[PATCH 3/6] libimaevm: Rename variable returned from readlink to len

[Stefan Berger <stefanb@linux.ibm.com>]

The variable returned from readlink is a length indicator of the
number of bytes placed into a buffer, not only an error. Leave
a note in the code that a zero-length link is also treated as an
error, besdies the usual -1.

Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
---
 src/libimaevm.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/src/libimaevm.c b/src/libimaevm.c
index 0137884..9a6739b 100644
--- a/src/libimaevm.c
+++ b/src/libimaevm.c
@@ -213,15 +213,16 @@ static int add_dir_hash(const char *file, EVP_MD_CTX *ctx)
 
 static int add_link_hash(const char *path, EVP_MD_CTX *ctx)
 {
-	int err;
+	int len;
 	char buf[1024];
 
-	err = readlink(path, buf, sizeof(buf));
-	if (err <= 0)
+	len = readlink(path, buf, sizeof(buf));
+	/* 0-length links are also an error */
+	if (len <= 0)
 		return -1;
 
-	log_info("link: %s -> %.*s\n", path, err, buf);
-	return !EVP_DigestUpdate(ctx, buf, err);
+	log_info("link: %s -> %.*s\n", path, len, buf);
+	return !EVP_DigestUpdate(ctx, buf, len);
 }
 
 static int add_dev_hash(struct stat *st, EVP_MD_CTX *ctx)
-- 
2.30.2