Nomius

The C program:

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <sys/signal.h>

void usage_and_die(int ret){
    printf("usage: spawner program parameters\n");
    exit(1);
}

char *get_real_name(char *str){
    char *PATH, *path, *subtoken;
    int fd, i=0, path_len;
    if((fd=open(str, O_RDONLY)) != -1){
        path=calloc(2+strlen(str), sizeof(char));
        sprintf(path, "./%s", str);
        close(fd);
        return path;
    }
    PATH=getenv("PATH");
    path_len=strlen(PATH);
    if(PATH==NULL)
        return NULL;
    else {
        while((subtoken = strtok(PATH+i, ":")) != NULL && i < path_len){
            path=calloc(strlen(str)+1+strlen(subtoken), sizeof(char));
            sprintf(path, "%s/%s", subtoken, str);
            if((fd=open(path, O_RDONLY)) != -1){
                close(fd);
                return path;
            }
            else {
                free(path);
                i += strlen(subtoken) + 1;
            }
        }
    }
    return NULL;
}

int main(int argc, char **argv){
    int status;
    pid_t pid;
    char *real_file;
    if(argc<2)
        usage_and_die(1);
    if(!strcmp(argv[0], argv[1])){
        printf("\nWhat? Trying to run myself inside of myself? Come on, I know you're better than this\n\n");
        exit(1);
    }
    real_file=get_real_name(argv[1]);
    if((pid = fork()) != 0) {
        sleep(2);
        waitpid(pid, &status, 0);
        while (killpg(pid, 0) != -1)
            usleep(0.5);
        printf("Script %s returned: %s\n", real_file, WTERMSIG(status));
    } else {
        if(setpgid(getpid(), getpid()) == -1){
            perror("setpgid");
            exit(1);
        }
        if(real_file != NULL){
            if(execv(real_file, argv+1) == -1){
                perror("execv");
                exit(1);
            }
        }
        else {
            printf("-spawner: %s: Command not found\n", argv[1]);
            exit(1);
        }
    }
    return 0;
}




 #!/usr/bin/env bash

function pinging(){
    SUBNET=${1}
    LAST=${2}
    PING="$(which ping) -c 1 -W 1"
    ${PING} ${SUBNET}.${LAST} > /dev/null 2>&1
    if [ $? -eq 0 ]; then
       echo -e "${SUBNET}.${LAST} is up"
    fi
}

if [ -z ${2} ]; then
   for((x=1;x<255;x++)); do
       ${0} ${1} ${x} &
   done
else
    pinging ${1} ${2}
fi