DosSetFileMode

This call changes the mode (attribute) of the specified file.

Syntax

DosSetFileMode (FileName, NewAttribute, Reserved) 

Parameters

FileName (PSZ) - input

Address of the file path name.

DosQSysInfo is called by an application during initialization to determine the maximum path length allowed by OS/2.

NewAttribute (USHORT) - input

File's new attribute. File attributes are defined as follows:

Bit        Description
15-6        Reserved and must be zero.
5        File archive
4        Subdirectory
3        Volume label
2        System file (excluded from normal directory searches)
1        Hidden file
0        Read only file

These bits may be set individually or in combination. For example, an attribute value of 0021H (bits 5 and 0 set to 1) indicates a read-only file that should be archived.

Reserved (ULONG) - input

Reserved must be set to zero.

Return Code

rc (USHORT) - return

Return code descriptions are:

• 0 NO_ERROR
• 2 ERROR_FILE_NOT_FOUND
• 3 ERROR_PATH_NOT_FOUND
• 5 ERROR_ACCESS_DENIED
• 26 ERROR_NOT_DOS_DISK
• 32 ERROR_SHARING_VIOLATION
• 36 ERROR_SHARING_BUFFER_EXCEEDED
• 87 ERROR_INVALID_PARAMETER
• 108 ERROR_DRIVE_LOCKED
• 206 ERROR_FILENAME_EXCED_RANGE

Remarks

Attributes for Volume Label (0008H) and Subdirectory (0010H) cannot be changed using DosSetFileMode. If these attributes are specified, ERROR_INVALID_PARAMETER is returned.

DosQFileMode is used to query the current settings for file attributes. Calling DosQFSInfo obtains volume label information.

Attributes of root directories cannot be changed using DosSetFileMode. If these attributes are specified, ERROR_ACCESS_DENIED is returned.

Example Code

C Binding

#define INCL_DOSFILEMGR

USHORT  rc = DosSetFileMode(FileName, NewAttribute, Reserved);

PSZ              FileName;      /* File path name string */
USHORT           NewAttribute;  /* New attribute of file */
ULONG            0;             /* Reserved (must be zero) */

USHORT           rc;            /* return code */

MASM Binding

EXTRN  DosSetFileMode:FAR
INCL_DOSFILEMGR     EQU 1

PUSH@  ASCIIZ  FileName      ;File path name string
PUSH   WORD    NewAttribute  ;New attribute of file
PUSH   DWORD   0             ;Reserved (must be zero)
CALL   DosSetFileMode

Returns WORD

Related Functions

• DosQFileMode