void run_commands(t_command *list, char ***env)
{
int s_stdin;
t_command *save;
save = list;
s_stdin = dup(STDIN_FILENO);
while (list)
{
choose_command(list, env);
list = list->next;
}
while (save)
{
wait(0);
save = save->next;
}
dup2(s_stdin, 0);
}
/* main function for snp */
int main(int argc, char** argv){
int n, port_p, port_a, ret;
int fd_chat;
socklen_t addrlen;
fd_set rfds;
int maxfd, counter;
struct hostent *h;
struct sockaddr_in addr_chat;
char opt, input[10];
char buffer[512];
char options[128];
char *cmd;
char *msg;
char *surname, *snpip, *snpport;
char *saip, *saport;
list *start,*temp;
start = (list *)malloc(sizeof(list));
temp = start;
temp -> prox = NULL;
temp -> ant = NULL;
surname = NULL;
snpip = NULL;
snpport = NULL;
saip = NULL;
saport = NULL;
/* usage of getopt function which deals with the input (argv)*/
strcpy(input, "n:s:q:i:p:");
while((opt = getopt(argc, argv, input))!=-1){
if(opt == '?'){
if(optopt == 'n' || optopt == 's' || optopt == 'q' || optopt == 'i' || optopt == 'p'){
write(1, "Required arg for option -", strlen("Required arg for option -"));
printf("%c", optopt);
write(1, "\n", 1);
}
else if(isprint(optopt)) {
write(1,"Unknown option -", strlen("Unknown option -"));
printf("%c", optopt);
write(1, "\n", 1);
}
else{
printf("Unknown option character `\\x%x`.\n",optopt);
}
return -1;
}
if(opt == 'n'){
surname = optarg;
}
if(opt == 's'){
snpip = optarg;
}
if(opt == 'q'){
snpport = optarg;
}
if(opt == 'i'){
saip = optarg;
}
if(opt == 'p'){
saport = optarg;
}
}
/* check if surname, ip and port were given from argv otherwise close */
if(surname == NULL || snpip == NULL || snpport == NULL){
exit(1);
}
/* since it is not mandatory to give the ip of the sa: */
/* we need to check if it was given or if we should use the default (tejo) */
if(saip == NULL){
/* connect to the sa, tejo in this case */
h = gethostbyname("tejo.tecnico.ulisboa.pt");
if(h == NULL){
write(1, "Unable to reach sa (tejo)\n", strlen("Unable to reach sa (tejo)\n"));
exit(1);
}
}else{
/* connect to the sa, other than tejo in this case */
inet_pton(AF_INET, saip, &temp);
h = gethostbyaddr(&temp,sizeof(temp),AF_INET);
if(h == NULL){
write(1, "Unable to reach sa\n", strlen("Unable to reach sa\n"));
exit(1);
}
}
/* since it is not mandatory to give the port of the sa: */
/* we need to check if it was given or if we should use the default (58000) */
if(saport == NULL){
/* no port given */
port_a = 58000;
}else{
/* get port given by input */
port_a = atoi(saport);
}
/* get port given by input for this snp */
if(sscanf(snpport, "%d\n", &port_p) != 1) {
write(1, "Not a valid port\n", strlen("Not a valid port\n"));
exit(1);
}
/* initializes the socket used to communicate with schats */
fd_chat = socket(AF_INET,SOCK_DGRAM, 0);
if(fd_chat == -1) exit(1);
sscanf(snpport,"%d\n",&port_p);
memset((void*)&addr_chat, (int)'\0', sizeof(addr_chat));
addr_chat.sin_family = AF_INET;
addr_chat.sin_addr.s_addr = htonl(INADDR_ANY);
addr_chat.sin_port = htons(port_p);
ret = bind(fd_chat, (struct sockaddr*)&addr_chat, sizeof(addr_chat));
if(ret == -1) exit(1);
/* register the snp server in the sa serverc*/
init_sa(h, port_a, surname, snpip, snpport);
while(1){
FD_ZERO(&rfds);
FD_SET(fd_chat,&rfds);
FD_SET(fileno(stdin), &rfds);
maxfd = max(fd_chat,fileno(stdin));
/* returns the number of file descriptors ready */
counter = select(maxfd+1, &rfds, (fd_set*)NULL, (fd_set*)NULL, (struct timeval *)NULL);
if(counter <= 0) exit(1);
if(FD_ISSET(fileno(stdin), &rfds)){
fgets(options, 128, stdin);
if(strcmp(options, "list\n") == 0){
/* The typed command is LIST */
imprime_lista(start->prox);
}else{
if(strcmp(options, "exit\n") == 0){
/* The typed command is EXIT */
free_sa( h, 58000, surname);
break;
}
else write(1, "Not an option\nThe options are: \n1)list\n2)exit\n", strlen("Not an option\nThe options are: \n1)list\n2)exit\n"));
}
}
if(FD_ISSET(fd_chat, &rfds)){ /*fd_chat is ready*/
memset(buffer,0,strlen(buffer));
addrlen = sizeof(addr_chat);
n = recvfrom(fd_chat, buffer, 128, 0, (struct sockaddr*)&addr_chat, &addrlen);
if(n == -1) exit(1);
/* Received command */
buffer[n] = '\0';
cmd = (char*) malloc(sizeof(char)*4);
strncpy(cmd,buffer, 3);
cmd[3] = '\0';
if(choose_command(cmd)==0){
/* The received command is to register a user (REG) */
msg = register_new(start, buffer, n, surname);
n = sendto(fd_chat, msg, strlen(msg), 0, (struct sockaddr*)&addr_chat, addrlen);
if(n==-1) {
write(1, "NOK message not sent. Error replying!", strlen("NOK message not sent. Error replying!"));
}
}
if(choose_command(cmd) == 1){
/* The received command is to delete a registered user (UNR) */
msg = u_unregister(start, buffer, n, surname);
n = sendto(fd_chat, msg, strlen(msg), 0, (struct sockaddr*)&addr_chat, addrlen);
if(n==-1) {
write(1, "NOK message not sent. Error replying!", strlen("NOK message not sent. Error replying!"));
}
}
/* The received command is to query a user (QRY) */
if(choose_command(cmd) == 2){
msg = do_qry(start, buffer, n, h, 58000, surname);
n = sendto(fd_chat, msg, strlen(msg), 0, (struct sockaddr*)&addr_chat, addrlen);
if(n==-1) {
write(1, "NOK message not sent. Error replying!", strlen("NOK message not sent. Error replying!"));
}
}
free(cmd);
}
}
close(fd_chat);
free(start);
exit(0);
}
