Home > Exit Code > Bash If Exit Code Not 0

Bash If Exit Code Not 0


The command itself failed. if [[ ${JOBS[${pid}]} -ne 0 ]]; then status=${JOBS[${pid}]} echo -e "[${pid}] Exited with status: ${status}\n${cmd}" fi done return ${status} } background 'sleep 1 ; false' background 'sleep 3 ; true' background 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 But what if you embed the grep command in a script? Source

In it, you'll get: The week's top questions and answers Important community announcements Questions that need answers see an example newsletter By subscribing, you agree to the privacy policy and terms to find out the exit status of command. $? In other words, these definitions do not reflect the common practice at the time (1993) but were intentionally incompatible with it. Execution: $ ./ Could not create file Providing your own exit code While the above revision will provide an error message if the touch command fails, it still provides a 0 Clicking Here

Bash If Exit Code Not 0

FUNCmyCmd() { sleep 3;return 6; }; export retFile=$(mktemp); FUNCexecAndWait() { FUNCmyCmd;echo $? >$retFile; }; FUNCexecAndWait& now, your script can do anything else while you just have to keep monitoring the contents echo "ls command exit stats - $status" Exit Status Shell Script Example A simple shell script to locate username ( #!/bin/bash # set var PASSWD_FILE=/etc/passwd # get user name read -p A list of signals can be found in the signal man page (run "man signal"). Reply Link davb March 6, 2013, 4:05 pmActually, rather than grep “^”"$USR”"$”, just use grep -w $USR ….easy!

The exit status is an integer number. To avoid the problem, one way would be to write it as: { foo_pid=$! done echo "" # Now wait for each monitored process and check return status with expected failed=0 for i in 1 2 3 4 do wait ${plist[$i]} rv=$? Linux Return Code 1 UNIX is a registered trademark of The Open Group.

true !true # No error this time, but no negation either. # It just repeats the previous command (true). # =========================================================== # # Preceding a _pipe_ with ! Grease on an ice elemental Can't use the "at" utility Solve equation in determinant Need a better layout, so that blank space can be utilized Shortest auto-destructive loop Why is Rogue Run it as follows: chmod +x ./ Sample Outputs: Enter a user name: vivek User 'vivek' found in /etc/passwd file. more hot questions question feed default about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation

exit $?

#!/bin/bash COMMAND1 . . . Write A Shell Script To Calculate Sum Multiplication Of Three Variables Using Expr Keyword Could you make me a hexagon please? Not the answer you're looking for? How do I select an extra row for each row in the result set in SQL?

Linux Exit Code

Reply Link Erik February 15, 2016, 2:40 pm$ ssh localhost “./cyberciti; echo $?” Did you notice it was all in quotes? Not the answer you're looking for? Bash If Exit Code Not 0 I want to modify the script as follows: Run the command CMD in parallel as a background process ($CMD &). Bash Script Exit On Error This is stored in OUT variable.

Politely asking for more work as an intern Confusion in fraction notation Grease on an ice elemental Solve equation in determinant Crossreferencing verbatim 'sudo' is not installed, I can't install it, Is there a limit to the number of nested 'for' loops? In this case the 3rd field of the output can be Stopped|Running|Done|Exit . ). bar & wait "$pid" You've got no guarantee that bar will not be given the same pid as foo (if foo has terminated by the time bar starts), so even though Bash Set Exit Code

jobs -l also reports the pid. Here's an extract from man bash regarding waiting for background processes. POSIX requires that a shell remembers the exit status of at least 25 jobs after they're gone, but bash remembers a lot more than that. have a peek here Run it again: chmod +x ./ Sample Outputs: Enter a user name: tommy User 'tommy' not found in /etc/passwd file.

What is this device attached to the seat-tube? Bash Return Value From Function Could you make me a hexagon please? Privacy policy About Linux Shell Scripting Tutorial - A Beginner's handbook Disclaimers Mobile view Advanced Bash-Scripting Guide: PrevNext

Chapter 6.

Notes None of the earlier answers describe exit status 2 correctly (hence this answer).

Actions such as printing to stdout on success and stderr on failure. Testing for exit codes Earlier we used the $? If you have time you can come up with a more robust way to tell whether the process is still running). Exit Bash Shell Sounds like a bug. –Stéphane Chazelas Feb 20 '14 at 20:06 add a comment| up vote 0 down vote I believe your assumption is correct.

while ps | grep " $my_pid " # might also need | grep -v grep here do echo $my_pid is still in the ps output. Statements about groups proved using semigroups Could you make me a hexagon please? Do you say prefix K for airport codes in the US when talking with ATC? Check This Out 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.

In this case, the last run command is the echo command, which did execute successfully. In sysexits.h, mentioned in the most popular answer, exit status EX_USAGE ("command line usage error") is defined to be 64. Create a file that contains the exit status. # The filename is the PID of this group's subshell. What's the purpose of the same page tool?

does not change the execution of the pipe. # Only the exit status changes. # =========================================================== # # Thanks, Stphane Chazelas and Kristopher Newsome.

Will Minecraft map items automatically update with terrain changes?