diff --git a/lib/cf-socket.c b/lib/cf-socket.c
index 737f6298ba..3e87889f9c 100644
--- a/lib/cf-socket.c
+++ b/lib/cf-socket.c
@@ -1279,7 +1279,7 @@ static ssize_t cf_socket_send(struct Curl_cfilter *cf, struct Curl_easy *data,
 #ifdef DEBUGBUILD
   /* simulate network blocking/partial writes */
   if(ctx->wblock_percent > 0) {
-    unsigned char c;
+    unsigned char c = 0;
     Curl_rand(data, &c, 1);
     if(c >= ((100-ctx->wblock_percent)*256/100)) {
       CURL_TRC_CF(data, cf, "send(len=%zu) SIMULATE EWOULDBLOCK", orig_len);
@@ -1357,7 +1357,7 @@ static ssize_t cf_socket_recv(struct Curl_cfilter *cf, struct Curl_easy *data,
 #ifdef DEBUGBUILD
   /* simulate network blocking/partial reads */
   if(cf->cft != &Curl_cft_udp && ctx->rblock_percent > 0) {
-    unsigned char c;
+    unsigned char c = 0;
     Curl_rand(data, &c, 1);
     if(c >= ((100-ctx->rblock_percent)*256/100)) {
       CURL_TRC_CF(data, cf, "recv(len=%zu) SIMULATE EWOULDBLOCK", len);
diff --git a/lib/curl_gethostname.c b/lib/curl_gethostname.c
index 706b2e6892..bd9b220d49 100644
--- a/lib/curl_gethostname.c
+++ b/lib/curl_gethostname.c
@@ -68,7 +68,7 @@ int Curl_gethostname(char * const name, GETHOSTNAME_TYPE_ARG2 namelen)
   /* Override host name when environment variable CURL_GETHOSTNAME is set */
   const char *force_hostname = getenv("CURL_GETHOSTNAME");
   if(force_hostname) {
-    strncpy(name, force_hostname, namelen);
+    strncpy(name, force_hostname, namelen - 1);
     err = 0;
   }
   else {
diff --git a/lib/hostip.c b/lib/hostip.c
index 4b7ac2577f..93c36e031b 100644
--- a/lib/hostip.c
+++ b/lib/hostip.c
@@ -244,7 +244,7 @@ void Curl_hostcache_prune(struct Curl_easy *data)
   if(data->share)
     Curl_share_lock(data, CURL_LOCK_DATA_DNS, CURL_LOCK_ACCESS_SINGLE);
 
-  time(&now);
+  now = time(NULL);
 
   do {
     /* Remove outdated and unused entries from the hostcache */
@@ -298,7 +298,7 @@ static struct Curl_dns_entry *fetch_addr(struct Curl_easy *data,
     /* See whether the returned entry is stale. Done before we release lock */
     struct hostcache_prune_data user;
 
-    time(&user.now);
+    user.now = time(NULL);
     user.cache_timeout = data->set.dns_cache_timeout;
     user.oldest = 0;
 
diff --git a/lib/tftp.c b/lib/tftp.c
index 09355f1e6e..310a0faba7 100644
--- a/lib/tftp.c
+++ b/lib/tftp.c
@@ -1204,7 +1204,7 @@ static timediff_t tftp_state_timeout(struct Curl_easy *data,
     state->state = TFTP_STATE_FIN;
     return 0;
   }
-  time(&current);
+  current = time(NULL);
   if(current > state->rx_time + state->retry_time) {
     if(event)
       *event = TFTP_EVENT_TIMEOUT;