Sponsored Content
Operating Systems Linux Question about background processes Post 302226929 by otheus on Wednesday 20th of August 2008 07:50:14 AM
Old 08-20-2008
PHP

Your question was a bit vague, so forgive me if this does not answer your question.

Usually, the background process does not (not should not) have a controlling TTY. If it does, it is because the parent process did not close all TTY-open file descriptors (such as stderr and stdin) after the fork() and before the exec().
 

10 More Discussions You Might Find Interesting

1. UNIX for Advanced & Expert Users

Background processes

How do you capture the return code from a background process? I am dumping data to a fifo and then processing it in a c program. I need to know that the sql finished successfully to ensure no missing data. Thanks. ex. sqlplus user/password < get_data.sql > data_fifo.txt & bin/process_data... (2 Replies)
Discussion started by: korndog
2 Replies

2. Shell Programming and Scripting

Running two processes in background

hi there, here's what i need in my korn-shell: ... begin korn-shell script ... nohup process_A.ksh ; nohup process_B.ksh & ... "other stuff" ... end lorn-shell script in plain english i want process A and process B to run in the background so that the script can continue doing... (6 Replies)
Discussion started by: jacob_gs
6 Replies

3. Programming

Background processes in a dummy shell...

Hey guys, I am writing a very simple dummy shell in C++ and I am having trouble getting a process to run in the background. First of all, the shell has to recognize when I input a "&" at the end of the command, then it has to stick it in the background of the shell. I understand that if I want... (6 Replies)
Discussion started by: icer
6 Replies

4. SuSE

oracle background processes

I have installed oracle 10g on suse sles9. I do not see oracle background processes. ps -ef|grep ora_ gives me environment variables junk. ps -ef|grep smon does not show anything however database is up and running. Any idea how to tweak that? (1 Reply)
Discussion started by: vijayasawant
1 Replies

5. Shell Programming and Scripting

Keep a certain number of background processes running

I've got a bit of code I'm trying to work on... What i want to happen is ... at all times have four parallel mysql dump and imports running. I found the follow code snippet on the forum and modified it to work by starting four concurrent processes but it waits until all four are done before... (7 Replies)
Discussion started by: dgob123
7 Replies

6. UNIX for Dummies Questions & Answers

Disadvantage of background processes

Hi, Inorder to improve the performance, I am trying to execute my command as a background process.. For eg: To zip large numbers of files present in a directory instead of using a single process, i do follow the below method: gunzip -c > / &... (3 Replies)
Discussion started by: unni.raj
3 Replies

7. Solaris

About running processes in background

Hi, I need to establish a procedure that will start an application in background each time my remote Solaris server is (re)started. This would be a kind of daemon. I am no sysadmin expert, so I am looking for pointers. How should I proceed? What are the main steps? Thanks, JVerstry (9 Replies)
Discussion started by: JVerstry
9 Replies

8. Shell Programming and Scripting

Background Processes

Ok guys so I have my first dummy shell almost done except for one tiny part: I do not know how to run a process in the background, from the code! I already know how to do that in a normal shell: $ program & However, no clue when it comes to how to program that thing. :eek: A very... (2 Replies)
Discussion started by: Across
2 Replies

9. Shell Programming and Scripting

Need help on background processes

Hi, I have a schell script parent.ksh from which I am calling three background processes a.ksh,b.ksh and c.ksh. Once these three processes completes the next step in parent.ksh should execute. How to achieve this? Please help me.... Thanks... (1 Reply)
Discussion started by: ravinunna
1 Replies

10. UNIX for Advanced & Expert Users

List all background processes

How do I list the process in a Unix based system which are running in background? The following are options that I'm aware of, but they may not be appropiate. a. using ps -ef , and getting records of processes for which STATUS='S'(uninterruptible sleep) b. using jobs -l, and filtering... (5 Replies)
Discussion started by: kumarjt
5 Replies
killall(8)						      System Manager's Manual							killall(8)

NAME
killall - Terminates all processes started by the user, except the calling process SYNOPSIS
/usr/sbin/killall [- | [-]signal_name | -signal_number] /usr/sbin/killall -l FLAGS
The hyphen character (without an argument) sends a SIGTERM signal initially and then sends a SIGKILL signal to all processes that survive for 30 seconds after receipt of the first signal. This gives processes that catch the SIGTERM signal an opportunity to clean up. A signal name, optionally preceded by a hyphen, sends the specified signal to processes. The hyphen character (with a signal number argument) sends the specified signal, either a name, stripped of the SIG prefix (such as KILL), or a number (such as 9). For information about signal names and numbers, see the signal() system call. In the System V habitat, the optional signal number does not have to be preceded with a hyphen (-). Lists signal names in numerical order (as given in the /usr/include/signal.h file), stripped of the common SIG prefix. DESCRIPTION
This command provides a convenient means of killing all processes created by the shell that you control. When started by the superuser, the killall command kills all processes that can be terminated, except those processes that started it, the kernel processes, and processes 0 and 1 (init). Security Configuration This command is modified in all security configurations of the system. EXAMPLES
To stop all background processes that have started, enter: killall This sends all background processes signal 9 (the kill signal, also called SIGKILL). To stop all background processes, giving them a chance to clean up, enter: killall - This sends signal 15 (SIGTERM), waits 30 seconds, and then sends signal 9 (SIGKILL). To send a specific signal to the background processes, enter: killall -2 This sends signal 2 (SIGINT) to the background processes. To list the signal names in numerical order, stripped of the SIG prefix, enter: killall -l This displays a list of signals, which may vary from system to system. FILES
Specifies the command path RELATED INFORMATION
Calls: kill(2), sigaction(2), signal(2) delim off killall(8)
All times are GMT -4. The time now is 07:43 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy