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authorJeremy Allison <jra@samba.org>2000-12-07 05:38:01 +0000
committerJeremy Allison <jra@samba.org>2000-12-07 05:38:01 +0000
commit423227d7ca87a6a4b9412e9ecbc3d6dd073818b1 (patch)
treee8e68c7bc2b7cee20b986d0510911647e735d937 /source3/smbd
parent70922b9bbe412dc43397ecfd3feeb01169ed0b96 (diff)
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Working code to read POSIX ACLs on a Linux system using the bestbits
ACL patch from http://acl.bestbits.at/. configure support needs more work (just assumes correct headers at the moment). ACL writing needs adding. Jeremy. (This used to be commit 6ae63e502e6adf3666a34aa87860c74e106fdb84)
Diffstat (limited to 'source3/smbd')
-rw-r--r--source3/smbd/posix_acls.c99
1 files changed, 61 insertions, 38 deletions
diff --git a/source3/smbd/posix_acls.c b/source3/smbd/posix_acls.c
index 4f483c8f53..6636279024 100644
--- a/source3/smbd/posix_acls.c
+++ b/source3/smbd/posix_acls.c
@@ -25,7 +25,7 @@
typedef struct canon_ace {
struct canon_ace *next, *prev;
SMB_ACL_TAG_T type;
- SMB_ACL_PERMSET_T perms;
+ mode_t perms;
DOM_SID sid;
} canon_ace;
@@ -50,9 +50,9 @@ static SEC_ACCESS map_canon_ace_perms(int *pacl_type, DOM_SID *powner_sid, canon
*pacl_type = SEC_ACE_TYPE_ACCESS_ALLOWED;
- if((ace->perms & (SMB_ACL_READ|SMB_ACL_WRITE|SMB_ACL_EXECUTE)) == (SMB_ACL_READ|SMB_ACL_WRITE|SMB_ACL_EXECUTE)) {
- nt_mask = UNIX_ACCESS_RWX;
- } else if((ace->perms & (SMB_ACL_READ|SMB_ACL_WRITE|SMB_ACL_EXECUTE)) == 0) {
+ if((ace->perms & (S_IRWXU|S_IWUSR|S_IXUSR)) == (S_IRWXU|S_IWUSR|S_IXUSR)) {
+ nt_mask = UNIX_ACCESS_RWX;
+ } else if((ace->perms & (S_IRWXU|S_IWUSR|S_IXUSR)) == 0) {
/*
* Here we differentiate between the owner and any other user.
*/
@@ -63,10 +63,14 @@ static SEC_ACCESS map_canon_ace_perms(int *pacl_type, DOM_SID *powner_sid, canon
nt_mask = 0;
}
} else {
- nt_mask |= (ace->perms & SMB_ACL_READ) ? UNIX_ACCESS_R : 0;
- nt_mask |= (ace->perms & SMB_ACL_WRITE) ? UNIX_ACCESS_W : 0;
- nt_mask |= (ace->perms & SMB_ACL_EXECUTE) ? UNIX_ACCESS_X : 0;
+ nt_mask |= ((ace->perms & S_IRWXU) ? UNIX_ACCESS_R : 0 );
+ nt_mask |= ((ace->perms & S_IWUSR) ? UNIX_ACCESS_W : 0 );
+ nt_mask |= ((ace->perms & S_IXUSR) ? UNIX_ACCESS_X : 0 );
}
+
+ DEBUG(10,("map_canon_ace_perms: Mapped (UNIX) %x to (NT) %x\n",
+ (unsigned int)ace->perms, (unsigned int)nt_mask ));
+
init_sec_access(&sa,nt_mask);
return sa;
}
@@ -305,13 +309,31 @@ static BOOL unpack_nt_permissions(SMB_STRUCT_STAT *psbuf, uid_t *puser, gid_t *p
Map generic UNIX permissions to POSIX ACL perms.
****************************************************************************/
-static SMB_ACL_PERMSET_T unix_perms_to_acl_perms(mode_t mode, int r_mask, int w_mask, int x_mask)
+static mode_t convert_permset_to_mode_t(SMB_ACL_PERMSET_T permset)
+{
+ mode_t ret = 0;
+
+ ret |= (sys_acl_get_perm(permset, SMB_ACL_READ) ? S_IRUSR : 0);
+ ret |= (sys_acl_get_perm(permset, SMB_ACL_WRITE) ? S_IWUSR : 0);
+ ret |= (sys_acl_get_perm(permset, SMB_ACL_EXECUTE) ? S_IXUSR : 0);
+
+ return ret;
+}
+
+/****************************************************************************
+ Map generic UNIX permissions to POSIX ACL perms.
+****************************************************************************/
+
+static mode_t unix_perms_to_acl_perms(mode_t mode, int r_mask, int w_mask, int x_mask)
{
- SMB_ACL_PERMSET_T ret = 0;
+ mode_t ret = 0;
- ret |= (mode & r_mask) ? SMB_ACL_READ : 0;
- ret |= (mode & w_mask) ? SMB_ACL_WRITE : 0;
- ret |= (mode & x_mask) ? SMB_ACL_EXECUTE : 0;
+ if (mode & r_mask)
+ ret |= S_IRUSR;
+ if (mode & w_mask)
+ ret |= S_IWUSR;
+ if (mode & x_mask)
+ ret |= S_IXUSR;
return ret;
}
@@ -380,7 +402,7 @@ static canon_ace *unix_canonicalise_acl(files_struct *fsp, SMB_STRUCT_STAT *psbu
group_ace->type = SMB_ACL_GROUP_OBJ;
group_ace->sid = *pgroup;
- other_ace->type = SMB_ACL_OTHER_OBJ;
+ other_ace->type = SMB_ACL_OTHER;
other_ace->sid = global_sid_World;
if (!fsp->is_directory) {
@@ -418,7 +440,7 @@ static canon_ace *unix_canonicalise_acl(files_struct *fsp, SMB_STRUCT_STAT *psbu
static canon_ace *canonicalise_acl( SMB_ACL_T posix_acl, SMB_STRUCT_STAT *psbuf)
{
extern DOM_SID global_sid_World;
- SMB_ACL_PERMSET_T acl_mask = (SMB_ACL_READ|SMB_ACL_WRITE|SMB_ACL_EXECUTE);
+ mode_t acl_mask = (S_IRUSR|S_IWUSR|S_IXUSR);
canon_ace *list_head = NULL;
canon_ace *ace = NULL;
canon_ace *next_ace = NULL;
@@ -472,16 +494,16 @@ static canon_ace *canonicalise_acl( SMB_ACL_T posix_acl, SMB_STRUCT_STAT *psbuf)
break;
}
case SMB_ACL_MASK:
- acl_mask = permset;
+ acl_mask = convert_permset_to_mode_t(permset);
continue; /* Don't count the mask as an entry. */
- case SMB_ACL_OTHER_OBJ:
+ case SMB_ACL_OTHER:
/* Use the Everyone SID */
sid = global_sid_World;
break;
default:
DEBUG(0,("canonicalise_acl: Unknown tagtype %u\n", (unsigned int)tagtype));
continue;
- }
+ }
/*
* Add this entry to the list.
@@ -492,7 +514,7 @@ static canon_ace *canonicalise_acl( SMB_ACL_T posix_acl, SMB_STRUCT_STAT *psbuf)
ZERO_STRUCTP(ace);
ace->type = tagtype;
- ace->perms = permset;
+ ace->perms = convert_permset_to_mode_t(permset);
ace->sid = sid;
DLIST_ADD(list_head, ace);
@@ -500,30 +522,27 @@ static canon_ace *canonicalise_acl( SMB_ACL_T posix_acl, SMB_STRUCT_STAT *psbuf)
/*
* Now go through the list, masking the permissions with the
- * acl_mask. If the permissions are 0 and the type is ACL_USER
- * or ACL_GROUP then it's a DENY entry and should be listed
- * first. If the permissions are 0 and the type is ACL_USER_OBJ,
- * ACL_GROUP_OBJ or ACL_OTHER_OBJ then remove the entry as they
- * can never apply.
+ * acl_mask. If the permissions are 0 it should be listed
+ * first.
*/
for ( ace = list_head; ace; ace = next_ace) {
next_ace = ace->next;
- ace->perms &= acl_mask;
-
- if (ace->perms == 0) {
- switch (ace->type) {
- case SMB_ACL_USER_OBJ:
- case SMB_ACL_GROUP_OBJ:
- case SMB_ACL_OTHER_OBJ:
- DLIST_REMOVE(list_head, ace);
- break;
- case SMB_ACL_USER:
- case SMB_ACL_GROUP:
- DLIST_PROMOTE(list_head, ace);
- break;
- }
- }
+
+ /* Masks are only applied to entries other than USER_OBJ and OTHER. */
+ if (ace->type != SMB_ACL_OTHER && ace->type != SMB_ACL_USER_OBJ)
+ ace->perms &= acl_mask;
+
+ if (ace->perms == 0)
+ DLIST_PROMOTE(list_head, ace);
+ }
+
+ if( DEBUGLVL( 10 ) ) {
+ char *acl_text = sys_acl_to_text( posix_acl, NULL);
+
+ dbgtext("canonicalize_acl: processed acl %s\n", acl_text == NULL ? "NULL" : acl_text );
+ if (acl_text)
+ sys_acl_free(acl_text);
}
return list_head;
@@ -590,6 +609,10 @@ size_t get_nt_acl(files_struct *fsp, SEC_DESC **ppdesc)
posix_acl = sys_acl_get_fd(fsp->fd);
}
+ DEBUG(5,("get_nt_acl : file ACL %s, directory ACL %s\n",
+ posix_acl ? "present" : "absent",
+ dir_acl ? "present" : "absent" ));
+
/*
* Get the owner, group and world SIDs.
*/