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ntdll: Move the directory lookup part of wine_nt_to_unix_file_name to a separate helper.

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This commit is contained in:
Alexandre Julliard 2009-12-01 16:30:52 +01:00
parent 77d58529f5
commit a420a207e3
1 changed files with 122 additions and 116 deletions
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238
dlls/ntdll/directory.c
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@ -2211,6 +2211,120 @@ static inline int get_dos_prefix_len( const UNICODE_STRING *name )
}
/******************************************************************************
* lookup_unix_name
*
* Helper for nt_to_unix_file_name
*/
static NTSTATUS lookup_unix_name( const WCHAR *name, int name_len, char **buffer, int unix_len, int pos,
UINT disposition, BOOLEAN check_case )
{
NTSTATUS status;
int ret, used_default, len;
struct stat st;
char *unix_name = *buffer;
const BOOL redirect = nb_redirects && ntdll_get_thread_data()->wow64_redir;
/* try a shortcut first */
ret = ntdll_wcstoumbs( 0, name, name_len, unix_name + pos, unix_len - pos - 1,
NULL, &used_default );
while (name_len && IS_SEPARATOR(*name))
{
name++;
name_len--;
}
if (ret > 0 && !used_default) /* if we used the default char the name didn't convert properly */
{
char *p;
unix_name[pos + ret] = 0;
for (p = unix_name + pos ; *p; p++) if (*p == '\\') *p = '/';
if ((!redirect || !strstr( unix_name, "/windows/")) && !stat( unix_name, &st ))
{
/* creation fails with STATUS_ACCESS_DENIED for the root of the drive */
if (disposition == FILE_CREATE)
return name_len ? STATUS_OBJECT_NAME_COLLISION : STATUS_ACCESS_DENIED;
return STATUS_SUCCESS;
}
}
if (!name_len) /* empty name -> drive root doesn't exist */
return STATUS_OBJECT_PATH_NOT_FOUND;
if (check_case && !redirect && (disposition == FILE_OPEN || disposition == FILE_OVERWRITE))
return STATUS_OBJECT_NAME_NOT_FOUND;
/* now do it component by component */
while (name_len)
{
const WCHAR *end, *next;
int is_win_dir = 0;
end = name;
while (end < name + name_len && !IS_SEPARATOR(*end)) end++;
next = end;
while (next < name + name_len && IS_SEPARATOR(*next)) next++;
name_len -= next - name;
/* grow the buffer if needed */
if (unix_len - pos < MAX_DIR_ENTRY_LEN + 2)
{
char *new_name;
unix_len += 2 * MAX_DIR_ENTRY_LEN;
if (!(new_name = RtlReAllocateHeap( GetProcessHeap(), 0, unix_name, unix_len )))
return STATUS_NO_MEMORY;
unix_name = *buffer = new_name;
}
status = find_file_in_dir( unix_name, pos, name, end - name,
check_case, redirect ? &is_win_dir : NULL );
/* if this is the last element, not finding it is not necessarily fatal */
if (!name_len)
{
if (status == STATUS_OBJECT_PATH_NOT_FOUND)
{
status = STATUS_OBJECT_NAME_NOT_FOUND;
if (disposition != FILE_OPEN && disposition != FILE_OVERWRITE)
{
ret = ntdll_wcstoumbs( 0, name, end - name, unix_name + pos + 1,
MAX_DIR_ENTRY_LEN, NULL, &used_default );
if (ret > 0 && !used_default)
{
unix_name[pos] = '/';
unix_name[pos + 1 + ret] = 0;
status = STATUS_NO_SUCH_FILE;
break;
}
}
}
else if (status == STATUS_SUCCESS && disposition == FILE_CREATE)
{
status = STATUS_OBJECT_NAME_COLLISION;
}
}
if (status != STATUS_SUCCESS) break;
pos += strlen( unix_name + pos );
name = next;
if (is_win_dir && (len = get_redirect_path( unix_name, pos, name, name_len, check_case )))
{
name += len;
name_len -= len;
pos += strlen( unix_name + pos );
TRACE( "redirecting -> %s + %s\n", debugstr_a(unix_name), debugstr_w(name) );
}
}
return status;
}
/******************************************************************************
* wine_nt_to_unix_file_name (NTDLL.@) Not a Windows API
*
@ -2234,7 +2348,6 @@ NTSTATUS CDECL wine_nt_to_unix_file_name( const UNICODE_STRING *nameW, ANSI_STRI
int pos, ret, name_len, unix_len, prefix_len, used_default;
WCHAR prefix[MAX_DIR_ENTRY_LEN];
BOOLEAN is_unix = FALSE;
const BOOL redirect = nb_redirects && ntdll_get_thread_data()->wow64_redir;
name = nameW->Buffer;
name_len = nameW->Length / sizeof(WCHAR);
@ -2315,126 +2428,19 @@ NTSTATUS CDECL wine_nt_to_unix_file_name( const UNICODE_STRING *nameW, ANSI_STRI
}
}
/* try a shortcut first */
ret = ntdll_wcstoumbs( 0, name, name_len, unix_name + pos, unix_len - pos - 1,
NULL, &used_default );
while (name_len && IS_SEPARATOR(*name))
status = lookup_unix_name( name, name_len, &unix_name, unix_len, pos, disposition, check_case );
if (status == STATUS_SUCCESS || status == STATUS_NO_SUCH_FILE)
{
name++;
name_len--;
TRACE( "%s -> %s\n", debugstr_us(nameW), debugstr_a(unix_name) );
unix_name_ret->Buffer = unix_name;
unix_name_ret->Length = strlen(unix_name);
unix_name_ret->MaximumLength = unix_len;
}
if (ret > 0 && !used_default) /* if we used the default char the name didn't convert properly */
{
char *p;
unix_name[pos + ret] = 0;
for (p = unix_name + pos ; *p; p++) if (*p == '\\') *p = '/';
if ((!redirect || !strstr( unix_name, "/windows/")) && !stat( unix_name, &st ))
{
/* creation fails with STATUS_ACCESS_DENIED for the root of the drive */
if (disposition == FILE_CREATE)
{
RtlFreeHeap( GetProcessHeap(), 0, unix_name );
return name_len ? STATUS_OBJECT_NAME_COLLISION : STATUS_ACCESS_DENIED;
}
goto done;
}
}
if (!name_len) /* empty name -> drive root doesn't exist */
else
{
TRACE( "%s not found in %s\n", debugstr_w(name), unix_name );
RtlFreeHeap( GetProcessHeap(), 0, unix_name );
return STATUS_OBJECT_PATH_NOT_FOUND;
}
if (check_case && !redirect && (disposition == FILE_OPEN || disposition == FILE_OVERWRITE))
{
RtlFreeHeap( GetProcessHeap(), 0, unix_name );
return STATUS_OBJECT_NAME_NOT_FOUND;
}
/* now do it component by component */
while (name_len)
{
const WCHAR *end, *next;
int is_win_dir = 0;
end = name;
while (end < name + name_len && !IS_SEPARATOR(*end)) end++;
next = end;
while (next < name + name_len && IS_SEPARATOR(*next)) next++;
name_len -= next - name;
/* grow the buffer if needed */
if (unix_len - pos < MAX_DIR_ENTRY_LEN + 2)
{
char *new_name;
unix_len += 2 * MAX_DIR_ENTRY_LEN;
if (!(new_name = RtlReAllocateHeap( GetProcessHeap(), 0, unix_name, unix_len )))
{
RtlFreeHeap( GetProcessHeap(), 0, unix_name );
return STATUS_NO_MEMORY;
}
unix_name = new_name;
}
status = find_file_in_dir( unix_name, pos, name, end - name,
check_case, redirect ? &is_win_dir : NULL );
/* if this is the last element, not finding it is not necessarily fatal */
if (!name_len)
{
if (status == STATUS_OBJECT_PATH_NOT_FOUND)
{
status = STATUS_OBJECT_NAME_NOT_FOUND;
if (disposition != FILE_OPEN && disposition != FILE_OVERWRITE)
{
ret = ntdll_wcstoumbs( 0, name, end - name, unix_name + pos + 1,
MAX_DIR_ENTRY_LEN, NULL, &used_default );
if (ret > 0 && !used_default)
{
unix_name[pos] = '/';
unix_name[pos + 1 + ret] = 0;
status = STATUS_NO_SUCH_FILE;
break;
}
}
}
else if (status == STATUS_SUCCESS && disposition == FILE_CREATE)
{
status = STATUS_OBJECT_NAME_COLLISION;
}
}
if (status != STATUS_SUCCESS)
{
/* couldn't find it at all, fail */
TRACE( "%s not found in %s\n", debugstr_w(name), unix_name );
RtlFreeHeap( GetProcessHeap(), 0, unix_name );
return status;
}
pos += strlen( unix_name + pos );
name = next;
if (is_win_dir && (prefix_len = get_redirect_path( unix_name, pos, name, name_len, check_case )))
{
name += prefix_len;
name_len -= prefix_len;
pos += strlen( unix_name + pos );
TRACE( "redirecting %s -> %s + %s\n",
debugstr_us(nameW), debugstr_a(unix_name), debugstr_w(name) );
}
}
done:
TRACE( "%s -> %s\n", debugstr_us(nameW), debugstr_a(unix_name) );
unix_name_ret->Buffer = unix_name;
unix_name_ret->Length = strlen(unix_name);
unix_name_ret->MaximumLength = unix_len;
return status;
}