diff options
Diffstat (limited to 'source3/smbd/filename_util.c')
| -rw-r--r-- | source3/smbd/filename_util.c | 206 |
1 files changed, 206 insertions, 0 deletions
diff --git a/source3/smbd/filename_util.c b/source3/smbd/filename_util.c new file mode 100644 index 0000000000..867709a373 --- /dev/null +++ b/source3/smbd/filename_util.c @@ -0,0 +1,206 @@ +/* + 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 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 debug_ctx() + */ +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(debug_ctx(), smb_fname, &fname); + if (!NT_STATUS_IS_OK(status)) { + return ""; + } + return fname; +} + +/** + * Return a debug string using the debug_ctx(). 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; +} + +/**************************************************************************** + 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; +} |