[Bug 999207] Re: what is the operative readlink command?

[jpvrlaone]

Reuested info follows plus  error messages listed when ran as  root and user.
Maybe

# readlink --version
readlink (GNU coreutils) 8.13
Copyright (C) 2011 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

Written by Dmitry V. Levin.

MORE >>>
AS ROOT>
#  readlink -f "$0"readlink: invalid option -- 'u'
Try `readlink --help' for more information.

AS USER >
$ readlink -f "$0"readlink:  invalid option -- 'b'
Try `readlink --help' for more information.

BELOW IS 
# ./install 

DEFAULT_INSTALL_PATH="/opt/pcdir" 
+ DEFAULT_INSTALL_PATH=/opt/pcdir
DEFAULT_RUN_USER="root" 
+ DEFAULT_RUN_USER=root 
DEFAULT_RUN_GROUP="root" 
+ DEFAULT_RUN_GROUP=root 
RUN_LEVELS=(2 3 4 5) 
+ RUN_LEVELS=(2 3 4 5) 
INSTALL_AS_SERVICE="y" 
+ INSTALL_AS_SERVICE=y 
SCRIPT=`readlink -f "$0"` 
readlink -f "$0" 
++ readlink -f ./install 
+ SCRIPT=/opt/pcdir/install 
INSTALLDIR=`dirname "$SCRIPT"` 
dirname "$SCRIPT" 
++ dirname /opt/pcdir/install 
+ INSTALLDIR=/opt/pcdir

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https://bugs.launchpad.net/bugs/999207

Title:
  what is the operative readlink command?

Status in “coreutils” package in Ubuntu:
  Incomplete

Bug description:
  I stumlbed accross a problem where a script  kept failing when running the readlink command.
  It did not like the use of the -f flag which is supported in the man page.   I got past the problem using  /usr/lib/klibc/bin/readlink   found through a search of the system.  More details can be found in the forum using the tag "readlink". 
  What is going on with the readlink command?

  Ubuntu 12.04 (precise)
  2.6.38-8-generic
  Intel(R) Core(TM) i5 CPU         650  @ 3.20GHz

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