LinuxQuestions.org - need help forking pings

- Programming (https://www.linuxquestions.org/questions/programming-9/)

- - need help forking pings (https://www.linuxquestions.org/questions/programming-9/need-help-forking-pings-30124/)

need help forking pings

i want to make a program that pings a list of ips every 5 mins, and logs the pings

but i need to fork the pings
because if one of the ips goes down it will screw up my log

for example

ping x
ping y
ping z

x time=51.8 ms
y time=did not respond
z time=32.4 ms

well now imagin if i was pinging 50 ips, and 10 of them did not respond, waiting on those 10 would screw up my log unless i could find a way to make it "go around" them but still finish the full ping...

like

ping x
ping y
ping z

x time=51.8 ms
y time=not responding--- forks to ping z
z time=32.4 ms
y time=finishes pinging-did not respond...

i'm sorry if this is confusing.. i'm having a hard time explaining it..

thanks for any help

--bret

This sorta does it. You'll have to modify it heavily for your use.

Code:

#include <stdio.h>

#include <sys/wait.h>

#include <sys/types.h>

#include <unistd.h>



int main( int argc, char *argv[] )

{

    int a;

    char cmd[256];



    for( a = 1; a < argc; a++ )

    {

        pid_t cpid;

        cpid = fork();



        switch(cpid)

        {

            case -1: // uh-oh

            {

                printf("Unable to claim system resources.\n");

                break;

            }

            case 0: // i am the child proc

            {

                char cmd[256];

                

                sprintf(cmd, "ping -c 1 -w 2 %s", argv[a]);

                system(cmd);

                _exit(0); 

                break;

            }

            default: // all your child process are belong to us

            {

                int status;



                //waitpid(cpid, &status, 0);

                break;

            }

        }

    }



    return 0;

}

And in a scriptable (bash) format:

Code:

#!/bin/bash



IPS="172.26.12.1 172.26.26.2"



for ip in $IPS;

do

    ping -w 2 $ip&

done

Enjoy

hey thanks alot guy, that helped out quite a bit.