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b91e257f56
Right now the only user is the user-space symlink following in smbd. We will use it in libsmb as well to correctly handle STOPPED_ON_SYMLINK. When trying to upstream that code I found the previous_slash function incredibly hard to understand. This new routine makes copy of "const char *_name_in", so that we can replace previous_slash with a simple strrchr_m. If that's too slow (which I doubt, this is "only" chasing symlinks) we can always do something smarter again. Signed-off-by: Volker Lendecke <vl@samba.org> Reviewed-by: Andreas Schneider <asn@samba.org>
91 lines
2.3 KiB
C
91 lines
2.3 KiB
C
/*
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* Unix SMB/CIFS implementation.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __LIBCLI_SMB_REPARSE_H__
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#define __LIBCLI_SMB_REPARSE_H__
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#include <talloc.h>
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#include "replace.h"
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#include "libcli/util/ntstatus.h"
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struct symlink_reparse_struct {
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uint16_t unparsed_path_length; /* reserved for the reparse point */
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char *substitute_name;
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char *print_name;
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uint32_t flags;
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};
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struct nfs_reparse_data_buffer {
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uint64_t type;
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union {
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char *lnk_target; /* NFS_SPECFILE_LNK */
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struct {
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uint32_t major;
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uint32_t minor;
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} dev; /* NFS_SPECFILE_[CHR|BLK] */
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/* NFS_SPECFILE_[FIFO|SOCK] have no data */
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} data;
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};
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struct reparse_data_buffer {
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uint32_t tag;
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union {
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/* IO_REPARSE_TAG_NFS */
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struct nfs_reparse_data_buffer nfs;
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/* IO_REPARSE_TAG_SYMLINK */
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struct symlink_reparse_struct lnk;
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/* Unknown reparse tag */
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struct {
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uint16_t length;
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uint16_t reserved;
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uint8_t *data;
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} raw;
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} parsed;
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};
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NTSTATUS reparse_buffer_check(const uint8_t *in_data,
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size_t in_len,
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uint32_t *reparse_tag,
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const uint8_t **_reparse_data,
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size_t *_reparse_data_length);
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NTSTATUS reparse_data_buffer_parse(TALLOC_CTX *mem_ctx,
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struct reparse_data_buffer *dst,
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const uint8_t *buf,
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size_t buflen);
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char *reparse_data_buffer_str(TALLOC_CTX *mem_ctx,
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const struct reparse_data_buffer *dst);
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ssize_t reparse_data_buffer_marshall(const struct reparse_data_buffer *src,
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uint8_t *buf,
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size_t buflen);
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int symlink_target_path(TALLOC_CTX *ctx,
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const char *_name_in,
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size_t num_unparsed,
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const char *substitute,
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bool relative,
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char separator,
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char **_target);
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#endif
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