posix/bug-getopt4.c

   1 /* BZ 11041 */
   2 #include <getopt.h>
   3 #include <unistd.h>
   4 #include <stdio.h>
   5
   6 static const struct option opts[] =
   7   {
   8     { "alpha",    optional_argument, NULL, 'a' },
   9     { NULL,       0,                 NULL, 0 }
  10   };
  11
  12 static int
  13 one_test (const char *fmt, int argc, char *argv[], int n, int expected[n])
  14 {
  15   optind = 1;
  16
  17   int res = 0;
  18   for (int i = 0; i < n; ++i)
  19     {
  20       rewind (stderr);
  21       if (ftruncate (fileno (stderr), 0) != 0)
  22         {
  23           puts ("cannot truncate file");
  24           return 1;
  25         }
  26
  27       int c = getopt_long (argc, argv, fmt, opts, NULL);
  28       if (c != expected[i])
  29         {
  30           printf ("format '%s' test %d failed: expected '%c', got '%c'\n",
  31                   fmt, i, expected[i], c);
  32           res = 1;
  33         }
  34       else if (optarg != NULL)
  35         {
  36           printf ("format '%s' test %d failed: optarg is \"%s\", not NULL\n",
  37                   fmt, i, optarg);
  38           res = 1;
  39         }
  40       if (ftell (stderr) != 0)
  41         {
  42           printf ("format '%s' test %d failed: printed to stderr\n",
  43                   fmt, i);
  44           res = 1;
  45         }
  46     }
  47
  48   return res;
  49 }
  50
  51
  52 static int
  53 do_test (void)
  54 {
  55   char *fname = tmpnam (NULL);
  56   if (fname == NULL)
  57     {
  58       puts ("cannot generate name for temporary file");
  59       return 1;
  60     }
  61
  62   if (freopen (fname, "w+", stderr) == NULL)
  63     {
  64       puts ("cannot redirect stderr");
  65       return 1;
  66     }
  67
  68   remove (fname);
  69
  70   int ret = one_test ("W;", 2,
  71                       (char *[2]) { (char *) "bug-getopt4", (char *) "--a" },
  72                       1, (int [1]) { 'a' });
  73
  74   ret |= one_test ("W;", 3,
  75                    (char *[3]) { (char *) "bug-getopt4", (char *) "-W",
  76                                  (char *) "a" },
  77                    1, (int [1]) { 'a' });
  78
  79   if (ret == 0)
  80     puts ("all OK");
  81
  82   return ret;
  83 }
  84
  85 #define TEST_FUNCTION do_test ()
  86 #include "../test-skeleton.c"