std::experimental::filesystem:: hard_link_count
From cppreference.com
<
cpp
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experimental
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fs
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Defined in header
<experimental/filesystem>
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std::
uintmax_t
hard_link_count
(
const
path
&
p
)
;
std:: uintmax_t hard_link_count ( const path & p, error_code & ec ) ; |
(1) | (filesystem TS) |
Returns the number of hard links for the filesystem object identified by path p .
The non-throwing overload returns static_cast < uintmax_t > ( - 1 ) on errors.
Parameters
| p | - | path to examine |
| ec | - | out-parameter for error reporting in the non-throwing overload |
Return value
The number of hard links for p .
Exceptions
The overload that does not take an error_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 an 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 POSIX-style filesystem, each directory has at least 2 hard links: // itself and the special member pathname "." fs::path p = fs::current_path(); std::cout << "Number of hard links for current path is " << fs::hard_link_count(p) << '\n'; // each ".." is a hard link to the parent directory, so the total number // of hard links for any directory is 2 plus number of direct subdirectories p = fs::current_path() / ".."; // each dot-dot is a hard link to parent std::cout << "Number of hard links for .. is " << fs::hard_link_count(p) << '\n'; }
Output:
Number of hard links for current path is 2 Number of hard links for .. is 3
See also
|
creates a hard link
(function) |