readlink - phpMan

File: coreutils.info,  Node: readlink invocation,  Next: rmdir invocation,  Prev: mknod invocation,  Up: Special file types
12.6 `readlink': Print value of a symlink or canonical file name
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`readlink' may work in one of two supported modes:
`Readlink mode'
     `readlink' outputs the value of the given symbolic link.  If
     `readlink' is invoked with an argument other than the name of a
     symbolic link, it produces no output and exits with a nonzero exit
     code.
`Canonicalize mode'
     `readlink' outputs the absolute name of the given file which
     contains no `.', `..' components nor any repeated separators (`/')
     or symbolic links.

     readlink [OPTION] FILE
   By default, `readlink' operates in readlink mode.
   The program accepts the following options.  Also see *note Common
options::.
`-f'
`--canonicalize'
     Activate canonicalize mode.  If any component of the file name
     except the last one is missing or unavailable, `readlink' produces
     no output and exits with a nonzero exit code.  A trailing slash is
     ignored.
`-e'
`--canonicalize-existing'
     Activate canonicalize mode.  If any component is missing or
     unavailable, `readlink' produces no output and exits with a
     nonzero exit code.  A trailing slash requires that the name
     resolve to a directory.
`-m'
`--canonicalize-missing'
     Activate canonicalize mode.  If any component is missing or
     unavailable, `readlink' treats it as a directory.
`-n'
`--no-newline'
     Do not output the trailing newline.
`-s'
`-q'
`--silent'
`--quiet'
     Suppress most error messages.
`-v'
`--verbose'
     Report error messages.

   The `readlink' utility first appeared in OpenBSD 2.1.
   There is a `realpath' command on some systems which operates like
`readlink' in canonicalize mode.
   An exit status of zero indicates success, and a nonzero value
indicates failure.