std::experimental::filesystem:: space
|
Defined in header
<experimental/filesystem>
|
||
|
space_info space
(
const
path
&
p
)
;
space_info space ( const path & p, error_code & ec ) noexcept ; |
(filesystem TS) | |
Determines the information about the filesystem on which the pathname
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 static_cast < std:: uintmax_t > ( - 1 ) .
The non-throwing overload sets all members to static_cast < std:: uintmax_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 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 hasNotes
space_info. available may be less than space_info. free .
Example
#include <experimental/filesystem> #include <iostream> 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
|
information about free and available space on the filesystem
(class) |