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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"
/**
* 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 vfs_streaminfo interface and then want to
* operate on each stream.
*/
struct smb_filename *synthetic_smb_fname(TALLOC_CTX *mem_ctx,
const char *base_name,
const char *stream_name,
const SMB_STRUCT_STAT *psbuf)
{
struct smb_filename smb_fname_loc = { 0, };
/* Setup the base_name/stream_name. */
smb_fname_loc.base_name = discard_const_p(char, base_name);
smb_fname_loc.stream_name = discard_const_p(char, stream_name);
/* Copy the psbuf if one was given. */
if (psbuf)
smb_fname_loc.st = *psbuf;
/* Let cp_smb_filename() do the heavy lifting. */
return cp_smb_filename(mem_ctx, &smb_fname_loc);
}
/**
* XXX: This is temporary and there should be no callers of this once
* smb_filename is plumbed through all path based operations.
*/
struct smb_filename *synthetic_smb_fname_split(TALLOC_CTX *ctx,
const char *fname,
const SMB_STRUCT_STAT *psbuf)
{
const char *stream_name = NULL;
char *base_name = NULL;
struct smb_filename *ret;
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 NULL;
}
ret = synthetic_smb_fname(ctx, base_name, stream_name, psbuf);
TALLOC_FREE(base_name);
return ret;
}
/**
* 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 of the path name of an fsp using the talloc_tos().
*/
const char *fsp_str_dbg(const struct files_struct *fsp)
{
return smb_fname_str_dbg(fsp->fsp_name);
}
/**
* Create a debug string for the fnum of an fsp.
*
* This is allocated to talloc_tos() or a string constant
* in certain corner cases. The returned string should
* hence not be free'd directly but only via the talloc stack.
*/
const char *fsp_fnum_dbg(const struct files_struct *fsp)
{
char *str;
if (fsp == NULL) {
return "fnum [fsp is NULL]";
}
if (fsp->fnum == FNUM_FIELD_INVALID) {
return "fnum [invalid value]";
}
str = talloc_asprintf(talloc_tos(), "fnum %llu",
(unsigned long long)fsp->fnum);
if (str == NULL) {
DEBUG(1, ("%s: talloc_asprintf failed\n", __FUNCTION__));
return "fnum [talloc failed!]";
}
return str;
}
struct smb_filename *cp_smb_filename(TALLOC_CTX *mem_ctx,
const struct smb_filename *in)
{
struct smb_filename *out;
/* stream_name must always be NULL if there is no stream. */
if (in->stream_name) {
SMB_ASSERT(in->stream_name[0] != '\0');
}
out = talloc_zero(mem_ctx, struct smb_filename);
if (out == NULL) {
return NULL;
}
if (in->base_name != NULL) {
out->base_name = talloc_strdup(out, in->base_name);
if (out->base_name == NULL) {
goto fail;
}
}
if (in->stream_name != NULL) {
out->stream_name = talloc_strdup(out, in->stream_name);
if (out->stream_name == NULL) {
goto fail;
}
}
if (in->original_lcomp != NULL) {
out->original_lcomp = talloc_strdup(out, in->original_lcomp);
if (out->original_lcomp == NULL) {
goto fail;
}
}
out->st = in->st;
return out;
fail:
TALLOC_FREE(out);
return NULL;
}
/****************************************************************************
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 == "::$DATA"
***************************************************************************/
bool is_ntfs_default_stream_smb_fname(const struct smb_filename *smb_fname)
{
if (!is_ntfs_stream_smb_fname(smb_fname)) {
return false;
}
return strcasecmp_m(smb_fname->stream_name, "::$DATA") == 0;
}
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