DosSetPathInfo (OS/2 1.x)

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

Syntax

DosSetPathInfo (PathName, PathInfoLevel, PathInfoBuf, PathInfoBufSize,
                PathInfoFlags, Reserved)

Parameters

PathName (PSZ) - input

Address of the ASCIIZ full path name of the file or subdirectory. Global file name characters are not permitted.

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

PathInfoLevel (USHORT) - input

Level of file object information being defined. A value of 1 or 2 can be specified. The structures described in PathInfoBuf indicate the information being set for each of these levels.

PathInfoBuf (PBYTE) - input

Address of the storage area containing the file information being set.

Level 1 Information

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

filedate (FDATE) : Structure containing the date of creation.

15-9 - Year, in binary, of creation

8-5 - Month, in binary, of creation

4-0 - Day, in binary, of creation.

filetime (FTIME) : Structure containing the time of creation.

15-11 - Hours, in binary, of creation

10-5 - Minutes, in binary, of creation

4-0 - Seconds, in binary number of two-second increments, of 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.

Level 2 Information

PathInfoBuf 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.

Error (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.

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.

PathInfoBufSize (USHORT) - input

Length of PathInfoBuf.

PathInfoFlags (USHORT) - input

PathInfoFlags contain information on how the set operation is performed. Only one bit is defined. If PathInfoFlags = 0010H, then the information being set must be written out to disk before returning to the application. This guarantees that the EAs have been written to disk. All other bits are reserved and must be zero.

Reserved (ULONG) - input

Reserved, must be set to zero.

Return Code

rc (USHORT) - return

Return code descriptions are:

• 0 NO_ERROR
• 32 ERROR_SHARING_VIOLATION
• 87 ERROR_INVALID_PARAMETER
• 124 ERROR_INVALID_LEVEL
• 206 ERROR_FILENAME_EXCED_RANGE
• 122 ERROR_INSUFFICIENT_BUFFER
• 254 ERROR_INVALID_EA_NAME
• 255 ERROR_EA_LIST_INCONSISTENT

Remarks

To set any level of file information for a file or subdirectory with DosSetPathInfo, a process must have exclusive write access to the closed file object. Thus, if the file object is already accessed by another process, a call to DosSetPathInfo fails.

A zero (0) value in both the date and time components of a field cause that field to be left unchanged. For example, if both "Last write date" and "Last write time" are specified as zero in the Level 0001H 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, then both attributes of the file are set to the new values.

The write-through bit in PathInfo Flags should be used only in cases where it is necessary, for data integrity purposes, to write the EAs out to disk immediately, instead of caching them and writing them out later. Setting the write-through bit all the time may degrade the performance.

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

Binding

C

typedef struct _GEA {       /* gea */
  BYTE cbName;            /* name length not including NULL */
  CHAR szName[1];         /* attribute name */
} GEA;

typedef struct _GEALIST {   /* geal */
  ULONG  cbList;          /* total bytes of structure including full list */
  GEA list[1];            /* variable length GEA structures */
} GEALIST;

typedef struct _FEA {       /* fea */
  BYTE fEA;               /* flags */
  BYTE cbName;            /* name length not including NULL */
  USHORT cbValue;         /* value length */
} FEA;

typedef struct _FEALIST {   /* feal */
  ULONG  cbList;          /* total bytes of structure including full list */
  FEA list[1];            /* variable length FEA structures */
} FEALIST;

typedef struct _EAOP {      /* eaop */
  PGEALIST fpGEAList;     /* general EA list */
  PFEALIST fpFEAList;     /* full EA list */
  ULONG  oError;
} EAOP;

#define INCL_DOSFILEMGR

USHORT  rc = DosSetPathInfo(PathName, PathInfoLevel, PathInfoBuf,
                              PathInfoBufSize, PathInfoFlags, 0);

PSZ     PathName;        /* File or directory path name string */
USHORT  PathInfoLevel;   /* Info data type */
PBYTE   PathInfoBuf;     /* Info buffer  */
USHORT  PathInfoBufSize; /* Info buffer size */
USHORT  PathInfoFlags;   /* Path info flags */
ULONG   0;               /* Reserved (must be zero)  */

USHORT  rc;              /* return code */

MASM

GEA    struc
  gea_cbName      db  ?          ;name length not including NULL
  gea_szName      db  1 dup (?)  ;attribute name
GEA    ends

GEALIST    struc
  geal_cbList     dd  ?      ;total bytes of structure including full list
  geal_list       db  size GEA * 1 dup (?) ;variable length GEA structures
GEALIST    ends

FEA   struc
  fea_fEA         db  ? ;flags
  fea_cbName      db  ? ;name length not including NULL
  fea_cbValue     dw  ? ;value length
FEA   ends

FEALIST struc
  feal_cbList     dd  ?      ;total bytes of structure including full list
  feal_list       db  size FEA * 1 dup (?) ;variable length FEA structures
FEALIST ends

EAOP    struc
  eaop_fpGEAList  dd  ? ;general EA list
  eaop_fpFEAList  dd  ? ;full EA list
  eaop_oError     dd  ? ;
EAOP    ends

EXTRN DosSetPathInfo:FAR
INCL_DOSFILEMGR     EQU 1

PUSH@  ASCIIZ PathName        ;File or directory path name string
PUSH   WORD   PathInfoLevel   ;Info data type
PUSH@  OTHER  PathInfoBuf     ;Info buffer
PUSH   WORD   PathInfoBufSize ;Info buffer size
PUSH   WORD   Flags           ;Path info flags
PUSH   DWORD  0               ;Reserved (must be zero)
CALL   DosSetPathInfo

Returns WORD