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std::filesystem::temp_directory_path

From cppreference.com
 
 
 
Defined in header <filesystem>
path temp_directory_path();
path temp_directory_path( std::error_code& ec );
(1) (since C++17)

Returns the directory location suitable for temporary files.

Contents

[edit] Parameters

(none)

[edit] Return value

A directory suitable for temporary files. The path is guaranteed to exist and to be a directory. The overload that takes error_code& argument returns an empty path on error.

[edit] Exceptions

The overload that does not take a std::error_code& parameter throws filesystem_error on underlying OS API errors, constructed with path to be returned 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 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.

[edit] Notes

On POSIX systems, the path may be the one specified in the environment variables TMPDIR, TMP, TEMP, TEMPDIR, and, if none of them are specified, the path "/tmp" is returned.

On Windows systems, the path is typically the one returned by GetTempPath

[edit] Example

#include <iostream>
#include <filesystem>
namespace fs = std::filesystem;
int main()
{
    std::cout << "Temp directory is " << fs::temp_directory_path() << '\n';
}

Possible output:

Temp directory is "C:\Windows\TEMP\"

[edit] See also

creates and opens a temporary, auto-removing file
(function) [edit]