login/tst-ptsname.c

   1 /* Test for ptsname/ptsname_r.
   2    Copyright (C) 2014-2020 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Aurelien Jarno <aurelien@aurel32.net>, 2014.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <https://www.gnu.org/licenses/>.  */
  19
  20 #include <errno.h>
  21 #include <fcntl.h>
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <string.h>
  25 #include <unistd.h>
  26
  27 #define DEV_TTY         "/dev/tty"
  28 #define PTSNAME_EINVAL  "./ptsname-einval"
  29
  30 static int
  31 do_single_test (int fd, char *buf, size_t buflen, int expected_err)
  32 {
  33
  34   int ret = ptsname_r (fd, buf, buflen);
  35   int err = errno;
  36
  37   if (expected_err == 0)
  38     {
  39       if (ret != 0)
  40         {
  41           printf ("ptsname_r: expected: return = 0\n");
  42           printf ("           got: return = %d, errno = %d (%s)\n",
  43                   ret, err, strerror (err));
  44           return 1;
  45         }
  46     }
  47   else
  48     {
  49       if (ret == 0 || errno != expected_err)
  50         {
  51           printf ("ptsname_r: expected: return = %d, errno = %d (%s)\n",
  52                   -1, expected_err, strerror (expected_err));
  53           printf ("           got: return = %d, errno = %d (%s)\n",
  54                   ret, err, strerror (err));
  55           return 1;
  56         }
  57     }
  58
  59   return 0;
  60 }
  61
  62 static int
  63 do_test (void)
  64 {
  65   char buf[512];
  66   int result = 0;
  67
  68   /* Tests with a real PTS master.  */
  69   int fd = posix_openpt (O_RDWR);
  70   if (fd != -1)
  71     {
  72       result |= do_single_test (fd, buf, sizeof (buf), 0);
  73       result |= do_single_test (fd, buf, 1, ERANGE);
  74       close (fd);
  75     }
  76   else
  77     printf ("posix_openpt (O_RDWR) failed\nerrno %d (%s)\n",
  78             errno, strerror (errno));
  79
  80   /* Test with a terminal device which is not a PTS master.  */
  81   fd = open (DEV_TTY, O_RDONLY);
  82   if (fd != -1)
  83     {
  84       result |= do_single_test (fd, buf, sizeof (buf), ENOTTY);
  85       close (fd);
  86     }
  87   else
  88     printf ("open (\"%s\", O_RDWR) failed\nerrno %d (%s)\n",
  89             DEV_TTY, errno, strerror (errno));
  90
  91   /* Test with a file.  */
  92   fd = open (PTSNAME_EINVAL, O_RDWR | O_CREAT, 0600);
  93   if (fd != -1)
  94     {
  95       result |= do_single_test (fd, buf, sizeof (buf), ENOTTY);
  96       close (fd);
  97       unlink (PTSNAME_EINVAL);
  98     }
  99   else
 100     printf ("open (\"%s\", O_RDWR | OCREAT) failed\nerrno %d (%s)\n",
 101             PTSNAME_EINVAL, errno, strerror (errno));
 102
 103   return result;
 104 }
 105
 106 #define TEST_FUNCTION do_test ()
 107 #include "../test-skeleton.c"