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Top Forums Shell Programming and Scripting Getting canonical path with sed Post 302972755 by Corona688 on Tuesday 10th of May 2016 11:14:54 AM
Old 05-10-2016
Not listed in your list of "I knows": I think you could do this with shell builtins, and I don't mean the bash/ksh dependent ones.

Also, if it's supposed to work with any filename "including space, tabs, etc" then it fails at line one, where you don't put double quotes around $1.
 

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READLINK(1)							   User Commands						       READLINK(1)

NAME
readlink - print resolved symbolic links or canonical file names SYNOPSIS
readlink [OPTION]... FILE... DESCRIPTION
Note realpath(1) is the preferred command to use for canonicalization functionality. Print value of a symbolic link or canonical file name -f, --canonicalize canonicalize by following every symlink in every component of the given name recursively; all but the last component must exist -e, --canonicalize-existing canonicalize by following every symlink in every component of the given name recursively, all components must exist -m, --canonicalize-missing canonicalize by following every symlink in every component of the given name recursively, without requirements on components exis- tence -n, --no-newline do not output the trailing delimiter -q, --quiet, -s, --silent suppress most error messages (on by default) -v, --verbose report error messages -z, --zero end each output line with NUL, not newline --help display this help and exit --version output version information and exit AUTHOR
Written by Dmitry V. Levin. REPORTING BUGS
GNU coreutils online help: <http://www.gnu.org/software/coreutils/> Report readlink translation bugs to <http://translationproject.org/team/> COPYRIGHT
Copyright (C) 2017 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. SEE ALSO
readlink(2), realpath(1), realpath(3) Full documentation at: <http://www.gnu.org/software/coreutils/readlink> or available locally via: info '(coreutils) readlink invocation' GNU coreutils 8.28 January 2018 READLINK(1)
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