Update

src/examples/cat.c

+/* cat.c
+
+   Prints files specified on command line to the console. */
+
+#include <stdio.h>
+#include <syscall.h>
+
+int
+main (int argc, char *argv[])
+{
+  bool success = true;
+  int i;
+
+  for (i = 1; i < argc; i++)
+    {
+      int fd = open (argv[i]);
+      if (fd < 0)
+        {
+          printf ("%s: open failed\n", argv[i]);
+          success = false;
+          continue;
+        }
+      for (;;)
+        {
+          char buffer[1024];
+          int bytes_read = read (fd, buffer, sizeof buffer);
+          if (bytes_read == 0)
+            break;
+          write (STDOUT_FILENO, buffer, bytes_read);
+        }
+      close (fd);
+    }
+  return success ? EXIT_SUCCESS : EXIT_FAILURE;
+}