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/*
Unix SMB/CIFS implementation.
Filename utility functions.
Copyright (C) Tim Prouty 2009
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "smbd/smbd.h"
/**
* XXX: This is temporary and there should be no callers of this outside of
* this file once smb_filename is plumbed through all path based operations.
* The one legitimate caller currently is smb_fname_str_dbg(), which this
* could be made static for.
*/
NTSTATUS get_full_smb_filename(TALLOC_CTX *ctx,
const struct smb_filename *smb_fname,
char **full_name)
{
if (smb_fname->stream_name) {
/* stream_name must always be NULL if there is no stream. */
SMB_ASSERT(smb_fname->stream_name[0] != '\0');
*full_name = talloc_asprintf(ctx, "%s%s", smb_fname->base_name,
smb_fname->stream_name);
} else {
*full_name = talloc_strdup(ctx, smb_fname->base_name);
}
if (!*full_name) {
return NT_STATUS_NO_MEMORY;
}
return NT_STATUS_OK;
}
/**
* There are actually legitimate callers of this such as functions that
* enumerate streams using the SMB_VFS_STREAMINFO interface and then want to
* operate on each stream.
*/
NTSTATUS create_synthetic_smb_fname(TALLOC_CTX *ctx, const char *base_name,
const char *stream_name,
const SMB_STRUCT_STAT *psbuf,
struct smb_filename **smb_fname_out)
{
struct smb_filename smb_fname_loc;
ZERO_STRUCT(smb_fname_loc);
/* Setup the base_name/stream_name. */
smb_fname_loc.base_name = CONST_DISCARD(char *, base_name);
smb_fname_loc.stream_name = CONST_DISCARD(char *, stream_name);
/* Copy the psbuf if one was given. */
if (psbuf)
smb_fname_loc.st = *psbuf;
/* Let copy_smb_filename() do the heavy lifting. */
return copy_smb_filename(ctx, &smb_fname_loc, smb_fname_out);
}
/**
* XXX: This is temporary and there should be no callers of this once
* smb_filename is plumbed through all path based operations.
*/
NTSTATUS create_synthetic_smb_fname_split(TALLOC_CTX *ctx,
const char *fname,
const SMB_STRUCT_STAT *psbuf,
struct smb_filename **smb_fname_out)
{
NTSTATUS status;
const char *stream_name = NULL;
char *base_name = NULL;
if (!lp_posix_pathnames()) {
stream_name = strchr_m(fname, ':');
}
/* Setup the base_name/stream_name. */
if (stream_name) {
base_name = talloc_strndup(ctx, fname,
PTR_DIFF(stream_name, fname));
} else {
base_name = talloc_strdup(ctx, fname);
}
if (!base_name) {
return NT_STATUS_NO_MEMORY;
}
status = create_synthetic_smb_fname(ctx, base_name, stream_name, psbuf,
smb_fname_out);
TALLOC_FREE(base_name);
return status;
}
/**
* Return a string using the talloc_tos()
*/
const char *smb_fname_str_dbg(const struct smb_filename *smb_fname)
{
char *fname = NULL;
NTSTATUS status;
if (smb_fname == NULL) {
return "";
}
status = get_full_smb_filename(talloc_tos(), smb_fname, &fname);
if (!NT_STATUS_IS_OK(status)) {
return "";
}
return fname;
}
/**
* Return a debug string using the talloc_tos(). This can only be called from
* DEBUG() macros due to the debut_ctx().
*/
const char *fsp_str_dbg(const struct files_struct *fsp)
{
return smb_fname_str_dbg(fsp->fsp_name);
}
NTSTATUS copy_smb_filename(TALLOC_CTX *ctx,
const struct smb_filename *smb_fname_in,
struct smb_filename **smb_fname_out)
{
/* stream_name must always be NULL if there is no stream. */
if (smb_fname_in->stream_name) {
SMB_ASSERT(smb_fname_in->stream_name[0] != '\0');
}
*smb_fname_out = talloc_zero(ctx, struct smb_filename);
if (*smb_fname_out == NULL) {
return NT_STATUS_NO_MEMORY;
}
if (smb_fname_in->base_name) {
(*smb_fname_out)->base_name =
talloc_strdup(*smb_fname_out, smb_fname_in->base_name);
if (!(*smb_fname_out)->base_name)
goto no_mem_err;
}
if (smb_fname_in->stream_name) {
(*smb_fname_out)->stream_name =
talloc_strdup(*smb_fname_out, smb_fname_in->stream_name);
if (!(*smb_fname_out)->stream_name)
goto no_mem_err;
}
if (smb_fname_in->original_lcomp) {
(*smb_fname_out)->original_lcomp =
talloc_strdup(*smb_fname_out, smb_fname_in->original_lcomp);
if (!(*smb_fname_out)->original_lcomp)
goto no_mem_err;
}
(*smb_fname_out)->st = smb_fname_in->st;
return NT_STATUS_OK;
no_mem_err:
TALLOC_FREE(*smb_fname_out);
return NT_STATUS_NO_MEMORY;
}
/****************************************************************************
Simple check to determine if the filename is a stream.
***************************************************************************/
bool is_ntfs_stream_smb_fname(const struct smb_filename *smb_fname)
{
/* stream_name must always be NULL if there is no stream. */
if (smb_fname->stream_name) {
SMB_ASSERT(smb_fname->stream_name[0] != '\0');
}
if (lp_posix_pathnames()) {
return false;
}
return smb_fname->stream_name != NULL;
}
/****************************************************************************
Returns true if the filename's stream == "::$DATA"
***************************************************************************/
bool is_ntfs_default_stream_smb_fname(const struct smb_filename *smb_fname)
{
if (!is_ntfs_stream_smb_fname(smb_fname)) {
return false;
}
return StrCaseCmp(smb_fname->stream_name, "::$DATA") == 0;
}
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