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Bash Script Continue After Error


Tomorrow you make a seemingly trivial change: #!/bin/bash set -e ./configure | tee configure.log make ... I'm not sure i understand how this handles varying errors. –Stunt Jul 24 '13 at 10:04 @Stunt This isn't a replacement. How to indicate you are going straight? 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. http://sovidi.com/bash-script/bash-script-continue-on-error.php

Intuition behind Harmonic Analysis in Analytic Number Theory Do COB LEDs usually need electrically insulating from the heatsink? I have the script currently set to globally stop on all errors. From man set "if a simple command (see SHELL GRAMMAR above) exits with a non-zero status. e.g.

Bash Script Ignore Error Continue

For example, false | true will be considered to have succeeded. 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 It's a logical OR. share|improve this answer edited Jun 4 '13 at 13:48 fedorqui 108k30164211 answered May 4 '09 at 19:02 lumpynose 74739 15 To potentially save others the need to read through help

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 [ Obviously, the correct way is if ping ...; then here. –Stéphane Chazelas Apr 1 '15 at 15:40 add a comment| Your Answer draft saved draft discarded Sign up or log What does an 'ü' mean? Bash Script Error Output up vote 1 down vote favorite I save images with: #!/bin/bash for i in {1..30000} do wget "http://services.runescape.com/m=itemdb_rs/3809_obj_sprite.gif?id="$i done Is there a way to speed up the process?

Does mean=mode imply a symmetric distribution? Be atomic Sometimes you need to update a bunch of files in a directory at once, say you need to rewrite urls form one host to another on your website. However i would like for this small sub-section is slightly different. Why?

but I doubt that this is a concern for you. Bash Script Error Log Be prepared for spaces in filenames Someone will always use spaces in filenames or command line arguments and you should keep this in mind when writing shell scripts. You can use command || true, or if you have a longer section of code, you can turn off the error checking, but I recommend you use this sparingly. Unix & Linux Stack Exchange works best with JavaScript enabled current community chat Unix & Linux Unix & Linux Meta your communities Sign up or log in to customize your list.

Bash Script Continue After Reboot

which works as expected: an error in configure aborts the execution. I was inattentive. Bash Script Ignore Error Continue bash version: 4.2.25 UPDATE: I tried echoing $?: bash ./child_1.sh echo $? Bash Script Error Command Not Found When taking passengers, what should I do to prepare them?

The exit statement was buried inside a code block (between { and }) which was piped to tee for logging: { #... http://sovidi.com/bash-script/bash-script-bus-error.php Join them; it only takes a minute: Sign up Bash ignoring error for a particular command up vote 144 down vote favorite 16 I am using following options set -o pipefail I'm essentially trying to mimic the try{}catch{} from c# –Stunt Jul 24 '13 at 10:00 add a comment| 2 Answers 2 active oldest votes up vote 29 down vote accepted In Is this safe to display MySQL query error in webpage if something went wrong? Bash Script Error Check

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#1 12-10-2013 postcd Banned Join Date: Oct 2013 Last Activity: http://sovidi.com/bash-script/bash-script-ignore-error-continue.php Post some runnable code that would let us reproduce the problem. –Gilles Feb 25 '15 at 23:39 | show 2 more comments 3 Answers 3 active oldest votes up vote 1

You're correct. –Joe Jan 14 '12 at 10:09 | show 5 more comments up vote 37 down vote For small things that you want to happen if a shell command works, Bash Script Error Message See my added answer. –leonbloy Dec 3 '10 at 14:23 43 Also, the flags on the shebang line are ignored if a script gets run as bash script.sh. –Tom Anderson Why can a Gnome grapple a Goliath?

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?

Browse other questions tagged bash shell-script pipe exit or ask your own question. You can also use the slightly more readable set -o nounset. TERM Terminate - this signal is sent when someone sends the TERM signal using the kill command. Bash Script Error Exit Why are some programming languages Turing complete but lack some abilities of other languages?

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. Not the answer you're looking for? What is the sh -c command? navigate here I personally start almost all shell scripts with "set -e".

share|improve this answer answered Jun 27 '12 at 17:37 Lars Kotthoff 72.4k9100117 add a comment| up vote 20 down vote More concisely: ! Use set -u How often have you written a script that broke because a variable wasn't set? There are other constructs you could use: command if [ "$?"-ne 0]; then echo "command failed"; exit 1; fi could be replaced with command || { echo "command failed"; exit 1; Hope you don't mind ;) –victor hugo Jul 2 '09 at 16:00 @victor hugo - Thanks.

And, as discussed above, || short-circuits so the RHS is only executed if the LHS fails (returns non-zero). 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 Hot Network Questions How to map and sum a list fast? Is the following extension of finite state automata studied?

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 How does the pilot control the Dassault Rafale? How to book a flight if my passport doesn't state my gender? 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.

example: Code: while read domain;do nslookupout=$(nslookup -type=ns $domain) || true another commands done < filenamewithdomains i added: || true after the command in belief it will just skip failures. Force Microsoft Word to NEVER auto-capitalize the name of my company Which requires more energy: walking 1 km or cycling 1 km at the same speed? 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 But because the output is redirected to /dev/null that will always be the empty string.

I tried it myself just now, and my parent script did get the correct exit code back. Skipping directly to level 4 Intuition behind Harmonic Analysis in Analytic Number Theory I accepted a counter offer and regret it: can I go back and contact the previous company? However i would like to continue executing on this error. I thought that having set -e would ensure that my parent script fails if any child script exists with a non-zero exit code, but that doesn't seem to be happening.

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 What could cause the throttle to stick in my Ford Ranger?