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Full Discussion: Convert Relative path to Absolute path, without changing directory to the file location.
Top Forums UNIX for Beginners Questions & Answers Convert Relative path to Absolute path, without changing directory to the file location. Post 303041782 by RudiC on Wednesday 4th of December 2019 04:56:36 AM
Old 12-04-2019
I don't think either of a/src, b/src, or x/y/dataLu/src is an absolute path; they all start downwards from your current working directory, $PWD.


Just in case neither the readlink nor the realpath solution please you, and you don't want external commands but bash builtins do the job for you, how would something along this line fit in:
Code:
DIR="../../dataLU/src"
TMP="${PWD%/*}${DIR#..}"
TMP="${TMP/*..*}"
ls "${TMP:-${PWD%/*/*}${DIR#../..}}"

Unfortunately, shell's "parameter expansion" only works on one variable at a time, so the repeated assignments to temporary variables are inevitable. Still it will be faster than creating a process plus loading and running any extermal command.
Last edited by RudiC; 12-04-2019 at 06:04 AM..
This User Gave Thanks to RudiC For This Post:
Sekhar419
 

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LEARN ABOUT FREEBSD

pwd

PWD(1)							    BSD General Commands Manual 						    PWD(1)

NAME

     pwd -- return working directory name

SYNOPSIS

     pwd [-L | -P]

DESCRIPTION

     The pwd utility writes the absolute pathname of the current working directory to the standard output.

     Some shells may provide a builtin pwd command which is similar or identical to this utility.  Consult the builtin(1) manual page.

     The options are as follows:

     -L      Display the logical current working directory.

     -P      Display the physical current working directory (all symbolic links resolved).

     If no options are specified, the -P option is assumed.

ENVIRONMENT

     Environment variables used by pwd:

     PWD  Logical current working directory.

EXIT STATUS

     The pwd utility exits 0 on success, and >0 if an error occurs.

SEE ALSO

     builtin(1), cd(1), csh(1), sh(1), getcwd(3)

STANDARDS

     The pwd utility conforms to IEEE Std 1003.1-2001 (``POSIX.1'').

BUGS

     In csh(1) the command dirs is always faster because it is built into that shell.  However, it can give a different answer in the rare case
     that the current directory or a containing directory was moved after the shell descended into it.

     The -L option does not work unless the PWD environment variable is exported by the shell.

BSD
								  April 12, 2003							       BSD
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