In Files

  • pathname/lib/pathname.rb
  • pathname/pathname.c

Class/Module Index [+]

Quicksearch

Pathname

Pathname represents the name of a file or directory on the filesystem, but not the file itself.

The pathname depends on the Operating System: Unix, Windows, etc. This library works with pathnames of local OS, however non-Unix pathnames are supported experimentally.

A Pathname can be relative or absolute. It’s not until you try to reference the file that it even matters whether the file exists or not.

Pathname is immutable. It has no method for destructive update.

The goal of this class is to manipulate file path information in a neater way than standard Ruby provides. The examples below demonstrate the difference.

All functionality from File, FileTest, and some from Dir and FileUtils is included, in an unsurprising way. It is essentially a facade for all of these, and more.

Examples

Example 1: Using Pathname

require 'pathname'
pn = Pathname.new("/usr/bin/ruby")
size = pn.size              # 27662
isdir = pn.directory?       # false
dir  = pn.dirname           # Pathname:/usr/bin
base = pn.basename          # Pathname:ruby
dir, base = pn.split        # [Pathname:/usr/bin, Pathname:ruby]
data = pn.read
pn.open { |f| _ }
pn.each_line { |line| _ }

Example 2: Using standard Ruby

pn = "/usr/bin/ruby"
size = File.size(pn)        # 27662
isdir = File.directory?(pn) # false
dir  = File.dirname(pn)     # "/usr/bin"
base = File.basename(pn)    # "ruby"
dir, base = File.split(pn)  # ["/usr/bin", "ruby"]
data = File.read(pn)
File.open(pn) { |f| _ }
File.foreach(pn) { |line| _ }

Example 3: Special features

p1 = Pathname.new("/usr/lib")   # Pathname:/usr/lib
p2 = p1 + "ruby/1.8"            # Pathname:/usr/lib/ruby/1.8
p3 = p1.parent                  # Pathname:/usr
p4 = p2.relative_path_from(p3)  # Pathname:lib/ruby/1.8
pwd = Pathname.pwd              # Pathname:/home/gavin
pwd.absolute?                   # true
p5 = Pathname.new "."           # Pathname:.
p5 = p5 + "music/../articles"   # Pathname:music/../articles
p5.cleanpath                    # Pathname:articles
p5.realpath                     # Pathname:/home/gavin/articles
p5.children                     # [Pathname:/home/gavin/articles/linux, ...]

Breakdown of functionality

Core methods

These methods are effectively manipulating a String, because that’s all a path is. None of these access the file system except for mountpoint?, children, each_child, realdirpath and realpath.

File status predicate methods

These methods are a facade for FileTest:

File property and manipulation methods

These methods are a facade for File:

Directory methods

These methods are a facade for Dir:

IO

These methods are a facade for IO:

Utilities

These methods are a mixture of Find, FileUtils, and others:

Method documentation

As the above section shows, most of the methods in Pathname are facades. The documentation for these methods generally just says, for instance, “See FileTest.writable?”, as you should be familiar with the original method anyway, and its documentation (e.g. through ri) will contain more information. In some cases, a brief description will follow.

Public Class Methods

getwd() click to toggle source

Returns the current working directory as a Pathname.

Pathname.getwd
    #=> #<Pathname:/home/zzak/projects/ruby>

See Dir.getwd.

 
               static VALUE
path_s_getwd(VALUE klass)
{
    VALUE str;
    str = rb_funcall(rb_cDir, rb_intern("getwd"), 0);
    return rb_class_new_instance(1, &str, klass);
}
            
glob(p1, p2 = v2) click to toggle source

Returns or yields Pathname objects.

Pathname.glob("config/" "*.rb")
    #=> [#<Pathname:config/environment.rb>, #<Pathname:config/routes.rb>, ..]

See Dir.glob.

 
               static VALUE
path_s_glob(int argc, VALUE *argv, VALUE klass)
{
    VALUE args[2];
    int n;

    n = rb_scan_args(argc, argv, "11", &args[0], &args[1]);
    if (rb_block_given_p()) {
        return rb_block_call(rb_cDir, rb_intern("glob"), n, args, glob_i, klass);
    }
    else {
        VALUE ary;
        long i;
        ary = rb_funcall2(rb_cDir, rb_intern("glob"), n, args);
        ary = rb_convert_type(ary, T_ARRAY, "Array", "to_ary");
        for (i = 0; i < RARRAY_LEN(ary); i++) {
            VALUE elt = RARRAY_AREF(ary, i);
            elt = rb_class_new_instance(1, &elt, klass);
            rb_ary_store(ary, i, elt);
        }
        return ary;
    }
}
            
new(p1) click to toggle source

Create a Pathname object from the given String (or String-like object). If path contains a NULL character (\0), an ArgumentError is raised.

 
               static VALUE
path_initialize(VALUE self, VALUE arg)
{
    VALUE str;
    if (RB_TYPE_P(arg, T_STRING)) {
        str = arg;
    }
    else {
        str = rb_check_funcall(arg, id_to_path, 0, NULL);
        if (str == Qundef)
            str = arg;
        StringValue(str);
    }
    if (memchr(RSTRING_PTR(str), '\0', RSTRING_LEN(str)))
        rb_raise(rb_eArgError, "pathname contains null byte");
    str = rb_obj_dup(str);

    set_strpath(self, str);
    OBJ_INFECT(self, str);
    return self;
}
            
pwd() click to toggle source

Returns the current working directory as a Pathname.

Pathname.getwd
    #=> #<Pathname:/home/zzak/projects/ruby>

See Dir.getwd.

 
               static VALUE
path_s_getwd(VALUE klass)
{
    VALUE str;
    str = rb_funcall(rb_cDir, rb_intern("getwd"), 0);
    return rb_class_new_instance(1, &str, klass);
}
            

Public Instance Methods

+(other) click to toggle source

Appends a pathname fragment to self to produce a new Pathname object.

p1 = Pathname.new("/usr")      # Pathname:/usr
p2 = p1 + "bin/ruby"           # Pathname:/usr/bin/ruby
p3 = p1 + "/etc/passwd"        # Pathname:/etc/passwd

This method doesn’t access the file system; it is pure string manipulation.

 
               # File pathname/lib/pathname.rb, line 329
def +(other)
  other = Pathname.new(other) unless Pathname === other
  Pathname.new(plus(@path, other.to_s))
end
            
<=>(p1) click to toggle source

Provides a case-sensitive comparison operator for pathnames.

Pathname.new('/usr') <=> Pathname.new('/usr/bin')
    #=> -1
Pathname.new('/usr/bin') <=> Pathname.new('/usr/bin')
    #=> 0
Pathname.new('/usr/bin') <=> Pathname.new('/USR/BIN')
    #=> 1

It will return -1, 0 or 1 depending on the value of the left argument relative to the right argument. Or it will return nil if the arguments are not comparable.

 
               static VALUE
path_cmp(VALUE self, VALUE other)
{
    VALUE s1, s2;
    char *p1, *p2;
    char *e1, *e2;
    if (!rb_obj_is_kind_of(other, rb_cPathname))
        return Qnil;
    s1 = get_strpath(self);
    s2 = get_strpath(other);
    p1 = RSTRING_PTR(s1);
    p2 = RSTRING_PTR(s2);
    e1 = p1 + RSTRING_LEN(s1);
    e2 = p2 + RSTRING_LEN(s2);
    while (p1 < e1 && p2 < e2) {
        int c1, c2;
        c1 = (unsigned char)*p1++;
        c2 = (unsigned char)*p2++;
        if (c1 == '/') c1 = '\0';
        if (c2 == '/') c2 = '\0';
        if (c1 != c2) {
            if (c1 < c2)
                return INT2FIX(-1);
            else
                return INT2FIX(1);
        }
    }
    if (p1 < e1)
        return INT2FIX(1);
    if (p2 < e2)
        return INT2FIX(-1);
    return INT2FIX(0);
}
            
==(p1) click to toggle source

Compare this pathname with other. The comparison is string-based. Be aware that two different paths (foo.txt and ./foo.txt) can refer to the same file.

 
               static VALUE
path_eq(VALUE self, VALUE other)
{
    if (!rb_obj_is_kind_of(other, rb_cPathname))
        return Qfalse;
    return rb_str_equal(get_strpath(self), get_strpath(other));
}
            
===(p1) click to toggle source

Compare this pathname with other. The comparison is string-based. Be aware that two different paths (foo.txt and ./foo.txt) can refer to the same file.

 
               static VALUE
path_eq(VALUE self, VALUE other)
{
    if (!rb_obj_is_kind_of(other, rb_cPathname))
        return Qfalse;
    return rb_str_equal(get_strpath(self), get_strpath(other));
}
            
absolute?() click to toggle source

Predicate method for testing whether a path is absolute.

It returns true if the pathname begins with a slash.

p = Pathname.new('/im/sure')
p.absolute?
    #=> true

p = Pathname.new('not/so/sure')
p.absolute?
    #=> false
 
               # File pathname/lib/pathname.rb, line 224
def absolute?
  !relative?
end
            
ascend() click to toggle source

Iterates over and yields a new Pathname object for each element in the given path in ascending order.

Pathname.new('/path/to/some/file.rb').ascend {|v| p v}
   #<Pathname:/path/to/some/file.rb>
   #<Pathname:/path/to/some>
   #<Pathname:/path/to>
   #<Pathname:/path>
   #<Pathname:/>

Pathname.new('path/to/some/file.rb').ascend {|v| p v}
   #<Pathname:path/to/some/file.rb>
   #<Pathname:path/to/some>
   #<Pathname:path/to>
   #<Pathname:path>

It doesn’t access the filesystem.

 
               # File pathname/lib/pathname.rb, line 310
def ascend
  path = @path
  yield self
  while r = chop_basename(path)
    path, = r
    break if path.empty?
    yield self.class.new(del_trailing_separator(path))
  end
end
            
atime → time click to toggle source

Returns the last access time for the file.

See File.atime.

 
               static VALUE
path_atime(VALUE self)
{
    return rb_funcall(rb_cFile, rb_intern("atime"), 1, get_strpath(self));
}
            
basename(p1 = v1) click to toggle source

Returns the last component of the path.

See File.basename.

 
               static VALUE
path_basename(int argc, VALUE *argv, VALUE self)
{
    VALUE str = get_strpath(self);
    VALUE fext;
    if (rb_scan_args(argc, argv, "01", &fext) == 0)
        str = rb_funcall(rb_cFile, rb_intern("basename"), 1, str);
    else
        str = rb_funcall(rb_cFile, rb_intern("basename"), 2, str, fext);
    return rb_class_new_instance(1, &str, rb_obj_class(self));
}
            
binread([length [, offset]]) → string click to toggle source

Returns all the bytes from the file, or the first N if specified.

See IO.binread.

 
               static VALUE
path_binread(int argc, VALUE *argv, VALUE self)
{
    VALUE args[3];
    int n;

    args[0] = get_strpath(self);
    n = rb_scan_args(argc, argv, "02", &args[1], &args[2]);
    return rb_funcall2(rb_cIO, rb_intern("binread"), 1+n, args);
}
            
binwrite(string, [offset] ) => fixnum click to toggle source
binwrite(string, [offset], open_args ) => fixnum

Writes contents to the file, opening it in binary mode.

See IO.binwrite.

 
               static VALUE
path_binwrite(int argc, VALUE *argv, VALUE self)
{
    VALUE args[4];
    int n;

    args[0] = get_strpath(self);
    n = rb_scan_args(argc, argv, "03", &args[1], &args[2], &args[3]);
    return rb_funcall2(rb_cIO, rb_intern("binwrite"), 1+n, args);
}
            
blockdev?() click to toggle source

See FileTest.blockdev?.

 
               static VALUE
path_blockdev_p(VALUE self)
{
    return rb_funcall(rb_mFileTest, rb_intern("blockdev?"), 1, get_strpath(self));
}
            
chardev?() click to toggle source

See FileTest.chardev?.

 
               static VALUE
path_chardev_p(VALUE self)
{
    return rb_funcall(rb_mFileTest, rb_intern("chardev?"), 1, get_strpath(self));
}
            
children(with_directory=true) click to toggle source

Returns the children of the directory (files and subdirectories, not recursive) as an array of Pathname objects.

By default, the returned pathnames will have enough information to access the files. If you set with_directory to false, then the returned pathnames will contain the filename only.

For example:

pn = Pathname("/usr/lib/ruby/1.8")
pn.children
    # -> [ Pathname:/usr/lib/ruby/1.8/English.rb,
           Pathname:/usr/lib/ruby/1.8/Env.rb,
           Pathname:/usr/lib/ruby/1.8/abbrev.rb, ... ]
pn.children(false)
    # -> [ Pathname:English.rb, Pathname:Env.rb, Pathname:abbrev.rb, ... ]

Note that the results never contain the entries . and .. in the directory because they are not children.

 
               # File pathname/lib/pathname.rb, line 419
def children(with_directory=true)
  with_directory = false if @path == '.'
  result = []
  Dir.foreach(@path) {|e|
    next if e == '.' || e == '..'
    if with_directory
      result << self.class.new(File.join(@path, e))
    else
      result << self.class.new(e)
    end
  }
  result
end
            
chmod → integer click to toggle source

Changes file permissions.

See File.chmod.

 
               static VALUE
path_chmod(VALUE self, VALUE mode)
{
    return rb_funcall(rb_cFile, rb_intern("chmod"), 2, mode, get_strpath(self));
}
            
chown → integer click to toggle source

Change owner and group of the file.

See File.chown.

 
               static VALUE
path_chown(VALUE self, VALUE owner, VALUE group)
{
    return rb_funcall(rb_cFile, rb_intern("chown"), 3, owner, group, get_strpath(self));
}
            
cleanpath(consider_symlink=false) click to toggle source

Returns clean pathname of self with consecutive slashes and useless dots removed. The filesystem is not accessed.

If consider_symlink is true, then a more conservative algorithm is used to avoid breaking symbolic linkages. This may retain more .. entries than absolutely necessary, but without accessing the filesystem, this can’t be avoided.

See #realpath.

 
               # File pathname/lib/pathname.rb, line 86
def cleanpath(consider_symlink=false)
  if consider_symlink
    cleanpath_conservative
  else
    cleanpath_aggressive
  end
end
            
ctime → time click to toggle source

Returns the last change time, using directory information, not the file itself.

See File.ctime.

 
               static VALUE
path_ctime(VALUE self)
{
    return rb_funcall(rb_cFile, rb_intern("ctime"), 1, get_strpath(self));
}
            
delete() click to toggle source

Removes a file or directory, using File.unlink if self is a file, or Dir.unlink as necessary.

 
               static VALUE
path_unlink(VALUE self)
{
    VALUE eENOTDIR = rb_const_get_at(rb_mErrno, rb_intern("ENOTDIR"));
    VALUE str = get_strpath(self);
    return rb_rescue2(unlink_body, str, unlink_rescue, str, eENOTDIR, (VALUE)0);
}
            
descend() click to toggle source

Iterates over and yields a new Pathname object for each element in the given path in descending order.

Pathname.new('/path/to/some/file.rb').descend {|v| p v}
   #<Pathname:/>
   #<Pathname:/path>
   #<Pathname:/path/to>
   #<Pathname:/path/to/some>
   #<Pathname:/path/to/some/file.rb>

Pathname.new('path/to/some/file.rb').descend {|v| p v}
   #<Pathname:path>
   #<Pathname:path/to>
   #<Pathname:path/to/some>
   #<Pathname:path/to/some/file.rb>

It doesn’t access the filesystem.

 
               # File pathname/lib/pathname.rb, line 285
def descend
  vs = []
  ascend {|v| vs << v }
  vs.reverse_each {|v| yield v }
  nil
end
            
directory?() click to toggle source

See FileTest.directory?.

 
               static VALUE
path_directory_p(VALUE self)
{
    return rb_funcall(rb_mFileTest, rb_intern("directory?"), 1, get_strpath(self));
}
            
dirname() click to toggle source

Returns all but the last component of the path.

See File.dirname.

 
               static VALUE
path_dirname(VALUE self)
{
    VALUE str = get_strpath(self);
    str = rb_funcall(rb_cFile, rb_intern("dirname"), 1, str);
    return rb_class_new_instance(1, &str, rb_obj_class(self));
}
            
each_child(with_directory=true, &b) click to toggle source

Iterates over the children of the directory (files and subdirectories, not recursive).

It yields Pathname object for each child.

By default, the yielded pathnames will have enough information to access the files.

If you set with_directory to false, then the returned pathnames will contain the filename only.

Pathname("/usr/local").each_child {|f| p f }
#=> #<Pathname:/usr/local/share>
#   #<Pathname:/usr/local/bin>
#   #<Pathname:/usr/local/games>
#   #<Pathname:/usr/local/lib>
#   #<Pathname:/usr/local/include>
#   #<Pathname:/usr/local/sbin>
#   #<Pathname:/usr/local/src>
#   #<Pathname:/usr/local/man>

Pathname("/usr/local").each_child(false) {|f| p f }
#=> #<Pathname:share>
#   #<Pathname:bin>
#   #<Pathname:games>
#   #<Pathname:lib>
#   #<Pathname:include>
#   #<Pathname:sbin>
#   #<Pathname:src>
#   #<Pathname:man>

Note that the results never contain the entries . and .. in the directory because they are not children.

See #children

 
               # File pathname/lib/pathname.rb, line 469
def each_child(with_directory=true, &b)
  children(with_directory).each(&b)
end
            
each_entry() click to toggle source

Iterates over the entries (files and subdirectories) in the directory, yielding a Pathname object for each entry.

 
               static VALUE
path_each_entry(VALUE self)
{
    VALUE args[1];

    args[0] = get_strpath(self);
    return rb_block_call(rb_cDir, rb_intern("foreach"), 1, args, each_entry_i, rb_obj_class(self));
}
            
each_filename() click to toggle source

Iterates over each component of the path.

Pathname.new("/usr/bin/ruby").each_filename {|filename| ... }
  # yields "usr", "bin", and "ruby".

Returns an Enumerator if no block was given.

enum = Pathname.new("/usr/bin/ruby").each_filename
  # ... do stuff ...
enum.each { |e| ... }
  # yields "usr", "bin", and "ruby".
 
               # File pathname/lib/pathname.rb, line 260
def each_filename # :yield: filename
  return to_enum(__method__) unless block_given?
  _, names = split_names(@path)
  names.each {|filename| yield filename }
  nil
end
            
each_line {|line| ... } click to toggle source
each_line(sep=$/ [, open_args]) {|line| block } → nil
each_line(limit [, open_args]) {|line| block } → nil
each_line(sep, limit [, open_args]) {|line| block } → nil
each_line(...) → an_enumerator

Iterates over each line in the file and yields a String object for each.

 
               static VALUE
path_each_line(int argc, VALUE *argv, VALUE self)
{
    VALUE args[4];
    int n;

    args[0] = get_strpath(self);
    n = rb_scan_args(argc, argv, "03", &args[1], &args[2], &args[3]);
    if (rb_block_given_p()) {
        return rb_block_call(rb_cIO, rb_intern("foreach"), 1+n, args, 0, 0);
    }
    else {
        return rb_funcall2(rb_cIO, rb_intern("foreach"), 1+n, args);
    }
}
            
entries() click to toggle source

Return the entries (files and subdirectories) in the directory, each as a Pathname object.

The results contains just the names in the directory, without any trailing slashes or recursive look-up.

pp Pathname.new('/usr/local').entries
#=> [#<Pathname:share>,
#    #<Pathname:lib>,
#    #<Pathname:..>,
#    #<Pathname:include>,
#    #<Pathname:etc>,
#    #<Pathname:bin>,
#    #<Pathname:man>,
#    #<Pathname:games>,
#    #<Pathname:.>,
#    #<Pathname:sbin>,
#    #<Pathname:src>]

The result may contain the current directory #<Pathname:.> and the parent directory #<Pathname:..>.

If you don’t want . and .. and want directories, consider #children.

 
               static VALUE
path_entries(VALUE self)
{
    VALUE klass, str, ary;
    long i;
    klass = rb_obj_class(self);
    str = get_strpath(self);
    ary = rb_funcall(rb_cDir, rb_intern("entries"), 1, str);
    ary = rb_convert_type(ary, T_ARRAY, "Array", "to_ary");
    for (i = 0; i < RARRAY_LEN(ary); i++) {
        VALUE elt = RARRAY_AREF(ary, i);
        elt = rb_class_new_instance(1, &elt, klass);
        rb_ary_store(ary, i, elt);
    }
    return ary;
}
            
eql?(p1) click to toggle source

Compare this pathname with other. The comparison is string-based. Be aware that two different paths (foo.txt and ./foo.txt) can refer to the same file.

 
               static VALUE
path_eq(VALUE self, VALUE other)
{
    if (!rb_obj_is_kind_of(other, rb_cPathname))
        return Qfalse;
    return rb_str_equal(get_strpath(self), get_strpath(other));
}
            
executable?() click to toggle source

See FileTest.executable?.

 
               static VALUE
path_executable_p(VALUE self)
{
    return rb_funcall(rb_mFileTest, rb_intern("executable?"), 1, get_strpath(self));
}
            
executable_real?() click to toggle source

See FileTest.executable_real?.

 
               static VALUE
path_executable_real_p(VALUE self)
{
    return rb_funcall(rb_mFileTest, rb_intern("executable_real?"), 1, get_strpath(self));
}
            
exist?() click to toggle source

See FileTest.exist?.

 
               static VALUE
path_exist_p(VALUE self)
{
    return rb_funcall(rb_mFileTest, rb_intern("exist?"), 1, get_strpath(self));
}
            
expand_path(p1 = v1) click to toggle source

Returns the absolute path for the file.

See File.expand_path.

 
               static VALUE
path_expand_path(int argc, VALUE *argv, VALUE self)
{
    VALUE str = get_strpath(self);
    VALUE dname;
    if (rb_scan_args(argc, argv, "01", &dname) == 0)
        str = rb_funcall(rb_cFile, rb_intern("expand_path"), 1, str);
    else
        str = rb_funcall(rb_cFile, rb_intern("expand_path"), 2, str, dname);
    return rb_class_new_instance(1, &str, rb_obj_class(self));
}
            
extname() click to toggle source

Returns the file’s extension.

See File.extname.

 
               static VALUE
path_extname(VALUE self)
{
    VALUE str = get_strpath(self);
    return rb_funcall(rb_cFile, rb_intern("extname"), 1, str);
}
            
file?() click to toggle source

See FileTest.file?.

 
               static VALUE
path_file_p(VALUE self)
{
    return rb_funcall(rb_mFileTest, rb_intern("file?"), 1, get_strpath(self));
}
            
find() click to toggle source

Iterates over the directory tree in a depth first manner, yielding a Pathname for each file under “this” directory.

Returns an Enumerator if no block is given.

Since it is implemented by the standard library module Find, Find.prune can be used to control the traversal.

If self is ., yielded pathnames begin with a filename in the current directory, not ./.

See Find.find

 
               # File pathname/lib/pathname.rb, line 537
def find # :yield: pathname
  return to_enum(__method__) unless block_given?
  require 'find'
  if @path == '.'
    Find.find(@path) {|f| yield self.class.new(f.sub(%r{\A\./}, '')) }
  else
    Find.find(@path) {|f| yield self.class.new(f) }
  end
end
            
fnmatch(pattern, [flags]) → string click to toggle source
fnmatch?(pattern, [flags]) → string

Return true if the receiver matches the given pattern.

See File.fnmatch.

 
               static VALUE
path_fnmatch(int argc, VALUE *argv, VALUE self)
{
    VALUE str = get_strpath(self);
    VALUE pattern, flags;
    if (rb_scan_args(argc, argv, "11", &pattern, &flags) == 1)
        return rb_funcall(rb_cFile, rb_intern("fnmatch"), 2, pattern, str);
    else
        return rb_funcall(rb_cFile, rb_intern("fnmatch"), 3, pattern, str, flags);
}
            
fnmatch?(pattern, [flags]) → string click to toggle source

Return true if the receiver matches the given pattern.

See File.fnmatch.

 
               static VALUE
path_fnmatch(int argc, VALUE *argv, VALUE self)
{
    VALUE str = get_strpath(self);
    VALUE pattern, flags;
    if (rb_scan_args(argc, argv, "11", &pattern, &flags) == 1)
        return rb_funcall(rb_cFile, rb_intern("fnmatch"), 2, pattern, str);
    else
        return rb_funcall(rb_cFile, rb_intern("fnmatch"), 3, pattern, str, flags);
}
            
freeze → obj click to toggle source

Freezes this Pathname.

See Object.freeze.

 
               static VALUE
path_freeze(VALUE self)
{
    rb_call_super(0, 0);
    rb_str_freeze(get_strpath(self));
    return self;
}
            
ftype → string click to toggle source

Returns “type” of file (“file”, “directory”, etc).

See File.ftype.

 
               static VALUE
path_ftype(VALUE self)
{
    return rb_funcall(rb_cFile, rb_intern("ftype"), 1, get_strpath(self));
}
            
grpowned?() click to toggle source

See FileTest.grpowned?.

 
               static VALUE
path_grpowned_p(VALUE self)
{
    return rb_funcall(rb_mFileTest, rb_intern("grpowned?"), 1, get_strpath(self));
}
            
join(*args) click to toggle source

Joins the given pathnames onto self to create a new Pathname object.

path0 = Pathname.new("/usr")                # Pathname:/usr
path0 = path0.join("bin/ruby")              # Pathname:/usr/bin/ruby
    # is the same as
path1 = Pathname.new("/usr") + "bin/ruby"   # Pathname:/usr/bin/ruby
path0 == path1
    #=> true
 
               # File pathname/lib/pathname.rb, line 386
def join(*args)
  args.unshift self
  result = args.pop
  result = Pathname.new(result) unless Pathname === result
  return result if result.absolute?
  args.reverse_each {|arg|
    arg = Pathname.new(arg) unless Pathname === arg
    result = arg + result
    return result if result.absolute?
  }
  result
end
            
lchmod → integer click to toggle source

Same as #chmod, but does not follow symbolic links.

See File.lchmod.

 
               static VALUE
path_lchmod(VALUE self, VALUE mode)
{
    return rb_funcall(rb_cFile, rb_intern("lchmod"), 2, mode, get_strpath(self));
}
            
lchown → integer click to toggle source

Same as #chown, but does not follow symbolic links.

See File.lchown.

 
               static VALUE
path_lchown(VALUE self, VALUE owner, VALUE group)
{
    return rb_funcall(rb_cFile, rb_intern("lchown"), 3, owner, group, get_strpath(self));
}
            
lstat() click to toggle source

See File.lstat.

 
               static VALUE
path_lstat(VALUE self)
{
    return rb_funcall(rb_cFile, rb_intern("lstat"), 1, get_strpath(self));
}
            
mkdir(p1 = v1) click to toggle source

Create the referenced directory.

See Dir.mkdir.

 
               static VALUE
path_mkdir(int argc, VALUE *argv, VALUE self)
{
    VALUE str = get_strpath(self);
    VALUE vmode;
    if (rb_scan_args(argc, argv, "01", &vmode) == 0)
        return rb_funcall(rb_cDir, rb_intern("mkdir"), 1, str);
    else
        return rb_funcall(rb_cDir, rb_intern("mkdir"), 2, str, vmode);
}
            
mkpath() click to toggle source

Creates a full path, including any intermediate directories that don’t yet exist.

See FileUtils.mkpath and FileUtils.mkdir_p

 
               # File pathname/lib/pathname.rb, line 554
def mkpath
  require 'fileutils'
  FileUtils.mkpath(@path)
  nil
end
            
mountpoint?() click to toggle source

Returns true if self points to a mountpoint.

 
               # File pathname/lib/pathname.rb, line 191
def mountpoint?
  begin
    stat1 = self.lstat
    stat2 = self.parent.lstat
    stat1.dev == stat2.dev && stat1.ino == stat2.ino ||
      stat1.dev != stat2.dev
  rescue Errno::ENOENT
    false
  end
end
            
mtime → time click to toggle source

Returns the last modified time of the file.

See File.mtime.

 
               static VALUE
path_mtime(VALUE self)
{
    return rb_funcall(rb_cFile, rb_intern("mtime"), 1, get_strpath(self));
}
            
open(p1 = v1, p2 = v2, p3 = v3) click to toggle source

Opens the file for reading or writing.

See File.open.

 
               static VALUE
path_open(int argc, VALUE *argv, VALUE self)
{
    VALUE args[4];
    int n;

    args[0] = get_strpath(self);
    n = rb_scan_args(argc, argv, "03", &args[1], &args[2], &args[3]);
    if (rb_block_given_p()) {
        return rb_block_call(rb_cFile, rb_intern("open"), 1+n, args, 0, 0);
    }
    else {
        return rb_funcall2(rb_cFile, rb_intern("open"), 1+n, args);
    }
}
            
opendir() click to toggle source

Opens the referenced directory.

See Dir.open.

 
               static VALUE
path_opendir(VALUE self)
{
    VALUE args[1];

    args[0] = get_strpath(self);
    return rb_block_call(rb_cDir, rb_intern("open"), 1, args, 0, 0);
}
            
owned?() click to toggle source

See FileTest.owned?.

 
               static VALUE
path_owned_p(VALUE self)
{
    return rb_funcall(rb_mFileTest, rb_intern("owned?"), 1, get_strpath(self));
}
            
parent() click to toggle source

Returns the parent directory.

This is same as self + '..'.

 
               # File pathname/lib/pathname.rb, line 186
def parent
  self + '..'
end
            
pipe?() click to toggle source

See FileTest.pipe?.

 
               static VALUE
path_pipe_p(VALUE self)
{
    return rb_funcall(rb_mFileTest, rb_intern("pipe?"), 1, get_strpath(self));
}
            
read([length [, offset]]) → string click to toggle source
read([length [, offset]], open_args) → string

Returns all data from the file, or the first N bytes if specified.

See IO.read.

 
               static VALUE
path_read(int argc, VALUE *argv, VALUE self)
{
    VALUE args[4];
    int n;

    args[0] = get_strpath(self);
    n = rb_scan_args(argc, argv, "03", &args[1], &args[2], &args[3]);
    return rb_funcall2(rb_cIO, rb_intern("read"), 1+n, args);
}
            
readable?() click to toggle source

See FileTest.readable?.

 
               static VALUE
path_readable_p(VALUE self)
{
    return rb_funcall(rb_mFileTest, rb_intern("readable?"), 1, get_strpath(self));
}
            
readable_real?() click to toggle source

See FileTest.readable_real?.

 
               static VALUE
path_readable_real_p(VALUE self)
{
    return rb_funcall(rb_mFileTest, rb_intern("readable_real?"), 1, get_strpath(self));
}
            
readlines(sep=$/ [, open_args]) → array click to toggle source
readlines(limit [, open_args]) → array
readlines(sep, limit [, open_args]) → array

Returns all the lines from the file.

See IO.readlines.

 
               static VALUE
path_readlines(int argc, VALUE *argv, VALUE self)
{
    VALUE args[4];
    int n;

    args[0] = get_strpath(self);
    n = rb_scan_args(argc, argv, "03", &args[1], &args[2], &args[3]);
    return rb_funcall2(rb_cIO, rb_intern("readlines"), 1+n, args);
}
            
realdirpath(p1 = v1) click to toggle source

Returns the real (absolute) pathname of self in the actual filesystem.

Does not contain symlinks or useless dots, .. and ..

The last component of the real pathname can be nonexistent.

 
               static VALUE
path_realdirpath(int argc, VALUE *argv, VALUE self)
{
    VALUE basedir, str;
    rb_scan_args(argc, argv, "01", &basedir);
    str = rb_funcall(rb_cFile, rb_intern("realdirpath"), 2, get_strpath(self), basedir);
    return rb_class_new_instance(1, &str, rb_obj_class(self));
}
            
realpath(p1 = v1) click to toggle source

Returns the real (absolute) pathname for self in the actual filesystem.

Does not contain symlinks or useless dots, .. and ..

All components of the pathname must exist when this method is called.

 
               static VALUE
path_realpath(int argc, VALUE *argv, VALUE self)
{
    VALUE basedir, str;
    rb_scan_args(argc, argv, "01", &basedir);
    str = rb_funcall(rb_cFile, rb_intern("realpath"), 2, get_strpath(self), basedir);
    return rb_class_new_instance(1, &str, rb_obj_class(self));
}
            
relative?() click to toggle source

The opposite of #absolute?

It returns false if the pathname begins with a slash.

p = Pathname.new('/im/sure')
p.relative?
    #=> false

p = Pathname.new('not/so/sure')
p.relative?
    #=> true
 
               # File pathname/lib/pathname.rb, line 239
def relative?
  path = @path
  while r = chop_basename(path)
    path, = r
  end
  path == ''
end
            
relative_path_from(base_directory) click to toggle source

Returns a relative path from the given base_directory to the receiver.

If self is absolute, then base_directory must be absolute too.

If self is relative, then base_directory must be relative too.

This method doesn’t access the filesystem. It assumes no symlinks.

ArgumentError is raised when it cannot find a relative path.

 
               # File pathname/lib/pathname.rb, line 484
def relative_path_from(base_directory)
  dest_directory = self.cleanpath.to_s
  base_directory = base_directory.cleanpath.to_s
  dest_prefix = dest_directory
  dest_names = []
  while r = chop_basename(dest_prefix)
    dest_prefix, basename = r
    dest_names.unshift basename if basename != '.'
  end
  base_prefix = base_directory
  base_names = []
  while r = chop_basename(base_prefix)
    base_prefix, basename = r
    base_names.unshift basename if basename != '.'
  end
  unless SAME_PATHS[dest_prefix, base_prefix]
    raise ArgumentError, "different prefix: #{dest_prefix.inspect} and #{base_directory.inspect}"
  end
  while !dest_names.empty? &&
        !base_names.empty? &&
        SAME_PATHS[dest_names.first, base_names.first]
    dest_names.shift
    base_names.shift
  end
  if base_names.include? '..'
    raise ArgumentError, "base_directory has ..: #{base_directory.inspect}"
  end
  base_names.fill('..')
  relpath_names = base_names + dest_names
  if relpath_names.empty?
    Pathname.new('.')
  else
    Pathname.new(File.join(*relpath_names))
  end
end
            
rename(p1) click to toggle source

Rename the file.

See File.rename.

 
               static VALUE
path_rename(VALUE self, VALUE to)
{
    return rb_funcall(rb_cFile, rb_intern("rename"), 2, get_strpath(self), to);
}
            
rmdir() click to toggle source

Remove the referenced directory.

See Dir.rmdir.

 
               static VALUE
path_rmdir(VALUE self)
{
    return rb_funcall(rb_cDir, rb_intern("rmdir"), 1, get_strpath(self));
}
            
rmtree() click to toggle source

Recursively deletes a directory, including all directories beneath it.

See FileUtils.rm_r

 
               # File pathname/lib/pathname.rb, line 563
def rmtree
  # The name "rmtree" is borrowed from File::Path of Perl.
  # File::Path provides "mkpath" and "rmtree".
  require 'fileutils'
  FileUtils.rm_r(@path)
  nil
end
            
root?() click to toggle source

Predicate method for root directories. Returns true if the pathname consists of consecutive slashes.

It doesn’t access the filesystem. So it may return false for some pathnames which points to roots such as /usr/...

 
               # File pathname/lib/pathname.rb, line 209
def root?
  !!(chop_basename(@path) == nil && /#{SEPARATOR_PAT}/o =~ @path)
end
            
setgid?() click to toggle source

See FileTest.setgid?.

 
               static VALUE
path_setgid_p(VALUE self)
{
    return rb_funcall(rb_mFileTest, rb_intern("setgid?"), 1, get_strpath(self));
}
            
setuid?() click to toggle source

See FileTest.setuid?.

 
               static VALUE
path_setuid_p(VALUE self)
{
    return rb_funcall(rb_mFileTest, rb_intern("setuid?"), 1, get_strpath(self));
}
            
size() click to toggle source

See FileTest.size.

 
               static VALUE
path_size(VALUE self)
{
    return rb_funcall(rb_mFileTest, rb_intern("size"), 1, get_strpath(self));
}
            
size?() click to toggle source

See FileTest.size?.

 
               static VALUE
path_size_p(VALUE self)
{
    return rb_funcall(rb_mFileTest, rb_intern("size?"), 1, get_strpath(self));
}
            
socket?() click to toggle source

See FileTest.socket?.

 
               static VALUE
path_socket_p(VALUE self)
{
    return rb_funcall(rb_mFileTest, rb_intern("socket?"), 1, get_strpath(self));
}
            
split() click to toggle source

Returns the dirname and the basename in an Array.

See File.split.

 
               static VALUE
path_split(VALUE self)
{
    VALUE str = get_strpath(self);
    VALUE ary, dirname, basename;
    ary = rb_funcall(rb_cFile, rb_intern("split"), 1, str);
    ary = rb_check_array_type(ary);
    dirname = rb_ary_entry(ary, 0);
    basename = rb_ary_entry(ary, 1);
    dirname = rb_class_new_instance(1, &dirname, rb_obj_class(self));
    basename = rb_class_new_instance(1, &basename, rb_obj_class(self));
    return rb_ary_new3(2, dirname, basename);
}
            
stat() click to toggle source

Returns a File::Stat object.

See File.stat.

 
               static VALUE
path_stat(VALUE self)
{
    return rb_funcall(rb_cFile, rb_intern("stat"), 1, get_strpath(self));
}
            
sticky?() click to toggle source

See FileTest.sticky?.

 
               static VALUE
path_sticky_p(VALUE self)
{
    return rb_funcall(rb_mFileTest, rb_intern("sticky?"), 1, get_strpath(self));
}
            
sub(*args) click to toggle source

Return a pathname which is substituted by String#sub.

path1 = Pathname.new('/usr/bin/perl')
path1.sub('perl', 'ruby')
    #=> #<Pathname:/usr/bin/ruby>
 
               static VALUE
path_sub(int argc, VALUE *argv, VALUE self)
{
    VALUE str = get_strpath(self);

    if (rb_block_given_p()) {
        str = rb_block_call(str, rb_intern("sub"), argc, argv, 0, 0);
    }
    else {
        str = rb_funcall2(str, rb_intern("sub"), argc, argv);
    }
    return rb_class_new_instance(1, &str, rb_obj_class(self));
}
            
sub_ext(p1) click to toggle source

Return a pathname with repl added as a suffix to the basename.

If self has no extension part, repl is appended.

Pathname.new('/usr/bin/shutdown').sub_ext('.rb')
    #=> #<Pathname:/usr/bin/shutdown.rb>
 
               static VALUE
path_sub_ext(VALUE self, VALUE repl)
{
    VALUE str = get_strpath(self);
    VALUE str2;
    long extlen;
    const char *ext;
    const char *p;

    StringValue(repl);
    p = RSTRING_PTR(str);
    extlen = RSTRING_LEN(str);
    ext = ruby_enc_find_extname(p, &extlen, rb_enc_get(str));
    if (ext == NULL) {
        ext = p + RSTRING_LEN(str);
    }
    else if (extlen <= 1) {
        ext += extlen;
    }
    str2 = rb_str_subseq(str, 0, ext-p);
    rb_str_append(str2, repl);
    OBJ_INFECT(str2, str);
    return rb_class_new_instance(1, &str2, rb_obj_class(self));
}
            
sysopen([mode, [perm]]) → fixnum click to toggle source

See IO.sysopen.

 
               static VALUE
path_sysopen(int argc, VALUE *argv, VALUE self)
{
    VALUE args[3];
    int n;

    args[0] = get_strpath(self);
    n = rb_scan_args(argc, argv, "02", &args[1], &args[2]);
    return rb_funcall2(rb_cIO, rb_intern("sysopen"), 1+n, args);
}
            
taint → obj click to toggle source

Taints this Pathname.

See Object.taint.

 
               static VALUE
path_taint(VALUE self)
{
    rb_call_super(0, 0);
    rb_obj_taint(get_strpath(self));
    return self;
}
            
to_path → string click to toggle source

Return the path as a String.

#to_path is implemented so Pathname objects are usable with File.open, etc.

 
               static VALUE
path_to_s(VALUE self)
{
    return rb_obj_dup(get_strpath(self));
}
            
to_s → string click to toggle source

Return the path as a String.

#to_path is implemented so Pathname objects are usable with File.open, etc.

 
               static VALUE
path_to_s(VALUE self)
{
    return rb_obj_dup(get_strpath(self));
}
            
truncate(p1) click to toggle source

Truncates the file to length bytes.

See File.truncate.

 
               static VALUE
path_truncate(VALUE self, VALUE length)
{
    return rb_funcall(rb_cFile, rb_intern("truncate"), 2, get_strpath(self), length);
}
            
untaint → obj click to toggle source

Untaints this Pathname.

See Object.untaint.

 
               static VALUE
path_untaint(VALUE self)
{
    rb_call_super(0, 0);
    rb_obj_untaint(get_strpath(self));
    return self;
}
            
utime(p1, p2) click to toggle source

Update the access and modification times of the file.

See File.utime.

 
               static VALUE
path_utime(VALUE self, VALUE atime, VALUE mtime)
{
    return rb_funcall(rb_cFile, rb_intern("utime"), 3, atime, mtime, get_strpath(self));
}
            
world_readable?() click to toggle source

See FileTest.world_readable?.

 
               static VALUE
path_world_readable_p(VALUE self)
{
    return rb_funcall(rb_mFileTest, rb_intern("world_readable?"), 1, get_strpath(self));
}
            
world_writable?() click to toggle source

See FileTest.world_writable?.

 
               static VALUE
path_world_writable_p(VALUE self)
{
    return rb_funcall(rb_mFileTest, rb_intern("world_writable?"), 1, get_strpath(self));
}
            
writable?() click to toggle source

See FileTest.writable?.

 
               static VALUE
path_writable_p(VALUE self)
{
    return rb_funcall(rb_mFileTest, rb_intern("writable?"), 1, get_strpath(self));
}
            
writable_real?() click to toggle source

See FileTest.writable_real?.

 
               static VALUE
path_writable_real_p(VALUE self)
{
    return rb_funcall(rb_mFileTest, rb_intern("writable_real?"), 1, get_strpath(self));
}
            
write(string, [offset] ) => fixnum click to toggle source
write(string, [offset], open_args ) => fixnum

Writes contents to the file.

See IO.write.

 
               static VALUE
path_write(int argc, VALUE *argv, VALUE self)
{
    VALUE args[4];
    int n;

    args[0] = get_strpath(self);
    n = rb_scan_args(argc, argv, "03", &args[1], &args[2], &args[3]);
    return rb_funcall2(rb_cIO, rb_intern("write"), 1+n, args);
}
            
zero?() click to toggle source

See FileTest.zero?.

 
               static VALUE
path_zero_p(VALUE self)
{
    return rb_funcall(rb_mFileTest, rb_intern("zero?"), 1, get_strpath(self));
}
            

Commenting is here to help enhance the documentation. For example, code samples, or clarification of the documentation.

If you have questions about Ruby or the documentation, please post to one of the Ruby mailing lists. You will get better, faster, help that way.

If you wish to post a correction of the docs, please do so, but also file bug report so that it can be corrected for the next release. Thank you.

If you want to help improve the Ruby documentation, please visit Documenting-ruby.org.

blog comments powered by Disqus