std::experimental::filesystem::equivalent

Header: <experimental/filesystem>

Checks whether the paths p1 and p2 refer to the same file or directory and have the same file status as determined by status (symlinks are followed).

# Declarations

bool equivalent( const path& p1, const path& p2 );
bool equivalent( const path& p1, const path& p2, error_code& ec );

(filesystem TS)

# Parameters

# Return value

true if the p1 and p2 refer to the same file or directory and their file status is the same. false otherwise.

# Notes

Two paths are considered to resolve to the same file system entity if st_dev and st_ino of their POSIX stat structure, obtained as if by POSIX stat, are equal (meaning, the files are located on the same device at the same location).

In particular, all hard links for the same file or directory are equivalent, and a symlink and its target on the same file system are equivalent.

# Example

#include <cstdint>
#include <experimental/filesystem>
#include <iostream>
namespace fs = std::experimental::filesystem;
 
int main()
{
    // hard link equivalency
    fs::path p1 = ".";
    fs::path p2 = fs::current_path();
    if (fs::equivalent(p1, p2))
        std::cout << p1 << " is equivalent to " << p2 << '\n';
 
    // symlink equivalency
    fs::path p3 = "/lib/libc.so.6";
    fs::path p4 = p3.parent_path() / fs::read_symlink(p3);
    if (fs::equivalent(p3, p4))
        std::cout << p3 << " is equivalent to " << p4 << '\n';
}

# See also