🦄 refactor(C14, C15):

C15-进程/process_basic/myshell.c

@@ -0,0 +1,98 @@
+#include <glob.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <time.h>
+#include <unistd.h>
+
+#define DELIMS " \t\n"
+
+struct cmd_st
+{
+    glob_t globres;
+};
+
+
+static void prompt(void)
+{
+    printf("mysh-0.1$ ");
+}
+
+
+/**
+ * @brief    解析命令行
+ * @details
+ *           line 不加 const 是考虑以后可能加 alias 功能
+ *
+ * @param    line
+ * @param    res
+ */
+static void parse(char *line, struct cmd_st *res)
+{
+    char *tok;
+    int   i = 0;
+
+    //* 根据分隔符分割小串
+    // strtok();
+    while (1)
+    {
+        tok = strsep(&line, DELIMS);
+        if (NULL == tok)
+            break;
+
+        if ('\0' == tok[0])   // 判断是否为空串
+            continue;
+
+        // 用glob nocheck 来解析
+        // 用 i 来让第一次不追加
+        glob(tok, GLOB_NOCHECK | GLOB_APPEND * i, NULL, &res->globres);
+        i = 1;
+    }
+}
+
+int main(int argc, char **argv)
+{
+    char         *linebuf      = NULL;
+    size_t        linebuf_size = 0;
+    struct cmd_st cmd;
+    pid_t         pid;
+
+    while (1)
+    {
+        prompt();
+
+        if (getline(&linebuf, &linebuf_size, stdin) < 0)
+            break;
+
+        parse(linebuf, &cmd);
+
+        if (0)
+        {
+            /* dosomething */
+        }
+        else   // 外部命令
+        {
+            pid = fork();
+            if (pid < 0)
+            {
+                perror("fork");
+                exit(1);
+            }
+
+            if (0 == pid)   // child
+            {
+                execvp(cmd.globres.gl_pathv[0], cmd.globres.gl_pathv);
+                perror("execvp");
+                exit(1);
+            }
+            else   // parent
+            {
+                wait(NULL);
+            }
+        }
+    }
+
+    exit(0);
+}