2021-04-06 yuchun1214

測驗 1

static void run(char *c, int t)
{
    char *redir_stdin = NULL, *redir_stdout = NULL;
    int pipefds[2] = {0, 0}, outfd = 0;
    char *v[99] = {0};
    char **u = &v[98]; /* end of words */
    for (;;) {
        c--;
        if (is_delim(*c)) /* if NULL (start of string) or pipe: break */
            break;
        if (!is_special(*c)) {
            c++; /* Copy word of regular chars into previous u */
            // XXXXX /* 在此提交你的程式碼 */
            /****************************/
            --u;
            if (is_blank(*c))
                *c = '\0';
            while (!is_special(*--c))
                *u = c;
            /***************************/
        }
        if (is_redir(*c)) { /* If < or > */
            if (*c == '<')
                redir_stdin = *u;
            else
                redir_stdout = *u;
            if ((u - v) != 98)
                u++;
        }
    }
    if ((u - v) == 98) /* empty input */
        return;

輸出結果：

➜  quiz7 gcc picosh.c
➜  quiz7 ./a.out
$ mkdir dir
$ ls
a.out  dir  http  picosh.c
$ echo hello world > x
$ cat < x | grep hello
hello world
$ ls /dev | wc -l
243
$

文字訊息不要用圖片展現！
:notes: jserv

測驗 2