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realpath

# $EPIC: realpath.txt,v 1.1.1.1 2006/07/11 04:57:43 jnelson Exp $

Synopsis:

$realpath(<filepath>)

Technical:

  • If the <filepath> argument is omitted the empty string is returned.
  • If the operating system does not have the realpath(3) function call, the <filepath> argument is returned.
  • All directories, if any, in <filepath> must exist; if any of them do not exist the empty string is returned.
  • The return function is the full absolute path of <filepath> with all symbolic links, `.', `..' and extra '/'s references resolved.
  • This function calls the operating system's realpath(3) function.

Practical:

Useful if you want to find the absolute path of filename with '.' or '..' or symbolic links in it.

Returns:

The absolute path equivalent of <filepath>

Examples:

If /home is a symbolic link to /usr/home, and /usr/local is a link to /local, then

$realpath(/home/../local/src)  returns "/local/src"

 (/home -> /usr/home
  ..    -> /usr
  local -> /local
  src   -> /local/src)
realpath.txt · Last modified: 2006/07/11 04:57 (external edit)