nptl/tst-umask1.c

   1 /* Copyright (C) 2003-2017 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
   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    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <fcntl.h>
  20 #include <pthread.h>
  21 #include <stdbool.h>
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <unistd.h>
  25 #include <sys/stat.h>
  26
  27
  28 static struct
  29 {
  30   int (*fp) (const char *, mode_t);
  31   const char *name;
  32   bool is_fd;
  33 } fcts[] =
  34 {
  35   { creat, "creat", true },
  36   { mkdir, "mkdir", false },
  37   { mkfifo, "mkfifo", false },
  38 };
  39 #define nfcts (sizeof (fcts) / sizeof (fcts[0]))
  40
  41
  42 static int
  43 work (const char *fname, int mask)
  44 {
  45   int result = 0;
  46   size_t i;
  47   for (i = 0; i < nfcts; ++i)
  48     {
  49       remove (fname);
  50       int fd = fcts[i].fp (fname, 0777);
  51       if (fd == -1)
  52         {
  53           printf ("cannot %s %s: %m\n", fcts[i].name, fname);
  54           exit (1);
  55         }
  56       if (fcts[i].is_fd)
  57         close (fd);
  58       struct stat64 st;
  59       if (stat64 (fname, &st) == -1)
  60         {
  61           printf ("cannot stat %s after %s: %m\n", fname, fcts[i].name);
  62           exit (1);
  63         }
  64
  65       if ((st.st_mode & mask) != 0)
  66         {
  67           printf ("mask not successful after %s: %x still set\n",
  68                   fcts[i].name, (unsigned int) (st.st_mode & mask));
  69           result = 1;
  70         }
  71     }
  72
  73   return result;
  74 }
  75
  76
  77 static pthread_barrier_t bar;
  78
  79
  80 static void *
  81 tf (void *arg)
  82 {
  83   pthread_barrier_wait (&bar);
  84
  85   int result = work (arg, 022);
  86
  87   pthread_barrier_wait (&bar);
  88
  89   pthread_barrier_wait (&bar);
  90
  91   return (work (arg, 0) | result) ? (void *) -1l : NULL;
  92 }
  93
  94
  95 static int
  96 do_test (const char *fname)
  97 {
  98   int result = 0;
  99
 100   umask (0);
 101   result |= work (fname, 0);
 102
 103   pthread_barrier_init (&bar, NULL, 2);
 104
 105   pthread_t th;
 106   if (pthread_create (&th, NULL, tf, (void *) fname) != 0)
 107     {
 108       puts ("cannot create thread");
 109       exit (1);
 110     }
 111
 112   umask (022);
 113   result |= work (fname, 022);
 114
 115   pthread_barrier_wait (&bar);
 116
 117   pthread_barrier_wait (&bar);
 118
 119   umask (0);
 120
 121   pthread_barrier_wait (&bar);
 122
 123   void *res;
 124   if (pthread_join (th, &res) != 0)
 125     {
 126       puts ("join failed");
 127       exit (1);
 128     }
 129
 130   remove (fname);
 131
 132   return result || res != NULL;
 133 }
 134
 135 #define TEST_FUNCTION do_test (argc < 2 ? "/tmp/tst-umask.tmp" : argv[1])
 136 #include "../test-skeleton.c"