X-Git-Url: https://git.ozlabs.org/?a=blobdiff_plain;f=ccan%2Ftdb2%2Ftdb.c;h=bb181732c90a541f832c5f6ea936d218ff7f1c1a;hb=444fade529f68eb2b0aebbc8de442478c5c6f916;hp=f11701d9ea9c686cfc2b0beefbea069eb3602542;hpb=024a5647e6c81735a93d826b56db0db4bf86fab8;p=ccan

diff --git a/ccan/tdb2/tdb.c b/ccan/tdb2/tdb.c
index f11701d9..bb181732 100644
--- a/ccan/tdb2/tdb.c
+++ b/ccan/tdb2/tdb.c
@@ -1,3 +1,20 @@
+ /*
+   Trivial Database 2: fetch, store and misc routines.
+   Copyright (C) Rusty Russell 2010
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 3 of the License, or (at your option) any later version.
+
+   This library 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with this library; if not, see <http://www.gnu.org/licenses/>.
+*/
 #include "private.h"
 #include <ccan/asprintf/asprintf.h>
 #include <stdarg.h>
@@ -307,6 +324,29 @@ unsigned int tdb_get_flags(struct tdb_context *tdb)
 	return tdb->flags;
 }
 
+static bool readonly_changable(struct tdb_context *tdb, const char *caller)
+{
+	if (tdb->transaction) {
+		tdb->last_error = tdb_logerr(tdb, TDB_ERR_EINVAL,
+					     TDB_LOG_USE_ERROR,
+					     "%s: can't change"
+					     " TDB_RDONLY inside transaction",
+					     caller);
+		return false;
+	}
+
+	if (tdb->file->allrecord_lock.count != 0
+	    || tdb->file->num_lockrecs != 0) {
+		tdb->last_error = tdb_logerr(tdb, TDB_ERR_EINVAL,
+					     TDB_LOG_USE_ERROR,
+					     "%s: can't change"
+					     " TDB_RDONLY holding locks",
+					     caller);
+		return false;
+	}
+	return true;
+}
+
 void tdb_add_flag(struct tdb_context *tdb, unsigned flag)
 {
 	if (tdb->flags & TDB_INTERNAL) {
@@ -332,6 +372,10 @@ void tdb_add_flag(struct tdb_context *tdb, unsigned flag)
 	case TDB_ALLOW_NESTING:
 		tdb->flags |= TDB_ALLOW_NESTING;
 		break;
+	case TDB_RDONLY:
+		if (readonly_changable(tdb, "tdb_add_flag"))
+			tdb->flags |= TDB_RDONLY;
+		break;
 	default:
 		tdb->last_error = tdb_logerr(tdb, TDB_ERR_EINVAL,
 					     TDB_LOG_USE_ERROR,
@@ -365,6 +409,18 @@ void tdb_remove_flag(struct tdb_context *tdb, unsigned flag)
 	case TDB_ALLOW_NESTING:
 		tdb->flags &= ~TDB_ALLOW_NESTING;
 		break;
+	case TDB_RDONLY:
+		if ((tdb->open_flags & O_ACCMODE) == O_RDONLY) {
+			tdb->last_error = tdb_logerr(tdb, TDB_ERR_EINVAL,
+						     TDB_LOG_USE_ERROR,
+						     "tdb_remove_flag: can't"
+						     " remove TDB_RDONLY on tdb"
+						     " opened with O_RDONLY");
+			break;
+		}
+		if (readonly_changable(tdb, "tdb_remove_flag"))
+			tdb->flags &= ~TDB_RDONLY;
+		break;
 	default:
 		tdb->last_error = tdb_logerr(tdb, TDB_ERR_EINVAL,
 					     TDB_LOG_USE_ERROR,
@@ -414,11 +470,11 @@ enum TDB_ERROR COLD tdb_logerr(struct tdb_context *tdb,
 	va_end(ap);
 
 	if (len < 0) {
-		tdb->log_fn(tdb, TDB_LOG_ERROR,
+		tdb->log_fn(tdb, TDB_LOG_ERROR, TDB_ERR_OOM,
 			    "out of memory formatting message:", tdb->log_data);
-		tdb->log_fn(tdb, level, fmt, tdb->log_data);
+		tdb->log_fn(tdb, level, ecode, fmt, tdb->log_data);
 	} else {
-		tdb->log_fn(tdb, level, message, tdb->log_data);
+		tdb->log_fn(tdb, level, ecode, message, tdb->log_data);
 		free(message);
 	}
 	errno = saved_errno;