Linux下用GTK和socket實現簡單的聊天室

 

用GTK和socket實現簡單的聊天室，出現“段錯誤”。是哪裡的問題？？

麻煩看看我的程式，我要用GTK圖形介面做一個簡單的聊天室，在兩台機器上實現通訊。現在程式可以編譯過去，但是運行時，當客戶段彈出登入介面時，輸入使用者名稱再點擊確定的時候，就在終端顯示“段錯誤”。我是新手，剛剛入門，向前輩們請教，盼回複。

伺服器端：

#include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define OUTPORT 3333#define MAX_USERS 8struct _client{gint sd;gboolean in_use;gchar name[64];gchar buf[1024];};typedef struct _client client;client user[MAX_USERS];void do_service(gpointer id){gint j;char tobuf[1024];while(read(user[GPOINTER_TO_INT(id)].sd,user[GPOINTER_TO_INT(id)].buf,1024)!=-1){sprintf(tobuf,"%s: %s",user[GPOINTER_TO_INT(id)].name,user[GPOINTER_TO_INT(id)].buf);for(j=0;j {if(user[j].in_use){write(user[j].sd,tobuf,1024);g_printf("%s",tobuf);}}}user[GPOINTER_TO_INT(id)].in_use=FALSE;close(user[GPOINTER_TO_INT(id)].sd);//exit(0);}int main(int agrv,char *argv[]){gint sd,newsd;struct sockaddr_in *my_addr; /* 本機地址資訊 */struct sockaddr_in *remote_addr; /* 用戶端地址資訊 */gint slen;gint count=0;gint flags;gchar buf[1024];gchar tobuf[1024];gint length,i,j;if(!g_thread_supported())g_thread_init(NULL);elseg_print("thread not support");sd=socket(AF_INET,SOCK_STREAM,0);if(sd==-1){g_print("Creat socket error!");return -1;}my_addr=g_new(struct sockaddr_in,1);my_addr->sin_family=AF_INET;my_addr->sin_port=htons(OUTPORT);my_addr->sin_addr.s_addr = INADDR_ANY;bzero( &(my_addr->sin_zero),8);slen=sizeof(struct sockaddr_in);if(bind(sd,(struct sockaddr *) my_addr,slen)<0){g_print("bind error!");return -1;}if(listen(sd,8)<0){g_print("listen error!");}for(i=0;i user.in_use=FALSE;flags=fcntl(sd,F_GETFL);fcntl(sd,F_GETFL,flags&~O_NDELAY);for(;;){newsd=accept(sd,(struct sockaddr *) remote_addr, &slen);if(newsd==-1){g_print("accept error");break;}else{if(count>=MAX_USERS){sprintf(buf,"使用者數量過多，伺服器不能串連!");write(newsd,buf,1024);close(newsd);}else{flags=fcntl(user.sd,F_GETFL);fcntl(user.sd,F_SETFL,O_NONBLOCK);user[count].sd=newsd;user[count].in_use=TRUE;read(newsd,user[count].name,64);g_thread_create((GThreadFunc)do_service,(gpointer)count,TRUE,NULL);count++;}}}//for(;;)close(sd);g_free(my_addr);}

伺服器端：

#include #include #include #include #include #include #include #include #include #define OUTPORT 3333gint sd;struct sockaddr_in s_in;struct hostent *host;gchar username[64];gchar buf[1024];//readgchar get_buf[1048];//writegboolean isconnected=FALSE;static GtkWidget *text;static GtkTextBuffer *buffer;static GtkWidget *message_entry;static GtkWidget *name_entry;static GtkWidget *login_button;void get_message(void){GtkTextIter iter;gchar get_buf[1024];gchar buf[1024];while(read(sd,buf,1024)!=-1){sprintf(get_buf,"%s",buf);gdk_threads_enter();gtk_text_buffer_get_end_iter(buffer,&iter);gtk_text_buffer_insert(buffer,&iter,get_buf,-1);gdk_threads_leave();}}void on_destroy(GtkWidget *widget,GdkEvent *event,gpointer data){sprintf(username,"guest");if(do_connect()==TRUE){gtk_widget_set_sensitive(login_button,FALSE);g_thread_create((GThreadFunc)get_message,NULL,FALSE,NULL);}gtk_widget_destroy(widget);}void on_button_clicked(GtkButton *button,gpointer data){const gchar *name;name=gtk_entry_get_text(GTK_ENTRY(name_entry));sprintf(username,"%s",name);if(do_connect()){gtk_widget_set_sensitive(login_button,FALSE);g_thread_create((GThreadFunc)get_message,NULL,FALSE,NULL);}gtk_widget_destroy(data);}void creat_win(void){GtkWidget *win,*vbox;GtkWidget *button;win=gtk_window_new(GTK_WINDOW_TOPLEVEL);gtk_window_set_title(GTK_WINDOW(win),"輸入使用者名稱");gtk_container_set_border_width(GTK_CONTAINER(win),10);g_signal_connect(G_OBJECT(win),"delete_event",G_CALLBACK(on_destroy),NULL);gtk_window_set_modal(GTK_WINDOW(win),TRUE);gtk_window_set_position(GTK_WINDOW(win),GTK_WIN_POS_CENTER);vbox= gtk_vbox_new(FALSE,0);gtk_container_add(GTK_CONTAINER(win),vbox);name_entry=gtk_entry_new();gtk_box_pack_start(GTK_BOX(vbox),name_entry,TRUE,TRUE,5);button=gtk_button_new_from_stock(GTK_STOCK_OK);g_signal_connect(G_OBJECT(button),"clicked",G_CALLBACK(on_button_clicked),win);gtk_box_pack_start(GTK_BOX(vbox),button,FALSE,FALSE,5);gtk_widget_show_all(win);}gboolean do_connect(void){GtkTextIter iter;gint slen;sd=socket(AF_INET,SOCK_STREAM,0);if(sd<0){gtk_text_buffer_get_end_iter(buffer,&iter);gtk_text_buffer_insert(buffer,&iter,"開啟通訊端時出錯！",-1);return FALSE;}s_in.sin_family=AF_INET;s_in.sin_port=htons(OUTPORT);s_in.sin_addr=*((struct in_addr *)host->h_addr);bzero(&(s_in.sin_zero),8);slen=sizeof(s_in);if(connect(sd,(struct sockaddr *) &s_in,slen)<0){gtk_text_buffer_get_end_iter(buffer,&iter);gtk_text_buffer_insert(buffer,&iter,"串連伺服器時出錯！",-1);return FALSE;}else{gtk_text_buffer_get_end_iter(buffer,&iter);gtk_text_buffer_insert(buffer,&iter,username,-1);gtk_text_buffer_get_end_iter(buffer,&iter);gtk_text_buffer_insert(buffer,&iter,"成功於伺服器串連!",-1);//write(sd,username,64);//isconnected=TRUE;return TRUE;}}void on_send(GtkButton *button,gpointer data){const char *message;if(isconnected==FALSE) return;message=gtk_entry_get_text(GTK_ENTRY(message_entry));sprintf(buf,"%s",message);write(sd,buf,1024);gtk_entry_set_text(GTK_ENTRY(message_entry),"");}void on_login(GtkWidget *widget,GdkEvent *weent,gpointer data){creat_win();}void on_delete_event(GtkWidget *widget,GdkEvent *event,gpointer data){close(sd);gtk_main_quit();}int main(int argc,char *argv[]){GtkWidget *window;GtkWidget *vbox,*hbox,*button,*label,*view;if(!g_thread_supported())g_thread_init(NULL);gtk_init(&argc,&argv);window=gtk_window_new(GTK_WINDOW_TOPLEVEL);gtk_window_set_title(GTK_WINDOW(window),"用戶端");g_signal_connect(G_OBJECT(window),"delete_event",G_CALLBACK(on_delete_event),NULL);gtk_container_set_border_width(GTK_CONTAINER(window),10);vbox=gtk_vbox_new(FALSE,0);gtk_container_add(GTK_CONTAINER(window),vbox);hbox=gtk_hbox_new(FALSE,0);gtk_box_pack_start(GTK_BOX(vbox),hbox,FALSE,FALSE,5);label=gtk_label_new("點擊登入按鈕串連伺服器");gtk_box_pack_start(GTK_BOX(hbox),label,FALSE,FALSE,5);login_button=gtk_button_new_with_label("登入");gtk_box_pack_start(GTK_BOX(hbox),login_button,FALSE,FALSE,5);g_signal_connect(G_OBJECT(login_button),"clicked",G_CALLBACK(on_login),NULL);view=gtk_scrolled_window_new(NULL,NULL);gtk_scrolled_window_se