Resolves ".." and "." components of the path syntactically without consulting

the file system.

Returns the current directory. If the current directory cannot be determined,

this function will terminate the process.

Returns whether the given path is a directory.

Writes the given data to the file at the given path. Returns true if the data

was successfully written, otherwise returns false.

Returns the absolute path of a possibly relative path.

It doesn't consult the filesystem or simplify the path.

Returns the directory name component of the given path.

Returns whether the given path is a directory. If |path| is relative, resolve

it with |root_fd| as reference. See |openat(2)|.

Returns the basename component of the given path by stripping everything up

to and including the last slash.

Create a directory at the given path. If necessary, creates any intermediary

directory.

Create a directory at the given path. If necessary, creates any intermediary

directory. If |path| is relative, resolve it with |root_fd| as reference. See

|openat(2)|.

List the contents of a directory. If returns false, errno will be set.

Returns true if |path| is a valid Fuchsia name per the fuchsia.io/Name rules:

* It cannot be longer than [`MAX_NAME_LENGTH`] (255 bytes).

* It cannot be empty.

* It cannot be ".." (dot-dot).

* It cannot be "." (single dot).

* It cannot contain "/".

* It cannot contain embedded NUL.

Atomically creates |filename| under |dirfd| with |data|.

This is done by writing |data| to a temporary file named "<filename>.tmp" in

|dirfd|, syncing the temporary file, renaming it to |filename|, and syncing

|dirfd|. |dirfd| must be a valid open directory file descriptor (not

AT_FDCWD), and |filename| must be a valid single-component filename (no '/').

Returns true if the file was successfully written, otherwise returns false.

Note that power failure after the temporary file is created, but before it is

renamed, will result in "<filename>.tmp" existing in |dirfd|. A subsequent

call for the same |filename| will overwrite and clean up the temporary file,

but if this function is never called again for |filename|, the temporary file

will remain. Callers must not invoke this concurrently with the same |dirfd|

and |filename|.

List the contents of a directory. If returns false, errno will be set. If |path| is relative,

resolve it with |root_fd| as reference. See |openat(2)|.

Reads the contents of the file at the given path or file descriptor and

stores the data in result. Returns true if the file was read successfully,

otherwise returns false. If this function returns false, |result| will be

the empty string.

Returns true if |path| is a valid Fuchsia path in canonical form per the

fuchsia.io/Path rules:

* It cannot be empty.

* It cannot be longer than [`MAX_PATH_LENGTH`] (4095 bytes).

* It cannot have a leading "/".

* It cannot have a trailing "/".

* Each component must be a valid name. See |IsValidName|.

Reads the contents of the file at the given path or file descriptor and stores the data in

result. Returns true if the file was read successfully, otherwise returns

false. If this function returns false, |result| will be the empty string.

Delete the file or directory at the given path. If recursive is true, and

path is a directory, also delete the directory's content.

Returns whether the given path is a file.

Delete the file or directory at the given path. If recursive is true, and

path is a directory, also delete the directory's content. If |path| is

relative, resolve it with |root_fd| as reference. See |openat(2)|.

If the given path is a file, set size to the size of the file.

Joins two paths together.

Regardless if |path1| has a trailing '/' or |path2| has a leading '/', there

will be only one '/' in-between in the joined path.

Note that if either path is "" then the other path is returned unchanged.

JoinPath("/foo", "bar") -> "/foo/bar"

JoinPath("/foo", "/bar") -> "/foo/bar"

JoinPath("/foo/", "bar") -> "/foo/bar"

JoinPath("/foo/", "/bar") -> "/foo/bar"

JoinPath("", "") -> ""

JoinPath("", "/foo") -> "/foo"

JoinPath("", "foo") -> "foo"

JoinPath("/foo", "") -> "/foo"

JoinPath("foo", "") -> "foo"

JoinPath("/foo/", "") -> "/foo/"

JoinPath("foo/", "") -> "foo/"