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posxpath.csh

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posxpath.csh
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#  Convert an ordinary DOS-style pathname into POSIX format:

#     1. Set it into correct mixed case since POSIX is case-
#        sensitive.
#     2. If there's an explicit drive letter, be sure the name
#        is a fullpath since there's no way to refer to the
#        current directory on anything but the current drive
#        under POSIX rules.
#     3. Change any from \'s to /'s.
#     4. Convert any drive specification from the usual c: format
#        to the POSIX //C/ format.

#  This routine is particularly useful for creating C shell script
#  "wrappers" around POSIX applications such as those on the Microsoft
#  NT Resource Kit CD to convert filename arguments to POSIX format
#  before the applications are invoked.

#  Note:  This procedure does not work on UNC (network) names because
#  there is no way to convert a UNC name.

#  Copyright (c) 1994-2012 by Hamilton Laboratories.  All rights reserved.

proc posxpath( file )
   if (file != "") then
      if (file =~ "?:*") then
         if (file == substr(file, 3, 1) != "/") @ file = fullpath(file)
         set file = $file:m:gSx\x/x
         @ file = "//$upper(substr(file, 1, 1))/$substr(file, 4)"
      else
         set file = $file:m:gSx\x/x
      end
   else
      @ file = "."
   end
   return $file
end

posxpath $argv

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