Update

src/examples/mcat.c

+/* mcat.c
+
+   Prints files specified on command line to the console, using
+   mmap. */
+
+#include <stdio.h>
+#include <syscall.h>
+
+int
+main (int argc, char *argv[])
+{
+  int i;
+
+  for (i = 1; i < argc; i++)
+    {
+      int fd;
+      mapid_t map;
+      void *data = (void *) 0x10000000;
+      int size;
+
+      /* Open input file. */
+      fd = open (argv[i]);
+      if (fd < 0)
+        {
+          printf ("%s: open failed\n", argv[i]);
+          return EXIT_FAILURE;
+        }
+      size = filesize (fd);
+
+      /* Map files. */
+      map = mmap (fd, data);
+      if (map == MAP_FAILED)
+        {
+          printf ("%s: mmap failed\n", argv[i]);
+          return EXIT_FAILURE;
+        }
+
+      /* Write file to console. */
+      write (STDOUT_FILENO, data, size);
+
+      /* Unmap files (optional). */
+      munmap (map);
+    }
+  return EXIT_SUCCESS;
+}