c - opendir() 出现段错误？

Question

我不知道为什么我在这个函数中不断遇到这个段错误谁能启发我如何摆脱它并使我的程序正常工作......？

Lign 33:通量= opendir(路径);Lign 98 : ret = listdir(env, stock, pos, stock->stock_name[stock->i]);

int     listdir(t_env* env, t_stock* stock, t_pos* pos, char* path)
{
        struct dirent*  dirinfo;
        DIR*            flux;

        init_xy(pos);
        cl_screen(env);

        flux = opendir(path);
        if (flux == NULL)
                return (1);
        alloc_mem(stock);
        stock->i = 0;
        while ((dirinfo = readdir(flux)))
        {
                id_strcpy(stock->stock_name[stock->i], dirinfo->d_name);               
                print_list(env, pos);
                id_print_str(stock->stock_name[stock->i]);
                pos->y = pos->y + 1;
                stock->i = stock->i + 1;
        }
        stock->i = stock->i - 1;
        pos->y = pos->y - 1;
        pos->ymax = pos->y;
        closedir(flux);
        return (0);
}

void    enter(t_env* env, t_pos* pos, t_stock* stock)
{
        int     ret;

        (void)pos;
        cl_screen(env);
        frame(env);
        ret = listdir(env, stock, pos, stock->stock_name[stock->i]);

        ret = 0;
        if (ret == 1)
        {
                free_mem(stock);
                reset_keypress();
                exit(1);
        }
        stock->i = 0;
}

(gdb) where
#0  __opendir (name=0x0) at ../sysdeps/unix/opendir.c:86
#1  0x08048ebb in listdir (env=0xbffff890, stock=0xbffff880, pos=0xbffff86c, path=0x0) at listdir.c:33
#2  0x080494ad in enter (env=0xbffff890, pos=0xbffff86c, stock=0xbffff880) at run_fct.c:98
#3  0x0804930a in press (env=0xbffff890, pos=0xbffff86c, stock=0xbffff880, arrows=0xbffff82d "\n") at run_fct.c:51
#4  0x080491db in run (env=0xbffff890, pos=0xbffff86c, stock=0xbffff880) at run_fct.c:25
#5  0x08048985 in main (argc=2, argv=0xbffff954) at main.c:35

Answer 1

您的回溯显示您将 NULL 作为 name 参数传递给 opendir()。那是行不通的。看起来 enter() 中的 stock 数据结构未填充您期望的内容。特别是，当您调用 opendir() 失败时，stock->stock_name[stock->i] 为 NULL。