Questions tagged [sighup]
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15 questions
0 votes
1 answer
71 views
When does a hup signal affect the parent process? [duplicate]
If I run ./script.sh &, where script is the following: #!/bin/bash echo "hello" sleep 30 echo "hello again" sleep 30 touch /root/foo.txt Then I use ps au, to identify the "...
2 votes
0 answers
384 views
xargs nano leads to Received SIGHUP or SIGTERM while xargs less is OK
Scenario: $ cat t0.txt t1.txt $ cat t1.txt xxx $ sed -n 1p t0.txt | xargs less # OK $ sed -n 1p t0.txt | xargs nano Received SIGHUP or SIGTERM dvl-linux64 $ nano --version GNU nano, version 2.5.3 ...
- 757
2 votes
1 answer
2k views
Why does huponexit not work in the following?
Bash manual says If the huponexit shell option has been set with shopt (see Section 4.3.2 [The Shopt Builtin], page 62), Bash sends a SIGHUP to all jobs when an interactive login shell exits. Why ...
- 107k
-2 votes
1 answer
705 views
Why doesn't the Linux kernel send SIGCONT first and then SIGHUP to a newly orphaned process group containing a stopped process?
APUE says Since the process group is orphaned when the parent terminates, and the process group contains a stopped process, POSIX.1 requires that every process in the newly orphaned ...
- 107k
1 vote
1 answer
711 views
How can I stop a child process of a subshell (as per SIGSTOP) before the subshell exits?
In bash, when running ( sleep 123 &), the sleep 123 process will continue running, when the subshell exits. How can I stop the sleep 123 process before its parent subshell exits? I'm trying to ...
- 107k
3 votes
1 answer
1k views
Is SIGHUP sent to this orphaned process, and why doesn't it terminate?
In The Linux Programming Interface: SIGHUP is generated when a process group becomes orphaned. In an interactive bash process, $ ( sleep 123 &) will first forks a subshell, and the ...
- 107k
1 vote
1 answer
591 views
Who sends SIGHUP to the controlling process of the pseudoterminal when the terminal emulator terminates?
When a terminal is disconnected, the OS kernel sends SIGHUP to the controlling process of the terminal. When a terminal emulator terminates, who sends SIGHUP to the controlling process of the ...
- 107k
0 votes
0 answers
843 views
trapping HUP/SIGHUP is not working in bash script
I have this bash script: https://gist.github.com/ORESoftware/06dbb26a48d2ddf48a5a2166834e0836 when I call ql_acquire_lock in a shell, if I can call mkdir on a directory, then I acquire that lock. ...
- 10.9k