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1. Shell Programming and Scripting
Hi everyone
i am very new to linux , working on bash shell.
I am trying to solve the given problem
1. Create a process and then create children using fork
2. Check the Status of the application for successful running.
3. Kill all the process(threads) except parent and first child... (2 Replies)
Discussion started by: vizz_k
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2. Emergency UNIX and Linux Support
Hello, everyone.
Here's a program:
pid_t pid = fork();
if (0 == pid) // child process
{
execvp ...;
}
I send a signal (such as SIGINT) to the parent process, the child process receive the signal as well as the parent process.
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3. Shell Programming and Scripting
!/bin/sh
pid=$(ps -Aj | grep MSTRSvr | grep -v grep | awk '{print $1}')
sid=$(ps -Aj | grep MSTRSvr | grep -v grep | awk '{print $3}')
ps -s "$sid"
I am not able to get the desired output it says process list error
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4. Shell Programming and Scripting
Hey all, I need to launch a script from within 2 other scripts that can run independently of the two parent scripts... Im having a hard time doing this, if anyone knows how please let me know.
More detail.
ScriptA (bash), ScriptB (ksh), ScriptC (bash)
ScriptA, launches ScriptB
ScirptB,... (7 Replies)
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5. Shell Programming and Scripting
Hi All,
I have two ksh script. 1st script calls the 2nd script and the second script calls an 'C' program.
I want 1st script to wait until the 'C' program completes.
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6. Shell Programming and Scripting
I have a bash script that has been used for months here at work for doing an SSH into other machines both Linux and Solaris and running a script on the remote machine. Recently I have started to noticed that things are being left being on the maching doing the SSH.
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tivoli ... (1 Reply)
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7. UNIX for Advanced & Expert Users
hi,
I want my program to fork a new process and then I want to kill the parent process. The parent program before dying will issue a SIGTERM to all its childs. Which eventually kills all Children.
I cant handle the SIGTERM at the child level.:(
What I was thinking of was the Parent... (3 Replies)
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8. UNIX for Dummies Questions & Answers
Hey, first time poster and a new UNIX user here.
My question is regarding the forking process. I logged in to tty1, and typed the command ls -1 and hit enter. How can i tell that the ls -1 command ran in a subshell?
Thanks. (0 Replies)
Discussion started by: Vitamin254
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9. Programming
#include <stdio.h>
#include <sys/types.h>
#include <unistd.h>
int main()
{
pid_t pID;
int i;
for (i = 0; i < 3; i++)
{
pID = fork ();
if (pID == 0)
{
printf ("Value of i --> %d... (2 Replies)
Discussion started by: kymthasneem
2 Replies
10. Programming
Hi
I'm currently working with C on UNIX (HPUX) and need to be able to fork a seperate Java process from within a running C process.
I can run the following code from the command line via a script but am having difficulty getting it to work from within the code.
I am trying to use execl. Is... (4 Replies)
Discussion started by: themezzaman
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EVCHILD(3) 1 EVCHILD(3)
The EvChild class
INTRODUCTION
EvChild watchers trigger when the process receives a SIGCHLD in response to some child status changes (most typically when a child dies or
exits). It is permissible to install an EvChild watcher after the child has been forked(which implies it might have already exited), as
long as the event loop isn't entered(or is continued from a watcher), i.e. forking and then immediately registering a watcher for the child
is fine, but forking and registering a watcher a few event loop iterations later or in the next callback invocation is not.
It is allowed to register EvChild watchers in the default loop only.
CLASS SYNOPSIS
EvChild
EvChildextends
EvWatcher
Properties
o public$pid
o public$rpid
o public$rstatus
Inherited properties
o public$is_active
o public$data
o public$is_pending
o public$priority
Methods
o public EvChild::__construct NULL (int $pid, bool $trace, callable $callback, [mixed $data], [int $priority])
o finalpublicstatic object EvChild::createStopped (int $pid, bool $trace, callable $callback, [mixed $data], [int $priority])
o public void EvChild::set (int $pid, bool $trace)
Inherited methods
o public int EvWatcher::clear (void )
o abstractpublic EvWatcher::__construct (void )
o public void EvWatcher::feed (int $revents)
o public EvLoop EvWatcher::getLoop (void )
o public void EvWatcher::invoke (int $revents)
o public bool EvWatcher::keepalive ([bool $value])
o public void EvWatcher::setCallback (callable $callback)
o public void EvWatcher::start (void )
o public void EvWatcher::stop (void )
PROPERTIES
o $pid
- Readonly . The process ID this watcher watches out for, or 0 , meaning any process ID.
o $rpid
- Readonly .The process ID that detected a status change.
o $rstatus
- Readonly . The process exit status caused by $rpid .
PHP Documentation Group EVCHILD(3)