posix/tst-pathconf.c

   1 /* Test that values of pathconf and fpathconf are consistent for a file.
   2    Copyright (C) 2013-2021 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 <fcntl.h>
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #include <string.h>
  23 #include <unistd.h>
  24 #include <sys/stat.h>
  25
  26
  27 static void prepare (void);
  28 #define PREPARE(argc, argv) prepare ()
  29
  30 static int do_test (void);
  31 #define TEST_FUNCTION do_test ()
  32
  33 #include "../test-skeleton.c"
  34
  35 static int dir_fd;
  36 static char *dirbuf;
  37
  38 static void
  39 prepare (void)
  40 {
  41   size_t test_dir_len = strlen (test_dir);
  42   static const char dir_name[] = "/tst-pathconf.XXXXXX";
  43
  44   size_t dirbuflen = test_dir_len + sizeof (dir_name);
  45   dirbuf = xmalloc (dirbuflen);
  46
  47   snprintf (dirbuf, dirbuflen, "%s%s", test_dir, dir_name);
  48   if (mkdtemp (dirbuf) == NULL)
  49     {
  50       printf ("Cannot create temporary directory: %s\n", strerror (errno));
  51       exit (1);
  52     }
  53
  54   add_temp_file (dirbuf);
  55
  56   dir_fd = open (dirbuf, O_RDONLY);
  57   if (dir_fd == -1)
  58     {
  59       printf ("Cannot open directory: %s\n", strerror (errno));
  60       exit (1);
  61     }
  62 }
  63
  64
  65 static int
  66 do_test (void)
  67 {
  68   int ret = 0;
  69   static const char *fifo_name = "some-fifo";
  70
  71   size_t filenamelen = strlen (dirbuf) + strlen (fifo_name) + 2;
  72   char *filename = xmalloc (filenamelen);
  73
  74   snprintf (filename, filenamelen, "%s/%s", dirbuf, fifo_name);
  75
  76   /* Create a fifo in the directory.  */
  77   int e = mkfifo (filename, 0777);
  78   if (e == -1)
  79     {
  80       printf ("fifo creation failed (%s)\n", strerror (errno));
  81       ret = 1;
  82       goto out_nofifo;
  83     }
  84
  85   long dir_pathconf = pathconf (dirbuf, _PC_PIPE_BUF);
  86
  87   if (dir_pathconf < 0)
  88     {
  89       printf ("pathconf on directory failed: %s\n", strerror (errno));
  90       ret = 1;
  91       goto out_nofifo;
  92     }
  93
  94   long fifo_pathconf = pathconf (filename, _PC_PIPE_BUF);
  95
  96   if (fifo_pathconf < 0)
  97     {
  98       printf ("pathconf on file failed: %s\n", strerror (errno));
  99       ret = 1;
 100       goto out_nofifo;
 101     }
 102
 103   int fifo = open (filename, O_RDONLY | O_NONBLOCK);
 104
 105   if (fifo < 0)
 106     {
 107       printf ("fifo open failed (%s)\n", strerror (errno));
 108       ret = 1;
 109       goto out_nofifo;
 110     }
 111
 112   long dir_fpathconf = fpathconf (dir_fd, _PC_PIPE_BUF);
 113
 114   if (dir_fpathconf < 0)
 115     {
 116       printf ("fpathconf on directory failed: %s\n", strerror (errno));
 117       ret = 1;
 118       goto out;
 119     }
 120
 121   long fifo_fpathconf = fpathconf (fifo, _PC_PIPE_BUF);
 122
 123   if (fifo_fpathconf < 0)
 124     {
 125       printf ("fpathconf on file failed: %s\n", strerror (errno));
 126       ret = 1;
 127       goto out;
 128     }
 129
 130   if (fifo_pathconf != fifo_fpathconf)
 131     {
 132       printf ("fifo pathconf (%ld) != fifo fpathconf (%ld)\n", fifo_pathconf,
 133               fifo_fpathconf);
 134       ret = 1;
 135       goto out;
 136     }
 137
 138   if (dir_pathconf != fifo_pathconf)
 139     {
 140       printf ("directory pathconf (%ld) != fifo pathconf (%ld)\n",
 141               dir_pathconf, fifo_pathconf);
 142       ret = 1;
 143       goto out;
 144     }
 145
 146   if (dir_fpathconf != fifo_fpathconf)
 147     {
 148       printf ("directory fpathconf (%ld) != fifo fpathconf (%ld)\n",
 149               dir_fpathconf, fifo_fpathconf);
 150       ret = 1;
 151       goto out;
 152     }
 153
 154 out:
 155   close (fifo);
 156 out_nofifo:
 157   close (dir_fd);
 158
 159   if (unlink (filename) != 0)
 160     {
 161       printf ("Could not remove fifo (%s)\n", strerror (errno));
 162       ret = 1;
 163     }
 164
 165   return ret;
 166 }