misc/tst-mntent-autofs.c

   1 /* Test autofs "ignore" filtering for getment_r.
   2    Copyright (C) 2019-2024 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 <array_length.h>
  20 #include <errno.h>
  21 #include <mntent.h>
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <string.h>
  25 #include <support/check.h>
  26 #include <support/temp_file.h>
  27 #include <support/xstdio.h>
  28 #include <support/xunistd.h>
  29
  30 struct test_case
  31 {
  32   const char *line;
  33   struct
  34   {
  35     /* Like struct mntent, but with const pointers.  */
  36     const char *mnt_fsname;
  37     const char *mnt_dir;
  38     const char *mnt_type;
  39     const char *mnt_opts;
  40     int mnt_freq;
  41     int mnt_passno;
  42   } expected;
  43 };
  44
  45 static struct test_case test_cases[] =
  46   {
  47     { "/etc/auto.direct /mnt/auto/1 autofs defaults 0 0",
  48       { "/etc/auto.direct", "/mnt/auto/1", "autofs", "defaults", 0, 0 } },
  49
  50     /* These entries are filtered out.  */
  51     { "/etc/auto.2 /mnt/auto/2 autofs ignore 0 0", { NULL, } },
  52     { "/etc/auto.3 /mnt/auto/3 autofs ignore,other 1 2", { NULL, } },
  53     { "/etc/auto.4 /mnt/auto/4 autofs other,ignore 3 4", { NULL, } },
  54     { "/etc/auto.5 /mnt/auto/5 autofs opt1,ignore,opt2 5 6", { NULL, } },
  55
  56     /* Dummy entry to make the desynchronization more obvious.  */
  57     { "/dev/sda1 / xfs defaults 0 0",
  58       { "/dev/sda1", "/", "xfs", "defaults", 0, 0 } },
  59
  60     /* These are not filtered because the file system is not autofs.  */
  61     { "/etc/auto.direct /mnt/auto/6 autofs1 ignore 0 0",
  62       { "/etc/auto.direct", "/mnt/auto/6", "autofs1", "ignore", 0, 0 } },
  63     { "/etc/auto.direct /mnt/auto/7 autofs1 ignore,other 0 0",
  64       { "/etc/auto.direct", "/mnt/auto/7", "autofs1", "ignore,other", 0, 0 } },
  65     { "/etc/auto.direct /mnt/auto/8 autofs1 other,ignore 0 0",
  66       { "/etc/auto.direct", "/mnt/auto/8", "autofs1", "other,ignore", 0, 0 } },
  67     { "/etc/auto.direct /mnt/auto/9 autofs1 opt1,ignore,opt2 0 0",
  68       { "/etc/auto.direct", "/mnt/auto/9", "autofs1", "opt1,ignore,opt2", } },
  69
  70     /* These are not filtered because the string "ignore" is not an
  71        option name.  */
  72     { "/etc/auto.direct /mnt/auto/10 autofs noignore 1 2",
  73       { "/etc/auto.direct", "/mnt/auto/10", "autofs", "noignore", 1, 2 } },
  74     { "/etc/auto.direct /mnt/auto/11 autofs noignore,other 0 0",
  75       { "/etc/auto.direct", "/mnt/auto/11", "autofs", "noignore,other", } },
  76     { "/etc/auto.direct /mnt/auto/12 autofs other,noignore 0 0",
  77       { "/etc/auto.direct", "/mnt/auto/12", "autofs", "other,noignore", } },
  78     { "/etc/auto.direct /mnt/auto/13 autofs errors=ignore 0 0",
  79       { "/etc/auto.direct", "/mnt/auto/13", "autofs", "errors=ignore", } },
  80     { "/etc/auto.direct /mnt/auto/14 autofs errors=ignore,other 0 0",
  81       { "/etc/auto.direct", "/mnt/auto/14", "autofs",
  82         "errors=ignore,other", } },
  83     { "/etc/auto.direct /mnt/auto/15 autofs other,errors=ignore 0 0",
  84       { "/etc/auto.direct", "/mnt/auto/15", "autofs",
  85         "other,errors=ignore", } },
  86
  87     /* These are not filtered because the string is escaped.  '\151'
  88        is 'i', but it is not actually decoded by the parser.  */
  89     { "/etc/auto.\\151gnore /mnt/auto/16 autofs \\151gnore 0 0",
  90       { "/etc/auto.\\151gnore", "/mnt/auto/16", "autofs",
  91         "\\151gnore", } },
  92   };
  93
  94 static int
  95 do_test (void)
  96 {
  97   char *path;
  98   xclose (create_temp_file ("tst-mntent-autofs-", &path));
  99
 100   /* Write the test file.  */
 101   FILE *fp = xfopen (path, "w");
 102   for (size_t i = 0; i < array_length (test_cases); ++i)
 103     fprintf (fp, "%s\n", test_cases[i].line);
 104   xfclose (fp);
 105
 106   /* Open the test file again, this time for parsing.  */
 107   fp = setmntent (path, "r");
 108   TEST_VERIFY_EXIT (fp != NULL);
 109   char buffer[512];
 110   struct mntent me;
 111
 112   for (size_t i = 0; i < array_length (test_cases); ++i)
 113     {
 114       if (test_cases[i].expected.mnt_type == NULL)
 115         continue;
 116
 117       memset (buffer, 0xcc, sizeof (buffer));
 118       memset (&me, 0xcc, sizeof (me));
 119       struct mntent *pme = getmntent_r (fp, &me, buffer, sizeof (buffer));
 120       TEST_VERIFY_EXIT (pme != NULL);
 121       TEST_VERIFY (pme == &me);
 122       TEST_COMPARE_STRING (test_cases[i].expected.mnt_fsname, me.mnt_fsname);
 123       TEST_COMPARE_STRING (test_cases[i].expected.mnt_dir, me.mnt_dir);
 124       TEST_COMPARE_STRING (test_cases[i].expected.mnt_type, me.mnt_type);
 125       TEST_COMPARE_STRING (test_cases[i].expected.mnt_opts, me.mnt_opts);
 126       TEST_COMPARE (test_cases[i].expected.mnt_freq, me.mnt_freq);
 127       TEST_COMPARE (test_cases[i].expected.mnt_passno, me.mnt_passno);
 128     }
 129
 130   TEST_VERIFY (getmntent_r (fp, &me, buffer, sizeof (buffer)) == NULL);
 131
 132   TEST_COMPARE (feof (fp), 1);
 133   TEST_COMPARE (ferror (fp), 0);
 134   errno = 0;
 135   TEST_COMPARE (endmntent (fp), 1);
 136   TEST_COMPARE (errno, 0);
 137   free (path);
 138   return 0;
 139 }
 140
 141 #include <support/test-driver.c>