03-15-2007
This is why relative paths have problems sometimes. There isn't a good way to handle absolutely any relative path, because all relative paths have an assumption:
the current working directory is "x".
You are assuming /home/polypus. Unix tools are designed to do one thing very well. It's hard to make a bulletproof tool because of the cwd assumption.
Because:
Obviously it may not be true.
So, there is no really elegant way to deal with it. You're onto one way to deal with it.
For programming, you should consider avoiding relative paths unless you want the code to work if and only if it runs from a certain directory.
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LEARN ABOUT DEBIAN
latexml::util::pathname
LaTeXML::Util::Pathname(3pm) User Contributed Perl Documentation LaTeXML::Util::Pathname(3pm)
NAME
"LaTeXML::Util::Pathname" - portable pathname and file-system utilities
DESCRIPTION
This module combines the functionality File::Spec and File::Basename to give a consistent set of filename utilties for LaTeXML. A pathname
is represented by a simple string.
Pathname Manipulations
"$path = pathname_make(%peices);"
Constructs a pathname from the keywords in pieces
dir : directory
name : the filename (possibly with extension)
type : the filename extension
"($dir,$name,$type) = pathname_split($path);"
Splits the pathname $path into the components: directory, name and type.
"$path = pathname_canonical($path);"
Canonicallizes the pathname $path by simplifying repeated slashes, dots representing the current or parent directory, etc.
"$dir = pathname_directory($path);"
Returns the directory component of the pathname $path.
"$name = pathname_name($path);"
Returns the name component of the pathname $path.
"$type = pathname_type($path);"
Returns the type component of the pathname $path.
"$path = pathname_concat($dir,$file);"
Returns the pathname resulting from concatenating the directory $dir and filename $file.
"$boole = pathname_is_absolute($path);"
Returns whether the pathname $path appears to be an absolute pathname.
"$path = pathname_relative($path,$base);"
Returns the path to file $path relative to the directory $base.
"$path = pathname_absolute($path,$base);"
Returns the absolute pathname resulting from interpretting $path relative to the directory $base. If $path is already absolute, it is
returned unchanged.
File System Operations
"$modtime = pathname_timestamp($path);"
Returns the modification time of the file named by $path, or undef if the file does not exist.
"$path = pathname_cwd();"
Returns the current working directory.
"$dir = pathname_mkdir($dir);"
Creates the directory $dir and all missing ancestors. It returns $dir if successful, else undef.
"$dest = pathname_copy($source,$dest);"
Copies the file $source to $dest if needed; ie. if $dest is missing or older than $source. It preserves the timestamp of $source.
"$path = pathname_find($name,%options);"
Finds the first file named $name that exists and that matches the specification in the keywords %options. An absolute pathname is
returned.
If $name is not already an absolute pathname, then the option "paths" determines directories to recursively search. It should be a
list of pathnames, any relative paths are interpreted relative to the current directory. If "paths" is omitted, then the current
directory is searched.
If the option "installation_subdir" is given, it indicates, in addition to the above, a directory relative to the LaTeXML installation
directory to search. This allows files included with the distribution to be found.
The "types" option specifies a list of filetypes to search for. If not supplied, then the filename must match exactly.
"@paths = pathname_findall($name,%options);"
Like "pathname_find", but returns all matching paths that exist.
AUTHOR
Bruce Miller <bruce.miller@nist.gov>
COPYRIGHT
Public domain software, produced as part of work done by the United States Government & not subject to copyright in the US.
perl v5.10.1 2009-06-11 LaTeXML::Util::Pathname(3pm)