VPP-189 coverity warning cleanups

Change-Id: Ia4fbf4352119504e022b89d10d44a5259d94f316
Signed-off-by: Dave Barach <dave@barachs.net>

7 files changed, 35 insertions, 14 deletions

diff --git a/vlib/vlib/node.c b/vlib/vlib/node.c
index 838f34199bd..3d26559a03d 100644
--- a/vlib/vlib/node.c
+++ b/vlib/vlib/node.c
@@ -486,8 +486,11 @@ vlib_node_main_init (vlib_main_t * vm)
 
 	sib = vlib_get_node_by_name (vm, (u8 *) n->sibling_of);
 	if (!sib)
-	  clib_error ("sibling `%s' not found for node `%v'", n->sibling_of,
-		      n->name);
+          {
+            error = clib_error_create ("sibling `%s' not found for node `%v'", 
+                                       n->sibling_of, n->name);
+            goto done;
+          }
 
         /* *INDENT-OFF* */
 	clib_bitmap_foreach (si, sib->sibling_bitmap, ({
diff --git a/vlib/vlib/threads.c b/vlib/vlib/threads.c
index 47db218dc0e..72f340ea205 100644
--- a/vlib/vlib/threads.c
+++ b/vlib/vlib/threads.c
@@ -81,10 +81,15 @@ void
 vlib_set_thread_name (char *name)
 {
   int pthread_setname_np (pthread_t __target_thread, const char *__name);
+  int rv;
   pthread_t thread = pthread_self ();
 
   if (thread)
-    pthread_setname_np (thread, name);
+    {
+      rv = pthread_setname_np (thread, name);
+      if (rv)
+        clib_warning ("pthread_setname_np returned %d", rv);
+    }
 }
 
 static int
@@ -114,7 +119,8 @@ vlib_sysfs_list_to_bitmap (char *filename)
 	  unformat_input_t in;
 	  unformat_init_string (&in, (char *) buffer,
 				strlen ((char *) buffer));
-	  unformat (&in, "%U", unformat_bitmap_list, &r);
+	  if (unformat (&in, "%U", unformat_bitmap_list, &r) != 1)
+            clib_warning ("unformat_bitmap_list failed");
 	  unformat_free (&in);
 	}
       vec_free (buffer);
diff --git a/vlib/vlib/threads_cli.c b/vlib/vlib/threads_cli.c
index 919baac5640..9ab4edcd357 100644
--- a/vlib/vlib/threads_cli.c
+++ b/vlib/vlib/threads_cli.c
@@ -321,8 +321,8 @@ test_frame_queue_nelts (vlib_main_t * vm, unformat_input_t * input,
   u32 fqix;
   u32 nelts = 0;
 
-  unformat (input, "%d", &nelts);
-  if ((nelts != 4) && (nelts != 8) && (nelts != 16) && (nelts != 32))
+  if ((unformat (input, "%d", &nelts) != 1) ||
+      ((nelts != 4) && (nelts != 8) && (nelts != 16) && (nelts != 32)))
     {
       return clib_error_return (0, "expecting 4,8,16,32");
     }
diff --git a/vlib/vlib/unix/cli.c b/vlib/vlib/unix/cli.c
index e36b80ad990..7d5e10b8b8e 100644
--- a/vlib/vlib/unix/cli.c
+++ b/vlib/vlib/unix/cli.c
@@ -2345,7 +2345,13 @@ unix_cli_resize_interrupt (int signum)
   (void) signum;
 
   /* Terminal resized, fetch the new size */
-  ioctl (UNIX_CLI_STDIN_FD, TIOCGWINSZ, &ws);
+  if (ioctl (UNIX_CLI_STDIN_FD, TIOCGWINSZ, &ws) < 0)
+    {
+      /* "Should never happen..." */
+      clib_unix_warning ("TIOCGWINSZ");
+      /* We can't trust ws.XXX... */
+      return;
+    }
   cf->width = ws.ws_col;
   cf->height = ws.ws_row;
 
@@ -2380,7 +2386,7 @@ unix_cli_config (vlib_main_t * vm, unformat_input_t * input)
       /* Set stdin to be non-blocking. */
       if ((flags = fcntl (UNIX_CLI_STDIN_FD, F_GETFL, 0)) < 0)
 	flags = 0;
-      fcntl (UNIX_CLI_STDIN_FD, F_SETFL, flags | O_NONBLOCK);
+      (void) fcntl (UNIX_CLI_STDIN_FD, F_SETFL, flags | O_NONBLOCK);
 
       cf_index = unix_cli_file_add (cm, "stdin", UNIX_CLI_STDIN_FD);
       cf = pool_elt_at_index (cm->cli_file_pool, cf_index);
diff --git a/vlib/vlib/unix/main.c b/vlib/vlib/unix/main.c
index b8753f4df93..3c17031b884 100644
--- a/vlib/vlib/unix/main.c
+++ b/vlib/vlib/unix/main.c
@@ -89,6 +89,7 @@ unix_signal_handler (int signum, siginfo_t * si, ucontext_t * uc)
 	  clib_longjmp (&unix_main.vlib_main->main_loop_exit,
 			VLIB_MAIN_LOOP_EXIT_CLI);
 	}
+      /* fall through */
     case SIGQUIT:
     case SIGINT:
     case SIGILL:
@@ -344,7 +345,7 @@ unix_config (vlib_main_t * vm, unformat_input_t * input)
 	  int fd;
 
 	  fd = open ("/proc/self/coredump_filter", O_WRONLY);
-	  if (fd > 0)
+	  if (fd >= 0)
 	    {
 	      if (write (fd, "0x6f\n", 5) != 5)
 		clib_unix_warning ("coredump filter write failed!");
@@ -468,7 +469,7 @@ vlib_unix_main (int argc, char *argv[])
 
   /* allocate N x 1mb stacks, aligned e.g. to a 16mb boundary */
   thread_stacks = clib_mem_alloc_aligned
-    (tm->n_thread_stacks * VLIB_THREAD_STACK_SIZE,
+    ((uword) tm->n_thread_stacks * VLIB_THREAD_STACK_SIZE,
      (VLIB_MAX_CPUS << VLIB_LOG2_THREAD_STACK_SIZE));
 
   sm->vm_base = thread_stacks;
diff --git a/vlib/vlib/unix/mc_socket.c b/vlib/vlib/unix/mc_socket.c
index 2077fd7c519..2754b302875 100644
--- a/vlib/vlib/unix/mc_socket.c
+++ b/vlib/vlib/unix/mc_socket.c
@@ -955,7 +955,10 @@ find_interface_ip4_address (char *if_name, u32 * ip4_address, u32 * mtu)
   clib_memcpy (ip4_address, &sa->sin_addr.s_addr, sizeof (ip4_address[0]));
 
   if (ioctl (fd, SIOCGIFMTU, &ifr) < 0)
-    return -1;
+    {
+      close (fd);
+      return -1;
+    }
   if (mtu)
     *mtu = ifr.ifr_mtu - ( /* IP4 header */ 20 + /* UDP header */ 8);
 
diff --git a/vlib/vlib/unix/util.c b/vlib/vlib/unix/util.c
index f4a2c810dfc..9118f5b5283 100644
--- a/vlib/vlib/unix/util.c
+++ b/vlib/vlib/unix/util.c
@@ -103,6 +103,7 @@ vlib_sysfs_write (char *file_name, char *fmt, ...)
 {
   u8 *s;
   int fd;
+  clib_error_t * error = 0;
 
   fd = open (file_name, O_WRONLY);
   if (fd < 0)
@@ -114,11 +115,11 @@ vlib_sysfs_write (char *file_name, char *fmt, ...)
   va_end (va);
 
   if (write (fd, s, vec_len (s)) < 0)
-    return clib_error_return_unix (0, "write `%s'", file_name);
+    error = clib_error_return_unix (0, "write `%s'", file_name);
 
   vec_free (s);
   close (fd);
-  return 0;
+  return error;
 }
 
 clib_error_t *
@@ -181,7 +182,8 @@ vlib_sysfs_link_to_name (char *link)
     return 0;
 
   unformat_init_string (&in, p + 1, strlen (p + 1));
-  unformat (&in, "%s", &s);
+  if (unformat (&in, "%s", &s) != 1)
+    clib_unix_warning ("no string?");
   unformat_free (&in);
 
   return s;