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Bash Script Exit On Command Error

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Results 1 to 8 of 8 Thread: [SOLVED] Make shell script exit as soon as a command in it returns an error? Unfortunately it means you can't check $? COMMAND_LAST # Will exit with status of last command. Revised. Check This Out

Originally Posted by jasper.davidson One more question though if you have time; is there any way to exclude a single command from causing the script to exit when I use "set trap : 0 echo >&2 ' ************ *** DONE *** ************ ' share|improve this answer answered Mar 6 '14 at 12:19 supercobra 2,90242737 1 trap 'abort' 0 <- why you In fact, all the shells I know of do make the parent return at this point. GTIN validation Should indoor ripened tomatoes be used for sauce?

Bash Script Exit If Command Fails

So to check the exit status, we could write the script this way: # Check the exit status cd $some_directory if [ "$?" = "0" ]; then rm * else echo Skeletal formula for carbon with two double bonds more hot questions question feed default about us tour help blog chat data legal privacy policy work here advertising info mobile contact us In particular you should use quotes around variables.

Do something like this: Code: #!/bin/sh set -e ... ls | bogus_command # bash: bogus_command: command not found echo $? # 0 # Note that the ! Didn't know about Code Review. –skozin Jan 11 at 17:27 add a comment| up vote 2 down vote To expand on the @Gilles' answer: Indeed, set -e doesn't work inside commands Bash Shell Script Exit if [ -d "$1" ] then printf "${green}${NC}\\n" "$1" cd -- "$1" else printf "${red}${NC}\\n" "$1" fi But if your purpose is to silence the possible errors then cd -- "$1"

Options share|improve this answer edited Aug 22 at 4:52 Djidiouf 309 answered May 18 at 12:43 Mykhaylo Adamovych 4,84094063 add a comment| Your Answer draft saved draft discarded Sign up Bash Script Command Exit Code The sample script runs two commands touch and echo, since we did not specify an exit code the script exits with the exit code of the last run command. Related 5How to catch an error in a linux bash script?5Bash capture any error like -e but don't exit, do something else2How to have a bash script perform a specific action 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.

Second, the ${a[#]} is weird and its is why is giving errors... Bash Script Exit While Loop I once had a Unix system administrator who wrote a script for a production system containing the following 2 lines of code: # Example of a really bad idea cd $some_directory One such problematic case is the one you encountered: a nonzero return status from a command substitution. This way the returncode ($?) is set.

Bash Script Command Exit Code

echo 'Bad: has not aborted execution on syntax error!' Result (bash-3.2.39 or bash-3.2.51): $ ./sh-on-syntax-err ./sh-on-syntax-err: line 10: #: syntax error: operand expected (error token is "#") status 1 Bad: has Verbs of buttons on websites How to increase the population growth of the human race Are there any 'smart' ejection seats? Bash Script Exit If Command Fails Instead of cd and then check if it exists, check if it exists then go into the directory. Bash Script Exit With Error Message david% foo() { for i in [email protected]; do printf "%s\n" "$i"; done }; foo bar "baz quux" bar baz quux david% foo() { for i in "[email protected]"; do printf "%s\n" "$i";

Good way to explain fundamental theorem of arithmetic? his comment is here One more question though if you have time; is there any way to exclude a single command from causing the script to exit when I use "set -e" at the beginning? Using "set -e" as accepted above works fine. –pauldoo Sep 2 '15 at 19:45 add a comment| up vote 1 down vote In case script is calling subscript inside, the pipefail TERM Terminate - this signal is sent when someone sends the TERM signal using the kill command. Bash Script Exit On Failure

Not the intended behavior! It is also important that your scripts return a meaningful exit status when they finish. This variable will print the exit code of the last run command. http://sovidi.com/bash-script/bash-script-error-exit.php Browse other questions tagged bash shell-script or ask your own question.

You can check the if testing flags at: Bash if documentation: share|improve this answer edited Jan 11 at 17:13 Gilles 369k666681119 answered Oct 22 '13 at 10:52 BitsOfNix 3,112926 Bash Script Exit Function Adopt A Jet/Book How rich can one single time travelling person actually become? Adv Reply December 11th, 2008 #8 jasper.davidson View Profile View Forum Posts Private Message 5 Cups of Ubuntu Join Date Jul 2008 Beans 26 Re: Make shell script exit as

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Execution: $ ./tmp.sh Could not create file $ echo $? 1 Using exit codes on the command line Now that our script is able to tell both users and programs whether The Linux Documentation Project has a pretty good table of reserved exit codes and what they are used for. Were slings used for throwing hand grenades? Bash Script Exit If No Arguments Commands in test positions are allowed to fail (e.g.

Thanks again. For example, if (( 5 * $b > 53 )). More exit codes The exit command in bash accepts integers from 0 - 255, in most cases 0 and 1 will suffice however there are other reserved exit codes that can http://sovidi.com/bash-script/bash-script-error-command-not-found.php How rich can one single time travelling person actually become?

no outgoing connection via ipv4 Now I know my ABCs, won't you come and golf with me? share|improve this answer edited Jan 11 at 17:11 answered Oct 23 '13 at 16:19 Gilles 369k666681119 Recently I experimented a little and discovered a convenient way of fixing || A careful reading of the output of help set shows: -e Exit immediately if a command exits with a non-zero status. asked 6 years ago viewed 93062 times active 1 month ago Linked 115 Stop on first error 3 How to execute a bash script line by line? 8 Jenkins succeed when

Adv Reply December 11th, 2008 #4 jasper.davidson View Profile View Forum Posts Private Message 5 Cups of Ubuntu Join Date Jul 2008 Beans 26 Re: Make shell script exit as The wait builtin will return the exit code of the inner command, and now you're using || after wait, not the inner function, so set -e works properly inside the latter: According to the interpretation above, the subshell may return a nonzero status, but since this is not a simple command in the parent shell, the parent shell should continue. Please enable JavaScript to view the comments powered by Disqus.