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Questions tagged [job-control]

69 questions
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Why job-foregrounding of gdb is losing it?

I have a script that starts a server, then bunch of clients, then I need to foreground the server back, so I could test something. For some reason the server quickly quits, as if per some signal, so I wanted to inspect it with gdb. The problem is,…
Hi-Angel
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Why bash puts process started via '&' to foreground?

When a process is started with "&", bash places the new process to foreground group for a short time and then places itself back to foreground group. As far as I know, when we run any external command without the "&" background operator, the shell…
Igor Liferenko
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Using distributed cache on output of first hadoop job

I am currently running two jobs such that job2 is dependent on job1. I plan to use output of job1 and pass it as distributed cache in job2. This will be used as reference in job2 to process another set of data. I have written load functions in the 2…
S Kr
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How can I implement shell job control basics in Python?

There is basic job control like suspend, resume, interrupt, and background implemented by most modern shells. How can I make a shell sensitive to ^Z, fg, ^C, and bg (as they appear in bash), in Python? Or what should I be reading?
Christos Hayward
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Bash job control - Can you terminate second command on list without terminating first?

If I issue this at a bash prompt: $ cmd_1 ; cmd_2 cmd_1 is in the foreground. Can I prevent cmd_2 from running without halting cmd_1? I have until cmd_1 finishes, at which time cmd_2 will start, and then it is too late. I don't think this is…
ChrisSM
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VSCode integrated terminal will not allow job control for some reason

I have a problem with my terminal where it shows the following whenever I start a new instance. bash: cannot set terminal process group (1502): Inappropriate ioctl for device bash: no job control in this shell The terminal runs fine but the…
Metwesh
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How to switch terminal to new child process of process launched with NSTask?

I made a pseudo terminal with method described here: http://lists.apple.com/archives/student-dev/2005/Mar/msg00019.html The terminal itself worked well. Anyway the problem is terminal cannot being switched to child process. For an example, I…
eonil
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Why is SIGTTOU signal being delivered to the process?

I was trying to build an interactive shell which runs within the ZSH shell. Any command would execute in it's own process group (thus I use tcsetpgrp call to make it the foreground process group, and once the command is executed the the interactive…
ANIRUDH BUVANESH
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Programmatically start a series of processes w\ job control

I have a series of 7 processes required to run a complex web app that I develop on. I typically start these processes manually like this: job &>/tmp/term.tail & term.tail is a fifo pipe I leave tail running on to see the output of these processes…
TJ Singleton
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Why is bash breaking MPI job control loop

I'm attempting to use a simple bash script to sequentially run a batch of MPI jobs. This script works perfectly when running serial code (I am using Fortran 90), but for some reason bash breaks out of the loop when I attempt to execute MPI code. I…
Clint Jordan
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shell, job control for receiving end of the pipe

I don't understood, why I can't run some process ("cat" in this example) in background and later make it foreground: $ dash $ f() { cat /dev/stdout & sleep 1; fg ; } $ sleep 2 | f dash: 1: fg: job (null) not created under job…
Kirill Frolov
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How do I make a background process block for input a la the shell's `bg` command?

I am implementing my own fragment of code for a security control purpose. It normally runs in the background but on a timeout needs to take over the current terminal, display a message, collect user input, and react to the user input. Waiting for…
Joshua
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Background and suspended processes - Implementing a Job Control Shell in C

I'm implementing a Job Control Shell in C in Linux as a project for a Operating Systems-related subject. I have a main() function that does child process management, helped with a linked list as shown here in which background and suspended jobs…
user9764916
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How to save SLURM job configuration?

suppose I run a slurm job with the following configuration: #!/bin/bash #SBATCH --nodes=1 # set the number of nodes #SBATCH --ntasks=1 # Run a single task #SBATCH…
Maryam Hnr
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How to temporarily stop Resque Queues from processing new jobs?

Is there a way to tell all workers to stop processing any new jobs for a particular queue (or all queues)? We have an occasional issue where the systems that are needed become unavailable (power down, hardware failures, etc.), and it would be…
crispy
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