NAME¶
realpath - return the canonicalised absolute pathname
SYNOPSIS¶
realpath [
-s|
--strip] [
-z|
--zero]
filename ...
realpath --h|
--help
realpath --v|
--version
DESCRIPTION¶
realpath converts each
filename argument to an absolute pathname,
which has no components that are symbolic links or the special
. or
.. directory entries. (See
realpath(3) for more information.)
Each path component in the
filename must exist, otherwise
realpath
will fail and non-zero exit status will be returned.
Please note that mostly the same functionality is provided by the `-e' option of
the
readlink(1) command.
When the
-s option is used
realpath only removes the
. and
.. directories, but not symbolic links from
filename. If the
given
filename argument is relative (i.e. does not start with
`
/'),
realpath -s prepends to it the current directory name as
obtained from the
getcwd(2) system call before further processing.
Each converted pathname is output to the standard output, on its own line.
OPTIONS¶
- -s, --strip
- Only strip . and .., components, but do not
resolve symbolic links.
- -z, --zero
- Separate output filenames with the null character instead
of newline, so it can be used with the `-0' option of
xargs(1).
- -h, --help
- Print short usage information.
- -v, --version
- Show realpath's version number.
EXAMPLES¶
For the examples below let's suppose that
/usr/bin/X11 is a symbolic
link, pointing to directory
/usr/bin.
Example 1¶
Regardless of what the current directory is
realpath /../usr/bin/X11/./xterm
prints
but
realpath -s /../usr/bin/X11/./xterm
outputs
Example 2¶
When the current directory is
/usr/bin/X11 (which is still a symbolic
link to
/usr/bin), the output of both
and
will be
Example 3¶
Providing that the current directory is
/home/user (and the directory
exists before and during the realpath run), the command
realpath ../path/to/some/./non-existent/./directory/../or/../file
will fail with the following error
../path/to/some/./non-existent/./directory/../or/../file: No such file or directory
but
realpath -s ../path/to/some/./non-existent/./directory/../or/../file
will return
/home/path/to/some/non-existent/file
EXIT STATUS¶
realpath returns a zero exit code when
all pathnames were
successfully converted.
In case of any errors (e.g. missing or unavailable directories in the path),
realpath prints error message to stderr and returns a non-zero exit
code.
SEE ALSO¶
basename(1),
dirname(1),
readlink(1),
chase(1),
realpath(3)
BUGS¶
Hopefully none :)
If you find some, please report them via the normal Debian bug reporting system,
see the file
/usr/share/doc/debian/bug-reporting.txt in the package
doc-debian or the
reportbug(1) man page.
AUTHOR¶
Originally written by Lars Wirzenius <liw@iki.fi>, as a part of the dwww
package. Robert Luberda <robert@debian.org> currently maintains and
extends it.
realpath is licensed via the GNU General Public License. While it has been
written for Debian, porting it to other systems is strongly encouraged.
