The exit tag has no wiki summary.
1
vote
1answer
17 views
How do I obtain the kill signal / message / reason within a script?
I am using the following trap:
trap OnExit EXIT
And in my OnExit function I would like to capture all the info I can on what happened so I can write it to a log file. Id like to know who, why, how, ...
0
votes
2answers
52 views
Exit the bash function, not the terminal
I have a bash script as below which installs zookeeper but only if not installed already.
##zookeper
installZook(){
ZOOK_VERSION="3.4.5"
ZOOK_TOOL="zookeeper-${ZOOK_VERSION}"
...
2
votes
1answer
27 views
What signal does X send to its clients when it receives SIGINT?
If I terminate the Xorg server with a SIGINT signal (eg. when I press Ctrl+C), what signal does it send to its clients?
1
vote
1answer
29 views
How can I return a specific error code at this point in my TCL script?
I have a TCL expect script that runs a scp command for uploading a config file to my DNS server:
#!/usr/bin/expect -f
set config "~/dnsmasq.conf"
spawn /usr/bin/scp "$config" ...
2
votes
3answers
252 views
How to copy or read the return value (exit status) from AWK script into the shell script (bash) to be used in if statement to compare
I want to read the error codes or the exit status of awk script into shell to use in if condition to compare for error handling
my shell script looks something like:
My script:
#!/bin/sh
awk -v ...
1
vote
3answers
77 views
How do I shutdown the system after a particular process exits
I am downloading some software; I can see the pid of the download process with top. Let's say it's 1001.
How can I make it so that my computer shuts down after process 1001 exits?
6
votes
1answer
84 views
How do I capture the exit code / handle errors correctly when using process substitution?
I have a script that parses file names into an array using the following method taken from a Q&A on SO:
unset ARGS
ARGID="1"
while IFS= read -r -d $'\0' FILE; do
ARGS[ARGID++]="$FILE"
done ...
3
votes
1answer
200 views
Unable to get the right exit code from a script
I have a script which connects to a remote server via SFTP and get some file from there. My script goes like this:
/usr/bin/sftp [email protected] <<EOF
lcd /dir1/dir2/dir3
cd ...
3
votes
0answers
159 views
Proper usage of EXIT & ERR traps in bash scripts [closed]
I'm working on a bash script and as I've been going I've learned about traps, signals, function return codes and other such features I've not previously used.
I may be thinking about things ...
2
votes
5answers
2k views
What does exit 99 means?
I'm new to Unix.
Just want to know what is exit 99 and why would one use it and what are the significance uses of it.
For example, I'm using exit 99.
1
vote
1answer
70 views
How to get exit code of a parallel process launched by xargs?
I'd made a script for launching parallel rsync process:
#! /bin/bash
LIST=$1
DEST_DIR=$2
RSYNC_OPTS=$3
#echo "rsyncing From=$SRC_DIR To=$DEST_DIR RSYNC_OPTS=$RSYNC_OPTS"
echo $LIST|xargs -n1 -d, ...
2
votes
3answers
76 views
Get exit status of a process over SSH
Not sure how to google this (I tried with some things and didn't get much) or how this is even called. This is my typical workflow:
SSH to a server
run something there and leave it running in ...
1
vote
1answer
609 views
How to exit out of the shell script successfully so that python subprocess think it is successfull exit? [closed]
Below is my shell script which simply execute a url like this http://example.com:8080/beat and parse the response and verify certain conditions on it. If that condition is met, then exit successfully ...
5
votes
4answers
161 views
Can a program next in a pipeline see the exit code of the previous program?
I would like to make a pipeline of Bash scripts like this
prog1 | prog2
such that prog2 can see the exit code of prog1 and act differently based on that information.
Is this possible?
5
votes
3answers
568 views
reliable return code of background process
Let's assume the following piece of bash code:
foo > logfile 2>&1 &
foo_pid=$!
while ps -p$foo_pid
do
ping -c 1 localhost
done
wait $foo_pid
if [[ $? == 0 ]]
then
echo "foo ...
2
votes
2answers
89 views
Why does procmail send a copy of an inbound message to sender if it encounters an exit code?
I have a very simple procmail process that takes an inbound email and redirects it to a script:
LOGFILE=/home/foo/procmail-log
VERBOSE=yes
MAILDIR=/var/spool/mail/foo
DEFAULT=/var/spool/mail/foo
...
0
votes
2answers
97 views
How do I get the list of exit codes (and/or return codes) and meaning for a command/utility?
Is there a way I can do what stated in the title from the terminal commands, or will I have to look into the codes?
16
votes
9answers
1k views
How to make sure that a command is not interrupted, even if terminal is closed? [duplicate]
In Linux. Say I want to run a command and it takes too long. I just want to ensure it's done. How?
3
votes
2answers
532 views
test if return true if grep on output has string in one line
I just want to return true or false if a service is running. Here is where I'm at, not first try or last but current at writing:
service iptables status | grep -qi "not running"
The sdtout for ...
0
votes
1answer
105 views
if env variable exists then exit out of script
#!/bin/bash
if [[ -n "$MYVAR" ]]; then exit; fi
# otherwise the rest of the script continues...
I'm trying to exit out of a shell script if a certain ENV variable is 0. The script above does not ...
2
votes
2answers
430 views
Busybox ash script does not exit cleanly after executing cat; unable to get exit code
Consider the following script wrapcat.sh (a wrapper for cat) for illustrative purposes. It is run with busybox (ash) in an embedded Linux 2.6 box.
#!/bin/sh
cat $1
Under certain circumstances, this ...
3
votes
2answers
203 views
What is “Exit 2” from finished background job status?
I have an exercise to put in a file some data (*conf from some directories) and need to do this in background. I did it and I am wondering what is the meaning of output messages:
[A@localhost tests]$ ...
0
votes
2answers
212 views
Test if number from range <0,infinity)
I have a problem
If [[ * ]]
then
continue
else
exit 1
fi
I want to test that the argument to my switch (for example -d 3) is a valid positive decimal integer number (a sequence of one or more of ...
2
votes
1answer
112 views
How to have a bash script perform a specific action on errors of _each_ command?
Similarly to set -e performs an exit on "uncaught" $? != 0, I'd like to have this event trigger the execution of another command, e.g. a logger call. How can this be done?
64
votes
4answers
1k views
Can I somehow add a “&& prog2” to an already running prog1?
Most shells provide functions like && and ; to chain the execution of commands in certain ways. But what if a command is already running, can I still somehow add another command to be executed ...
3
votes
1answer
351 views
How to trick an init script into returning 0
I have a init script which is poorly designed because it does not conform to the Linux Standard Base Specifications
The following should have an exit code of 0 if running, and 3 if not running
...
12
votes
3answers
996 views
Wait command usage in Linux?
#!/bin/bash
function back()
{
sleep $1
exit $2
}
back $1 $2 &
b=$!
if `wait $!`;then
echo success
else
echo failure
fi
bash-3.00# ./back 300 0
failure
bash-3.00# ./back 300 1
...
14
votes
2answers
529 views
1
vote
2answers
810 views
PHP exec command has the result 0 even if an error occurs
I have this PHP code:
$execout=exec('ssh [email protected] "sudo /etc/init.d/smokeping reload"',$output1,$result);
if($result !=0){
echo"that can't reload";
}
else{
echo "successfully ...
0
votes
2answers
2k views
Expect script within bash & exit codes
I have a bash script that calls an expect script.
The expect script has several conditions. It ssh's into a box and executes a command, and there are different possible errors that could happen which ...
0
votes
2answers
178 views
Unix command to exit from command prompt
How can I exit from command prompt from shell file?
shell file contains :
if(); then
// some unix code here
else
// want to exit from cmd prompt or Kill current cmd prompt
fi
can any knows @ it?
1
vote
0answers
1k views
Using sshpass, return code (exit status) differs for reasons unknown using valid commands
There are a few things going on here but I think ultimately, either CLish or SSH is returning an exit code that is messing up my work flow.
I'm attempting to connect to a remote machine (CLish shell) ...
0
votes
1answer
637 views
ksh - map Ctrl-D to exit shell
I would like to know how we can map the keys Ctrl-D in ksh to exit the shell as it does in bash shell.
Not much familiar with key binding in ksh.
Edit
My comments are after the <!-- string ...
5
votes
3answers
466 views
bash -e exits when let or expr evaluates to 0
I have a bash script that sets -e so the script will exit on any exit status != 0.
I'm trying to do some basic shell arithmetic assigned to variables and sometimes the expression equals 0 which ...
2
votes
1answer
260 views
Exit status ($?) of 148 upon Ctrl+Z
I just customized my .bashrc to include the exit status of the last command, so I get fancy prompts like
☑ larsmans@host:~$
and I no longer have to re-run commands to see their exit status because ...
3
votes
1answer
1k views
Why won't my bash script exit after execution?
I compiled a short bash one-liner to focus a running application or launch it if it isn't running:
#!/bin/bash
#intellilaunch.sh
wmctrl -a $1 || $1 & disown
exit 1
The command exits perfectly ...
2
votes
2answers
105 views
Are any files loaded when a terminal session terminates?
I know that .profile / .bash_profile are loaded when a terminal session is started, either through local machine or SSH. Are there any files that are loaded/called when the session terminates?
...
3
votes
3answers
736 views
What does exit do in an if block in a shell script?
I have a question regarding unix shell script.
Say if you do exit 1 in inner if: will it exit or will it still execute the outer if? The following is a dummy example.
if [ "$PASSWORD" == ...
1
vote
2answers
466 views
Negate exit code without using shell features
Is there any standard command that will negate the the exit code of another command provided as an argument without using shell features, or starting a shell?
I have a program that does something ...
3
votes
2answers
292 views
How to write an abort-on-error script without adding `|| exit $?` to every line?
I'm writing a bash script that should exit the error code of the last failed command and not continue execution. This can be achieved by adding a || exit $? everywhere, but is there an easier way, ...
5
votes
1answer
202 views
How does sh -e interact with &?
I'm using sh (dash) on Ubuntu (lucid) and the manpage has this to say about -e:
-e errexit If not interactive, exit immediately if any untested command fails.
...
6
votes
3answers
2k views
exit shell script from a subshell
Consider this snippet:
stop () {
echo "${1}" 1>&2
exit 1
}
func () {
if false; then
echo "foo"
else
stop "something went wrong"
fi
}
Normally when func ...
2
votes
3answers
355 views
Return value of commands when using stdin?
Imaging I am executing the following command:
echo "root:mypass" | chpasswd
How can I get the return code / error code returned by chpasswd? Is that possible in this case at all? I tried
RET = ...
3
votes
1answer
398 views
wait does not wait
If i have a file called myprogram containing
sleep 200
date
Run this in the background:
$ sh myprogram &
i want to know when myprogram has completed by using wait command
$ cat >notify
...
17
votes
1answer
472 views
Is there a standard command that always exits with a failure?
I want to test my script with a command that fails. I could use an existing command with bad arguments. I could also write a simple script that immediately exits with a failure. Both of these are easy ...
3
votes
1answer
575 views
Evaluating the return value of a command line
How do I evaluate or calculate the return value of a command line?
For exemple, I count the number of lines with a grep and I want to know if that value is above X. If so, I want to print the number ...
6
votes
6answers
16k views
exit out of all SSH connections in one command and close PuTTY
Is there a way to back out of all SSH connections and close PuTTY in "one shot"? I work in Windows 7 and use PuTTY to SSH to various Linux hosts.
An example of the way I find myself working:
SSH to ...
1
vote
2answers
1k views
How to pass data outside process for zenity progress?
Usually this would be a question about how to pass data from a subprocess to a main process, but maybe zenity has some extra quirks so please focus on zenity.
Example:
#!/bin/sh
(
echo "10" ; sleep ...
4
votes
2answers
7k views
Why do I get error 255 when returning -1
I'm new into C++ programming and I have a very basic question.
I've noticed that when I return -1 in C++ program and then check the exit status, I get 255. Why is that?
The code is the most basic:
...
3
votes
2answers
2k views
Exit Google Chrome from terminal
Is there a way to cause google-chrome to quit, from the terminal, besides using killall google-chrome?
I would like to be able to close it from a script without killing it.
