1 files changed, 9 insertions, 4 deletions
diff --git a/src/syncio.c b/src/syncio.c
index b2843d5fb..48e0a0b79 100644
--- a/src/syncio.c
+++ b/src/syncio.c
@@ -118,7 +118,9 @@ ssize_t syncRead(int fd, char *ptr, ssize_t size, long long timeout) {
 }
 
 /* Read a line making sure that every char will not require more than 'timeout'
- * milliseconds to be read.
+ * milliseconds to be read. Empty newlines before the first non-empty line
+ * are ignored. This is useful because since Redis sometimes uses empty
+ * newlines in order to take the connection "alive".
  *
  * On success the number of bytes read is returned, otherwise -1.
  * On success the string is always correctly terminated with a 0 byte. */
@@ -131,9 +133,12 @@ ssize_t syncReadLine(int fd, char *ptr, ssize_t size, long long timeout) {
 
         if (syncRead(fd,&c,1,timeout) == -1) return -1;
         if (c == '\n') {
-            *ptr = '\0';
-            if (nread && *(ptr-1) == '\r') *(ptr-1) = '\0';
-            return nread;
+            /* Ignore empty lines, otherwise return to the caller. */
+            if (nread != 0) {
+                *ptr = '\0';
+                if (nread && *(ptr-1) == '\r') *(ptr-1) = '\0';
+                return nread;
+            }
         } else {
             *ptr++ = c;
             *ptr = '\0';