Branch data     Line data    Source code

       1                 :            : /* Test of opening a file descriptor.
       2                 :            :    Copyright (C) 2007-2012 Free Software Foundation, Inc.
       3                 :            : 
       4                 :            :    This program is free software: you can redistribute it and/or modify
       5                 :            :    it under the terms of the GNU General Public License as published by
       6                 :            :    the Free Software Foundation; either version 3 of the License, or
       7                 :            :    (at your option) any later version.
       8                 :            : 
       9                 :            :    This program is distributed in the hope that it will be useful,
      10                 :            :    but WITHOUT ANY WARRANTY; without even the implied warranty of
      11                 :            :    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      12                 :            :    GNU General Public License for more details.
      13                 :            : 
      14                 :            :    You should have received a copy of the GNU General Public License
      15                 :            :    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
      16                 :            : 
      17                 :            : /* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
      18                 :            : 
      19                 :            : /* This file is designed to test both open(n,buf[,mode]) and
      20                 :            :    openat(AT_FDCWD,n,buf[,mode]).  FUNC is the function to test.
      21                 :            :    Assumes that BASE and ASSERT are already defined, and that
      22                 :            :    appropriate headers are already included.  If PRINT, warn before
      23                 :            :    skipping symlink tests with status 77.  */
      24                 :            : 
      25                 :            : static int
      26                 :          1 : test_open (int (*func) (char const *, int, ...), bool print)
      27                 :            : {
      28                 :            :   int fd;
      29                 :            :   /* Remove anything from prior partial run.  */
      30                 :          1 :   unlink (BASE "file");
      31                 :            : 
      32                 :            :   /* Cannot create directory.  */
      33                 :          1 :   errno = 0;
      34         [ -  + ]:          1 :   ASSERT (func ("nonexist.ent/", O_CREAT | O_RDONLY, 0600) == -1);
      35 [ +  - ][ -  + ]:          1 :   ASSERT (errno == ENOTDIR || errno == EISDIR || errno == ENOENT
         [ #  # ][ #  # ]
      36                 :            :           || errno == EINVAL);
      37                 :            : 
      38                 :            :   /* Create a regular file.  */
      39                 :          1 :   fd = func (BASE "file", O_CREAT | O_RDONLY, 0600);
      40         [ -  + ]:          1 :   ASSERT (0 <= fd);
      41         [ -  + ]:          1 :   ASSERT (close (fd) == 0);
      42                 :            : 
      43                 :            :   /* Trailing slash handling.  */
      44                 :          1 :   errno = 0;
      45         [ -  + ]:          1 :   ASSERT (func (BASE "file/", O_RDONLY) == -1);
      46 [ -  + ][ #  # ]:          1 :   ASSERT (errno == ENOTDIR || errno == EISDIR || errno == EINVAL);
                 [ #  # ]
      47                 :            : 
      48                 :            :   /* Directories cannot be opened for writing.  */
      49                 :          1 :   errno = 0;
      50         [ -  + ]:          1 :   ASSERT (func (".", O_WRONLY) == -1);
      51 [ -  + ][ #  # ]:          1 :   ASSERT (errno == EISDIR || errno == EACCES);
      52                 :            : 
      53                 :            :   /* /dev/null must exist, and be writable.  */
      54                 :          1 :   fd = func ("/dev/null", O_RDONLY);
      55         [ -  + ]:          1 :   ASSERT (0 <= fd);
      56                 :            :   {
      57                 :            :     char c;
      58         [ -  + ]:          1 :     ASSERT (read (fd, &c, 1) == 0);
      59                 :            :   }
      60         [ -  + ]:          1 :   ASSERT (close (fd) == 0);
      61                 :          1 :   fd = func ("/dev/null", O_WRONLY);
      62         [ -  + ]:          1 :   ASSERT (0 <= fd);
      63         [ -  + ]:          1 :   ASSERT (write (fd, "c", 1) == 1);
      64         [ -  + ]:          1 :   ASSERT (close (fd) == 0);
      65                 :            : 
      66                 :            :   /* Although O_NONBLOCK on regular files can be ignored, it must not
      67                 :            :      cause a failure.  */
      68                 :          1 :   fd = func (BASE "file", O_NONBLOCK | O_RDONLY);
      69         [ -  + ]:          1 :   ASSERT (0 <= fd);
      70         [ -  + ]:          1 :   ASSERT (close (fd) == 0);
      71                 :            : 
      72                 :            :   /* Symlink handling, where supported.  */
      73         [ -  + ]:          1 :   if (symlink (BASE "file", BASE "link") != 0)
      74                 :            :     {
      75         [ #  # ]:          0 :       ASSERT (unlink (BASE "file") == 0);
      76         [ #  # ]:          0 :       if (print)
      77                 :          0 :         fputs ("skipping test: symlinks not supported on this file system\n",
      78                 :            :                stderr);
      79                 :          0 :       return 77;
      80                 :            :     }
      81                 :          1 :   errno = 0;
      82         [ -  + ]:          1 :   ASSERT (func (BASE "link/", O_RDONLY) == -1);
      83         [ -  + ]:          1 :   ASSERT (errno == ENOTDIR);
      84                 :          1 :   fd = func (BASE "link", O_RDONLY);
      85         [ -  + ]:          1 :   ASSERT (0 <= fd);
      86         [ -  + ]:          1 :   ASSERT (close (fd) == 0);
      87                 :            : 
      88                 :            :   /* Cleanup.  */
      89         [ -  + ]:          1 :   ASSERT (unlink (BASE "file") == 0);
      90         [ -  + ]:          1 :   ASSERT (unlink (BASE "link") == 0);
      91                 :            : 
      92                 :          1 :   return 0;
      93                 :            : }