UNIX Extensions: Difference between revisions
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#define SMB_QUERY_POSIX_WHOAMI 0x202 |
#define SMB_QUERY_POSIX_WHOAMI 0x202 |
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Revision as of 22:08, 27 February 2007
See http://samba.org/samba/CIFS_POSIX_extensions.html
All Unix extensions are TRANSACT2 commands in the range from 0x200 to 0x2FF (inclusive).
Negotiating Capabilities
Capability | Value |
---|---|
CIFS_UNIX_FCNLT_LOCKS_CAP | 0x01 |
CIFS_UNIX_POSIX_ACLS_CAP | 0x02 |
CIFS_UNIX_XATTR_CAP | 0x04 |
CIFS_UNIX_EXATTR_CAP | 0x08 |
CIFS_UNIX_POSIX_PATH_OPERATIONS_CAP | 0x20 |
Posix Open
The server specifies it can serve these by returning CIFS_UNIX_POSIX_PATH_OPERATIONS_CAP in the reply to a trans2 qfsinfo (TRANSACT2_QFSINFO 0x03) info level SMB_QUERY_CIFS_UNIX_INFO (0x200) call. All values are little endian.
For open, call TRANSACT2_SETPATHINFO (0x06) call info level :
SMB_POSIX_PATH_OPEN 0x209
The request data block should be 14 bytes consisting of the following :
Size | Offset | Value |
---|---|---|
4 bytes | 0 | Flags field (same as smb_ntcreate_flags in SMBNTCreateX to request oplocks) |
4 bytes | 4 | POSIX open flags (see below) |
4 bytes | 8 | POSIX mode_t (see below) |
2 bytes | 12 | Reply info level requested (see below) |
Encodings are as follows :
POSIX open flags | Value |
---|---|
SMB_O_RDONLY | 0x1 |
SMB_O_WRONLY | 0x2 |
SMB_O_RDWR | 0x4 |
SMB_O_CREAT | 0x10 |
SMB_O_EXCL | 0x20 |
SMB_O_TRUNC | 0x40 |
SMB_O_APPEND | 0x80 |
SMB_O_SYNC | 0x100 |
SMB_O_DIRECTORY | 0x200 |
SMB_O_NOFOLLOW | 0x400 |
SMB_O_DIRECT | 0x800 |
SMB WHOAMI
The SMBWhoami extension is intended to be a lightweight method for a Unix client to be able to display sensible file ownership information.
SMBWhoami is performed by requesting a TRANS2_QFSINFO with an info level of SMB_QUERY_POSIX_WHOAMI. There are no parameters passed. The vuid field is implicitly used.
- define SMB_QUERY_POSIX_WHOAMI 0x202
SMB_QUERY_POSIX_WHOAMI | 0x202 |
+ SMB_WHOAMI_GUEST = 0x1 /* Logged in as (or squashed to) guest */
+ Returns:
+ 4 bytes unsigned - mapping flags (smb_whoami_flags)
+ 4 bytes unsigned - flags mask
+
+ 8 bytes unsigned - primary UID
+ 8 bytes unsigned - primary GID
+ 4 bytes unsigned - number of supplementary GIDs
+ 4 bytes unsigned - number of SIDs
+ 4 bytes unsigned - SID list byte count
+ 4 bytes - pad / reserved (must be zero)
+
+ 8 bytes unsigned[] - list of GIDs (may be empty)
+ DOM_SID[] - list of SIDs (may be empty)