364 lines
8.6 KiB
C
364 lines
8.6 KiB
C
/*++
|
|
|
|
Copyright (c) 1988-1999 Microsoft Corporation
|
|
|
|
Module Name:
|
|
|
|
ffirst.c
|
|
|
|
Abstract:
|
|
|
|
Wrappers for file enumeration
|
|
|
|
--*/
|
|
|
|
#include "cmd.h"
|
|
|
|
PHANDLE FFhandles = NULL;
|
|
unsigned FFhndlsaved = 0;
|
|
extern unsigned DosErr ;
|
|
|
|
BOOLEAN FindFirstNt( PTCHAR, PWIN32_FIND_DATA, PHANDLE );
|
|
BOOLEAN FindNextNt ( PWIN32_FIND_DATA, HANDLE );
|
|
|
|
BOOLEAN FindFirst(
|
|
BOOL(* fctAttribMatch) (PWIN32_FIND_DATA pffBuf, ULONG attr),
|
|
PTCHAR fspec,
|
|
ULONG attr,
|
|
PWIN32_FIND_DATA pffBuf,
|
|
PHANDLE phandle );
|
|
|
|
BOOLEAN FindNext (
|
|
BOOL(* fctAttribMatch) (PWIN32_FIND_DATA pffBuf, ULONG attr),
|
|
PWIN32_FIND_DATA pffBuf,
|
|
ULONG attr,
|
|
HANDLE handle
|
|
);
|
|
|
|
BOOL IsDosAttribMatch( PWIN32_FIND_DATA, ULONG );
|
|
BOOL IsNtAttribMatch( PWIN32_FIND_DATA, ULONG );
|
|
int findclose( HANDLE );
|
|
|
|
//
|
|
// Under OS/2, we always return entries that are normal, archived or
|
|
// read-only (god knows why).
|
|
//
|
|
// SRCHATTR contains those attribute bits that are used for matching.
|
|
//
|
|
#define SRCHATTR (FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM | FILE_ATTRIBUTE_DIRECTORY)
|
|
|
|
/*** IsDosAttribMatch - Simulates the attribute matching from OS/2
|
|
*
|
|
* Purpose:
|
|
* This function determines if the passed in find file buffer has a
|
|
* match under the OS/2 find file rules.
|
|
*
|
|
* Args:
|
|
* ffbuf: Buffer returned from FileFirst or Findnext
|
|
* attr: Attributes to qualify search
|
|
*
|
|
* Returns:
|
|
* TRUE: if buffer has a attribute match
|
|
* FALSE: if not
|
|
*/
|
|
|
|
BOOL
|
|
IsDosAttribMatch(
|
|
IN PWIN32_FIND_DATA pffBuf,
|
|
IN ULONG attr
|
|
) {
|
|
|
|
//
|
|
// We emulate the OS/2 behaviour of attribute matching. The semantics
|
|
// are evil, so I provide no explanation.
|
|
//
|
|
pffBuf->dwFileAttributes &= (0x000000FF & ~(FILE_ATTRIBUTE_NORMAL));
|
|
|
|
if (! ((pffBuf->dwFileAttributes & SRCHATTR) & ~(attr))) {
|
|
return TRUE;
|
|
} else {
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
BOOL
|
|
IsNtAttribMatch(
|
|
PWIN32_FIND_DATA pffBuf,
|
|
ULONG attr
|
|
) {
|
|
|
|
UNREFERENCED_PARAMETER( pffBuf );
|
|
UNREFERENCED_PARAMETER( attr );
|
|
//
|
|
// for nt calls always return entry. selection should
|
|
// should be based upon callers needs. This is primarily used
|
|
// in DIR.
|
|
return( TRUE );
|
|
}
|
|
|
|
/*** f_how_many - find how many files are there per fspec with given attr
|
|
*
|
|
* Args:
|
|
* fspec: String pointer to file specification.
|
|
* attr: Attributes to qualify search
|
|
*
|
|
* Returns:
|
|
* number of files found or -1 if a file is a directory.
|
|
*/
|
|
|
|
int
|
|
f_how_many(
|
|
PTCHAR fspec,
|
|
ULONG attr
|
|
) {
|
|
|
|
WIN32_FIND_DATA ffBuf;
|
|
PWIN32_FIND_DATA pffBuf;
|
|
PHANDLE phandle;
|
|
HANDLE hnFirst ;
|
|
unsigned rc;
|
|
int cnt=0;
|
|
|
|
pffBuf = &ffBuf;
|
|
|
|
|
|
if ( ! ffirst (fspec, attr, pffBuf, &hnFirst )) {
|
|
|
|
if ( ! ffirst (fspec, FILE_ATTRIBUTE_DIRECTORY, pffBuf, &hnFirst )) {
|
|
return (0);
|
|
}
|
|
else {
|
|
findclose(hnFirst);
|
|
return (f_RET_DIR);
|
|
}
|
|
}
|
|
|
|
|
|
do {
|
|
cnt++;
|
|
} while ( fnext (pffBuf, attr, hnFirst ));
|
|
|
|
|
|
findclose(hnFirst) ;
|
|
|
|
return (cnt);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*** ffirst - find first file/directory and set up find handles
|
|
*
|
|
* Purpose:
|
|
* This function opens a find first handle. I also returns the first
|
|
* qualified file/directory. It simulates the DosFindFirst behavior.
|
|
*
|
|
* Args:
|
|
* fspec: String pointer to file specification.
|
|
* attr: Attributes to qualify search
|
|
* ffbuf: Buffer to hold inforation on found file/directory
|
|
* handle: Find first handle
|
|
*
|
|
* Returns:
|
|
* TRUE: If match found
|
|
* FALSE: if not
|
|
* DosErr: Contains return code if FALSE function return
|
|
*/
|
|
|
|
BOOLEAN
|
|
FindFirst(
|
|
IN BOOL(* fctAttribMatch) (PWIN32_FIND_DATA pffBuf, ULONG attr),
|
|
IN PTCHAR fspec,
|
|
IN ULONG attr,
|
|
IN PWIN32_FIND_DATA pffBuf,
|
|
OUT PHANDLE phandle
|
|
) {
|
|
|
|
BOOLEAN rcode = FALSE;
|
|
|
|
//
|
|
// Loop through looking for a file that matching attributes
|
|
//
|
|
*phandle = FindFirstFile(fspec, pffBuf);
|
|
while (*phandle != (HANDLE) -1) {
|
|
if (fctAttribMatch(pffBuf, attr)) {
|
|
DosErr = 0;
|
|
rcode = TRUE;
|
|
break;
|
|
}
|
|
|
|
if (!FindNextFile( *phandle, pffBuf )) {
|
|
FindClose( *phandle );
|
|
*phandle = INVALID_HANDLE_VALUE;
|
|
break;
|
|
}
|
|
}
|
|
|
|
//
|
|
// If we did find a file (have a handle to prove it) then
|
|
// setup a table of saved open find first handles. If we have
|
|
// to clean up then these handle can all be closed.
|
|
//
|
|
if (*phandle != INVALID_HANDLE_VALUE) {
|
|
|
|
//
|
|
// Check if we already created the table. If we have not
|
|
// then allocate space for table.
|
|
//
|
|
if (FFhandles == NULL) {
|
|
|
|
FFhandles = (PHANDLE)HeapAlloc(GetProcessHeap(), 0, 5 * sizeof(PHANDLE));
|
|
|
|
} else {
|
|
|
|
//
|
|
// Check if we have space to hold new handle entry
|
|
//
|
|
if (((FFhndlsaved + 1)* sizeof(PHANDLE)) > HeapSize(GetProcessHeap(), 0, FFhandles)) {
|
|
PVOID Temp = HeapReAlloc(GetProcessHeap(), 0, (void*)FFhandles, (FFhndlsaved+1)*sizeof(PHANDLE));
|
|
if (Temp == NULL) {
|
|
DosErr = GetLastError( );
|
|
FindClose( *phandle );
|
|
*phandle = INVALID_HANDLE_VALUE;
|
|
return FALSE;
|
|
}
|
|
FFhandles = Temp;
|
|
}
|
|
}
|
|
if (FFhandles != NULL) {
|
|
FFhandles[FFhndlsaved++] = *phandle;
|
|
}
|
|
|
|
rcode = TRUE;
|
|
}
|
|
|
|
if (!rcode) {
|
|
DosErr = GetLastError();
|
|
}
|
|
return(rcode);
|
|
}
|
|
|
|
|
|
BOOLEAN
|
|
FindFirstNt(
|
|
IN PTCHAR fspec,
|
|
IN PWIN32_FIND_DATA pffBuf,
|
|
OUT PHANDLE phandle
|
|
)
|
|
{
|
|
|
|
return(FindFirst(IsNtAttribMatch, fspec, 0, pffBuf, phandle));
|
|
|
|
}
|
|
BOOLEAN
|
|
ffirst(
|
|
PTCHAR fspec,
|
|
ULONG attr,
|
|
PWIN32_FIND_DATA pffBuf,
|
|
PHANDLE phandle
|
|
)
|
|
{
|
|
|
|
return(FindFirst(IsDosAttribMatch, fspec, attr, pffBuf, phandle));
|
|
|
|
}
|
|
|
|
|
|
/*** fnext - find next file/directory
|
|
*
|
|
* Purpose:
|
|
* This function search for the next qualified file or directory.
|
|
* ffirst should have been called first and the returned file handle
|
|
* should be passed into fnext.
|
|
|
|
* Args:
|
|
* handle: Find first handle
|
|
* attr: Attributes to qualify search
|
|
* ffbuf: Buffer to hold information on found file/directory
|
|
*
|
|
* Returns:
|
|
* TRUE: If match found
|
|
* FALSE: if not
|
|
* DosErr: Contains return code if FALSE function return
|
|
*/
|
|
|
|
BOOLEAN
|
|
FindNextNt (
|
|
IN PWIN32_FIND_DATA pffBuf,
|
|
IN HANDLE handle
|
|
) {
|
|
|
|
//
|
|
// attributes are ignored for this kind of call
|
|
//
|
|
return( FindNext( IsNtAttribMatch, pffBuf, 0, handle) );
|
|
}
|
|
|
|
BOOLEAN
|
|
fnext (
|
|
IN PWIN32_FIND_DATA pffBuf,
|
|
IN ULONG attr,
|
|
IN HANDLE handle
|
|
) {
|
|
|
|
return( FindNext( IsDosAttribMatch, pffBuf, attr, handle) );
|
|
}
|
|
|
|
BOOLEAN
|
|
FindNext (
|
|
IN BOOL(* fctAttribMatch) (PWIN32_FIND_DATA pffBuf, ULONG attr),
|
|
IN PWIN32_FIND_DATA pffBuf,
|
|
IN ULONG attr,
|
|
IN HANDLE handle
|
|
) {
|
|
|
|
//
|
|
// Loop through looking for a file that matching attributes
|
|
//
|
|
while (FindNextFile( handle, pffBuf )) {
|
|
if (fctAttribMatch( pffBuf, attr )) {
|
|
DosErr = 0;
|
|
return(TRUE);
|
|
}
|
|
}
|
|
|
|
DosErr = GetLastError();
|
|
return(FALSE);
|
|
}
|
|
|
|
int findclose(hn)
|
|
HANDLE hn;
|
|
{
|
|
|
|
unsigned cnt;
|
|
unsigned cnt2;
|
|
|
|
DEBUG((CTGRP, COLVL, "findclose: handle %lx",hn)) ;
|
|
// Locate handle in table
|
|
//
|
|
for (cnt = 0; (cnt < FFhndlsaved) && FFhandles[cnt] != hn ; cnt++ ) {
|
|
;
|
|
}
|
|
|
|
//
|
|
// Remove handle from table
|
|
//
|
|
DEBUG((CTGRP, COLVL, "\t found handle in table at %d",cnt)) ;
|
|
if (cnt < FFhndlsaved) {
|
|
for (cnt2 = cnt; cnt2 < (FFhndlsaved - 1) ; cnt2++) {
|
|
FFhandles[cnt2] = FFhandles[cnt2 + 1];
|
|
}
|
|
FFhndlsaved--;
|
|
}
|
|
|
|
//
|
|
// Close even if we couldn't find it in table
|
|
//
|
|
DEBUG((CTGRP, COLVL, "\t closing handle %lx ",hn)) ;
|
|
if (FindClose(hn)) /* Close even if we couldn't find it in table */
|
|
return(0);
|
|
else
|
|
DEBUG((CTGRP, COLVL, "\t Error closing handle %lx ",hn)) ;
|
|
return(GetLastError());
|
|
}
|