commit 3c2e7eadcc0ed083e94f5c4c62663772869a3038
Author: Oswald Buddenhagen <[email protected]>
Date: Sun Sep 9 12:18:14 2012 +0200
call fdatasync() after updating .uidvalidity files
they must be flushed before the file system meta data, as otherwise we
may end up with duplicate UIDs after a system crash.
src/drv_maildir.c | 6 +++++-
1 files changed, 5 insertions(+), 1 deletions(-)
diff --git a/src/drv_maildir.c b/src/drv_maildir.c
index a9f5790..771cf48 100644
--- a/src/drv_maildir.c
+++ b/src/drv_maildir.c
@@ -42,6 +42,10 @@
# define LEGACY_FLOCK 1
#endif
+#ifndef _POSIX_SYNCHRONIZED_IO
+# define fdatasync fsync
+#endif
+
#ifdef USE_DB
#include <db.h>
#endif /* USE_DB */
@@ -428,7 +432,7 @@ maildir_store_uid( maildir_store_t *ctx )
n = sprintf( buf, "%d\n%d\n", ctx->gen.uidvalidity, ctx->nuid );
lseek( ctx->uvfd, 0, SEEK_SET );
- if (write( ctx->uvfd, buf, n ) != n || ftruncate( ctx->uvfd, n )) {
+ if (write( ctx->uvfd, buf, n ) != n || ftruncate( ctx->uvfd, n ) ||
fdatasync( ctx->uvfd )) {
error( "Maildir error: cannot write UIDVALIDITY.\n" );
return DRV_BOX_BAD;
}
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