# std::filesystem::copy_symlink

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< cpp‎ | filesystem

Defined in header `<filesystem>` |  |
void copy_symlink( const std::filesystem::path & from, const std::filesystem::path & to); | (1) | (since C++17)
void copy_symlink( const std::filesystem::path & from, const std::filesystem::path & to, std::error_code & ec ) noexcept; | (2) | (since C++17)

Copies a symlink to another location.

1) Effectively calls f(read_symlink(from), to) where `f` is `create_symlink` or `create_directory_symlink` depending on whether `from` resolves to a file or directory.
2) Effectively calls f(read_symlink(from, ec), to, ec) where `f` is `create_symlink` or `create_directory_symlink` depending on whether `from` resolves to a file or directory.

### Parameters

from | - | path to a symbolic link to copy
to | - | destination path of the new symlink
ec | - | out-parameter for error reporting in the non-throwing overload

### Return value

(none)

### Exceptions

The overload that does not take a std::error_code & parameter throws `filesystem_error` on underlying OS API errors, constructed with `from` as the first path argument, `to` as the second path argument, and the OS error code as the error code argument. The overload taking a std::error_code & parameter sets it to the OS API error code if an OS API call fails, and executes ec.clear() if no errors occur. Any overload not marked `noexcept` may throw std::bad_alloc if memory allocation fails.

### See also

copy (C++17) | copies files or directories (function)
copy_file (C++17) | copies file contents (function)
create_symlinkcreate_directory_symlink (C++17)(C++17) | creates a symbolic link (function)
read_symlink (C++17) | obtains the target of a symbolic link (function)

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