nbackup is unable to open a FDB file when the file is not owner by the current user although the current user has read permission. This happens because O_NOATIME is only allowed if the current user either owns the file or is root.

open(".../database.fdb", O_RDONLY|O_DIRECT|O_NOATIME) = -1 EPERM (Operation not permitted)

Proposed fix:


--- src/utilities/nbackup.cpp.orig 2010-10-27 03:00:32.068887122 +0200
+++ src/utilities/nbackup.cpp 2010-10-27 03:03:36.801352983 +0200
@@ -336,6 +336,10 @@
 #define O_DIRECT 0
 #endif // O_DIRECT
        dbase = open(dbname.c_str(), O_RDONLY | O_LARGEFILE | O_NOATIME | O_DIRECT);
+ if (dbase < 0 && O_NOATIME)
+ // O_NOATIME fails unless we are either root or the owner of the file
+ // try again without O_NOATIME
+ dbase = open(dbname.c_str(), O_RDONLY | O_LARGEFILE | O_DIRECT);
        if (dbase < 0)
                b_error::raise("Error (%d) opening database file: %s", errno, dbname.c_str());
 #ifdef HAVE_POSIX_FADVISE