Defined in header <filesystem> | ||
|---|---|---|
struct space_info {
std::uintmax_t capacity;
std::uintmax_t free;
std::uintmax_t available;
};
| (since C++17) |
Represents the filesystem information as determined by filesystem::space.
| capacity | total size of the filesystem, in bytes (public member object) |
| free | free space on the filesystem, in bytes (public member object) |
| available | free space available to a non-privileged process (may be equal or less than free) (public member object) |
| operator==
(C++20) | compares two space_infos (function) |
friend bool operator==( const space_info&, const space_info& ) = default; | (since C++20) |
Checks if capacity, free and available of both arguments are equal respectively.
This function is not visible to ordinary unqualified or qualified lookup, and can only be found by argument-dependent lookup when std::filesystem::space_info is an associated class of the arguments.
The != operator is synthesized from operator==.
#include <iostream>
#include <filesystem>
#include <cstdint>
void print_space_info(auto const& dirs, int width = 15)
{
(std::cout << std::left).imbue(std::locale("en_US.UTF-8"));
for (const auto s : {"Capacity", "Free", "Available", "Dir"})
std::cout << "│ " << std::setw(width) << s << ' ';
std::cout << '\n';
std::error_code ec;
for (auto const& dir : dirs) {
const std::filesystem::space_info si = std::filesystem::space(dir, ec);
std::cout
<< "│ " << std::setw(width) << static_cast<std::intmax_t>(si.capacity) << ' '
<< "│ " << std::setw(width) << static_cast<std::intmax_t>(si.free) << ' '
<< "│ " << std::setw(width) << static_cast<std::intmax_t>(si.available) << ' '
<< "│ " << dir << '\n';
}
}
int main()
{
const auto dirs = { "/dev/null", "/tmp", "/home", "/null" };
print_space_info(dirs);
}Possible output:
│ Capacity │ Free │ Available │ Dir │ 84,417,331,200 │ 24,069,705,728 │ 21,492,748,288 │ /dev/null │ 84,417,331,200 │ 24,069,705,728 │ 21,492,748,288 │ /tmp │ 250,321,567,744 │ 37,623,181,312 │ 25,152,159,744 │ /home │ -1 │ -1 │ -1 │ /null
|
(C++17) | determines available free space on the file system (function) |
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