int main()
{
/*Defining the prompt*/
char prompt[] = "kapotFTP:~>";
strcpy(send_data, prompt);
control_port = CONTROL_PORT_NO;
//file_port = FILE_PORT_NO;
/* Function Calls for actual working of the server*/
setupServerPrimaries();
serveClients();
}
int main(int argc, char **argv)
{
int portNumber;
int listenedFD;
checkArgument(argc, argv);
Signal(SIGCHLD, sigChildHandler);
portNumber = getPortNumber(argc, argv);
listenedFD = Open_listenfd(portNumber);
for (;;)
serveClients(listenedFD);
}
void executeCommand(char *command)
{
char BYE[] = "bye";
char GET[] = "get";
char PUT[] = "put";
char DIR[] = "dir";
char LS[] = "ls";
char DELETE[] = "delete";
char MKDIR[] = "mkdir";
char RMDIR[] = "rmdir";
char CD[] = "cd";
char HELP[] = "help";
char * first_arg , * second_arg ;
int i;
printf("\n\n=======New Command Entered======\n");
if(command == NULL)
{
printf("The client did not enter any valid command or went down unexpectedly going to waiting mode\n");
serveClients();
}
printf("\n Raw command=%s \n\n", command);
first_arg = strtok(command, DELIM);
second_arg = strtok(NULL, DELIM);
if(first_arg == NULL)
{
printf("The client did not enter any valid command or went down unexpectedly going to waiting mode\n");
serveClients();
}
printf("first %s, second %s\n", first_arg, second_arg);
if(!strcmp(first_arg, GET))
{
printf("The user entered GET command\n");
strcpy(response, "You just entered GET command\n");
if(second_arg != NULL)
{
transferFile(second_arg);
for(i=0 ; i<4095 ; i++)
{
response[i] = '\0';
}
send(connected, response,strlen(response), 0);
for(i=0 ; i<4095 ; i++)
{
response[i] = '\0';
}
}
else
strcpy(response, "Bad command for get : Usage >> get <dir_name>\n");
}
else if(!strcmp(first_arg, PUT))
{
if(second_arg != NULL)
{
printf("The user entered PUT command\n");
file_bytes_recieved = recv(connected, file_recv_data, 4096, 0);
file_recv_data[file_bytes_recieved] = '\0';
writeToFile(second_arg, file_recv_data); //second_arg=filename; file_recv_data=actual recieved data
printf("recieved %d bytes\n", file_bytes_recieved);
strcpy(response, "Data bytes recieved successfully at the server.\n");
}
else
strcpy(response, "Bad command for put : Usage >> put <dir_name>\n");
}
else if(!strcmp(first_arg, LS) || !strcmp(first_arg, DIR))
{
printf("The user entered LS command\n");
int link[2];
pid_t pid;
char output_of_ls[4096];
if (pipe(link)==-1)
die("pipe");
if ((pid = fork()) == -1)
die("fork");
if(pid == 0) {
dup2 (link[1], STDOUT_FILENO);
close(link[0]);
if(second_arg != NULL)
execl("/bin/ls", "/bin/ls", "-r", second_arg, "-l", (char *) 0);
else
execl("/bin/ls", "/bin/ls", "-r", "-t", "-l", (char *) 0);
}
else {
close(link[1]);
int i;
for(i=0 ; i<4095 ; i++)
{
output_of_ls[i] = '\0';
response[i] = '\0';
}
printf("The value of output_of_ls after flush: %s \n", output_of_ls);
read(link[0], output_of_ls, sizeof(output_of_ls));
printf("Output: (%s)\n", output_of_ls);
strcpy(response, "");
strcpy(response, output_of_ls);
wait(NULL);
}
}
else if(!strcmp(first_arg, DELETE))
{
printf("The user entered DELETE command\n");
int link[2];
pid_t pid;
char output_of_delete[4];
if (pipe(link)==-1)
die("pipe");
if ((pid = fork()) == -1)
die("fork");
if(pid == 0) {
dup2 (link[1], STDOUT_FILENO);
close(link[0]);
if(second_arg != NULL)
execl("/bin/rm", "/bin/rm", "-rf", "", second_arg, (char *) 0);
else
strcpy(response, "Bad command for delete : Usage >> delete <filename>\n");
} else {
close(link[1]);
read(link[0], output_of_delete, sizeof(output_of_delete));
printf("Output: (%s)\n", output_of_delete);
strcpy(response, "");
strcpy(response, output_of_delete);
wait(NULL);
}
}
else if(!strcmp(first_arg, MKDIR))
{
printf("The user entered MKDIR command\n");
int link[2];
pid_t pid;
char output_of_mkdir[4096];
if (pipe(link)==-1)
die("pipe");
if ((pid = fork()) == -1)
die("fork");
if(pid == 0) {
dup2 (link[1], STDOUT_FILENO);
close(link[0]);
if(second_arg != NULL)
execl("/bin/mkdir", "/bin/mkdir", "", "", second_arg, (char *) 0);
else
strcpy(response, "Bad command for mkdir : Usage >> mkdir <dir_name>\n");
} else {
close(link[1]);
read(link[0], output_of_mkdir, sizeof(output_of_mkdir));
printf("Output: (%s)\n", output_of_mkdir);
strcpy(response, "");
wait(NULL);
}
}
else if(!strcmp(first_arg, RMDIR))
{
printf("The user entered RMDIR command\n");
int link[2];
pid_t pid;
char output_of_rmdir[4];
if (pipe(link)==-1)
die("pipe");
if ((pid = fork()) == -1)
die("fork");
if(pid == 0) {
dup2 (link[1], STDOUT_FILENO);
close(link[0]);
if(second_arg != NULL)
{
execl("/bin/rm", "/bin/rm", "-rf", "", second_arg, (char *) 0);
}
else
strcpy(response, "Bad command for mkdir : Usage >> mkdir <dir_name>\n");
} else {
close(link[1]);
read(link[0], output_of_rmdir, sizeof(output_of_rmdir));
printf("Output: (%s)\n", output_of_rmdir);
strcpy(response, "");
wait(NULL);
}
}
else if(!strcmp(first_arg, CD))
{
printf("The user entered CD command\n");
int link[2];
pid_t pid;
char output_of_cd[4096];
if (pipe(link)==-1)
die("pipe");
if ((pid = fork()) == -1)
die("fork");
if(pid == 0) {
dup2 (link[1], STDOUT_FILENO);
close(link[0]);
if(second_arg != NULL)
{
int result =chdir(second_arg);
if(result != -1)
{strcat(response, "PWD changed to ");
strcat(response, second_arg);
strcat(response, "\n");
}
else
{
perror("Couldn't execute\n");
strcat(response, "Bad directory name\n");
}
}
else
strcpy(response, "Bad command for mkdir : Usage >> mkdir <dir_name>\n");
} else {
close(link[1]);
read(link[0], output_of_cd, sizeof(output_of_cd));
printf("Output: (%s)\n", output_of_cd);
strcpy(response, "");
wait(NULL);
}
}
else if(!strcmp(first_arg, BYE))
{
printf("The user entered BYE command\n");
//free(first_arg);
//free(second_arg);
printf("reaching here\n");
//closeSocket();
//close(connected);
serveClients();
//exit(0);
}
else if(!strcmp(first_arg, HELP))
{
printf("The user entered BYE command\n");
strcpy(response, "Supported commands: ls, dir, get, put, delete <filename>, mkdir <dirname>, rmdir <dirname>, cd <dirname>, bye.\n");
}
else
{
printf("Invalid command entered\n");
strcpy(response, "Bad command : type 'help' for more info.\n");
}
}
