Question

我无法理解为什么我在这个函数中不断出现这种分段错误任何人都可以告诉我如何摆脱它并让我的程序工作......？

Lign 33：flux = opendir（path）; Lign 98：ret = listdir（env，stock，pos，stock-＆gt; stock_name [stock-＆gt; 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

您的回溯表明您将NULL作为name参数传递给opendir()。那不行。看起来stock中的enter()数据结构未填充您期望的结果。特别是，当您对stock->stock_name[stock->i]进行失败调用时，NULL为opendir()。

使用opendir（）进行分段错误？

1 个答案: