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std::experi...stem::space(3) C++ Standard Libary std::experi...stem::space(3) NAME std::experimental::filesystem::space - std::experimental::filesys- tem::space Synopsis Defined in header <experimental/filesystem> space_info space(const path& p); (filesys- tem TS) space_info space(const path& p, error_code& ec) noexcept; Determines the information about the filesystem on which the path- name p is located, as if by POSIX statvfs Populates and returns an object of type space_info, set from the members of the POSIX struct statvfs as follows * space_info.capacity is set as if by f_blocks*f_frsize * space_info.free is set to f_bfree*f_frsize * space_info.available is set to f_bavail*f_frsize * Any member that could not be determined is set to sta- tic_cast<uintmax_t>(-1) The non-throwing overload sets all members to static_cast<uint- max_t>(-1) on error. Parameters p - path to examine ec - out-parameter for error reporting in the non-throwing overload Return value The filesystem information (a space_info object) Exceptions The overload that does not take a 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 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 Notes space_info.available may be less than space_info.free Example // Run this code #include <iostream> #include <experimental/filesystem> namespace fs = std::experimental::filesystem; int main() { fs::space_info devi = fs::space("/dev/null"); fs::space_info tmpi = fs::space("/tmp"); std::cout << ". Capacity Free Available\n" << "/dev: " << devi.capacity << " " << devi.free << " " << devi.available << '\n' << "/tmp: " << tmpi.capacity << " " << tmpi.free << " " << tmpi.available << '\n'; } Possible output: . Capacity Free Available /dev: 4175114240 4175110144 4175110144 /tmp: 420651237376 411962273792 390570749952 See also space_info information about free and available space on the filesystem (class) http://cppreference.com 2022.07.31 std::experi...stem::space(3)
NAME | Synopsis | Parameters | Return value | Exceptions | Notes | Example | Possible output: | See also
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