I need a mechanism to fork child processes and all child processes should connect to a server.but the number of child processes should be limited(for ex:50)
Here's my pseudo, but I cant figure out how to limit the child process number. Should I use a semaphore? or what?
PS: i use Linux.
I don't follow what these are...
this is what my text says...
"When a process is started, a duplicate of that process is created. This new process is called the child and the process that created it is called the parent. The child process then replaces the copy for the code the parent... (1 Reply)
Hello all, I am trying to create n child processes and control them from a parent process; say make child 3 print its pid and then child 5 do the same and some other stuff. Is there a way to accomplishing this after all the child processes are created via a call to fork().
Thank you,
FG (23 Replies)
Hello.
I have a global function name func1() that I am sourcing in from script A. I call the function from script B. Is there a way to find out which script called func1() dynamically so that the func1() can report it in the event there are errors?
Thanks (2 Replies)
Hello,
How many child processes are actually created when running this code ?
#include <signal.h>
#include <stdio.h>
int main () {
int i ;
setpgrp () ;
for (i = 0; i < 10; i++) {
if (fork () == 0) {
if ( i & 1 ) setpgrp () ;
printf ("Child id: %2d, group: %2d\n", getpid(),... (0 Replies)
Hello,
How many child processes are actually created when running this code ?
#include <signal.h>
#include <stdio.h>
int main () {
int i ;
setpgrp () ;
for (i = 0; i < 10; i++) {
if (fork () == 0) {
if ( i & 1 ) setpgrp () ;
printf ("Child id: %2d, group: %2d\n",... (1 Reply)
I have a parent process which will start 36 child process. This I achieved by using the 'for loop'.
In Parent.sh:-
./Child.sh <arg1> <arg2> ... &
If I execute "ps -ef | grep Child.sh", I can see 72 child processes running at the background. I mean I can see the duplicate of each process.
... (2 Replies)
Hi,
I have parent script which is invoking multiple child scripts. I would want to kill all the child processes before the parent
process exit.
> cat ./parent
#!/bin/ksh
while
do
. ./child arg1 &
if ; then
break
fi
done
Is there a way to get the process group id for all the child... (3 Replies)
I am trying to implement the below using Ksh script on a Lx machine.
There is a file(input_file) with 100K records. For each of these records, certain script(process_rec) needs to be called with the record as input. Sequential processing is time-consuming and parallel processing would eat up... (2 Replies)
is there a universal way of getting the children of a particular process? i'm looking for a solution that works across different OSes...linux, aix, sunos, hpux.
i did a search online and i kept finding answers that were specific to Linux..i.e. pstree.
i want to be able to specify a process... (2 Replies)
Discussion started by: SkySmart
2 Replies
LEARN ABOUT HPUX
system
system(3S)system(3S)NAME
system() - issue a shell command
SYNOPSIS DESCRIPTION
executes the command specified by the string pointed to by command. The environment of the executed command is as if a child process were
created using (see fork(2)), and the child process invoked the sh-posix(1) utility via a call to (see exec(2)) as follows:
ignores the and signals, and blocks the signal, while waiting for the command to terminate. If this might cause the application to miss a
signal that would have killed it, the application should examine the return value from and take whatever action is appropriate to the
application if the command terminated due to receipt of a signal.
does not affect the termination status of any child of the calling processes other than the process or processes it itself creates.
does not return until the child process has terminated.
APPLICATION USAGE
If the return value of is not -1, its value can be decoded through the use of the macros described in For convenience, these macros are
also provided in
Note that, while must ignore and and block while waiting for the child to terminate, the handling of signals in the executed command is as
specified by fork(2) and exec(2). For example, if is being caught or is set to when is called, the child is started with handling set to
Ignoring and in the parent process prevents coordination problems (such as two processes reading from the same terminal) when the executed
command ignores or catches one of the signals.
RETURN VALUE
If command is null, returns non-zero.
If command is not null, returns the termination status of the command language interpreter in the format specified by wait(2). The termi-
nation status of the command language interpreter is as specified for sh-posix(1), except that if some error prevents the command language
interpreter from executing after the child process is created, the return value from is as if the command language interpreter had termi-
nated using If a child process cannot be created, or if the termination status for the command language interpreter cannot be obtained,
returns -1 and sets to indicate the error.
DIAGNOSTICS
forks to create a child process which, in turn, in order to execute string. If the fork fails, returns -1 and sets If the exec fails,
returns the status value returned by (see wait(2)) for a process that terminates with a call of
ERRORS
If errors are encountered, sets values as described by fork(2).
FILES SEE ALSO sh(1), fork(2), exec(2), wait(2), thread_safety(5).
STANDARDS CONFORMANCE system(3S)