std::experimental::filesystem::read_symlink
From cppreference.com
< cpp | experimental | fs
| Defined in header <experimental/filesystem>
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| path read_symlink( const path& p ); path read_symlink( const path& p, error_code& ec ); |
(filesystem TS) | |
If the path p refers to a symbolic link, returns a new path object which refers to the target of that symbolic link.
It is an error if p does not refer to a symbolic link.
The non-throwing overload returns an empty path on errors.
Parameters
| p | - | path to a symlink |
| ec | - | out-parameter for error reporting in the non-throwing overload |
Return value
The target of the symlink (which may not necessarily exist).
Exceptions
The overload that does not take aerror_code& parameter throws filesystem_error on underlying OS API errors, constructed with p as the first argument and the OS error code as the error code argument. std::bad_alloc may be thrown if memory allocation fails. The overload taking a 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. This overload has noexcept specification:
noexcept
Example
Run this code
#include <experimental/filesystem> #include <iostream> namespace fs = std::experimental::filesystem; int main() { // on a typical Linux system, /lib/libc.so.6 is a symlink fs::path p = "/lib/libc.so.6"; if (exists(p) && is_symlink(p)) std::cout << p << " -> " << read_symlink(p) << '\n'; else std::cout << p << " does not exist or is not a symlink\n"; }
Possible output:
"/lib/libc.so.6" -> "libc-2.12.so"
See also
| checks whether the argument refers to a symbolic link (function) | |
| creates a symbolic link (function) | |
| copies a symbolic link (function) | |
| determines file attributes determines file attributes, checking the symlink target (function) |