cl3.c

#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#define MSG_LEN 120
#define DFL_PORT 8006

int get_cmd(char* line, int sock){
    FILE *fp;
    char* filename2 = malloc(strlen(line));
    strcpy(filename2, line);
    int isfileopen = 0;
    int readcount;
    char* filename = malloc(strlen(line));
    filename = strtok(filename2, " ");
    filename = strtok(NULL, " ");
    printf("filename %s, line %s_\n", filename, line);

    if( (fp = fopen(filename, "wb")) == NULL ){
        perror("get_cmd open file");
        return 1;
    }else{
        isfileopen = 1;
        write(sock, line, MSG_LEN);

    }

    while(1){
        readcount = read(sock, line, MSG_LEN);
        if(readcount<MSG_LEN) line[readcount] = '\0';
        printf("get_cmd %s_%d\n", line, readcount);
        fwrite(line, 1, readcount, fp);

            if(readcount<MSG_LEN-1){
                break;
            }
    }

    if(isfileopen){
        fclose(fp);
    }
    printf("cl get_cmd: file recieved\n");

return 0;
}


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

  struct sockaddr_in server; //Server's address assembled here
  struct hostent *host_info;
  int sock, i;
  char *server_name;
  char* line = malloc(MSG_LEN);


//   Get server name from commandline. If none, use localhost
  if ( argc > 1 )
    server_name = argv[1];
  else
    server_name = "localhost";

//   Create the socket
  sock = socket(AF_INET, SOCK_STREAM, 0);
  if (sock < 0) {
    perror("creating stream socket");
    exit(EXIT_FAILURE);
  }


  host_info = gethostbyname(server_name);
  if (host_info == NULL) {
    fprintf(stderr, "%s: unknown host: %s\n", argv[0], server_name);
    exit(EXIT_FAILURE);
  }


  server.sin_family = host_info->h_addrtype;
  memcpy((char *)&server.sin_addr, host_info->h_addr,host_info->h_length);
  server.sin_port = htons(DFL_PORT);

  if (connect(sock, (struct sockaddr *)&server, sizeof server) < 0) {
    perror("connecting to server");
    exit(EXIT_FAILURE);
  }

  printf("connected to server %s\n", server_name);
  printf("Commands l - alias 'ls'\n         g [file name] - get file from server\n\n");

int command = 0;
FILE *fp;

while(1){
    int isfileopen = 0;

        fgets(line, MSG_LEN-1, stdin);

        command = line[0];
    if(command == 'g'){
        line[strlen(line)-1] = '\0';  // for deleting the '\n'
                             // char that fgets put at the end
    }

    printf("line %s_%d, x_%c_x\n", line, strlen(line), line[0]);
//     for(i=0;i<strlen(line); i++){
//
//         printf("line[%d]: %c\n",i, line[i]);
//     } // print out garbage

    if(line[0] == '\0'){
        continue;
    }

        printf("cmd %c\n", command);

        if(command == 'g'){
            get_cmd(line, sock);
            continue;
        }

        write(sock, line, MSG_LEN-1);


    printf("Get answer...\n");
    while( (i=read(sock, line, MSG_LEN)) >0 ){
        line[i] = '\0';
        printf("%d_%s_\n",i, line);


        if(i<MSG_LEN-1){
            break;
        }
    }
    bzero(line, MSG_LEN);
        if(isfileopen){
            fclose(fp);
        }
}
  close(sock);
  return 0;
}