Ruby file absolute path

For each of these entities, permissions may be set to read, write, or execute the file:. Higher-order bits may also be used to indicate the type of file plain, directory, pipe, socket, and so on and various other special features. If the permissions are for a directory, the meaning of the execute bit changes; when set the directory can be searched. On non-Posix operating systems, there may be only the ability to make a file read-only or read-write. In this case, the remaining permission bits will be synthesized to resemble typical values.

The only change that can be made is to make the file read-only, which is reported as Various constants for the methods in File can be found in File::Constants. Converts a pathname to an absolute pathname. Returns the last access time for the named file as a Time object.

If the platform doesn't have birthtime, raises NotImplementedError. Actual effects are operating system dependent see the beginning of this section. On Unix systems, see chmod 2 for details. Returns the number of files processed. Changes the owner and group of the named file s to the given numeric owner and group id's. Only a process with superuser privileges may change the owner of a file.

The current owner of a file may change the file's group to any group to which the owner belongs. A nil or -1 owner or group id is ignored. Returns the change time for the named file the time at which directory information about the file was changed, not the file itself. Deletes the named files, returning the number of names passed as arguments. Raises an exception on any error. Since the underlying implementation relies on the unlink 2 system call, the type of exception raised depends on its error type see linux.

Returns true if the named file is a directory, or a symlink that points at a directory, and false otherwise. Returns true if the named file is executable by the effective user and group id of this process. See eaccess 3. Returns true if the named file is executable by the real user and group id of this process. See access 3. A more complex example which also resolves parent directory is as follows.

Returns the extension the portion of file name in path starting from the last period. If path is a dotfile, or starts with a period, then the starting dot is not dealt with the start of the extension.

An empty string will also be returned when the period is the last character in path. If the file argument is a symbolic link, it will resolve the symbolic link and use the file referenced by the link. Returns true if path matches against pattern. The pattern is not a regular expression; instead it follows rules similar to shell filename globbing. It may contain the following metacharacters:.

See Find. Return true if the receiver matches the given pattern. Freezes this Pathname. See Object. Pathname "ruby This method uses the base keyword argument of Dir. Same as chmod , but does not follow symbolic links. Same as chown , but does not follow symbolic links. Creates a hard link at pathname.

Creates a symbolic link. Create the referenced directory. See Dir. See FileUtils. Returns true if self points to a mountpoint. Returns the last modified time of the file. Opens the file for reading or writing.

Opens the referenced directory. Returns the parent directory. Returns all data from the file, or the first N bytes if specified. Returns all the lines from the file. Read symbolic link. Returns the real absolute pathname of self in the actual filesystem. Does not contain symlinks or useless dots,..

The last component of the real pathname can be nonexistent. Returns the real absolute pathname for self in the actual filesystem. All components of the pathname must exist when this method is called.

The opposite of absolute? It returns false if the pathname begins with a slash. Learn Ruby on Rails from Scratch 46 Lectures 9. More Detail. Previous Page Print Page. Save Close. File::basename path[, suffix] Returns the filename at the end of path. File::chmod mode, path Changes the permission mode of the specified files. File::chown owner, group, path Changes the owner and group of the specified files. The reason the question is very unclear is that even in a script , File.

Add a comment. Active Oldest Votes. Note: this does not return the location of the current file. In order to do that, see the answers below. This only returns the current working directory of the shell which is calling the script just like pwd , which might be somewhere completely different than where the script file is located.

Dexygen That's fine for you. I had a different use case scenario and so I made a note for myself and anyone else who might face the same issue. As you can see from the upvotes on the answer below, there are almost others at least who also had the same issue. BeMathis 2 2 silver badges 10 10 bronze badges. Psylone Psylone 2, 1 1 gold badge 15 15 silver badges 15 15 bronze badges.

There is a problem, Dir.