不精确的取目录大小

 1 #include <stdlib.h>
 2 #include <sys/stat.h>
 3 #include <dirent.h>
 4 
 5 
 6 void GetDirSize(const char* dirname, int64_t* size) {
 7     ::DIR* dp = opendir(dirname);
 8     if (dp) {
 9         struct ::dirent* entry;
10         struct ::stat statbuf;
11         char entry_path[1024] = {0};
12         while ((entry = readdir(dp)) != NULL){
13             memset(entry_path, 0 , 1024);
14             sprintf(entry_path, "%s/%s", dirname, entry->d_name);
15             lstat(entry_path, &statbuf);
16             if (S_ISDIR(statbuf.st_mode)){
17                 if (strcmp(".", entry->d_name) &&
18                     strcmp("..", entry->d_name)){
19                     GetDirSize(entry_path, size);
20                 }
21             }
22             *size += statbuf.st_size;
23         }// while
24     }
25     else {
26        std::cout << __FILE__ <<"::"<< __LINE__ <<"::"<< __FUNCTION__ << std::endl;
27        std::cout << "Open dir:" <<dirname << " faild" << std::endl;
28        _exit(EXIT_FAILURE);
29     }
30 }
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