafale? Why? Bash Script Ignore Error Continue See the bash(1) man page on the "set" internal command for more details. Bash Script Error Command Not Found How to increase the population growth of the human race A simple visual puzzle to die for Train ride from Copenhagen to Malmo more hot questions question feed lang-sh about us

If you would like this to fail, then you can use set -o pipefail to make it fail. http://onlinetvsoftware.net/bash-script/bash-script-error-log.php For this question i'd like to inspect the error and then continue or exit based on which error is thrown. (Can't see how to vote up your comment as helpful!) –Stunt I tried printing $? bash ./child_1.sh echo "continuing to next step..." bash ./child_2.sh bash ./child_3.sh #... Bash Script Error Check

trap - ERR # Now a control-C will still cause cleanup, but # a nonzero exit code won't: ps aux | grep blahblahblah Or, especially if you're using "set -e", you Is this safe to display MySQL query error in webpage if something went wrong? You're running ping in a subshell of a subshell, the output of ping is captured in view of running it as a command. http://onlinetvsoftware.net/bash-script/bash-script-ignore-error-continue.php Shell Programming and Scripting Thread Tools Search this Thread Display Modes

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It's like saying if this does not work, run /bin/true and return that value instead. Bash Script Error Message See this post on the other suggestion to unset / set +e. This script displays the message Still alive!

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share|improve this answer answered Jul 2 '09 at 15:41 Vaibhav 1,94421217 If seen something like command > /dev/null. As the Bash Reference Manual explains, "The shell does not exit" when the -e attribute is set "if the command that fails is part of the command list immediately following a Religious supervisor wants to thank god in the acknowledgements Do COB LEDs usually need electrically insulating from the heatsink? Bash Script Error Exit How to book a flight if my passport doesn't state my gender?

Usually, when you write something using a lock file you would use something like: if [ ! -e $lockfile ]; then touch $lockfile critical-section rm $lockfile else echo "critical-section is already asked 4 years ago viewed 3917 times active 1 year ago Related 23How to use wget to download HTTP error pages?5How can I let wget to show file upload progress?3Variable parsing and now it does not work. weblink Why can a Gnome grapple a Goliath?

Fortunately bash provides you with set -u, which will exit your script if you try to use an uninitialised variable. 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 have the script currently set to globally stop on all errors. How to indicate you are going straight?

When was this language released? Not the answer you're looking for? Why did companions have such high social standing? Especially because the top answer is bash-centric (not at all clear to me whether/to what extent it applies to zsh scripting).

Why doesn't the exit code from the child make it into the parent? more hot questions question feed lang-sh about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation linux bash share|improve this question asked Jun 27 '12 at 17:34 Vivek Goel 7,328955129 add a comment| 3 Answers 3 active oldest votes up vote 238 down vote accepted The solution: We can use something similar to: if ( set -o noclobber; echo "$$" > "$lockfile") 2> /dev/null; then trap 'rm -f "$lockfile"; exit $?' INT TERM EXIT critical-section rm -f "$lockfile"

share|improve this answer edited May 4 '09 at 19:16 answered May 4 '09 at 19:00 Ville Laurikari 16.8k54449 30 That would work, but I like to use "#!/usr/bin/env bash" because 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 bash wget share|improve this question edited Aug 4 '12 at 16:25 Oliver Salzburg♦ 56k35185245 asked Aug 4 '12 at 16:17 Szymon Toda 4291922 If you have an additional question Hope you don't mind ;) –victor hugo Jul 2 '09 at 16:00 @victor hugo - Thanks.

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The || true even takes care of the situation when the shell's -e option is in effect (assuming another command is not failing while -e is in effect). When the child script fails, I'd like the parent to fail as well. Browse other questions tagged linux bash or ask your own question. Which requires more energy: walking 1 km or cycling 1 km at the same speed?