std::filesystem::read_symlink
From cppreference.com
< cpp | filesystem
Defined in header <filesystem>
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std::filesystem::path read_symlink(
const
std::filesystem::path
& p )
;
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(1) | (since C++17) |
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std::filesystem::path read_symlink(
const
std::filesystem::path
& p,
std::error_code & ec ) ; |
(2) | (since C++17) |
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
Any overload not marked noexcept may throw std::bad_alloc if memory allocation fails.
2) Sets a
std::error_code&
parameter to the OS API error code if an OS API call fails, and executes
ec.
clear
()
Example
Run this code
#include <filesystem> #include <iostream> namespace fs = std::filesystem; int main() { for (fs::path p : {"/usr/bin/gcc", "/bin/cat", "/bin/mouse"}) { std::cout << p; fs::exists(p) ? fs::is_symlink(p) ? std::cout << " -> " << fs::read_symlink(p) << '\n' : std::cout << " exists but it is not a symlink\n" : std::cout << " does not exist\n"; } }
Possible output:
"/usr/bin/gcc" -> "gcc-5" "/bin/cat" exists but it is not a symlink "/bin/mouse" does not exist
See also
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(C++17)
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checks whether the argument refers to a symbolic link (function) |
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(C++17)(C++17)
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creates a symbolic link (function) |
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(C++17)
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copies a symbolic link (function) |
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(C++17)(C++17)
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determines file attributes determines file attributes, checking the symlink target (function) |