调整代码格式

client.c

@@ -132,6 +132,7 @@ int rcopy_client(char *src, char *host, unsigned short port, char *r_src, int ty
         exit(1);
       }
 
+      // 发送文件
       if (r.type == TRANSFILE) {
         FILE *out;
         if ((out = fopen(src, "rb")) != NULL) {
@@ -147,6 +148,7 @@ int rcopy_client(char *src, char *host, unsigned short port, char *r_src, int ty
         }
       }
 
+      // 读取socket数据
       int status, len;
       len = read(sockfd, &status, sizeof(int));
       if (len != sizeof(int)) {
@@ -154,6 +156,7 @@ int rcopy_client(char *src, char *host, unsigned short port, char *r_src, int ty
         exit(1);
       } else {
         if (status == SENDFILE) {
+          // 获取pid
           pid_t pid = fork();
           if (pid == 0) {
             close(sockfd); // child will initate a new connection.
@@ -207,6 +210,7 @@ int rcopy_client(char *src, char *host, unsigned short port, char *r_src, int ty
     while (fcalls > 0) {
       wait(&status);
       if (WIFEXITED(status)) {
+        // 从子进程的终止状态中提取出退出状态码
         pid = WEXITSTATUS(status);
         if (!final) {
           final = pid;