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client-server/server.c
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#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); | |
} | |
} | |
} |