opendir() 出现分段错误？

Question

我不知道为什么我在这个函数中不断遇到这个分段错误 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 。