server.c

#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include <netinet/in.h>
#include <dirent.h>
#include <time.h>


void checkError(int status)
{
    if (status < 0) {
        printf("socket error(%d): [%s]\n",getpid(),strerror(errno));
        exit(-1);
    }
}

int main(int argc, char ** argv) {

    if (argc != 2) {
        printf("usage: ./server <filepath of bash>");
    }
	int sid = socket(PF_INET,SOCK_STREAM,0);
	struct sockaddr_in addr;
    	addr.sin_family = AF_INET;
    	addr.sin_port   = htons(8025);
    	addr.sin_addr.s_addr = INADDR_ANY;

	int status = bind(sid,(struct sockaddr*)&addr,sizeof(addr));
	checkError(status);
	status = listen(sid,10);
    checkError(status);

	while(1) {
        	struct sockaddr_in client;
        	socklen_t clientSize;
        	int chatSocket = accept(sid,(struct sockaddr*)&client,&clientSize);
        	checkError(chatSocket);
        	printf("We accepted a socket: %d\n",chatSocket);
        	pid_t child = fork();
        	if (child == 0) {
                printf("child here\n");
                dup2(chatSocket, 0);
                dup2(chatSocket, 1);
                dup2(chatSocket, 2);
                execlp(argv[1], "bash", NULL);
                printf("bash failed\n");exit(-1);
    		} else if (child > 0) {
                printf("Created a child: %d\n",child);
                close(chatSocket);
    		}
    	}
    }