r11236: Implement user rename for smbpasswd and ldap backends. Some cleanup on

tdb as well to make naming consistent.

4 files changed, 130 insertions, 4 deletions

diff --git a/source/passdb/pdb_ldap.c b/source/passdb/pdb_ldap.c
index ea21a03b516..92ef5133258 100644
--- a/source/passdb/pdb_ldap.c
+++ b/source/passdb/pdb_ldap.c
@@ -1870,6 +1870,52 @@ static NTSTATUS ldapsam_update_sam_account(struct pdb_methods *my_methods, SAM_A
 	return NT_STATUS_OK;
 }
 
+/***************************************************************************
+ Renames a SAM_ACCOUNT
+ - The "rename user script" has full responsibility for changing everything
+***************************************************************************/
+
+static NTSTATUS ldapsam_rename_sam_account(struct pdb_methods *my_methods,
+					   SAM_ACCOUNT *old_acct, 
+					   const char *newname)
+{
+	const char *oldname;
+	int rc;
+	pstring rename_script;
+
+	if (!old_acct) {
+		DEBUG(0, ("ldapsam_rename_sam_account: old_acct was NULL!\n"));
+		return NT_STATUS_INVALID_PARAMETER;
+	}
+	if (!newname) {
+		DEBUG(0, ("ldapsam_rename_sam_account: newname was NULL!\n"));
+		return NT_STATUS_INVALID_PARAMETER;
+	}
+		
+	oldname = pdb_get_username(old_acct);
+
+        /* rename the posix user */
+        pstrcpy(rename_script, lp_renameuser_script());
+
+	if (!(*rename_script))
+		return NT_STATUS_ACCESS_DENIED;
+
+	DEBUG (3, ("ldapsam_rename_sam_account: Renaming user %s to %s.\n", 
+		   oldname, newname));
+
+	pstring_sub(rename_script, "%unew", newname);
+	pstring_sub(rename_script, "%uold", oldname);
+	rc = smbrun(rename_script, NULL);
+
+	DEBUG(rc ? 0 : 3,("Running the command `%s' gave %d\n", 
+			  rename_script, rc));
+
+	if (rc)
+		return NT_STATUS_UNSUCCESSFUL;
+
+	return NT_STATUS_OK;
+}
+
 /**********************************************************************
  Helper function to determine for update_sam_account whether
  we need LDAP modification.
@@ -4203,6 +4249,7 @@ static NTSTATUS pdb_init_ldapsam_common(PDB_CONTEXT *pdb_context, PDB_METHODS **
 	(*pdb_method)->add_sam_account = ldapsam_add_sam_account;
 	(*pdb_method)->update_sam_account = ldapsam_update_sam_account;
 	(*pdb_method)->delete_sam_account = ldapsam_delete_sam_account;
+	(*pdb_method)->rename_sam_account = ldapsam_rename_sam_account;
 
 	(*pdb_method)->getgrsid = ldapsam_getgrsid;
 	(*pdb_method)->getgrgid = ldapsam_getgrgid;
diff --git a/source/passdb/pdb_smbpasswd.c b/source/passdb/pdb_smbpasswd.c
index 6eb4305409a..5fca706a838 100644
--- a/source/passdb/pdb_smbpasswd.c
+++ b/source/passdb/pdb_smbpasswd.c
@@ -1477,6 +1477,62 @@ static NTSTATUS smbpasswd_delete_sam_account (struct pdb_methods *my_methods, SA
 	return NT_STATUS_UNSUCCESSFUL;
 }
 
+static NTSTATUS smbpasswd_rename_sam_account (struct pdb_methods *my_methods, 
+					      SAM_ACCOUNT *old_acct,
+					      const char *newname)
+{
+	struct smbpasswd_privates *smbpasswd_state = (struct smbpasswd_privates*)my_methods->private_data;
+	pstring rename_script;
+	SAM_ACCOUNT *new_acct = NULL;
+	BOOL interim_account = False;
+	NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
+
+	if (!*(lp_renameuser_script()))
+		goto done;
+
+	if (!pdb_copy_sam_account(old_acct, &new_acct) ||
+	    !pdb_set_username(new_acct, newname, PDB_CHANGED))
+		goto done;
+
+	ret = smbpasswd_add_sam_account(my_methods, new_acct);
+	if (!NT_STATUS_IS_OK(ret))
+		goto done;
+
+	interim_account = True;
+
+	/* rename the posix user */
+	pstrcpy(rename_script, lp_renameuser_script());
+
+	if (*rename_script) {
+	        int rename_ret;
+
+		pstring_sub(rename_script, "%unew", newname);
+		pstring_sub(rename_script, "%uold", 
+			    pdb_get_username(old_acct));
+		rename_ret = smbrun(rename_script, NULL);
+
+		DEBUG(rename_ret ? 0 : 3,("Running the command `%s' gave %d\n", rename_script, rename_ret));
+
+		if (rename_ret) 
+			goto done; 
+        } else {
+		goto done;
+	}
+
+	smbpasswd_delete_sam_account(my_methods, old_acct);
+	interim_account = False;
+
+done:	
+	/* cleanup */
+	if (interim_account)
+		smbpasswd_delete_sam_account(my_methods, new_acct);
+
+	if (new_acct)
+		pdb_free_sam(&new_acct);
+	
+	return (ret);	
+}
+
 static void free_private_data(void **vp) 
 {
 	struct smbpasswd_privates **privates = (struct smbpasswd_privates**)vp;
@@ -1506,6 +1562,7 @@ static NTSTATUS pdb_init_smbpasswd(PDB_CONTEXT *pdb_context, PDB_METHODS **pdb_m
 	(*pdb_method)->add_sam_account = smbpasswd_add_sam_account;
 	(*pdb_method)->update_sam_account = smbpasswd_update_sam_account;
 	(*pdb_method)->delete_sam_account = smbpasswd_delete_sam_account;
+	(*pdb_method)->rename_sam_account = smbpasswd_rename_sam_account;
 
 	/* Setup private data and free function */
 
diff --git a/source/passdb/pdb_tdb.c b/source/passdb/pdb_tdb.c
index f04c82a5b15..8bf9b1b2828 100644
--- a/source/passdb/pdb_tdb.c
+++ b/source/passdb/pdb_tdb.c
@@ -775,7 +775,8 @@ static NTSTATUS tdbsam_add_sam_account (struct pdb_methods *my_methods, SAM_ACCO
  - unlock the new user record
 ***************************************************************************/
 static NTSTATUS tdbsam_rename_sam_account(struct pdb_methods *my_methods,
-					  SAM_ACCOUNT *oldname, const char *newname)
+					  SAM_ACCOUNT *old_acct, 
+					  const char *newname)
 {
 	struct tdbsam_privates *tdb_state = 
 		(struct tdbsam_privates *)my_methods->private_data;
@@ -788,7 +789,7 @@ static NTSTATUS tdbsam_rename_sam_account(struct pdb_methods *my_methods,
 	if (!*(lp_renameuser_script()))
 		goto done;
 
-	if (!pdb_copy_sam_account(oldname, &new_acct) ||
+	if (!pdb_copy_sam_account(old_acct, &new_acct) ||
 	    !pdb_set_username(new_acct, newname, PDB_CHANGED))
 		goto done;
 
@@ -826,7 +827,8 @@ static NTSTATUS tdbsam_rename_sam_account(struct pdb_methods *my_methods,
 	        int rename_ret;
 
 		pstring_sub(rename_script, "%unew", newname);
-		pstring_sub(rename_script, "%uold", pdb_get_username(oldname));
+		pstring_sub(rename_script, "%uold", 
+			    pdb_get_username(old_acct));
 		rename_ret = smbrun(rename_script, NULL);
 
 		DEBUG(rename_ret ? 0 : 3,("Running the command `%s' gave %d\n", rename_script, rename_ret));
@@ -843,7 +845,7 @@ static NTSTATUS tdbsam_rename_sam_account(struct pdb_methods *my_methods,
 	interim_account = False;
 	tdb_unlock_bystring(pwd_tdb, newname);
 
-	tdb_delete_samacct_only(pwd_tdb, my_methods, oldname);
+	tdb_delete_samacct_only(pwd_tdb, my_methods, old_acct);
 
 	ret = NT_STATUS_OK;
 
diff --git a/source/rpc_server/srv_samr_nt.c b/source/rpc_server/srv_samr_nt.c
index 45a77197ee1..598f9db1dad 100644
--- a/source/rpc_server/srv_samr_nt.c
+++ b/source/rpc_server/srv_samr_nt.c
@@ -2429,7 +2429,9 @@ NTSTATUS _samr_open_alias(pipes_struct *p, SAMR_Q_OPEN_ALIAS *q_u, SAMR_R_OPEN_A
 static NTSTATUS set_user_info_7(const SAM_USER_INFO_7 *id7, SAM_ACCOUNT *pwd)
 {
 	fstring new_name;
+	SAM_ACCOUNT *check_acct = NULL;
 	NTSTATUS rc;
+	BOOL check_rc;
 
 	if (id7 == NULL) {
 		DEBUG(5, ("set_user_info_7: NULL id7\n"));
@@ -2443,6 +2445,24 @@ static NTSTATUS set_user_info_7(const SAM_USER_INFO_7 *id7, SAM_ACCOUNT *pwd)
 		return NT_STATUS_ACCESS_DENIED;
 	}
 
+	/* check to see if the new username already exists.  Note: we can't
+	   reliably lock all backends, so there is potentially the 
+	   possibility that a user can be created in between this check and
+	   the rename.  The rename should fail, but may not get the
+	   exact same failure status code.  I think this is small enough
+	   of a window for this type of operation and the results are
+	   simply that the rename fails with a slightly different status
+	   code (like UNSUCCESSFUL instead of ALREADY_EXISTS). */
+
+	pdb_init_sam(&check_acct);
+	check_rc = pdb_getsampwnam(check_acct, new_name);
+	pdb_free_sam(&check_acct);
+
+	if (check_rc == True) {
+		/* this account exists: say so */
+		return NT_STATUS_USER_EXISTS;
+	}
+
 	rc = pdb_rename_sam_account(pwd, new_name);
 
 	pdb_free_sam(&pwd);