login/tst-ptsname.c

   1 /* Test for ptsname/ptsname_r.
   2    Copyright (C) 2014-2023 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <errno.h>
  20 #include <fcntl.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <unistd.h>
  25
  26 #define DEV_TTY         "/dev/tty"
  27 #define PTSNAME_EINVAL  "./ptsname-einval"
  28
  29 static int
  30 do_single_test (int fd, char *buf, size_t buflen, int expected_err)
  31 {
  32
  33   int ret = ptsname_r (fd, buf, buflen);
  34   int err = errno;
  35
  36   if (expected_err == 0)
  37     {
  38       if (ret != 0)
  39         {
  40           printf ("ptsname_r: expected: return = 0\n");
  41           printf ("           got: return = %d, errno = %d (%s)\n",
  42                   ret, err, strerror (err));
  43           return 1;
  44         }
  45     }
  46   else
  47     {
  48       if (ret == 0 || errno != expected_err)
  49         {
  50           printf ("ptsname_r: expected: return = %d, errno = %d (%s)\n",
  51                   -1, expected_err, strerror (expected_err));
  52           printf ("           got: return = %d, errno = %d (%s)\n",
  53                   ret, err, strerror (err));
  54           return 1;
  55         }
  56     }
  57
  58   return 0;
  59 }
  60
  61 static int
  62 do_test (void)
  63 {
  64   char buf[512];
  65   int result = 0;
  66
  67   /* Tests with a real PTS master.  */
  68   int fd = posix_openpt (O_RDWR);
  69   if (fd != -1)
  70     {
  71       result |= do_single_test (fd, buf, sizeof (buf), 0);
  72       result |= do_single_test (fd, buf, 1, ERANGE);
  73       close (fd);
  74     }
  75   else
  76     printf ("posix_openpt (O_RDWR) failed\nerrno %d (%s)\n",
  77             errno, strerror (errno));
  78
  79   /* Test with a terminal device which is not a PTS master.  */
  80   fd = open (DEV_TTY, O_RDONLY);
  81   if (fd != -1)
  82     {
  83       result |= do_single_test (fd, buf, sizeof (buf), ENOTTY);
  84       close (fd);
  85     }
  86   else
  87     printf ("open (\"%s\", O_RDWR) failed\nerrno %d (%s)\n",
  88             DEV_TTY, errno, strerror (errno));
  89
  90   /* Test with a file.  */
  91   fd = open (PTSNAME_EINVAL, O_RDWR | O_CREAT, 0600);
  92   if (fd != -1)
  93     {
  94       result |= do_single_test (fd, buf, sizeof (buf), ENOTTY);
  95       close (fd);
  96       unlink (PTSNAME_EINVAL);
  97     }
  98   else
  99     printf ("open (\"%s\", O_RDWR | OCREAT) failed\nerrno %d (%s)\n",
 100             PTSNAME_EINVAL, errno, strerror (errno));
 101
 102   return result;
 103 }
 104
 105 #define TEST_FUNCTION do_test ()
 106 #include "../test-skeleton.c"