std::experimental::filesystem::space_info(3)

NAME
std::experimental::filesystem::space_info - std::experimental::filesystem::space_info

Synopsis
   Defined in header <experimental/filesystem>
   struct space_info {
   uintmax_t capacity;
   uintmax_t free; (filesystem TS)
   uintmax_t available;
   };
   Represents the filesystem information as determined by space
   The members have the following meaning:
     * capacity -- total size of the filesystem, in bytes
     * free -- free space on the filesystem, in bytes
     * available -- free space available to a non-privileged process (may be equal or
       less than free)

Example
// Run this code
 #include <iostream>
 #include <experimental/filesystem>
 namespace fs = std::experimental::filesystem;
 int main()
 {
     fs::space_info devi = fs::space("/dev/null");
     fs::space_info tmpi = fs::space("/tmp");
     std::cout << ". Capacity Free Available\n"
               << "/dev: " << devi.capacity << " "
               << devi.free << " " << devi.available << '\n'
               << "/tmp: " << tmpi.capacity << " "
               << tmpi.free << " " << tmpi.available << '\n';
 }

Possible output:
 . Capacity Free Available
 /dev: 4175114240 4175110144 4175110144
 /tmp: 420651237376 411962273792 390570749952

See also
   space determines available free space on the file system
         (function)