file::spec::vms(3pm) [redhat man page]
File::Spec::VMS(3pm) Perl Programmers Reference Guide File::Spec::VMS(3pm) NAME
File::Spec::VMS - methods for VMS file specs SYNOPSIS
require File::Spec::VMS; # Done internally by File::Spec if needed DESCRIPTION
See File::Spec::Unix for a documentation of the methods provided there. This package overrides the implementation of these methods, not the semantics. eliminate_macros Expands MM[KS]/Make macros in a text string, using the contents of identically named elements of %$self, and returns the result as a file specification in Unix syntax. fixpath Catchall routine to clean up problem MM[SK]/Make macros. Expands macros in any directory specification, in order to avoid juxtaposing two VMS-syntax directories when MM[SK] is run. Also expands expressions which are all macro, so that we can tell how long the expan- sion is, and avoid overrunning DCL's command buffer when MM[KS] is running. If optional second argument has a TRUE value, then the return string is a VMS-syntax directory specification, if it is FALSE, the return string is a VMS-syntax file specification, and if it is not specified, fixpath() checks to see whether it matches the name of a directory in the current default directory, and returns a directory or file specification accordingly. Methods always loaded canonpath (override) Removes redundant portions of file specifications according to VMS syntax. catdir Concatenates a list of file specifications, and returns the result as a VMS-syntax directory specification. No check is made for "impossible" cases (e.g. elements other than the first being absolute filespecs). catfile Concatenates a list of file specifications, and returns the result as a VMS-syntax file specification. curdir (override) Returns a string representation of the current directory: '[]' devnull (override) Returns a string representation of the null device: '_NLA0:' rootdir (override) Returns a string representation of the root directory: 'SYS$DISK:[000000]' tmpdir (override) Returns a string representation of the first writable directory from the following list or '' if none are writable: sys$scratch: $ENV{TMPDIR} Since perl 5.8.0, if running under taint mode, and if $ENV{TMPDIR} is tainted, it is not used. updir (override) Returns a string representation of the parent directory: '[-]' case_tolerant (override) VMS file specification syntax is case-tolerant. path (override) Translate logical name DCL$PATH as a searchlist, rather than trying to "split" string value of $ENV{'PATH'}. file_name_is_absolute (override) Checks for VMS directory spec as well as Unix separators. splitpath (override) Splits using VMS syntax. splitdir (override) Split dirspec using VMS syntax. catpath (override) Construct a complete filespec using VMS syntax abs2rel (override) Use VMS syntax when converting filespecs. rel2abs (override) Use VMS syntax when converting filespecs. SEE ALSO
File::Spec perl v5.8.0 2002-06-01 File::Spec::VMS(3pm)
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File::Spec::Unix(3pm) Perl Programmers Reference Guide File::Spec::Unix(3pm) NAME
File::Spec::Unix - File::Spec for Unix, base for other File::Spec modules SYNOPSIS
require File::Spec::Unix; # Done automatically by File::Spec DESCRIPTION
Methods for manipulating file specifications. Other File::Spec modules, such as File::Spec::Mac, inherit from File::Spec::Unix and over- ride specific methods. METHODS
canonpath() No physical check on the filesystem, but a logical cleanup of a path. On UNIX eliminates successive slashes and successive "/.". $cpath = File::Spec->canonpath( $path ) ; catdir() Concatenate two or more directory names to form a complete path ending with a directory. But remove the trailing slash from the resulting string, because it doesn't look good, isn't necessary and confuses OS2. Of course, if this is the root directory, don't cut off the trailing slash :-) catfile Concatenate one or more directory names and a filename to form a complete path ending with a filename curdir Returns a string representation of the current directory. "." on UNIX. devnull Returns a string representation of the null device. "/dev/null" on UNIX. rootdir Returns a string representation of the root directory. "/" on UNIX. tmpdir Returns a string representation of the first writable directory from the following list or "" if none are writable: $ENV{TMPDIR} /tmp Since perl 5.8.0, if running under taint mode, and if $ENV{TMPDIR} is tainted, it is not used. updir Returns a string representation of the parent directory. ".." on UNIX. no_upwards Given a list of file names, strip out those that refer to a parent directory. (Does not strip symlinks, only '.', '..', and equivalents.) case_tolerant Returns a true or false value indicating, respectively, that alphabetic is not or is significant when comparing file specifications. file_name_is_absolute Takes as argument a path and returns true if it is an absolute path. This does not consult the local filesystem on Unix, Win32, OS/2 or Mac OS (Classic). It does consult the working environment for VMS (see "file_name_is_absolute" in File::Spec::VMS). path Takes no argument, returns the environment variable PATH as an array. join join is the same as catfile. splitpath ($volume,$directories,$file) = File::Spec->splitpath( $path ); ($volume,$directories,$file) = File::Spec->splitpath( $path, $no_file ); Splits a path in to volume, directory, and filename portions. On systems with no concept of volume, returns undef for volume. For systems with no syntax differentiating filenames from directories, assumes that the last file is a path unless $no_file is true or a trailing separator or /. or /.. is present. On Unix this means that $no_file true makes this return ( '', $path, '' ). The directory portion may or may not be returned with a trailing '/'. The results can be passed to "catpath()" to get back a path equivalent to (usually identical to) the original path. splitdir The opposite of "catdir()". @dirs = File::Spec->splitdir( $directories ); $directories must be only the directory portion of the path on systems that have the concept of a volume or that have path syntax that differentiates files from directories. Unlike just splitting the directories on the separator, empty directory names ('') can be returned, because these are significant on some OSs. On Unix, File::Spec->splitdir( "/a/b//c/" ); Yields: ( '', 'a', 'b', '', 'c', '' ) catpath() Takes volume, directory and file portions and returns an entire path. Under Unix, $volume is ignored, and directory and file are cate- nated. A '/' is inserted if needed (though if the directory portion doesn't start with '/' it is not added). On other OSs, $volume is significant. abs2rel Takes a destination path and an optional base path returns a relative path from the base path to the destination path: $rel_path = File::Spec->abs2rel( $path ) ; $rel_path = File::Spec->abs2rel( $path, $base ) ; If $base is not present or '', then cwd() is used. If $base is relative, then it is converted to absolute form using "rel2abs()". This means that it is taken to be relative to cwd(). On systems with the concept of a volume, this assumes that both paths are on the $destination volume, and ignores the $base volume. On systems that have a grammar that indicates filenames, this ignores the $base filename as well. Otherwise all path components are assumed to be directories. If $path is relative, it is converted to absolute form using "rel2abs()". This means that it is taken to be relative to cwd(). No checks against the filesystem are made. On VMS, there is interaction with the working environment, as logicals and macros are expanded. Based on code written by Shigio Yamaguchi. rel2abs() Converts a relative path to an absolute path. $abs_path = File::Spec->rel2abs( $path ) ; $abs_path = File::Spec->rel2abs( $path, $base ) ; If $base is not present or '', then cwd() is used. If $base is relative, then it is converted to absolute form using "rel2abs()". This means that it is taken to be relative to cwd(). On systems with the concept of a volume, this assumes that both paths are on the $base volume, and ignores the $path volume. On systems that have a grammar that indicates filenames, this ignores the $base filename as well. Otherwise all path components are assumed to be directories. If $path is absolute, it is cleaned up and returned using "canonpath()". No checks against the filesystem are made. On VMS, there is interaction with the working environment, as logicals and macros are expanded. Based on code written by Shigio Yamaguchi. SEE ALSO
File::Spec perl v5.8.0 2002-06-01 File::Spec::Unix(3pm)