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en:docs:fapi:dosfindfirst [2018/08/30 14:22] – created prokushev | en:docs:fapi:dosfindfirst [2021/09/18 04:52] (current) – prokushev | ||
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+ | {{page> | ||
+ | |||
+ | ====== DosFindFirst ====== | ||
This call finds the first file object or group of file objects whose name(s) match the specification. | This call finds the first file object or group of file objects whose name(s) match the specification. | ||
- | ==Syntax== | + | ===== Syntax ===== |
+ | <code c> | ||
| | ||
| | ||
+ | </ | ||
+ | ===== Parameters ===== | ||
+ | |||
+ | * FileName ([[PSZ]]) - input : Address of the ASCIIZ path name of the file or subdirectory to be found. The name component may contain global file name characters. | ||
+ | * DirHandle ([[PHDIR]]) - input/ | ||
+ | * 0001H - Assign handle 1, which is always available to a process. | ||
+ | * FFFFH - The system allocates and returns a handle. If on input FFFFH is specified, on output DirHandle contains the handle allocated by the system. | ||
+ | |||
+ | The DosFindFirst handle is used with subsequent DosFindNext requests. Reuse of this handle in another DosFindFirst closes the association with the previous DosFindFirst and opens a new association. | ||
+ | |||
+ | * Attribute ([[USHORT]]) - input : Attribute value that determines the file objects to be searched for. | ||
+ | |||
+ | ^ Bit ^ Description ^ | ||
+ | | 15-6 | Reserved and must be zero | | ||
+ | | 5 | File archive | | ||
+ | | 4 | Subdirectory | | ||
+ | | 3 | Reserved and must be zero | | ||
+ | | 2 | System file | | ||
+ | | 1 | Hidden file | | ||
+ | | 0 | Read only file | | ||
- | ==Parameters== | ||
- | ;FileName (PSZ) - input : Address of the ASCIIZ path name of the file or subdirectory to be found. The name component may contain global file name characters. | ||
- | ;DirHandle (PHDIR) - input/ | ||
- | :0001H - Assign handle 1, which is always available to a process. | ||
- | :FFFFH - The system allocates and returns a handle. If on input FFFFH is specified, on output :DirHandle contains the handle allocated by the system. | ||
- | :The DosFindFirst handle is used with subsequent DosFindNext requests. Reuse of this handle in another DosFindFirst closes the association with the previous DosFindFirst and opens a new association. | ||
- | ;Attribute (USHORT) - input : Attribute value that determines the file objects to be searched for. | ||
- | ''' | ||
- | | ||
- | | ||
- | | ||
- | | ||
- | | ||
- | | ||
- | | ||
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. | 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. | ||
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Attribute cannot specify the volume label. Volume labels are queried using DosQFSInfo. Attributes of a file are queried and set with DosQFileMode and DosSetFileMode. | Attribute cannot specify the volume label. Volume labels are queried using DosQFSInfo. Attributes of a file are queried and set with DosQFileMode and DosSetFileMode. | ||
- | ; ResultBuf (PFILEFINDBUF) - output : Address of the structure that contains the returned directory information. The information reflects the last DosClose, DosBufReset, | + | * ResultBuf ([[PFILEFINDBUF]]) - output : Address of the structure that contains the returned directory information. The information reflects the last DosClose, DosBufReset, |
- | * 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. | + | |
- | * length (UCHAR) : Length of the ASCIIZ name string. | + | |
- | * matchfilename (CHAR) : ASCIIZ name string for the first occurrence of FileName. | + | |
- | ; ResultBufLen (USHORT) - input : Length of ResultBuf | + | * ResultBufLen ([[USHORT]]) - input : Length of ResultBuf |
- | ; SearchCount (PUSHORT) - input/ | + | * SearchCount ([[PUSHORT]]) - input/ |
- | ; Reserved (ULONG) - input : Reserved, must be set to zero. | + | * Reserved ([[ULONG]]) - input : Reserved, must be set to zero. |
+ | |||
+ | ===== Return Code ===== | ||
+ | |||
+ | rc ([[USHORT]]) - return | ||
- | ==Return Code== | ||
- | rc (USHORT) - return | ||
Return code descriptions are: | Return code descriptions are: | ||
- | * 0 NO_ERROR | + | |
- | * 2 ERROR_FILE_NOT_FOUND | + | |
- | * 3 ERROR_PATH_NOT_FOUND | + | * 2 ERROR_FILE_NOT_FOUND |
- | * 6 ERROR_INVALID_HANDLE | + | * 3 ERROR_PATH_NOT_FOUND |
- | * 18 | + | * 6 ERROR_INVALID_HANDLE |
- | * 26 | + | * 18 |
- | * 87 | + | * 26 |
- | * 108 ERROR_DRIVE_LOCKED | + | * 87 |
- | * 111 ERROR_BUFFER_OVERFLOW | + | * 108 ERROR_DRIVE_LOCKED |
- | * 113 ERROR_NO_MORE_SEARCH_HANDLES | + | * 111 ERROR_BUFFER_OVERFLOW |
- | * 206 ERROR_FILENAME_EXCED_RANGE | + | * 113 ERROR_NO_MORE_SEARCH_HANDLES |
- | ==Remarks== | + | * 206 ERROR_FILENAME_EXCED_RANGE |
+ | |||
+ | ===== Remarks ===== | ||
DosFindFirst returns directory entries (up to the number requested in SearchCount) for as many files or subdirectories whose names and attributes match the specification and whose information fits in ResultBuf. On output, SearchCount contains the actual number of directory entries returned. | DosFindFirst returns directory entries (up to the number requested in SearchCount) for as many files or subdirectories whose names and attributes match the specification and whose information fits in ResultBuf. On output, SearchCount contains the actual number of directory entries returned. | ||
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For programs running without the NEWFILES bit set, only 8.3 filename format names are returned. These names are changed to uppercase. | For programs running without the NEWFILES bit set, only 8.3 filename format names are returned. These names are changed to uppercase. | ||
- | ===Family API Considerations=== | + | ==== Family API Considerations ==== |
Some options operate differently in the DOS mode than in OS/2 mode. Therefore, the following restrictions apply to DosFindFirst when coding for the DOS mode: | Some options operate differently in the DOS mode than in OS/2 mode. Therefore, the following restrictions apply to DosFindFirst when coding for the DOS mode: | ||
DirHandle must always equal hex 0001H or FFFFH on the initial call to DosFindFirst. Subsequent calls to DosFindFirst must have a DirHandle of hex 0001H unless a DosFindClose had been issued. In this case, 0001H or FFFFH is allowed. | DirHandle must always equal hex 0001H or FFFFH on the initial call to DosFindFirst. Subsequent calls to DosFindFirst must have a DirHandle of hex 0001H unless a DosFindClose had been issued. In this case, 0001H or FFFFH is allowed. | ||
- | ==Example Code== | + | ===== Example Code ===== |
- | ===C Binding=== | + | |
- | <PRE> | + | ==== C Binding ==== |
+ | |||
+ | <code c> | ||
typedef struct _FDATE { /* fdate */ | typedef struct _FDATE { /* fdate */ | ||
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USHORT | USHORT | ||
- | </PRE> | + | </code> |
This example searches for a file matching the pattern ' | This example searches for a file matching the pattern ' | ||
- | <PRE> | + | <code c> |
#define INCL_DOSFILEMGR | #define INCL_DOSFILEMGR | ||
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& | & | ||
| | ||
- | </PRE> | + | </code> |
- | ===MASM Binding=== | + | ==== MASM Binding ==== |
- | <PRE> | + | |
+ | <code asm> | ||
FDATE struc | FDATE struc | ||
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CALL | CALL | ||
+ | </ | ||
Returns WORD | Returns WORD | ||
- | </ | ||
- | ====== Note ====== | + | ===== Note ===== |
Text based on [[http:// | Text based on [[http:// | ||
{{page> | {{page> |