Library: File system utilities (OMVFS) legacy Include: omvfs.xin

Purpose

The vfsDir OMX component represents a directory location. Once a connection to a directory has been established using either of these functions, that connection can be used by other vfs functions.

Usage Notes

The OmniMark Virtual File System dynamic link library file ("omvfs.dll") creates the vfsDir OMX component. The related include file ("omvfs.xin") defines the interface to that component. To use vfsDir OMX components in your program, you must include the following include statement in your program:

     include "omvfs.xin"

Please refer to OMX Components for a general description of OMX components and how they are used.

Related OMVFS library functions:

The functions

• vfsConnect - create a connection to a directory location expressed using the file scheme for URLs.
• vfsConnectDir - create a connection to a directory location expressed using the file scheme for URLs.
• vfsFileDir - get the directory location of the specified file.
• vfsDisconnect - discard a directory connection that is no longer needed.

• vfsChangeDir - change the current working directory.
• vfsCopy - copy a file or a directory.
• vfsDeleteDir - remove an existing directory from the virtual file system.
• vfsDeleteFile - remove an existing file from the virtual file system.
• vfsDescribe - obtain a description of a file or a directory.
• vfsDirName - return the name of the current working directory.
• vfsLink - create a symbolic link for a file or subdirectory. (Unix only)
• vfsList - list the files and/or subdirectories in a directory.
• vfsMakeDir - create a new subdirectory under an existing directory on your local file system.
• vfsMove - move a file or a directory.
• vfsOpen - open a file.

Example: Using a vfsDir object

This example shows a connection to a directory being established, and that connection being used by other vfs functions.

  include "omvfs.xin"
  process
    local vfsFile myFile
    local vfsDir myDir
    local stream attributes-shelf variable
    	. . .
    set myDir to vfsConnect "file:///omprogs/"
    	. . .
    set myFile to vfsOpen "jean-sibelius.txt" 
    	on myDir for vfs-read 
    	. . .
    vfsDescribeFile myFile into attributes-shelf
    output "    Name:   " || attributes-shelf{"name"} || "%n"
    output "    Size:   " || attributes-shelf{"size"} || " bytes%n"
    do when attributes-shelf{"isdir"} = 0
      output "    Type:   file" || "%n"
    else
      output "    Type:   directory" || "%n"
    done
    output "Contents:  " || vfsRead myFile || "%n"

This program produces the following output:

  Name:   file:///omprogs/jean-sibelius.txt
      Size:   115 bytes
      Type:   file
  Contents:  "Pay no attention to what the critics say; no statue has ever been erected to a critic."
       -- Jean Sibelius

Other Library Functions    vfsChangeDir    vfsChangeOwner    vfsChangePermissions    vfsClose    vfsConnect    vfsConnectDir    vfsCopy    vfsCursorPosition    vfsDeleteDir    vfsDeleteFile    vfsDescribe    vfsDescribeFile    vfsDir    vfsDirName    vfsDisconnect    vfsFile    vfsFileDir    vfsFileName    vfsIsVersionCompatible    vfsLibraryVersion    vfsLink    vfsList    vfsLock    vfsMakeDir    vfsMove    vfsMoveCursor    vfsOpen    vfsRead    vfsRename    vfsTruncate    vfsUnlock    vfsWrite

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