pub struct ObjectPathBuf { /* private fields */ }
Implementations§
Source§impl ObjectPathBuf
An owned, mutable Dbus object path akin to String
or std::path::PathBuf
.
impl ObjectPathBuf
An owned, mutable Dbus object path akin to String
or std::path::PathBuf
.
push
, pop
and others can be used used to modify the ObjectPathBuf
in-place.
ObjectPathBuf
implements Deref
to ObjectPath
allowing for all methods on ObjectPath
to be used on ObjectPathBuf
.
§Notes
-
ObjectPathBuf
is stored as a wrapper aroundOption<PathBuf>
, where theNone
case is equivelent to a root path. -
As a result of the above point, root paths (a single
/
seperator) are special case that does not result in a heap allocation. This means thatnew
does not result in an allocation on its own.
Sourcepub fn new() -> ObjectPathBuf
pub fn new() -> ObjectPathBuf
Create a new root path consisting of a single /
seperator.
The ObjectPathBuf
returned by this method does not result in an allocation until it is modified.
Sourcepub fn with_capacity(capacity: usize) -> ObjectPathBuf
pub fn with_capacity(capacity: usize) -> ObjectPathBuf
Create a new root path and preallocate space on the heap for additions to the path.
If the size of the object path is known ahead time, this method can provide a performance benefit by avoid multiple reallocations.
When capacity
is zero this method is equivelent to new
.
Sourcepub fn as_object_path(&self) -> &ObjectPath
pub fn as_object_path(&self) -> &ObjectPath
Coerces to a ObjectPath
slice.
Sourcepub fn clear(&mut self)
pub fn clear(&mut self)
Truncates the object path into a root path.
This does not affect the capacity of the ObjectPathBuf
.
Sourcepub fn push(&mut self, path: &ObjectPath)
pub fn push(&mut self, path: &ObjectPath)
Append an ObjectPath
to this one.
Sourcepub fn push_path<P: AsRef<Path>>(&mut self, path: P)
pub fn push_path<P: AsRef<Path>>(&mut self, path: P)
Append a Path
to this one.
If path
is invalid this method panics.
If it is unknown if path
is valid use [push_path_checked
] instead.
§Panics
path
must be a valid object path with two exceptions:
path
can be relative or empty.
If the above conditions are not met this function will panic.
§Examples
use std::convert::TryFrom;
use async_rustbus::rustbus_core::path::{ObjectPath, ObjectPathBuf};
let target = ObjectPath::from_str("/example/path/to_append").unwrap();
let mut opb0 = ObjectPathBuf::try_from("/example").unwrap();
let mut opb1 = opb0.clone();
opb0.push_path("/path/to_append");
opb1.push_path("path/to_append");
assert_eq!(&opb0, target);
assert_eq!(&opb1, target);
These should panic for different reasons.
use std::convert::TryFrom;
use async_rustbus::rustbus_core::path::{ObjectPath, ObjectPathBuf};
let target = ObjectPath::from_str("/example/path/to_append").unwrap();
let mut original = ObjectPathBuf::try_from("/example").unwrap();
// Each line panics for different reasons
original.push_path("/path//consecutive/slash");
original.push_path("/p@th");
Sourcepub fn push_path_checked<P: AsRef<Path>>(
&mut self,
path: P,
) -> Result<(), InvalidObjectPath>
pub fn push_path_checked<P: AsRef<Path>>( &mut self, path: P, ) -> Result<(), InvalidObjectPath>
Check and append path
to the ObjectPathBuf
if it is valid.
path
must be a valid DBus object path with two exceptions:
path
can be relative or empty.
If these conditions are not met then an Err
is returned.
§Examples
use std::convert::TryFrom;
use async_rustbus::rustbus_core::path::{ObjectPath, ObjectPathBuf};
let target = ObjectPath::from_str("/example/path/to_append").unwrap();
let mut opb0 = ObjectPathBuf::try_from("/example").unwrap();
let mut opb1 = opb0.clone();
opb0.push_path_checked("/path/to_append").unwrap();
opb1.push_path_checked("path/to_append").unwrap();
assert_eq!(&opb0, target);
assert_eq!(&opb1, target);
opb0.push_path_checked("/path//consecutive/slash").unwrap_err();
opb1.push_path_checked("/p@th").unwrap_err();
Sourcepub fn pop(&mut self) -> bool
pub fn pop(&mut self) -> bool
Truncate the ObjectPathBuf
to parent
.
Returns true if the path changed.
pub fn reserve(&mut self, additional: usize)
pub fn reserve_exact(&mut self, additional: usize)
Methods from Deref<Target = ObjectPath>§
Sourcepub fn as_str(&self) -> &str
pub fn as_str(&self) -> &str
Get the ObjectPath
as a &str
.
Unlike ordinary std::path::Path
, ObjectPath
s are always valid Rust str
s making this possible.
Sourcepub fn strip_prefix<P: AsRef<Path> + ?Sized>(
&self,
p: &P,
) -> Result<&ObjectPath, StripPrefixError>
pub fn strip_prefix<P: AsRef<Path> + ?Sized>( &self, p: &P, ) -> Result<&ObjectPath, StripPrefixError>
Strip the prefix of the ObjectPath
.
Unlike Path::strip_prefix
this method will always leave the path will always remain absolute.
§Examples
use async_rustbus::rustbus_core::path::ObjectPath;
let original = ObjectPath::from_str("/example/path/to_strip").unwrap();
let target = ObjectPath::from_str("/path/to_strip").unwrap();
/* These two lines are equivelent because paths must always remain absolute,
so the root '/' is readded in the second example.
Note the second line is not a valid ObjectPath */
let stripped0 = original.strip_prefix("/example").unwrap();
let stripped1 = original.strip_prefix("/example/").unwrap();
assert_eq!(stripped0, target);
assert_eq!(stripped1, target);
original.strip_prefix("/example/other").unwrap_err();
original.strip_prefix("/example/pa").unwrap_err();
// Because the only thing stripped is the root sep this does nothing as it gets readded.
let stripped2 = original.strip_prefix("/").unwrap();
assert_eq!(stripped2, original);
let stripped3 = original.strip_prefix(original).unwrap();
assert_eq!(stripped3, ObjectPath::root_path());
Sourcepub fn parent(&self) -> Option<&ObjectPath>
pub fn parent(&self) -> Option<&ObjectPath>
Get the parent of the ObjectPath
by removing the last element.
If the ObjectPath
is a root path then None
is returned.
Sourcepub fn file_name(&self) -> Option<&str>
pub fn file_name(&self) -> Option<&str>
Retrieves the last element of the ObjectPath
.
If the ObjectPath
is a root path then None
is returned.
Sourcepub fn components(&self) -> impl Iterator<Item = &str>
pub fn components(&self) -> impl Iterator<Item = &str>
Returns an Iterator
over the elements of an ObjectPath
.
pub fn to_object_path_buf(&self) -> ObjectPathBuf
Methods from Deref<Target = Path>§
1.0.0 · Sourcepub fn to_str(&self) -> Option<&str>
pub fn to_str(&self) -> Option<&str>
Yields a &str
slice if the Path
is valid unicode.
This conversion may entail doing a check for UTF-8 validity. Note that validation is performed because non-UTF-8 strings are perfectly valid for some OS.
§Examples
use std::path::Path;
let path = Path::new("foo.txt");
assert_eq!(path.to_str(), Some("foo.txt"));
1.0.0 · Sourcepub fn to_string_lossy(&self) -> Cow<'_, str>
pub fn to_string_lossy(&self) -> Cow<'_, str>
Converts a Path
to a Cow<str>
.
Any non-UTF-8 sequences are replaced with
U+FFFD REPLACEMENT CHARACTER
.
§Examples
Calling to_string_lossy
on a Path
with valid unicode:
use std::path::Path;
let path = Path::new("foo.txt");
assert_eq!(path.to_string_lossy(), "foo.txt");
Had path
contained invalid unicode, the to_string_lossy
call might
have returned "fo�.txt"
.
1.0.0 · Sourcepub fn to_path_buf(&self) -> PathBuf
pub fn to_path_buf(&self) -> PathBuf
1.0.0 · Sourcepub fn is_absolute(&self) -> bool
pub fn is_absolute(&self) -> bool
Returns true
if the Path
is absolute, i.e., if it is independent of
the current directory.
-
On Unix, a path is absolute if it starts with the root, so
is_absolute
andhas_root
are equivalent. -
On Windows, a path is absolute if it has a prefix and starts with the root:
c:\windows
is absolute, whilec:temp
and\temp
are not.
§Examples
use std::path::Path;
assert!(!Path::new("foo.txt").is_absolute());
1.0.0 · Sourcepub fn is_relative(&self) -> bool
pub fn is_relative(&self) -> bool
Returns true
if the Path
is relative, i.e., not absolute.
See is_absolute
’s documentation for more details.
§Examples
use std::path::Path;
assert!(Path::new("foo.txt").is_relative());
1.0.0 · Sourcepub fn has_root(&self) -> bool
pub fn has_root(&self) -> bool
Returns true
if the Path
has a root.
-
On Unix, a path has a root if it begins with
/
. -
On Windows, a path has a root if it:
- has no prefix and begins with a separator, e.g.,
\windows
- has a prefix followed by a separator, e.g.,
c:\windows
but notc:windows
- has any non-disk prefix, e.g.,
\\server\share
- has no prefix and begins with a separator, e.g.,
§Examples
use std::path::Path;
assert!(Path::new("/etc/passwd").has_root());
1.0.0 · Sourcepub fn parent(&self) -> Option<&Path>
pub fn parent(&self) -> Option<&Path>
Returns the Path
without its final component, if there is one.
This means it returns Some("")
for relative paths with one component.
Returns None
if the path terminates in a root or prefix, or if it’s
the empty string.
§Examples
use std::path::Path;
let path = Path::new("/foo/bar");
let parent = path.parent().unwrap();
assert_eq!(parent, Path::new("/foo"));
let grand_parent = parent.parent().unwrap();
assert_eq!(grand_parent, Path::new("/"));
assert_eq!(grand_parent.parent(), None);
let relative_path = Path::new("foo/bar");
let parent = relative_path.parent();
assert_eq!(parent, Some(Path::new("foo")));
let grand_parent = parent.and_then(Path::parent);
assert_eq!(grand_parent, Some(Path::new("")));
let great_grand_parent = grand_parent.and_then(Path::parent);
assert_eq!(great_grand_parent, None);
1.28.0 · Sourcepub fn ancestors(&self) -> Ancestors<'_>
pub fn ancestors(&self) -> Ancestors<'_>
Produces an iterator over Path
and its ancestors.
The iterator will yield the Path
that is returned if the parent
method is used zero
or more times. If the parent
method returns None
, the iterator will do likewise.
The iterator will always yield at least one value, namely Some(&self)
. Next it will yield
&self.parent()
, &self.parent().and_then(Path::parent)
and so on.
§Examples
use std::path::Path;
let mut ancestors = Path::new("/foo/bar").ancestors();
assert_eq!(ancestors.next(), Some(Path::new("/foo/bar")));
assert_eq!(ancestors.next(), Some(Path::new("/foo")));
assert_eq!(ancestors.next(), Some(Path::new("/")));
assert_eq!(ancestors.next(), None);
let mut ancestors = Path::new("../foo/bar").ancestors();
assert_eq!(ancestors.next(), Some(Path::new("../foo/bar")));
assert_eq!(ancestors.next(), Some(Path::new("../foo")));
assert_eq!(ancestors.next(), Some(Path::new("..")));
assert_eq!(ancestors.next(), Some(Path::new("")));
assert_eq!(ancestors.next(), None);
1.0.0 · Sourcepub fn file_name(&self) -> Option<&OsStr>
pub fn file_name(&self) -> Option<&OsStr>
Returns the final component of the Path
, if there is one.
If the path is a normal file, this is the file name. If it’s the path of a directory, this is the directory name.
Returns None
if the path terminates in ..
.
§Examples
use std::path::Path;
use std::ffi::OsStr;
assert_eq!(Some(OsStr::new("bin")), Path::new("/usr/bin/").file_name());
assert_eq!(Some(OsStr::new("foo.txt")), Path::new("tmp/foo.txt").file_name());
assert_eq!(Some(OsStr::new("foo.txt")), Path::new("foo.txt/.").file_name());
assert_eq!(Some(OsStr::new("foo.txt")), Path::new("foo.txt/.//").file_name());
assert_eq!(None, Path::new("foo.txt/..").file_name());
assert_eq!(None, Path::new("/").file_name());
1.7.0 · Sourcepub fn strip_prefix<P>(&self, base: P) -> Result<&Path, StripPrefixError>
pub fn strip_prefix<P>(&self, base: P) -> Result<&Path, StripPrefixError>
Returns a path that, when joined onto base
, yields self
.
§Errors
If base
is not a prefix of self
(i.e., starts_with
returns false
), returns Err
.
§Examples
use std::path::{Path, PathBuf};
let path = Path::new("/test/haha/foo.txt");
assert_eq!(path.strip_prefix("/"), Ok(Path::new("test/haha/foo.txt")));
assert_eq!(path.strip_prefix("/test"), Ok(Path::new("haha/foo.txt")));
assert_eq!(path.strip_prefix("/test/"), Ok(Path::new("haha/foo.txt")));
assert_eq!(path.strip_prefix("/test/haha/foo.txt"), Ok(Path::new("")));
assert_eq!(path.strip_prefix("/test/haha/foo.txt/"), Ok(Path::new("")));
assert!(path.strip_prefix("test").is_err());
assert!(path.strip_prefix("/te").is_err());
assert!(path.strip_prefix("/haha").is_err());
let prefix = PathBuf::from("/test/");
assert_eq!(path.strip_prefix(prefix), Ok(Path::new("haha/foo.txt")));
1.0.0 · Sourcepub fn starts_with<P>(&self, base: P) -> bool
pub fn starts_with<P>(&self, base: P) -> bool
Determines whether base
is a prefix of self
.
Only considers whole path components to match.
§Examples
use std::path::Path;
let path = Path::new("/etc/passwd");
assert!(path.starts_with("/etc"));
assert!(path.starts_with("/etc/"));
assert!(path.starts_with("/etc/passwd"));
assert!(path.starts_with("/etc/passwd/")); // extra slash is okay
assert!(path.starts_with("/etc/passwd///")); // multiple extra slashes are okay
assert!(!path.starts_with("/e"));
assert!(!path.starts_with("/etc/passwd.txt"));
assert!(!Path::new("/etc/foo.rs").starts_with("/etc/foo"));
1.0.0 · Sourcepub fn ends_with<P>(&self, child: P) -> bool
pub fn ends_with<P>(&self, child: P) -> bool
Determines whether child
is a suffix of self
.
Only considers whole path components to match.
§Examples
use std::path::Path;
let path = Path::new("/etc/resolv.conf");
assert!(path.ends_with("resolv.conf"));
assert!(path.ends_with("etc/resolv.conf"));
assert!(path.ends_with("/etc/resolv.conf"));
assert!(!path.ends_with("/resolv.conf"));
assert!(!path.ends_with("conf")); // use .extension() instead
1.0.0 · Sourcepub fn file_stem(&self) -> Option<&OsStr>
pub fn file_stem(&self) -> Option<&OsStr>
Extracts the stem (non-extension) portion of self.file_name
.
The stem is:
None
, if there is no file name;- The entire file name if there is no embedded
.
; - The entire file name if the file name begins with
.
and has no other.
s within; - Otherwise, the portion of the file name before the final
.
§Examples
use std::path::Path;
assert_eq!("foo", Path::new("foo.rs").file_stem().unwrap());
assert_eq!("foo.tar", Path::new("foo.tar.gz").file_stem().unwrap());
§See Also
This method is similar to Path::file_prefix
, which extracts the portion of the file name
before the first .
Sourcepub fn file_prefix(&self) -> Option<&OsStr>
🔬This is a nightly-only experimental API. (path_file_prefix
)
pub fn file_prefix(&self) -> Option<&OsStr>
path_file_prefix
)Extracts the prefix of self.file_name
.
The prefix is:
None
, if there is no file name;- The entire file name if there is no embedded
.
; - The portion of the file name before the first non-beginning
.
; - The entire file name if the file name begins with
.
and has no other.
s within; - The portion of the file name before the second
.
if the file name begins with.
§Examples
use std::path::Path;
assert_eq!("foo", Path::new("foo.rs").file_prefix().unwrap());
assert_eq!("foo", Path::new("foo.tar.gz").file_prefix().unwrap());
§See Also
This method is similar to Path::file_stem
, which extracts the portion of the file name
before the last .
1.0.0 · Sourcepub fn extension(&self) -> Option<&OsStr>
pub fn extension(&self) -> Option<&OsStr>
Extracts the extension (without the leading dot) of self.file_name
, if possible.
The extension is:
None
, if there is no file name;None
, if there is no embedded.
;None
, if the file name begins with.
and has no other.
s within;- Otherwise, the portion of the file name after the final
.
§Examples
use std::path::Path;
assert_eq!("rs", Path::new("foo.rs").extension().unwrap());
assert_eq!("gz", Path::new("foo.tar.gz").extension().unwrap());
1.0.0 · Sourcepub fn join<P>(&self, path: P) -> PathBuf
pub fn join<P>(&self, path: P) -> PathBuf
Creates an owned PathBuf
with path
adjoined to self
.
If path
is absolute, it replaces the current path.
See PathBuf::push
for more details on what it means to adjoin a path.
§Examples
use std::path::{Path, PathBuf};
assert_eq!(Path::new("/etc").join("passwd"), PathBuf::from("/etc/passwd"));
assert_eq!(Path::new("/etc").join("/bin/sh"), PathBuf::from("/bin/sh"));
1.0.0 · Sourcepub fn with_file_name<S>(&self, file_name: S) -> PathBuf
pub fn with_file_name<S>(&self, file_name: S) -> PathBuf
Creates an owned PathBuf
like self
but with the given file name.
See PathBuf::set_file_name
for more details.
§Examples
use std::path::{Path, PathBuf};
let path = Path::new("/tmp/foo.png");
assert_eq!(path.with_file_name("bar"), PathBuf::from("/tmp/bar"));
assert_eq!(path.with_file_name("bar.txt"), PathBuf::from("/tmp/bar.txt"));
let path = Path::new("/tmp");
assert_eq!(path.with_file_name("var"), PathBuf::from("/var"));
1.0.0 · Sourcepub fn with_extension<S>(&self, extension: S) -> PathBuf
pub fn with_extension<S>(&self, extension: S) -> PathBuf
Creates an owned PathBuf
like self
but with the given extension.
See PathBuf::set_extension
for more details.
§Examples
use std::path::{Path, PathBuf};
let path = Path::new("foo.rs");
assert_eq!(path.with_extension("txt"), PathBuf::from("foo.txt"));
let path = Path::new("foo.tar.gz");
assert_eq!(path.with_extension(""), PathBuf::from("foo.tar"));
assert_eq!(path.with_extension("xz"), PathBuf::from("foo.tar.xz"));
assert_eq!(path.with_extension("").with_extension("txt"), PathBuf::from("foo.txt"));
Sourcepub fn with_added_extension<S>(&self, extension: S) -> PathBuf
🔬This is a nightly-only experimental API. (path_add_extension
)
pub fn with_added_extension<S>(&self, extension: S) -> PathBuf
path_add_extension
)Creates an owned PathBuf
like self
but with the extension added.
See PathBuf::add_extension
for more details.
§Examples
#![feature(path_add_extension)]
use std::path::{Path, PathBuf};
let path = Path::new("foo.rs");
assert_eq!(path.with_added_extension("txt"), PathBuf::from("foo.rs.txt"));
let path = Path::new("foo.tar.gz");
assert_eq!(path.with_added_extension(""), PathBuf::from("foo.tar.gz"));
assert_eq!(path.with_added_extension("xz"), PathBuf::from("foo.tar.gz.xz"));
assert_eq!(path.with_added_extension("").with_added_extension("txt"), PathBuf::from("foo.tar.gz.txt"));
1.0.0 · Sourcepub fn components(&self) -> Components<'_>
pub fn components(&self) -> Components<'_>
Produces an iterator over the Component
s of the path.
When parsing the path, there is a small amount of normalization:
-
Repeated separators are ignored, so
a/b
anda//b
both havea
andb
as components. -
Occurrences of
.
are normalized away, except if they are at the beginning of the path. For example,a/./b
,a/b/
,a/b/.
anda/b
all havea
andb
as components, but./a/b
starts with an additionalCurDir
component. -
A trailing slash is normalized away,
/a/b
and/a/b/
are equivalent.
Note that no other normalization takes place; in particular, a/c
and a/b/../c
are distinct, to account for the possibility that b
is a symbolic link (so its parent isn’t a
).
§Examples
use std::path::{Path, Component};
use std::ffi::OsStr;
let mut components = Path::new("/tmp/foo.txt").components();
assert_eq!(components.next(), Some(Component::RootDir));
assert_eq!(components.next(), Some(Component::Normal(OsStr::new("tmp"))));
assert_eq!(components.next(), Some(Component::Normal(OsStr::new("foo.txt"))));
assert_eq!(components.next(), None)
1.0.0 · Sourcepub fn iter(&self) -> Iter<'_>
pub fn iter(&self) -> Iter<'_>
Produces an iterator over the path’s components viewed as OsStr
slices.
For more information about the particulars of how the path is separated
into components, see components
.
§Examples
use std::path::{self, Path};
use std::ffi::OsStr;
let mut it = Path::new("/tmp/foo.txt").iter();
assert_eq!(it.next(), Some(OsStr::new(&path::MAIN_SEPARATOR.to_string())));
assert_eq!(it.next(), Some(OsStr::new("tmp")));
assert_eq!(it.next(), Some(OsStr::new("foo.txt")));
assert_eq!(it.next(), None)
1.0.0 · Sourcepub fn display(&self) -> Display<'_>
pub fn display(&self) -> Display<'_>
Returns an object that implements Display
for safely printing paths
that may contain non-Unicode data. This may perform lossy conversion,
depending on the platform. If you would like an implementation which
escapes the path please use Debug
instead.
§Examples
use std::path::Path;
let path = Path::new("/tmp/foo.rs");
println!("{}", path.display());
1.5.0 · Sourcepub fn metadata(&self) -> Result<Metadata, Error>
pub fn metadata(&self) -> Result<Metadata, Error>
Queries the file system to get information about a file, directory, etc.
This function will traverse symbolic links to query information about the destination file.
This is an alias to fs::metadata
.
§Examples
use std::path::Path;
let path = Path::new("/Minas/tirith");
let metadata = path.metadata().expect("metadata call failed");
println!("{:?}", metadata.file_type());
1.5.0 · Sourcepub fn symlink_metadata(&self) -> Result<Metadata, Error>
pub fn symlink_metadata(&self) -> Result<Metadata, Error>
Queries the metadata about a file without following symlinks.
This is an alias to fs::symlink_metadata
.
§Examples
use std::path::Path;
let path = Path::new("/Minas/tirith");
let metadata = path.symlink_metadata().expect("symlink_metadata call failed");
println!("{:?}", metadata.file_type());
1.5.0 · Sourcepub fn canonicalize(&self) -> Result<PathBuf, Error>
pub fn canonicalize(&self) -> Result<PathBuf, Error>
Returns the canonical, absolute form of the path with all intermediate components normalized and symbolic links resolved.
This is an alias to fs::canonicalize
.
§Examples
use std::path::{Path, PathBuf};
let path = Path::new("/foo/test/../test/bar.rs");
assert_eq!(path.canonicalize().unwrap(), PathBuf::from("/foo/test/bar.rs"));
1.5.0 · Sourcepub fn read_link(&self) -> Result<PathBuf, Error>
pub fn read_link(&self) -> Result<PathBuf, Error>
Reads a symbolic link, returning the file that the link points to.
This is an alias to fs::read_link
.
§Examples
use std::path::Path;
let path = Path::new("/laputa/sky_castle.rs");
let path_link = path.read_link().expect("read_link call failed");
1.5.0 · Sourcepub fn read_dir(&self) -> Result<ReadDir, Error>
pub fn read_dir(&self) -> Result<ReadDir, Error>
Returns an iterator over the entries within a directory.
The iterator will yield instances of io::Result<fs::DirEntry>
. New
errors may be encountered after an iterator is initially constructed.
This is an alias to fs::read_dir
.
§Examples
use std::path::Path;
let path = Path::new("/laputa");
for entry in path.read_dir().expect("read_dir call failed") {
if let Ok(entry) = entry {
println!("{:?}", entry.path());
}
}
1.5.0 · Sourcepub fn exists(&self) -> bool
pub fn exists(&self) -> bool
Returns true
if the path points at an existing entity.
Warning: this method may be error-prone, consider using try_exists()
instead!
It also has a risk of introducing time-of-check to time-of-use (TOCTOU) bugs.
This function will traverse symbolic links to query information about the destination file.
If you cannot access the metadata of the file, e.g. because of a
permission error or broken symbolic links, this will return false
.
§Examples
use std::path::Path;
assert!(!Path::new("does_not_exist.txt").exists());
§See Also
This is a convenience function that coerces errors to false. If you want to
check errors, call Path::try_exists
.
1.63.0 · Sourcepub fn try_exists(&self) -> Result<bool, Error>
pub fn try_exists(&self) -> Result<bool, Error>
Returns Ok(true)
if the path points at an existing entity.
This function will traverse symbolic links to query information about the
destination file. In case of broken symbolic links this will return Ok(false)
.
Path::exists()
only checks whether or not a path was both found and readable. By
contrast, try_exists
will return Ok(true)
or Ok(false)
, respectively, if the path
was verified to exist or not exist. If its existence can neither be confirmed nor
denied, it will propagate an Err(_)
instead. This can be the case if e.g. listing
permission is denied on one of the parent directories.
Note that while this avoids some pitfalls of the exists()
method, it still can not
prevent time-of-check to time-of-use (TOCTOU) bugs. You should only use it in scenarios
where those bugs are not an issue.
This is an alias for std::fs::exists
.
§Examples
use std::path::Path;
assert!(!Path::new("does_not_exist.txt").try_exists().expect("Can't check existence of file does_not_exist.txt"));
assert!(Path::new("/root/secret_file.txt").try_exists().is_err());
1.5.0 · Sourcepub fn is_file(&self) -> bool
pub fn is_file(&self) -> bool
Returns true
if the path exists on disk and is pointing at a regular file.
This function will traverse symbolic links to query information about the destination file.
If you cannot access the metadata of the file, e.g. because of a
permission error or broken symbolic links, this will return false
.
§Examples
use std::path::Path;
assert_eq!(Path::new("./is_a_directory/").is_file(), false);
assert_eq!(Path::new("a_file.txt").is_file(), true);
§See Also
This is a convenience function that coerces errors to false. If you want to
check errors, call fs::metadata
and handle its Result
. Then call
fs::Metadata::is_file
if it was Ok
.
When the goal is simply to read from (or write to) the source, the most
reliable way to test the source can be read (or written to) is to open
it. Only using is_file
can break workflows like diff <( prog_a )
on
a Unix-like system for example. See fs::File::open
or
fs::OpenOptions::open
for more information.
1.5.0 · Sourcepub fn is_dir(&self) -> bool
pub fn is_dir(&self) -> bool
Returns true
if the path exists on disk and is pointing at a directory.
This function will traverse symbolic links to query information about the destination file.
If you cannot access the metadata of the file, e.g. because of a
permission error or broken symbolic links, this will return false
.
§Examples
use std::path::Path;
assert_eq!(Path::new("./is_a_directory/").is_dir(), true);
assert_eq!(Path::new("a_file.txt").is_dir(), false);
§See Also
This is a convenience function that coerces errors to false. If you want to
check errors, call fs::metadata
and handle its Result
. Then call
fs::Metadata::is_dir
if it was Ok
.
1.58.0 · Sourcepub fn is_symlink(&self) -> bool
pub fn is_symlink(&self) -> bool
Returns true
if the path exists on disk and is pointing at a symbolic link.
This function will not traverse symbolic links. In case of a broken symbolic link this will also return true.
If you cannot access the directory containing the file, e.g., because of a permission error, this will return false.
§Examples
use std::path::Path;
use std::os::unix::fs::symlink;
let link_path = Path::new("link");
symlink("/origin_does_not_exist/", link_path).unwrap();
assert_eq!(link_path.is_symlink(), true);
assert_eq!(link_path.exists(), false);
§See Also
This is a convenience function that coerces errors to false. If you want to
check errors, call fs::symlink_metadata
and handle its Result
. Then call
fs::Metadata::is_symlink
if it was Ok
.
Trait Implementations§
Source§impl AsRef<ObjectPath> for ObjectPathBuf
impl AsRef<ObjectPath> for ObjectPathBuf
Source§fn as_ref(&self) -> &ObjectPath
fn as_ref(&self) -> &ObjectPath
Source§impl AsRef<Path> for ObjectPathBuf
impl AsRef<Path> for ObjectPathBuf
Source§impl AsRef<str> for ObjectPathBuf
impl AsRef<str> for ObjectPathBuf
Source§impl Borrow<ObjectPath> for ObjectPathBuf
impl Borrow<ObjectPath> for ObjectPathBuf
Source§fn borrow(&self) -> &ObjectPath
fn borrow(&self) -> &ObjectPath
Source§impl Clone for ObjectPathBuf
impl Clone for ObjectPathBuf
Source§fn clone(&self) -> ObjectPathBuf
fn clone(&self) -> ObjectPathBuf
1.0.0 · Source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moreSource§impl Debug for ObjectPathBuf
impl Debug for ObjectPathBuf
Source§impl Default for ObjectPathBuf
impl Default for ObjectPathBuf
Source§fn default() -> ObjectPathBuf
fn default() -> ObjectPathBuf
Source§impl Deref for ObjectPathBuf
impl Deref for ObjectPathBuf
Source§impl Display for ObjectPathBuf
impl Display for ObjectPathBuf
Source§impl From<&ObjectPath> for ObjectPathBuf
impl From<&ObjectPath> for ObjectPathBuf
Source§fn from(path: &ObjectPath) -> Self
fn from(path: &ObjectPath) -> Self
Source§impl From<ObjectPathBuf> for PathBuf
impl From<ObjectPathBuf> for PathBuf
Source§fn from(buf: ObjectPathBuf) -> Self
fn from(buf: ObjectPathBuf) -> Self
Source§impl From<ObjectPathBuf> for String
impl From<ObjectPathBuf> for String
Source§fn from(path: ObjectPathBuf) -> Self
fn from(path: ObjectPathBuf) -> Self
Source§impl FromStr for ObjectPathBuf
impl FromStr for ObjectPathBuf
Source§impl Hash for ObjectPathBuf
impl Hash for ObjectPathBuf
Source§impl Marshal for ObjectPathBuf
impl Marshal for ObjectPathBuf
fn marshal(&self, ctx: &mut MarshalContext<'_, '_>) -> Result<(), Error>
fn marshal_as_variant( &self, ctx: &mut MarshalContext<'_, '_>, ) -> Result<(), Error>
Source§impl Ord for ObjectPathBuf
impl Ord for ObjectPathBuf
Source§impl PartialEq<ObjectPath> for ObjectPathBuf
impl PartialEq<ObjectPath> for ObjectPathBuf
Source§impl PartialEq for ObjectPathBuf
impl PartialEq for ObjectPathBuf
Source§impl PartialOrd for ObjectPathBuf
impl PartialOrd for ObjectPathBuf
Source§impl Signature for ObjectPathBuf
impl Signature for ObjectPathBuf
fn signature() -> Type
fn alignment() -> usize
Source§fn sig_str(s_buf: &mut SignatureBuffer)
fn sig_str(s_buf: &mut SignatureBuffer)
SignatureBuffer
. Read more