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