dovecot-2.2: lib-fs: If backend doesn't implement exists(), emul...

[dovecot at dovecot.org]

details:   http://hg.dovecot.org/dovecot-2.2/rev/d483e6eb9a2c
changeset: 16728:d483e6eb9a2c
user:      Timo Sirainen <tss at iki.fi>
date:      Sat Sep 14 00:26:45 2013 +0300
description:
lib-fs: If backend doesn't implement exists(), emulate it with stat().

diffstat:

 src/lib-fs/fs-api.c |  8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)

diffs (20 lines):

diff -r 1db5ede2a1cd -r d483e6eb9a2c src/lib-fs/fs-api.c
--- a/src/lib-fs/fs-api.c	Thu Sep 12 03:52:01 2013 +0300
+++ b/src/lib-fs/fs-api.c	Sat Sep 14 00:26:45 2013 +0300
@@ -536,8 +536,16 @@
 
 int fs_exists(struct fs_file *file)
 {
+	struct stat st;
 	int ret;
 
+	if (file->fs->v.exists == NULL) {
+		/* fallback to stat() */
+		if (fs_stat(file, &st) == 0)
+			return 1;
+		else
+			return errno == ENOENT ? 0 : -1;
+	}
 	T_BEGIN {
 		ret = file->fs->v.exists(file);
 	} T_END;