posix/bug-getopt4.c

   1 /* BZ 11041 */
   2 #include <getopt.h>
   3 #include <unistd.h>
   4 #include <stdio.h>
   5 #include <stdlib.h>
   6
   7 static const struct option opts[] =
   8   {
   9     { "alpha",    optional_argument, NULL, 'a' },
  10     { NULL,       0,                 NULL, 0 }
  11   };
  12
  13 static int
  14 one_test (const char *fmt, int argc, char *argv[], int n, int expected[n])
  15 {
  16   optind = 1;
  17
  18   int res = 0;
  19   for (int i = 0; i < n; ++i)
  20     {
  21       rewind (stderr);
  22       if (ftruncate (fileno (stderr), 0) != 0)
  23         {
  24           puts ("cannot truncate file");
  25           return 1;
  26         }
  27
  28       int c = getopt_long (argc, argv, fmt, opts, NULL);
  29       if (c != expected[i])
  30         {
  31           printf ("%s: format '%s' test %d failed: expected '%c', got '%c'\n",
  32                   argv[0], fmt, i, expected[i], c);
  33           res = 1;
  34         }
  35       else if (optarg != NULL)
  36         {
  37           printf ("%s: format '%s' test %d failed: optarg is \"%s\", not NULL\n",
  38                   argv[0], fmt, i, optarg);
  39           res = 1;
  40         }
  41       if (ftell (stderr) != 0)
  42         {
  43           printf ("%s: format '%s' test %d failed: printed to stderr\n",
  44                   argv[0], fmt, i);
  45           res = 1;
  46         }
  47     }
  48
  49   return res;
  50 }
  51
  52
  53 static int
  54 do_test (void)
  55 {
  56   char fname[] = "/tmp/bug-getopt4.XXXXXX";
  57   int fd = mkstemp (fname);
  58   if (fd == -1)
  59     {
  60       printf ("mkstemp failed: %m\n");
  61       return 1;
  62     }
  63   close (fd);
  64
  65   if (freopen (fname, "w+", stderr) == NULL)
  66     {
  67       puts ("cannot redirect stderr");
  68       return 1;
  69     }
  70
  71   remove (fname);
  72
  73   int ret = one_test ("W;", 2,
  74                       (char *[2]) { (char *) "bug-getopt4a", (char *) "--a" },
  75                       1, (int [1]) { 'a' });
  76
  77   ret |= one_test ("W;", 3,
  78                    (char *[3]) { (char *) "bug-getopt4b", (char *) "-W",
  79                                  (char *) "a" },
  80                    1, (int [1]) { 'a' });
  81
  82   if (ret == 0)
  83     puts ("all OK");
  84
  85   return ret;
  86 }
  87
  88 #define TEST_FUNCTION do_test ()
  89 #include "../test-skeleton.c"