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Full Discussion: absolute path
Top Forums Programming absolute path Post 302120316 by jim mcnamara on Tuesday 5th of June 2007 04:58:03 PM
Old 06-05-2007
You do realize there can be more than one hard link for a given file, plus there may be multiple symlinks as well. When you call fopen ("/path/to/foo", "r"), foo can easily be a link. So you may not have the real path to start with.

So going "up" the file tree is not going to give you a perfect answer all the time.

I'm not giving you a hard time, it's just that working out whre a file is in all the filesystems on one box is a daunting task. find / -name <> -inode <> is about as good as it gets, even if it is really slow.

In your example, if you're postive foldera or folderb or folderc are under /root then your task is:

get st_dev and st_ino for the file you do have
with popen(), "find /root -name afile -inode st_ino", then stat all of the files returned.
check the st_dev values, when you have a match you have the file.
 

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LEARN ABOUT DEBIAN

devel::cover::test

Devel::Cover::Test(3pm) 				User Contributed Perl Documentation				   Devel::Cover::Test(3pm)

NAME

       Devel::Cover::Test - Internal module for testing

VERSION

       version 0.89

METHODS

   new
	 my $test = Devel::Cover::Test->new($test, criteria => $string)

       Constructor.

       "criteria" parameter (optional, defaults to "statement branch condition subroutine") is a space separated list of tokens.  Supported tokens
       are "statement", "branch", "condition", "subroutine" and "pod".

       More optional parameters are supported. Refer to "get_params" sub.

   shell_quote
	 my $quoted_item = shell_quote($item)

       Returns properly quoted item to cope with embedded spaces.

   perl
	 my $perl = $self->perl()

       Returns absolute path to Perl interpreter with proper -I options (blib-wise).

   test_command
	 my $command = $self->test_command()

       Returns test command, made of:

       absolute path to Perl interpreter
       Devel::Cover -M option (if applicable)
       test file
       test file parameters (if applicable)

   cover_command
	 my $command = $self->cover_command()

       Returns test command, made of:

       absolute path to Perl interpreter
       absolute path to cover script
       cover parameters

   test_file
	 my $file = $self->test_file()

       Returns absolute path to test file.

   test_file_parameters
	 my $parameters = $self->test_file_parameters()

       Accessor to test_file_parameters property.

   cover_gold
	 my ($base, $v) = $self->cover_gold;

       Returns the absolute path of the base to the golden file and the suffix version number.

       $base comes from the name of the test and $v will be $] from the earliest perl version for which the golden results should be the same as
       for the current $]

   run_command
	 $self->run_command($command)

       Runs command, most likely obtained from "test_command" sub.

BUGS

       Huh?

LICENCE

       Copyright 2001-2012, Paul Johnson (paul@pjcj.net)

       This software is free.  It is licensed under the same terms as Perl itself.

       The latest version of this software should be available from my homepage: http://www.pjcj.net

perl v5.14.2							    2012-06-15						   Devel::Cover::Test(3pm)
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