What signal is sent when you close a bash terminal to the programs it was runningWhy does closing terminal emulator window terminate a bash process with SIGHUP trap changed not to terminate?Control which process gets cancelled by Ctrl+CProgram is not launched in function that is called by a signal trapCatching a LXDE Logout with bashsigint not being propagated to background child processWays to make a process survive its parent shell's exiting?What terminal related signals are sent to the child processes of the shell directly and what signals indirectly via the shell process?trapping HUP/SIGHUP is not working in bash scriptProcess continues to run after receiving uncaught SIGINT (Ctrl-C from terminal)Process started by script does not receive SIGINTWhy does closing terminal emulator window terminate a bash process with SIGHUP trap changed not to terminate?
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What signal is sent when you close a bash terminal to the programs it was running
Why does closing terminal emulator window terminate a bash process with SIGHUP trap changed not to terminate?Control which process gets cancelled by Ctrl+CProgram is not launched in function that is called by a signal trapCatching a LXDE Logout with bashsigint not being propagated to background child processWays to make a process survive its parent shell's exiting?What terminal related signals are sent to the child processes of the shell directly and what signals indirectly via the shell process?trapping HUP/SIGHUP is not working in bash scriptProcess continues to run after receiving uncaught SIGINT (Ctrl-C from terminal)Process started by script does not receive SIGINTWhy does closing terminal emulator window terminate a bash process with SIGHUP trap changed not to terminate?
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I have a Bash script that launches a Python program. The Bash script handles SIGINT, SIGTERM and SIGHUP signals to do a cleanup operation. I noticed that when I close the process in a tab in LXTerminal, the cleanup process happens. But when I close the entire terminal window, the cleanup process closes.
What am I missing to have the cleanup process to happen?
bash signals
edited Jan 6 '17 at 13:24
janos
7,31722548
asked Oct 7 '15 at 19:38
user3346931user3346931
10017
bumped to the homepage by Community♦ 2 days ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
add a comment |
I have a Bash script that launches a Python program. The Bash script handles SIGINT, SIGTERM and SIGHUP signals to do a cleanup operation. I noticed that when I close the process in a tab in LXTerminal, the cleanup process happens. But when I close the entire terminal window, the cleanup process closes.
What am I missing to have the cleanup process to happen?
bash signals
edited Jan 6 '17 at 13:24
janos
7,31722548
asked Oct 7 '15 at 19:38
user3346931user3346931
10017
bumped to the homepage by Community♦ 2 days ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
Have you tried usingstrace?
– Wildcard
Oct 8 '15 at 1:32
2
OP says the script handlesSIGHUP; howeverSIGHUPis what I see when testing this. Lacking a script to demonstrate the problem, there's nothing to test.
– Thomas Dickey
Oct 16 '16 at 20:21
The process is probably "closing" because it gets a I/O error when still trying to read or write to the terminal after receiving the SIGHUP informing it that the terminal has been torn up and is no longer usable.
– mosvy
2 days ago
also see this unix.stackexchange.com/questions/491626/…
– mosvy
2 days ago
add a comment |
I have a Bash script that launches a Python program. The Bash script handles SIGINT, SIGTERM and SIGHUP signals to do a cleanup operation. I noticed that when I close the process in a tab in LXTerminal, the cleanup process happens. But when I close the entire terminal window, the cleanup process closes.
What am I missing to have the cleanup process to happen?
bash signals
edited Jan 6 '17 at 13:24
janos
7,31722548
asked Oct 7 '15 at 19:38
user3346931user3346931
10017
I have a Bash script that launches a Python program. The Bash script handles SIGINT, SIGTERM and SIGHUP signals to do a cleanup operation. I noticed that when I close the process in a tab in LXTerminal, the cleanup process happens. But when I close the entire terminal window, the cleanup process closes.
What am I missing to have the cleanup process to happen?
bash signals
bash signals
edited Jan 6 '17 at 13:24
janos
7,31722548
asked Oct 7 '15 at 19:38
user3346931user3346931
10017
edited Jan 6 '17 at 13:24
janos
7,31722548
asked Oct 7 '15 at 19:38
user3346931user3346931
10017
edited Jan 6 '17 at 13:24
janos
7,31722548
edited Jan 6 '17 at 13:24
janos
7,31722548
edited Jan 6 '17 at 13:24
janos
7,31722548
7,31722548
asked Oct 7 '15 at 19:38
user3346931user3346931
10017
asked Oct 7 '15 at 19:38
user3346931user3346931
10017
asked Oct 7 '15 at 19:38
user3346931user3346931
10017
10017
bumped to the homepage by Community♦ 2 days ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
bumped to the homepage by Community♦ 2 days ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
Have you tried usingstrace?
– Wildcard
Oct 8 '15 at 1:32
2
OP says the script handlesSIGHUP; howeverSIGHUPis what I see when testing this. Lacking a script to demonstrate the problem, there's nothing to test.
– Thomas Dickey
Oct 16 '16 at 20:21
The process is probably "closing" because it gets a I/O error when still trying to read or write to the terminal after receiving the SIGHUP informing it that the terminal has been torn up and is no longer usable.
– mosvy
2 days ago
also see this unix.stackexchange.com/questions/491626/…
– mosvy
2 days ago
add a comment |
Have you tried usingstrace?
– Wildcard
Oct 8 '15 at 1:32
2
OP says the script handlesSIGHUP; howeverSIGHUPis what I see when testing this. Lacking a script to demonstrate the problem, there's nothing to test.
– Thomas Dickey
Oct 16 '16 at 20:21
The process is probably "closing" because it gets a I/O error when still trying to read or write to the terminal after receiving the SIGHUP informing it that the terminal has been torn up and is no longer usable.
– mosvy
2 days ago
also see this unix.stackexchange.com/questions/491626/…
– mosvy
2 days ago
Have you tried using
strace?– Wildcard
Oct 8 '15 at 1:32
Have you tried using
strace?– Wildcard
Oct 8 '15 at 1:32
2
2
OP says the script handles
SIGHUP; however SIGHUP is what I see when testing this. Lacking a script to demonstrate the problem, there's nothing to test.– Thomas Dickey
Oct 16 '16 at 20:21
OP says the script handles
SIGHUP; however SIGHUP is what I see when testing this. Lacking a script to demonstrate the problem, there's nothing to test.– Thomas Dickey
Oct 16 '16 at 20:21
The process is probably "closing" because it gets a I/O error when still trying to read or write to the terminal after receiving the SIGHUP informing it that the terminal has been torn up and is no longer usable.
– mosvy
2 days ago
The process is probably "closing" because it gets a I/O error when still trying to read or write to the terminal after receiving the SIGHUP informing it that the terminal has been torn up and is no longer usable.
– mosvy
2 days ago
also see this unix.stackexchange.com/questions/491626/…
– mosvy
2 days ago
also see this unix.stackexchange.com/questions/491626/…
– mosvy
2 days ago
add a comment |
1 Answer
1
active
oldest
votes
Here's a script that generates a script that will try to catch all signals. The script it generates (sigcatcher.sh) outputs the name of the caught signal before exiting.
#!/bin/sh
# generate a shell function for each and every available signal.
/bin/kill -l | tr ' ' 'n' |
while read signal; do
cat <<END_OF_FUNCTION
handle_$signal ()
echo "Caught $signal"
exit
trap 'handle_$signal' $signal
END_OF_FUNCTION
done >sigcatcher.sh
echo 'echo "$$"; sleep 600' >>sigcatcher.sh
On my system (OpenBSD), /bin/kill -l generates a list of available signals on one line, that's why the tr is there to break it up.
The generated script will look something like this:
handle_HUP ()
echo "Caught HUP"
exit
trap 'handle_HUP' HUP
handle_INT ()
echo "Caught INT"
exit
trap 'handle_INT' INT
(etc.)
And it will be finished off with
echo "$$"; sleep 600
It outputs its PID and sleeps for 10 minutes.
You run it like this:
$ sh ./sigcatcher.sh >sigcatcher.out
Then you close the window, and then you inspect sigcatcher.out.
I don't run X Windows, but when I kill the tmux pane that this script is running in, I get "Caught HUP" in the output file.
answered Jan 6 '17 at 13:57
Kusalananda♦Kusalananda
140k17261435
add a comment |
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1 Answer
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1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
Here's a script that generates a script that will try to catch all signals. The script it generates (sigcatcher.sh) outputs the name of the caught signal before exiting.
#!/bin/sh
# generate a shell function for each and every available signal.
/bin/kill -l | tr ' ' 'n' |
while read signal; do
cat <<END_OF_FUNCTION
handle_$signal ()
echo "Caught $signal"
exit
trap 'handle_$signal' $signal
END_OF_FUNCTION
done >sigcatcher.sh
echo 'echo "$$"; sleep 600' >>sigcatcher.sh
On my system (OpenBSD), /bin/kill -l generates a list of available signals on one line, that's why the tr is there to break it up.
The generated script will look something like this:
handle_HUP ()
echo "Caught HUP"
exit
trap 'handle_HUP' HUP
handle_INT ()
echo "Caught INT"
exit
trap 'handle_INT' INT
(etc.)
And it will be finished off with
echo "$$"; sleep 600
It outputs its PID and sleeps for 10 minutes.
You run it like this:
$ sh ./sigcatcher.sh >sigcatcher.out
Then you close the window, and then you inspect sigcatcher.out.
I don't run X Windows, but when I kill the tmux pane that this script is running in, I get "Caught HUP" in the output file.
answered Jan 6 '17 at 13:57
Kusalananda♦Kusalananda
140k17261435
add a comment |
Here's a script that generates a script that will try to catch all signals. The script it generates (sigcatcher.sh) outputs the name of the caught signal before exiting.
#!/bin/sh
# generate a shell function for each and every available signal.
/bin/kill -l | tr ' ' 'n' |
while read signal; do
cat <<END_OF_FUNCTION
handle_$signal ()
echo "Caught $signal"
exit
trap 'handle_$signal' $signal
END_OF_FUNCTION
done >sigcatcher.sh
echo 'echo "$$"; sleep 600' >>sigcatcher.sh
On my system (OpenBSD), /bin/kill -l generates a list of available signals on one line, that's why the tr is there to break it up.
The generated script will look something like this:
handle_HUP ()
echo "Caught HUP"
exit
trap 'handle_HUP' HUP
handle_INT ()
echo "Caught INT"
exit
trap 'handle_INT' INT
(etc.)
And it will be finished off with
echo "$$"; sleep 600
It outputs its PID and sleeps for 10 minutes.
You run it like this:
$ sh ./sigcatcher.sh >sigcatcher.out
Then you close the window, and then you inspect sigcatcher.out.
I don't run X Windows, but when I kill the tmux pane that this script is running in, I get "Caught HUP" in the output file.
answered Jan 6 '17 at 13:57
Kusalananda♦Kusalananda
140k17261435
add a comment |
Here's a script that generates a script that will try to catch all signals. The script it generates (sigcatcher.sh) outputs the name of the caught signal before exiting.
#!/bin/sh
# generate a shell function for each and every available signal.
/bin/kill -l | tr ' ' 'n' |
while read signal; do
cat <<END_OF_FUNCTION
handle_$signal ()
echo "Caught $signal"
exit
trap 'handle_$signal' $signal
END_OF_FUNCTION
done >sigcatcher.sh
echo 'echo "$$"; sleep 600' >>sigcatcher.sh
On my system (OpenBSD), /bin/kill -l generates a list of available signals on one line, that's why the tr is there to break it up.
The generated script will look something like this:
handle_HUP ()
echo "Caught HUP"
exit
trap 'handle_HUP' HUP
handle_INT ()
echo "Caught INT"
exit
trap 'handle_INT' INT
(etc.)
And it will be finished off with
echo "$$"; sleep 600
It outputs its PID and sleeps for 10 minutes.
You run it like this:
$ sh ./sigcatcher.sh >sigcatcher.out
Then you close the window, and then you inspect sigcatcher.out.
I don't run X Windows, but when I kill the tmux pane that this script is running in, I get "Caught HUP" in the output file.
answered Jan 6 '17 at 13:57
Kusalananda♦Kusalananda
140k17261435
Here's a script that generates a script that will try to catch all signals. The script it generates (sigcatcher.sh) outputs the name of the caught signal before exiting.
#!/bin/sh
# generate a shell function for each and every available signal.
/bin/kill -l | tr ' ' 'n' |
while read signal; do
cat <<END_OF_FUNCTION
handle_$signal ()
echo "Caught $signal"
exit
trap 'handle_$signal' $signal
END_OF_FUNCTION
done >sigcatcher.sh
echo 'echo "$$"; sleep 600' >>sigcatcher.sh
On my system (OpenBSD), /bin/kill -l generates a list of available signals on one line, that's why the tr is there to break it up.
The generated script will look something like this:
handle_HUP ()
echo "Caught HUP"
exit
trap 'handle_HUP' HUP
handle_INT ()
echo "Caught INT"
exit
trap 'handle_INT' INT
(etc.)
And it will be finished off with
echo "$$"; sleep 600
It outputs its PID and sleeps for 10 minutes.
You run it like this:
$ sh ./sigcatcher.sh >sigcatcher.out
Then you close the window, and then you inspect sigcatcher.out.
I don't run X Windows, but when I kill the tmux pane that this script is running in, I get "Caught HUP" in the output file.
answered Jan 6 '17 at 13:57
Kusalananda♦Kusalananda
140k17261435
answered Jan 6 '17 at 13:57
Kusalananda♦Kusalananda
140k17261435
answered Jan 6 '17 at 13:57
Kusalananda♦Kusalananda
140k17261435
answered Jan 6 '17 at 13:57
Kusalananda♦Kusalananda
140k17261435
140k17261435
add a comment |
add a comment |
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Have you tried using
strace?– Wildcard
Oct 8 '15 at 1:32
2
OP says the script handles
SIGHUP; howeverSIGHUPis what I see when testing this. Lacking a script to demonstrate the problem, there's nothing to test.– Thomas Dickey
Oct 16 '16 at 20:21
The process is probably "closing" because it gets a I/O error when still trying to read or write to the terminal after receiving the SIGHUP informing it that the terminal has been torn up and is no longer usable.
– mosvy
2 days ago
also see this unix.stackexchange.com/questions/491626/…
– mosvy
2 days ago