The exit tag has no wiki summary.
0
votes
1answer
115 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 ...
4
votes
3answers
66 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
54 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
189 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 || $1 & disown
exit 1
The command exits perfectly ...
2
votes
2answers
86 views
Are any files loaded when a terminal session terminates?
I know that .profile / .bash_profile are loaded when a terminal session is started, either through local machine or SSH. Are there any files that are loaded/called when the session terminates?
...
3
votes
3answers
195 views
What does exit do in an if block in a shell script?
I have a question regarding unix shell script.
Say if you do exit 1 in inner if: will it exit or will it still execute the outer if? The following is a dummy example.
if [ "$PASSWORD" == ...
1
vote
2answers
149 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 ...
1
vote
2answers
125 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 $? everywhere, but is there an easier way, ...
5
votes
1answer
94 views
How does sh -e interact with &?
I'm using sh (dash) on Ubuntu (lucid) and the manpage has this to say about -e:
-e errexit If not interactive, exit immediately if any untested command fails.
...
4
votes
3answers
546 views
exit shell script from a subshell
Consider this snippet:
stop () {
echo "${1}" 1>&2
exit 1
}
func () {
if false; then
echo "foo"
else
stop "something went wrong"
fi
}
Normally when func ...
2
votes
3answers
208 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
163 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
...
15
votes
1answer
332 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
212 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 ...
5
votes
6answers
3k 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
517 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 ...
3
votes
2answers
968 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
460 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.
9
votes
3answers
643 views
Is it safe to close shell just by clicking “X” or using “ctrl+d”?
Is it safe to close shell just by clicking "X" or using "ctrl+d" while logged in as root with su or is it safer to close it by typing "exit"? Is there any difference (security-wise) at all or is it ...
4
votes
1answer
87 views
Is it the process that cleans itself on termination or the kernel?
Recently I found this in a powerpoint presentation:
When a program is compiled and linked, the linker inserts some extra code in the program. It is this code that calls the main function about the ...
2
votes
3answers
323 views
What is meant with terminating a process normally?
In an examination it is stated:
Give 2 different ways that a process can terminate normally. Describe
the differences.
What is meant with terminate normally?
3
votes
1answer
108 views
Testing equivalence for exit status
Are the following two command lists portably equivalent?
$foo; echo $? #(1)
and
$foo && echo 0 || echo $? #(2)
Postscript
Consider the command exit-status defined so:
#!/bin/sh
exit ...
5
votes
1answer
159 views
Return value of a process and comparison of the number
I have a val.py python script that returns a negative number.
import sys
sys.exit(-1234)
When I run this bash script, I get the value $? as return value of 46 (not -1234).
Even when I tried to ...
4
votes
2answers
99 views
Unable to capture program exit
I started a program written using Node.js and started it using launch pipe into logfile and send it to background.
Half way running the program exited w/o any error both on the console nor the log, I ...
3
votes
2answers
142 views
How to use $? and test to check function?
#!/bin/sh
function checkExit(){
if test "$?" != "0"; then
echo Command $1 exited with abnormal status
exit 1;
else echo $?
fi
}
function echoThenRun () { # echo and then ...
2
votes
2answers
272 views
.DELETE_ON_ERROR behavior with make and pipelines
The .DELETE_ON_ERROR target will tell make to delete a target if a rule fails. But this doesn't work for pipelines, because the exit status value $? holds the value of the last program in the ...
2
votes
2answers
403 views
Removing zombie process from the process table
Can somebody please explain when parent process receives the exit status of a dead child process via wait, who actually reallocates the memory of the child process and removes it from the process ...
5
votes
4answers
394 views
Why can't I get the exit values of a command in this bash script?
So I was writing this little nautilus script for transcoding video into mp3:
#! /bin/bash -x
if [ -z "$1" ]
then
zenity --warning --text="Error - No file selected !"
exit 1
fi
...
19
votes
7answers
4k views
Get exit code of process that's piped to another
I have two processes foo and bar, connected with a pipe:
$ foo | bar
bar always exits 0; I'm interested in the exit code of foo. Is there any way to get at it?
2
votes
2answers
638 views
dhclient exits with status 0 but still no address
I've been trying to find out with the man page and some other sources if the exit status doesn't necessarily mean you achieved an address but I'm thinking I maybe didn't read it correctly. Does anyone ...
7
votes
3answers
952 views
Why should a child of a vfork or fork call _exit() instead of exit()?
From the man page of vfork():
vfork() differs from fork() in that
the parent is suspended until the
child makes a call to execve(2) or
_exit(2). The child shares all memory with its ...
