[PATCH 3/4] hardlink: fix 0-sized file processing

The manual says that -s0 will process 0-sized files normally,
but as it stands (a) hardlink considers 0-sized files unlinkable
(so, with -l, unlistable) and (b) fileeq considers reading an empty
prologue to be an error
---
 lib/fileeq.c          | 2 +-
 misc-utils/hardlink.c | 3 +--
 2 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/lib/fileeq.c b/lib/fileeq.c
index b40eba2b0..1f7f90ccb 100644
--- a/lib/fileeq.c
+++ b/lib/fileeq.c
@@ -465,7 +465,7 @@ static ssize_t get_intro(struct ul_fileeq *eq, struct ul_fileeq_data *data,
 			return -1;
 		rsz = read_all(fd, (char *) data->intro, sizeof(data->intro));
 		DBG(DATA, ul_debugobj(data, " read %zu bytes intro", sizeof(data->intro)));
-		if (rsz <= 0)
+		if (rsz < 0)
 			return -1;
 		data->nblocks = 1;
 	}
diff --git a/misc-utils/hardlink.c b/misc-utils/hardlink.c
index 643df7cf2..8c5f24aad 100644
--- a/misc-utils/hardlink.c
+++ b/misc-utils/hardlink.c
@@ -649,8 +649,7 @@ static int file_xattrs_equal(const struct file *a, const struct file *b)
  */
 static int file_may_link_to(const struct file *a, const struct file *b)
 {
-	return (a->st.st_size != 0 &&
-		a->st.st_size == b->st.st_size &&
+	return (a->st.st_size == b->st.st_size &&
 		a->links != NULL && b->links != NULL &&
 		a->st.st_dev == b->st.st_dev &&
 		a->st.st_ino != b->st.st_ino &&
-- 
2.39.2

-----BEGIN PGP SIGNATURE-----
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=y3Uy
-----END PGP SIGNATURE-----