int
main(int argc,char *argv[]){
volatile int fd;
volatile off_t off;
if(argc != 3 || strcmp(argv[1],"--help")==0)
usageExit("%s pathname offset\n",argv[0]);
fd = open(argv[1],O_RDWR | O_CREAT, S_IRUSR | S_IWUSR);
if(fd == -1)
errnoExit("open()");
off = atoll(argv[2]);
if(lseek(fd,off,SEEK_SET) == -1)
errnoExit("lseek()");
#define TEST_SIZE 4
if(write(fd,"test",TEST_SIZE) != TEST_SIZE)
errnoExit("write()");
if(close(fd) == -1)
errnoExit("close()");
exit(EXIT_SUCCESS);
}
void acceptClients(serv *server){
int socket = server->socket;
struct sockaddr_in clientAddr;
int clientSocket;
pthread_attr_t worker_attr;
pthread_attr_init(&worker_attr);
pthread_attr_setdetachstate(&worker_attr, PTHREAD_CREATE_DETACHED);
pthread_t worker_thread;
socklen_t sinSizeClient = sizeof(struct sockaddr_in);
/*the accept loop*/
while(1){
if((clientSocket = accept(socket, (struct sockaddr *) &clientAddr, &sinSizeClient)) < 0){
perror("ERROR: Could not accept client");
continue;
}
/*resolve the clients host name*/
bstring clientHostName = safe_BfromCstr("");
int rc = getnameinfo((struct sockaddr *) &clientAddr, sinSizeClient,
charBuffromBstr(clientHostName), IRC_MAX_LEN+1, NULL, 0, 0);
clientHostName->slen = strlen(charBuffromBstr(clientHostName));
if (rc != 0 || !clientHostName->slen){
bdestroy(clientHostName);
clientHostName = safe_BfromCstr("unresolved");
}
/*init the client*/
cli *newClient = initClient(clientSocket, clientHostName, server);
/*create thread to wait for the client to register and then handle client request*/
if (pthread_create(&worker_thread, &worker_attr, &enterRegister, newClient) != 0){
clientFree(newClient);
close(socket);
errnoExit("ERROR: Could not create thread");
}
}
/*free server*/
serverFree(server);
}
/*start server listening on port*/
serv *initServer(char *port, char *password){
int serverSocket;
/*adress info structs to be packed*/
struct sockaddr_in serverAddr;
int yes = 1;
memset(&serverAddr, 0, sizeof(serverAddr));
serverAddr.sin_family = AF_INET;
serverAddr.sin_port = htons(atoi(port));
serverAddr.sin_addr.s_addr = INADDR_ANY;
if ((serverSocket = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0){
errnoExit("ERROR: Could not find a socket to bind to");
}
/*multiple sockets on the same address*/
if (setsockopt(serverSocket, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(int)) < 0){
close(serverSocket);
errnoExit("ERROR: Could not set socket options");
}
if (bind(serverSocket, (struct sockaddr *) &serverAddr, sizeof(serverAddr)) < 0){
close(serverSocket);
errnoExit("ERROR: Could not bind to socket");
}
if(listen(serverSocket, SERVER_BACKLOG) < 0){
close(serverSocket);
errnoExit("ERROR: Fail on listen");
}
printf("Listening on port %s...\n", port);
serv *newServer = (serv *) allocaZam(sizeof(serv));
/*get time that server was created*/
time_t currTime = time(NULL);
char *createdStr = ctime(&currTime);
int len = strlen(createdStr);
createdStr[len - 1] = '\0';
bstring created = safe_BfromCstr(createdStr);
newServer->created = created;
/*set server name*/
bstring serverName = safe_BfromCstr("");
int rc = gethostname(charBuffromBstr(serverName), 513);
serverName->slen = strlen(charBuffromBstr(serverName));
if (rc != 0 || !serverName->slen){
bdestroy(serverName);
serverName = safe_BfromCstr("unresolved host");
}
newServer->name = serverName;
/*initialize reader/writer lock to eliminate race conditions*/
/*between threads trying modify server state*/
newServer->lock = newRwlock();
/*initialize reader/writer locks to eliminate race conditions*/
/*between threads trying to write the same key to the tree*/
/*concurrently, read a key that's being changed, etc.*/
newServer->clientsLock = newRwlock();
newServer->channelsLock = newRwlock();
/*initialize client hash table* to hold server
* state and hash client data by nick*/
cliTbl *clients = (cliTbl*) allocaZam(sizeof(cliTbl));
*clients = NULL;
newServer->clients = clients;
chnlTbl *channels = (chnlTbl*) allocaZam(sizeof(chnlTbl));
*channels = NULL;
newServer->channels = channels;
/*set additional server info*/
newServer->socket = serverSocket;
newServer->password = safe_BfromCstr(password);
newServer->info = safe_BfromCstr("chir-0.0.2");
newServer->version = safe_BfromCstr("0.0.2");
newServer->channelModes = safe_BfromCstr("mtov");
newServer->userModes = safe_BfromCstr("ao");
newServer->numClients = 0;
newServer->numConnections = 0;
newServer->numChannels = 0;
return newServer;
}