In my C++ program I have a parent process which forks 5 children processes.The processes do a job and then they have to do some sort of sleeping(not terminate) until the parent wakes them up again.There might be 1,2,5 or even 0 processes awake at any moment.The thing is that in the parent process there's the
for every process.But this refers to the termination of each process.How can a process do a job and then "sleep" instead of terminate.I guess with some sort of a signal but I have absolutely no idea how this can be achieved.
Any ideas?
I believe i have most of samba configured right but i get this error each time time try to run it. I was given suggestion that i touch the file, i did, but i still cannot rid myself of this error.
Any suggestions (2 Replies)
Hi,
We have a text file which has the following data.
ISA~00~ ~00~ ~ZZ~VISTN ~ZZ~U1CAD ~051227~183
7~U~00200~000011258~0~P~<
GS~FA~EE05J~U1CAD~051227~1831~000011258~X~002002
ST~997~0001
AK1~SH~247
AK2~856~2470001
AK5~A
AK2~856~2470002
AK5~A... (3 Replies)
I have successfully installed RedHat 8.0 onto a Dell PowerEdge SC1425 today. This server has two SATA hard drives, and an IDE DVD-ROM drive.
Using the following kernel parameters, i successfully installed across both hard drives from CD:
ide0=0x1f0,0x3f6,14 vga=791 resolution=1024x768 expert... (5 Replies)
:cool:
I need to execute a shell script to do the following:
cat a file
run two back ground processes using the first two values from the file
wait till those background processes finish
run two more background processes using the next two values from the file
wait till those background... (1 Reply)
Did not use 'wait' yet.
How I understand by now the wait works only for child processes, started background.
Is there any other way to watch completion of any, not related process (at least, a process, owned by the same user?)
I need to start a background process, witch will be waiting... (2 Replies)
Hi,
I am facing a strange issue,
when i call a script from my while loop in background it doesnt go in background, despite the wait i put below the whil loop it goes forward even before the process put in background is completed.
cat abc.txt | while read -u4 line
do
#if line contains #... (2 Replies)
I'm extremely new to shell scripting so I apologize for the crudeness of my descriptions. I am editing a script that will write files (e.g. Job0_A.com, Job1_A.com, etc.) and then run them through a program called gaussian (computational chemistry program). The script will then take the output files... (10 Replies)
Dear Team
I am using DB2 v10 z/os database . Need expert guidance to figure out best way to track table activities ( Ex Delete, Insert,Update )
Scenario
We have a table which is critical and many developer/testing team access on daily basis . We had instance where some deleted... (1 Reply)
How to see the status of all the ftp put & get files logs and curent ftp transfer status if any active ftp running in the background ? (2 Replies)
Discussion started by: i4ismail
2 Replies
LEARN ABOUT OPENDARWIN
_exit
EXIT(2) BSD System Calls Manual EXIT(2)NAME
_exit -- terminate the calling process
SYNOPSIS
#include <unistd.h>
void
_exit(int status);
DESCRIPTION
The _exit() function terminates a process with the following consequences:
o All of the descriptors open in the calling process are closed. This may entail delays, for example, waiting for output to drain; a
process in this state may not be killed, as it is already dying.
o If the parent process of the calling process has an outstanding wait call or catches the SIGCHLD signal, it is notified of the calling
process's termination and the status is set as defined by wait(2).
o The parent process-ID of all of the calling process's existing child processes are set to 1; the initialization process (see the DEFINI-
TIONS section of intro(2)) inherits each of these processes.
o If the termination of the process causes any process group to become orphaned (usually because the parents of all members of the group
have now exited; see ``orphaned process group'' in intro(2)), and if any member of the orphaned group is stopped, the SIGHUP signal and
the SIGCONT signal are sent to all members of the newly-orphaned process group.
o If the process is a controlling process (see intro(2)), the SIGHUP signal is sent to the foreground process group of the controlling ter-
minal, and all current access to the controlling terminal is revoked.
Most C programs call the library routine exit(3), which flushes buffers, closes streams, unlinks temporary files, etc., before calling
_exit().
RETURN VALUE
_exit() can never return.
SEE ALSO fork(2), sigaction(2), wait(2), exit(3)STANDARDS
The _exit function is defined by IEEE Std 1003.1-1988 (``POSIX.1'').
4th Berkeley Distribution June 4, 1993 4th Berkeley Distribution