io/tst-ttyname_r.c

   1 #include <errno.h>
   2 #include <error.h>
   3 #include <fcntl.h>
   4 #include <stdio.h>
   5 #include <unistd.h>
   6
   7 static void do_prepare (void);
   8 #define PREPARE(argc, argv) do_prepare ()
   9 static int do_test (void);
  10 #define TEST_FUNCTION do_test ()
  11 #include <test-skeleton.c>
  12
  13 static int temp_fd;
  14
  15 static void
  16 do_prepare (void)
  17 {
  18   char *temp_file;
  19   temp_fd = create_temp_file ("tst-ttyname_r.", &temp_file);
  20   if (temp_fd == -1)
  21     error (1, errno, "cannot create temporary file");
  22 }
  23
  24 static int
  25 do_test (void)
  26 {
  27   int ret = 0;
  28   char buf[sysconf (_SC_TTY_NAME_MAX) + 1];
  29   int res = ttyname_r (-1, buf, sizeof (buf));
  30   if (res != EBADF)
  31     {
  32       printf ("1st ttyname_r returned with res %d\n", res);
  33       ret++;
  34     }
  35   res = ttyname_r (temp_fd, buf, sizeof (buf));
  36   if (res != ENOTTY)
  37     {
  38       printf ("2nd ttyname_r returned with res %d\n", res);
  39       ret++;
  40     }
  41   return ret;
  42 }