08-23-2008
You might also want to check the manual pages for setpgid() if you really want to dissociate the forked process from the parent.
10 More Discussions You Might Find Interesting
1. UNIX for Advanced & Expert Users
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
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
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
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
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
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
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
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
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
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
LEARN ABOUT NETBSD
setpgrp
SETPGID(2) BSD System Calls Manual SETPGID(2)
NAME
setpgid, setpgrp -- set process group
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <unistd.h>
int
setpgid(pid_t pid, pid_t pgrp);
int
setpgrp(pid_t pid, pid_t pgrp);
DESCRIPTION
setpgid() sets the process group of the specified process pid to the specified pgrp. If pid is zero, then the call applies to the current
process. If pgrp is zero, then the process id of the process specified by pid is used instead.
If the invoker is not the super-user, then the affected process must have the same effective user-id as the invoker or be a descendant of the
invoking process.
RETURN VALUES
setpgid() returns 0 when the operation was successful. If the request failed, -1 is returned and the global variable errno indicates the
reason.
ERRORS
setpgid() will fail and the process group will not be altered if:
[EACCES] The value of the pid argument matches the process ID of a child process of the calling process, and the child process has
successfully executed one of the exec functions.
[EINVAL] The value of the pgrp argument is less than zero.
[EPERM] The effective user ID of the requested process is different from that of the caller and the process is not a descendant of
the calling process.
[ESRCH] The value of the pid argument does not match the process ID of the calling process or of a child process of the calling
process.
SEE ALSO
getpgrp(2)
STANDARDS
The setpgid() function conforms to ISO/IEC 9945-1:1990 (``POSIX.1'').
COMPATIBILITY
setpgrp() is identical to setpgid(), and is retained for calling convention compatibility with historical versions of BSD.
BSD
December 18, 2003 BSD