Thread: Fork() ... chuild still exist ..

Hi

i need to create 5 children ... and each must have open one end of five pipes ...

so i create a this ...

Code:

#include <stdio.h>#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/wait.h>

int g_fd[5][2];

int main () 
{
    // Create Pipes
    for(int i = 0; i<5; i++)
    {
        pipe(g_fd[i]);
    }
    // Create Children
    for(int j = 0; j<5; j++)
    {
        if(fork()==0)
        {
            //CloseAllPipies
            for(int i=0; i<5; i++)
            {
                close(g_fd[i][0]);
                printf("Process %d Pipe %d End 0 is CLOSE\n", j, i);
                if(j==i)
                {
                    printf("Process %d Pipe %d End 0 is OPEN\n", j, i);
                    //Write In child
                }
                else
                {
                    printf("Process %d Pipe %d End 1 is CLOSE\n", j, i);
                    close(g_fd[i][1]);
                }
            }
        }
        else //end Parent
        {
            return 0;
        } 
    }
    printf("Some out ... \n");
    return(0);
}

now my output is:

Code:

Process 0 Pipe 0 End 0 is CLOSE
Process 0 Pipe 0 End 0 is OPEN
Process 0 Pipe 1 End 0 is CLOSE
Process 0 Pipe 1 End 1 is CLOSE
Process 0 Pipe 2 End 0 is CLOSE
Process 0 Pipe 2 End 1 is CLOSE
Process 0 Pipe 3 End 0 is CLOSE
Process 0 Pipe 3 End 1 is CLOSE
Process 0 Pipe 4 End 0 is CLOSE
Process 0 Pipe 4 End 1 is CLOSE
Process 0 Pipe 0 End 0 is CLOSE
Process 0 Pipe 0 End 0 is OPEN
Process 0 Pipe 1 End 0 is CLOSE
Process 0 Pipe 1 End 1 is CLOSE
Process 0 Pipe 2 End 0 is CLOSE
Process 0 Pipe 2 End 1 is CLOSE
Process 0 Pipe 3 End 0 is CLOSE
Process 0 Pipe 3 End 1 is CLOSE
Process 0 Pipe 4 End 0 is CLOSE
Process 0 Pipe 4 End 1 is CLOSE
Process 1 Pipe 0 End 0 is CLOSE
Process 1 Pipe 0 End 1 is CLOSE
Process 1 Pipe 1 End 0 is CLOSE
Process 1 Pipe 1 End 0 is OPEN
Process 1 Pipe 2 End 0 is CLOSE
Process 1 Pipe 2 End 1 is CLOSE
Process 1 Pipe 3 End 0 is CLOSE
Process 1 Pipe 3 End 1 is CLOSE
Process 1 Pipe 4 End 0 is CLOSE
Process 1 Pipe 4 End 1 is CLOSE
Process 0 Pipe 0 End 0 is CLOSE
Process 0 Pipe 0 End 0 is OPEN
Process 0 Pipe 1 End 0 is CLOSE
Process 0 Pipe 1 End 1 is CLOSE
Process 0 Pipe 2 End 0 is CLOSE
Process 0 Pipe 2 End 1 is CLOSE
Process 0 Pipe 3 End 0 is CLOSE
Process 0 Pipe 3 End 1 is CLOSE
Process 0 Pipe 4 End 0 is CLOSE
Process 0 Pipe 4 End 1 is CLOSE
Process 1 Pipe 0 End 0 is CLOSE
Process 1 Pipe 0 End 1 is CLOSE
Process 1 Pipe 1 End 0 is CLOSE
Process 1 Pipe 1 End 0 is OPEN
Process 1 Pipe 2 End 0 is CLOSE
Process 1 Pipe 2 End 1 is CLOSE
Process 1 Pipe 3 End 0 is CLOSE
Process 1 Pipe 3 End 1 is CLOSE
Process 1 Pipe 4 End 0 is CLOSE
Process 1 Pipe 4 End 1 is CLOSE
Process 2 Pipe 0 End 0 is CLOSE
Process 2 Pipe 0 End 1 is CLOSE
Process 2 Pipe 1 End 0 is CLOSE
Process 2 Pipe 1 End 1 is CLOSE
Process 2 Pipe 2 End 0 is CLOSE
Process 2 Pipe 2 End 0 is OPEN
Process 2 Pipe 3 End 0 is CLOSE
Process 2 Pipe 3 End 1 is CLOSE
Process 2 Pipe 4 End 0 is CLOSE
Process 2 Pipe 4 End 1 is CLOSE
Process 0 Pipe 0 End 0 is CLOSE
Process 0 Pipe 0 End 0 is OPEN
Process 0 Pipe 1 End 0 is CLOSE
Process 0 Pipe 1 End 1 is CLOSE
Process 0 Pipe 2 End 0 is CLOSE
Process 0 Pipe 2 End 1 is CLOSE
Process 0 Pipe 3 End 0 is CLOSE
Process 0 Pipe 3 End 1 is CLOSE
Process 0 Pipe 4 End 0 is CLOSE
Process 0 Pipe 4 End 1 is CLOSE
Process 1 Pipe 0 End 0 is CLOSE
Process 1 Pipe 0 End 1 is CLOSE
Process 1 Pipe 1 End 0 is CLOSE
Process 1 Pipe 1 End 0 is OPEN
Process 1 Pipe 2 End 0 is CLOSE
Process 1 Pipe 2 End 1 is CLOSE
Process 1 Pipe 3 End 0 is CLOSE
Process 1 Pipe 3 End 1 is CLOSE
Process 1 Pipe 4 End 0 is CLOSE
Process 1 Pipe 4 End 1 is CLOSE
Process 2 Pipe 0 End 0 is CLOSE
Process 2 Pipe 0 End 1 is CLOSE
Process 2 Pipe 1 End 0 is CLOSE
Process 2 Pipe 1 End 1 is CLOSE
Process 2 Pipe 2 End 0 is CLOSE
Process 2 Pipe 2 End 0 is OPEN
Process 2 Pipe 3 End 0 is CLOSE
Process 2 Pipe 3 End 1 is CLOSE
Process 2 Pipe 4 End 0 is CLOSE
Process 2 Pipe 4 End 1 is CLOSE
Process 3 Pipe 0 End 0 is CLOSE
Process 3 Pipe 0 End 1 is CLOSE
Process 3 Pipe 1 End 0 is CLOSE
Process 3 Pipe 1 End 1 is CLOSE
Process 3 Pipe 2 End 0 is CLOSE
Process 3 Pipe 2 End 1 is CLOSE
Process 3 Pipe 3 End 0 is CLOSE
Process 3 Pipe 3 End 0 is OPEN
Process 3 Pipe 4 End 0 is CLOSE
Process 3 Pipe 4 End 1 is CLOSE
Process 0 Pipe 0 End 0 is CLOSE
Process 0 Pipe 0 End 0 is OPEN
Process 0 Pipe 1 End 0 is CLOSE
Process 0 Pipe 1 End 1 is CLOSE
Process 0 Pipe 2 End 0 is CLOSE
Process 0 Pipe 2 End 1 is CLOSE
Process 0 Pipe 3 End 0 is CLOSE
Process 0 Pipe 3 End 1 is CLOSE
Process 0 Pipe 4 End 0 is CLOSE
Process 0 Pipe 4 End 1 is CLOSE
Process 1 Pipe 0 End 0 is CLOSE
Process 1 Pipe 0 End 1 is CLOSE
Process 1 Pipe 1 End 0 is CLOSE
Process 1 Pipe 1 End 0 is OPEN
Process 1 Pipe 2 End 0 is CLOSE
Process 1 Pipe 2 End 1 is CLOSE
Process 1 Pipe 3 End 0 is CLOSE
Process 1 Pipe 3 End 1 is CLOSE
Process 1 Pipe 4 End 0 is CLOSE
Process 1 Pipe 4 End 1 is CLOSE
Process 2 Pipe 0 End 0 is CLOSE
Process 2 Pipe 0 End 1 is CLOSE
Process 2 Pipe 1 End 0 is CLOSE
Process 2 Pipe 1 End 1 is CLOSE
Process 2 Pipe 2 End 0 is CLOSE
Process 2 Pipe 2 End 0 is OPEN
Process 2 Pipe 3 End 0 is CLOSE
Process 2 Pipe 3 End 1 is CLOSE
Process 2 Pipe 4 End 0 is CLOSE
Process 2 Pipe 4 End 1 is CLOSE
Process 3 Pipe 0 End 0 is CLOSE
Process 3 Pipe 0 End 1 is CLOSE
Process 3 Pipe 1 End 0 is CLOSE
Process 3 Pipe 1 End 1 is CLOSE
Process 3 Pipe 2 End 0 is CLOSE
Process 3 Pipe 2 End 1 is CLOSE
Process 3 Pipe 3 End 0 is CLOSE
Process 3 Pipe 3 End 0 is OPEN
Process 3 Pipe 4 End 0 is CLOSE
Process 3 Pipe 4 End 1 is CLOSE
Process 4 Pipe 0 End 0 is CLOSE
Process 4 Pipe 0 End 1 is CLOSE
Process 4 Pipe 1 End 0 is CLOSE
Process 4 Pipe 1 End 1 is CLOSE
Process 4 Pipe 2 End 0 is CLOSE
Process 4 Pipe 2 End 1 is CLOSE
Process 4 Pipe 3 End 0 is CLOSE
Process 4 Pipe 3 End 1 is CLOSE
Process 4 Pipe 4 End 0 is CLOSE
Process 4 Pipe 4 End 0 is OPEN
Some out ...

And want on my output this:

Code:

Process 0 Pipe 0 End 0 is CLOSE
Process 0 Pipe 0 End 0 is OPEN
Process 0 Pipe 1 End 0 is CLOSE
Process 0 Pipe 1 End 1 is CLOSE
Process 0 Pipe 2 End 0 is CLOSE
Process 0 Pipe 2 End 1 is CLOSE
Process 0 Pipe 3 End 0 is CLOSE
Process 0 Pipe 3 End 1 is CLOSE
Process 0 Pipe 4 End 0 is CLOSE
Process 0 Pipe 4 End 1 is CLOSE
Process 1 Pipe 0 End 0 is CLOSE
Process 1 Pipe 0 End 1 is CLOSE
Process 1 Pipe 1 End 0 is CLOSE
Process 1 Pipe 1 End 0 is OPEN
Process 1 Pipe 2 End 0 is CLOSE
Process 1 Pipe 2 End 1 is CLOSE
Process 1 Pipe 3 End 0 is CLOSE
Process 1 Pipe 3 End 1 is CLOSE
Process 1 Pipe 4 End 0 is CLOSE
Process 1 Pipe 4 End 1 is CLOSE
Process 2 Pipe 0 End 0 is CLOSE
Process 2 Pipe 0 End 1 is CLOSE
Process 2 Pipe 1 End 0 is CLOSE
Process 2 Pipe 1 End 1 is CLOSE
Process 2 Pipe 2 End 0 is CLOSE
Process 2 Pipe 2 End 0 is OPEN
Process 2 Pipe 3 End 0 is CLOSE
Process 2 Pipe 3 End 1 is CLOSE
Process 2 Pipe 4 End 0 is CLOSE
Process 2 Pipe 4 End 1 is CLOSE
Process 3 Pipe 0 End 0 is CLOSE
Process 3 Pipe 0 End 1 is CLOSE
Process 3 Pipe 1 End 0 is CLOSE
Process 3 Pipe 1 End 1 is CLOSE
Process 3 Pipe 2 End 0 is CLOSE
Process 3 Pipe 2 End 1 is CLOSE
Process 3 Pipe 3 End 0 is CLOSE
Process 3 Pipe 3 End 0 is OPEN
Process 3 Pipe 4 End 0 is CLOSE
Process 3 Pipe 4 End 1 is CLOSE
Process 4 Pipe 0 End 0 is CLOSE
Process 4 Pipe 0 End 1 is CLOSE
Process 4 Pipe 1 End 0 is CLOSE
Process 4 Pipe 1 End 1 is CLOSE
Process 4 Pipe 2 End 0 is CLOSE
Process 4 Pipe 2 End 1 is CLOSE
Process 4 Pipe 3 End 0 is CLOSE
Process 4 Pipe 3 End 1 is CLOSE
Process 4 Pipe 4 End 0 is CLOSE
Process 4 Pipe 4 End 0 is OPEN
Some out ...

My mistake ... i found trouble ... in placeing return to wrong process ...

this is correct ...

Code:

#include <stdio.h>#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/wait.h>




int g_fd[5][2];


void handler_readPipe(int sig)
{
    printf("I have signal ... \n");
}


void handler_readPipeSIGIO(int sig, siginfo_t *info, void *secret) 
{
    printf("I have signal ... \n");
}


int main () 
{
    // Create Pipes
    for(int i = 0; i<5; i++)
    {
        pipe(g_fd[i]);
    }


    ///int Dady = fork();


    // Create Children
    for(int j = 0; j<5; j++)
    {
        if(fork()==0)
        {
        //CloseAllPipies
            for(int i=0; i<5; i++)
            {
                close(g_fd[i][0]);
                printf("Process %d Pipe %d End 0 is CLOSE\n", j, i);
                if(j==i)
                {
                    printf("Process %d Pipe %d End 0 is OPEN\n", j, i);
                    //printf("MyChildD %d \n", getpid());
                    //Write In child
                }
                else
                {
                    printf("Process %d Pipe %d End 1 is CLOSE\n", j, i);
                    close(g_fd[i][1]);
                }
            }
            return 0;
        }
        else 
        {
            //printf("Parent process %d \n", getppid());
            //printf("MyID %d \n", getpid());
            //return 0;
            wait(NULL);
        } 
    }
    wait(NULL);
    printf("Some out ... \n");
    return(0);
}