posix/tst-getopt_long1.c

   1 static void do_prepare (void);
   2 #define PREPARE(argc, argv) do_prepare ()
   3 static int do_test (void);
   4 #define TEST_FUNCTION do_test ()
   5 #include "../test-skeleton.c"
   6
   7
   8 static char *fname;
   9
  10
  11 static void
  12 do_prepare (void)
  13 {
  14   if (create_temp_file ("tst-getopt_long1", &fname) < 0)
  15     {
  16       printf ("cannot create temp file: %m\n");
  17       exit (1);
  18     }
  19 }
  20
  21
  22 static const struct option opts[] =
  23   {
  24     { "one", no_argument, NULL, '1' },
  25     { "two", no_argument, NULL, '2' },
  26     { "one-one", no_argument, NULL, '3' },
  27     { "four", no_argument, NULL, '4' },
  28     { "onto", no_argument, NULL, '5' },
  29     { NULL, 0, NULL, 0 }
  30   };
  31
  32
  33 static int
  34 do_test (void)
  35 {
  36   if (freopen (fname, "w+", stderr) == NULL)
  37     {
  38       printf ("freopen failed: %m\n");
  39       return 1;
  40     }
  41
  42   char *argv[] = { "program", "--on" };
  43   int argc = 2;
  44
  45   int c = getopt_long (argc, argv, "12345", opts, NULL);
  46   printf ("return value: %c\n", c);
  47
  48   rewind (stderr);
  49   char *line = NULL;
  50   size_t len = 0;
  51   if (getline (&line, &len, stderr) < 0)
  52     {
  53       printf ("cannot read stderr redirect: %m\n");
  54       return 1;
  55     }
  56   printf ("message = \"%s\"\n", line);
  57
  58   static const char expected[] = "\
  59 program: option '--on' is ambiguous; possibilities: '--one' '--onto' '--one-one'\n";
  60
  61   return c != '?' || strcmp (line, expected) != 0;
  62 }