Bfile CreateEntry OS

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Revision as of 18:25, 29 July 2014 by Gbl08ma (talk | contribs)
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Header: fxcg/file.h
Syscall index: 0x1DAE
Function signature: int Bfile_CreateEntry_OS(const unsigned short* filename, int mode, int *size)

Creates a file or folder in storage memory.


  • filename - A 16 bit character array, most likely generated by Bfile_StrToName_ncpy.
  • mode - Used to determine whether a file or folder will be made.
  • size - A pointer to the size of the file, NULL if making a folder.


0 on success, or a negative error code on failure.


Does not return a handle for created files. Use Bfile_OpenFile_OS after a successful creation.

The following are the modes that can be used:

  • 1 - CREATEMODE_FILE - Makes a file using the size provided.
  • 5 - CREATEMODE_FOLDER - Makes a folder. Size should be NULL.

This function is a combination of fopen's file creation and mkdir. Please note that the size of the file must be set upon creation. Files are dynamically expandable (using Bfile_WriteFile_OS past the end of a file), but currently there's no known way to shrink a file. You can delete and re-create to reduce a file's size; if you expect to do it frequently, using the main memory may be more appropriate.