realpath(1) [debian man page]

REALPATH(1)							      Debian							       REALPATH(1)

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
	   /usr/bin/xterm
       but
	   realpath -s /../usr/bin/X11/./xterm
       outputs
	   /usr/bin/X11/xterm

   Example 2
       When the current directory is /usr/bin/X11 (which is still a symbolic link to /usr/bin), the output of both
	   realpath ./xterm
       and
	   realpath  -s ./xterm
       will be
	   /usr/bin/xterm

   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.

Debian								October 16th, 2011						       REALPATH(1)

Check Out this Related Man Page

REALPATH(3)						   BSD Library Functions Manual 					       REALPATH(3)

NAME

     realpath -- returns the canonicalized absolute pathname

SYNOPSIS

     #include <stdlib.h>

     char *
     realpath(const char *restrict file_name, char *restrict resolved_name);

DESCRIPTION

     The realpath() function resolves all symbolic links, extra ``/'' characters, and references to /./ and /../ in file_name.	If the
     resolved_name argument is non-NULL, the resulting absolute pathname is copied there (it must refer to a buffer capable of storing at least
     PATH_MAX characters).

     As a permitted extension to the standard, if resolved_name is NULL, memory is allocated for the resulting absolute pathname, and is returned
     by realpath().  This memory should be freed by a call to free(3) when no longer needed.

     The realpath() function will resolve both absolute and relative paths and return the absolute pathname corresponding to file_name.  All com-
     ponents of file_name must exist when realpath() is called.

RETURN VALUES

     On success, the realpath() function returns the address of the resulting absolute pathname, which is resolved_name if it was non-NULL, or the
     address of newly allocated memory.  If an error occurs, realpath() returns NULL.  If resolved_name was non-NULL, it will contain the pathname
     which caused the problem.

VARIANTS

     Defining _DARWIN_C_SOURCE or _DARWIN_BETTER_REALPATH before including stdio.h will cause the provided implementation of realpath() to use
     F_GETPATH from fcntl(2) to discover the path.

ERRORS

     The function realpath() may fail and set the external variable errno for any of the errors specified for the library functions alloca(3),
     getattrlist(2), getcwd(3), lstat(2), readlink(2), stat(2), and strdup(3).

LEGACY SYNOPSIS

     #include <sys/param.h>
     #include <stdlib.h>

     The include file <sys/param.h> is necessary.

LEGACY DESCRIPTION

     In legacy mode, the last component of file_name does not need to exist when realpath() is called.

SEE ALSO

     free(3), getcwd(3), compat(5)

HISTORY

     The realpath() function first appeared in 4.4BSD.

BSD
								   April 5, 2008							       BSD

Linux and UNIX Man Pages

realpath(1) [debian man page]

Check Out this Related Man Page