C++ (Cpp) guestfs_get_memsize Examples

Example #1

File: boot-analysis.c Project: AlphaStaxLLC/libguestfs

static void
usage (int exitcode)
{
  guestfs_h *g;
  int default_memsize = -1;

  g = guestfs_create ();
  if (g) {
    default_memsize = guestfs_get_memsize (g);
    guestfs_close (g);
  }

  fprintf (stderr,
           "boot-analysis: Trace and analyze the appliance boot process.\n"
           "Usage:\n"
           "  boot-analysis [--options]\n"
           "Options:\n"
           "  --help         Display this usage text and exit.\n"
           "  --append OPTS  Append OPTS to kernel command line.\n"
           "  --colour       Output colours, even if not a terminal.\n"
           "  -m MB\n"
           "  --memsize MB   Set memory size in MB (default: %d).\n"
           "  --smp N        Enable N virtual CPUs (default: 1).\n"
           "  -v|--verbose   Verbose output, useful for debugging.\n",
           default_memsize);
  exit (exitcode);
}

Example #2

File: test-environment.c Project: yumingfei/libguestfs

int
main (int argc, char *argv[])
{
  guestfs_h *g;
  int r, default_memsize;

  /* What's the default memsize? */
  g = guestfs_create ();
  if (!g) error (EXIT_FAILURE, errno, "guestfs_create");
  default_memsize = guestfs_get_memsize (g);
  if (default_memsize == -1) exit (EXIT_FAILURE);
  guestfs_close (g);

  /* Check that guestfs_create parses the environment. */
  setenv ("LIBGUESTFS_MEMSIZE", "799", 1);
  g = guestfs_create ();
  if (!g) error (EXIT_FAILURE, errno, "guestfs_create");
  assert (guestfs_get_memsize (g) == 799);
  guestfs_close (g);

  /* Check that guestfs_create_flags with no flags parses the environment. */
  setenv ("LIBGUESTFS_MEMSIZE", "798", 1);
  g = guestfs_create_flags (0);
  if (!g) error (EXIT_FAILURE, errno, "guestfs_create_flags");
  assert (guestfs_get_memsize (g) == 798);
  guestfs_close (g);

  /* Check guestfs_create_flags + explicit guestfs_parse_environment. */
  setenv ("LIBGUESTFS_MEMSIZE", "797", 1);
  g = guestfs_create_flags (GUESTFS_CREATE_NO_ENVIRONMENT);
  assert (guestfs_get_memsize (g) == default_memsize);
  if (!g) error (EXIT_FAILURE, errno, "guestfs_create_flags");
  setenv ("LIBGUESTFS_MEMSIZE", "796", 1);
  r = guestfs_parse_environment (g);
  if (r == -1) exit (EXIT_FAILURE);
  assert (guestfs_get_memsize (g) == 796);
  guestfs_close (g);

  /* Check guestfs_parse_environment_list. */
  setenv ("LIBGUESTFS_MEMSIZE", "795", 1);
  g = guestfs_create_flags (GUESTFS_CREATE_NO_ENVIRONMENT);
  assert (guestfs_get_memsize (g) == default_memsize);
  if (!g) error (EXIT_FAILURE, errno, "guestfs_create_flags");
  setenv ("LIBGUESTFS_MEMSIZE", "794", 1);
  const char *local_environment[] = {
    "LIBGUESTFS_MEMSIZE=793",
    "LIBGUESTFS_MEMSIZE_NOT_REALLY_A_VARIABLE=1",
    "FOO=bar",
    "HOME=/homes",
    "BLAH",
    NULL
  };
  r = guestfs_parse_environment_list (g, (char **) local_environment);
  if (r == -1) exit (EXIT_FAILURE);
  assert (guestfs_get_memsize (g) == 793);
  guestfs_close (g);

  exit (EXIT_SUCCESS);
}