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File::DosGlob(3p)Perl Programmers Reference GuidFile::DosGlob(3p)


NAME
       File::DosGlob - DOS like globbing and then some

SYNOPSIS
           require 5.004;

           # override CORE::glob in current package
           use File::DosGlob 'glob';

           # override CORE::glob in ALL packages (use with extreme caution!)
           use File::DosGlob 'GLOBAL_glob';

           @perlfiles = glob  "..\\pe?l/*.p?";
           print <..\\pe?l/*.p?>;

           # from the command line (overrides only in main::)
           > perl -MFile::DosGlob=glob -e "print <../pe*/*p?>"

DESCRIPTION
       A module that implements DOS-like globbing with a few
       enhancements.  It is largely compatible with perlglob.exe
       (the M$ setargv.obj version) in all but one respect--it
       understands wildcards in directory components.

       For example, "<..\\l*b\\file/*glob.p?"> will work as
       expected (in that it will find something like
       '..\lib\File/DosGlob.pm' alright).  Note that all path
       components are case-insensitive, and that backslashes and
       forward slashes are both accepted, and preserved.  You may
       have to double the backslashes if you are putting them in
       literally, due to double-quotish parsing of the pattern by
       perl.

       Spaces in the argument delimit distinct patterns, so
       "glob('*.exe *.dll')" globs all filenames that end in
       ".exe" or ".dll".  If you want to put in literal spaces in
       the glob pattern, you can escape them with either double
       quotes, or backslashes.  e.g. "glob('c:/"Program
       Files"/*/*.dll')", or "glob('c:/Program\ Files/*/*.dll')".
       The argument is tokenized using "Text::Parse-
       Words::parse_line()", so see Text::ParseWords for details
       of the quoting rules used.

       Extending it to csh patterns is left as an exercise to the
       reader.

NOTES
       o   Mac OS (Classic) users should note a few differences.
           The specification of pathnames in glob patterns
           adheres to the usual Mac OS conventions: The path sep-
           arator is a colon ':', not a slash '/' or backslash
           '\'. A full path always begins with a volume name. A
           relative pathname on Mac OS must always begin with a
           ':', except when specifying a file or directory name



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File::DosGlob(3p)Perl Programmers Reference GuidFile::DosGlob(3p)


           in the current working directory, where the leading
           colon is optional. If specifying a volume name only, a
           trailing ':' is required. Due to these rules, a glob
           like <*:> will find all mounted volumes, while a glob
           like <*> or <:*> will find all files and directories
           in the current directory.

           Note that updirs in the glob pattern are resolved
           before the matching begins, i.e. a pattern like
           "*HD:t?p::a*" will be matched as "*HD:a*". Note also,
           that a single trailing ':' in the pattern is ignored
           (unless it's a volume name pattern like "*HD:"), i.e.
           a glob like <:*:> will find both directories and files
           (and not, as one might expect, only directories).

           The metachars '*', '?' and the escape char '\' are
           valid characters in volume, directory and file names
           on Mac OS. Hence, if you want to match a '*', '?' or
           '\' literally, you have to escape these characters.
           Due to perl's quoting rules, things may get a bit com-
           plicated, when you want to match a string like '\*'
           literally, or when you want to match '\' literally,
           but treat the immediately following character '*' as
           metachar. So, here's a rule of thumb (applies to both
           single- and double-quoted strings): escape each '*' or
           '?' or '\' with a backslash, if you want to treat them
           literally, and then double each backslash and your are
           done. E.g.

           - Match '\*' literally

              escape both '\' and '*'  : '\\\*'
              double the backslashes   : '\\\\\\*'

           (Internally, the glob routine sees a '\\\*', which
           means that both '\' and '*' are escaped.)

           - Match '\' literally, treat '*' as metachar

              escape '\' but not '*'   : '\\*'
              double the backslashes   : '\\\\*'

           (Internally, the glob routine sees a '\\*', which
           means that '\' is escaped and '*' is not.)

           Note that you also have to quote literal spaces in the
           glob pattern, as described above.

EXPORTS (by request only)
       glob()

BUGS
       Should probably be built into the core, and needs to stop
       pandering to DOS habits.  Needs a dose of optimizium too.



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File::DosGlob(3p)Perl Programmers Reference GuidFile::DosGlob(3p)


AUTHOR
       Gurusamy Sarathy <gsarATactivestate.com>

HISTORY
       o   Support for globally overriding glob() (GSAR 3-JUN-98)

       o   Scalar context, independent iterator context fixes
           (GSAR 15-SEP-97)

       o   A few dir-vs-file optimizations result in glob impor-
           tation being 10 times faster than using perlglob.exe,
           and using perlglob.bat is only twice as slow as perl-
           glob.exe (GSAR 28-MAY-97)

       o   Several cleanups prompted by lack of compatible perl-
           glob.exe under Borland (GSAR 27-MAY-97)

       o   Initial version (GSAR 20-FEB-97)

SEE ALSO
       perl

       perlglob.bat

       Text::ParseWords
































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