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Unix Shell Script Raise Error

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Shell Script Exit Code

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Shell Script Exit On Error

just like you, helping each other. Join them; it only takes a minute: Sign up Raise error in bash script up vote 7 down vote favorite 1 I want to raise an error in a Bash script

Bash Catch Error

with message "Test cases Failed !!!". How to do this in Bash ? For example: if [ condition ]; then raise error "Test cases failed !!!" fi linux bash error-handling share|improve this question edited Oct 3 at 0:18 wjandrea 1177 asked May 6 '15 at 13:30 user3078630 9318 1 What do you want to happen on this error? How is your script called? Is it just one script or many scripts? What are the bash script exit on error uses of your script going to look like? –Etan Reisner May 6 '15 at 13:32 just one script. I called it using ubuntu terminal like ./script/test.sh –user3078630 May 6 '15 at 13:34 unix.stackexchange.com –Seth McClaine May 6 '15 at 13:34 @SethMcClaine it will still be an awful question there. –user4453924 May 6 '15 at 13:35 I agree but at least it would be in the right section –Seth McClaine May 6 '15 at 13:36 | show 1 more comment 1 Answer 1 active oldest votes up vote 11 down vote accepted This depends on where you want the error message be stored. You can do the following: echo "Error!" > logfile.log exit 125 Or the following: echo "Error!" 1>&2 exit 64 When you raise an exception you stop the program's execution. You can also use something like exit xxx where xxx is the error code you may want to return to the operating system (from 0 to 255). Here 125 and 64 are just random codes you can exit with. When you need to indicate to the OS that the program stopped abnormally (eg. an error occurred), you need to pass a non-zero exit code to exit. As @chepner pointed out, you can do exit 1, which will mean an unspecified error. share|impr

here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn bash if exit code more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags linux kernel error codes Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 6.3 million programmers, just like you, exit bash shell helping each other. Join them; it only takes a minute: Sign up How to purposely throw an Error in the shell script up vote 2 down vote favorite I want to write a script which throws an error http://stackoverflow.com/questions/30078281/raise-error-in-bash-script when the status of url is not equal to 200. As this script has to be executed on Jenkins so it should make the build fail.This is the script which i have written - STATUS=$(curl -s -o /dev/null -w '%{http_code}' http://google.com) if [ $STATUS -eq 200 ]; then echo "URL is working fine" break else echo"URL is not working" cd 123 fi The above script works correctly but i need something else instead of -cd 123 syntax. http://stackoverflow.com/questions/21306676/how-to-purposely-throw-an-error-in-the-shell-script shell jenkins share|improve this question asked Jan 23 '14 at 11:21 Kworks 1501616 add a comment| 2 Answers 2 active oldest votes up vote 6 down vote accepted but i need something else instead of -cd 123 syntax You could say: exit 42 instead. This would make the script exit with a non-zero exit code that should be picked up by Jenkins. help exit tells: exit: exit [n] Exit the shell. Exits the shell with a status of N. If N is omitted, the exit status is that of the last command executed. share|improve this answer answered Jan 23 '14 at 11:22 devnull 61.5k16103135 Why the command exit 42 ? –Kworks Jan 23 '14 at 11:55 @kapilGarg Just like that; you could even say exit 1. –devnull Jan 23 '14 at 11:56 add a comment| Did you find this question interesting? Try our newsletter Sign up for our newsletter and get our top new questions delivered to your inbox (see an example). Subscribed! Success! Please click the link in the confirmation email to activate your subscription. up vote 4 down vote The easiest solution is to execute curl and use the -f option. It makes curl exit with non-zero exit code when web server returns something else than 200 OK. You could also make your life easier by setting the -e option f

here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this http://unix.stackexchange.com/questions/97101/how-to-catch-an-error-in-a-linux-bash-script site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Unix & Linux Questions Tags Users Badges Unanswered Ask Question _ Unix http://phaq.phunsites.net/2010/11/22/trap-errors-exit-codes-and-line-numbers-within-a-bash-script/ & Linux Stack Exchange is a question and answer site for users of Linux, FreeBSD and other Un*x-like operating systems. Join them; it only takes a minute: Sign up Here's how it shell script works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top How to catch an error in a linux bash script? up vote 5 down vote favorite 1 I made the following script: # !/bin/bash # OUTPUT-COLORING red='\e[0;31m' green='\e[0;32m' NC='\e[0m' # No Color # FUNCTIONS # directoryExists - Does the directory exist? function directoryExists { cd $1 shell script exit if [ $? = 0 ] then echo -e "${green}$1${NC}" else echo -e "${red}$1${NC}" fi } # EXE directoryExists "~/foobar" directoryExists "/www/html/drupal" The script works, but beside my echoes, there is also the output when cd $1 fails on execution. testscripts//test_labo3: line 11: cd: ~/foobar: No such file or directory Is it possible to catch this? bash shell shell-script error-handling share|improve this question edited Oct 22 '13 at 22:58 Gilles 374k706831129 asked Oct 22 '13 at 10:29 Thomas De Wilde 28114 Just an FYI, you can also do this a lot simpler; test -d /path/to/directory ( or [[ -d /path/to/directory ]] in bash ) will tell you whether a given target is a directory or not, and it will do it quietly. –Patrick Oct 22 '13 at 12:36 @Patrick, that just tests if it's a directory, not if you can cd into it. –Stéphane Chazelas Oct 22 '13 at 12:54 @StephaneChazelas yes. The function name is directoryExists. –Patrick Oct 22 '13 at 13:57 add a comment| 5 Answers 5 active oldest votes up vote 4 down vote accepted Your script changes directories as it runs, which means it won't wo

remOcular Ansible in 10 minutes or less Categories Bits and Bytes (20) Editors (1) HA (10) Hacks (10) Hardware (19) HowTo's (12) Memos (3) Networking (27) Check Point (4) Cisco (6) IPv6 (2) Operating Systems (62) Debian GNU/Linux (7) DOS (2) FreeBSD (26) OS X (19) RHEL (2) Windows (8) Programming (39) MySQL (1) Perl (12) PHP (6) RegExp (2) Scripting (13) Shells (5) TCL (1) Publications (6) Security (4) Utilities (11) Virtualization (21) jails (6) VirtualBox (5) Virtuozzo (2) VMware (4) Xen (3) Recent Tweets There are no recent tweets. November 22, 2010 Trap Errors, Exit Codes and Line Numbers within a Bash script (and some output redirection, too) Posted by: admin : Category: Programming, Scripting, Shells A discussion today was about error handling in shell scripts, Bash in particular. Well, we all know about the usual knitpicks about error handling and the possible consequences in not doing so properly 😉 The most simplistic approach in error handling are of course control structures to check the return value: some arbitrary command if [ "$?" = "0" ]; then do something else do something else fi Or even more simplistic: some arbitrary command && { do something; } || { do something else; } There are more ways to do this. But they all have in common, that it is hard to trap and trace unknown errors, especially if the script runs unattended. If you want to do some logging and tracing, then you would need to implement a routine which you would need to add to each and every block, to ensure you don't miss some particular important information. Even if it is a simple function for error reporting, let's call it error_reporter, you would end up with something like this: some arbitrary command if [ "$?" = "0" ]; then do something error_reporter args else do something else error_reporter args fi But sometimes it's better to have an error handler, which is able to catch errors and do some special actions, while still allowing your script to continue within the normal flow. Even better if that particular error handler also catches and notifies upon yet-unknown and never discovered errors. Let's assume a script, which is trying to delete a directory. For the sake of this example, the directory MUST NOT exist, so the script effectively fails upon execution. We handle the error simply by checking on the non-zero exit code. Please note: The following code serves as an example of bad script programming. Never (as in NEVER) try to

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