DosSetFileInfo

This call sets attribute and extended attribute information for a file.

DosSetFileInfo

(FileHandle, FileInfoLevel, FileInfoBuf, FileInfoBufSize)

FileHandle (HFILE) - input

File handle.
FileInfoLevel (USHORT) - input
Level of file information being set. A value of 1 or 2 can be specified. The structures described in FileInfoBuf indicate the information being set for each of these levels.
FileInfoBuf (PBYTE) - input
Address of the storage area containing the structures for file information levels.

Level 1 Information

FileInfoBuf contains the following structure, to which information is specified in the following format:

filedate (FDATE)

Structure containing the date of file creation.

Bit

Description
15-9
Year, in binary, of file creation
8-5
Month, in binary, of file creation
4-0
Day, in binary, of file creation.
filetime (FTIME)
Structure containing the time of file creation.

Bit

Description
15-11
Hours, in binary, of file creation
10-5
Minutes, in binary, of file creation
4-0
Seconds, in binary number of two-second increments, of file creation.
fileaccessdate (FDATE)
Structure containing the date of last access. See FDATE in filedate.
fileaccesstime (FTIME)
Structure containing the time of last access. See FTIME in filetime.
writeaccessdate (FDATE)
Structure containing the date of last write. See FDATE in filedate.
writeaccesstime (FTIME)
Structure containing the time of last write. See FTIME in filetime.
filesize (ULONG)
File size.
filealloc (ULONG)
Allocated file size.
fileattrib (USHORT)
Attributes of the file, defined in DosSetFileMode.
Level 2 Information
FileInfoBuf contains an EAOP structure, which has the following format:

fpGEAList (PGEALIST)

Address of GEAList. GEAList is a packed array of variable length "get EA" structures, each containing an EA name and the length of the name.
fpFEAList (PFEALIST)
Address of FEAList. FEAList is a packed array of variable length "full EA" structures, each containing an EA name and its corresponding value, as well as the lengths of the name and the value.
oError (ULONG)
Offset into structure where error has occurred.
Level 2 sets a series of EA name/value pairs. On input, FileInfoBuf is an EAOP structure above. fpGEAList is ignored. fpFEAList points to a data area where the relevant FEA list is to be found. oError is ignored. Following is the format of the FEAList structure:

cbList (ULONG)

Length of the FEA list, including the length itself.
list (FEA)
List of FEA structures. An FEA structure has the following format:

Flags (BYTE)

Bit indicator describing the characteristics of the EA being defined.

Bit

Description
7
Critical EA.
6-0
Reserved and must be set to zero.
If bit 7 is set to 1, this indicates a critical EA. If bit 7 is 0, this means the EA is noncritical; that is, the EA is not essential to the intended use by an application of the file with which it is associated.
cbName (BYTE)
Length of EA ASCIIZ name, which does not include the null character.
cbValue (USHORT)
Length of EA value, which cannot exceed 64KB.
szName (PSZ)
Address of the ASCIIZ name of EA.
aValue (PSZ)
Address of the free-format value of EA.
Note:
The szName and aValue fields are not included as part of header or include files. Because of their variable lengths, these entries must be built manually.
On output, fpGEAList is unchanged. fpFEAList is unchanged as is the area pointed to by fpFEAList. If an error occurred during the set, oError is the offset of the FEA where the error occurred. The API return code is the error code corresponding to the condition generating the error. If no error occurred, oError is undefined.
FileInfoBufSize (USHORT) - input
Length of FileInfoBuf.
rc (USHORT) - return
Return code descriptions are:
• NO_ERROR 1
  ERROR_INVALID_FUNCTION
  5
  ERROR_ACCESS_DENIED
  6
  ERROR_INVALID_HANDLE
  87
  ERROR_INVALID_PARAMETER
  122
  ERROR_INSUFFICIENT_BUFFER
  124
  ERROR_INVALID_LEVEL
  130
  ERROR_DIRECT_ ACCESS _ HANDLE
  254
  ERROR _ INVALID _ EA _ NAME
  255
  ERROR _ EA _ LIST _ INCONSISTENT
  Remarks

  DosSetFileInfo is successful only when the file is opened for write access, with a deny-both sharing mode specified for access to the file by other processes. If the file is already opened with conflicting sharing rights, the call to DosOpen or DosOpen2 will fail.

  A 0 value in the date and time components of a field does not change the field. For example, if both "last write date" and "last write time" are specified as 0 in the Level 1 information structure, then both attributes of the file are left unchanged. If either "last write date" or "last write time" are specified as non-zero, both attributes of the file are set to the new values.

  The FAT file system supports modification of only the dates and times of the last write. Creation and last access dates and times are not affected.

  The last modification date and time will get changed if the extended attributes are modified.

  
  Family API Considerations

  It is not possible to create a label with leading blank characters in DOS mode, because of restrictions on the previous Interrupt 21h function call (create an FCB type file), which must be used by FAPI.

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