Mercurial > gnulib
annotate tests/test-fdopendir.c @ 40057:b06060465f09
maint: Run 'make update-copyright'
| author | Paul Eggert <eggert@cs.ucla.edu> |
|---|---|
| date | Tue, 01 Jan 2019 00:25:11 +0100 |
| parents | 10eb9086bea0 |
| children |
| rev | line source |
|---|---|
| 11934 | 1 /* Test opening a directory stream from a file descriptor. |
|
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2 Copyright (C) 2009-2019 Free Software Foundation, Inc. |
| 11934 | 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 | |
| 19190 | 15 along with this program. If not, see <https://www.gnu.org/licenses/>. */ |
| 11934 | 16 |
| 17 /* Written by Eric Blake <ebb9@byu.net>, 2009. */ | |
| 18 | |
| 19 #include <config.h> | |
| 20 | |
| 21 #include <dirent.h> | |
| 22 | |
| 12489 | 23 #include "signature.h" |
| 24 SIGNATURE_CHECK (fdopendir, DIR *, (int)); | |
| 25 | |
| 11934 | 26 #include <errno.h> |
| 27 #include <fcntl.h> | |
| 28 #include <unistd.h> | |
| 29 | |
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30 #include "macros.h" |
| 11934 | 31 |
| 32 int | |
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33 main (int argc _GL_UNUSED, char *argv[]) |
| 11934 | 34 { |
| 35 DIR *d; | |
| 36 int fd; | |
| 37 | |
| 38 /* A non-directory cannot be turned into a directory stream. */ | |
| 12127 | 39 fd = open ("test-fdopendir.tmp", O_RDONLY | O_CREAT, 0600); |
| 11934 | 40 ASSERT (0 <= fd); |
| 41 errno = 0; | |
| 42 ASSERT (fdopendir (fd) == NULL); | |
| 43 ASSERT (errno == ENOTDIR); | |
| 44 ASSERT (close (fd) == 0); | |
| 12127 | 45 ASSERT (unlink ("test-fdopendir.tmp") == 0); |
| 11934 | 46 |
| 47 /* A bad fd cannot be turned into a stream. */ | |
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48 { |
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49 errno = 0; |
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50 ASSERT (fdopendir (-1) == NULL); |
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51 ASSERT (errno == EBADF); |
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52 } |
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53 { |
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54 close (99); |
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55 errno = 0; |
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56 ASSERT (fdopendir (99) == NULL); |
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57 ASSERT (errno == EBADF); |
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58 } |
| 11934 | 59 |
| 60 /* This should work. */ | |
| 61 fd = open (".", O_RDONLY); | |
| 62 ASSERT (0 <= fd); | |
| 63 d = fdopendir (fd); | |
| 64 ASSERT (d); | |
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65 /* fdopendir should not close fd. */ |
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66 ASSERT (dup2 (fd, fd) == fd); |
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67 |
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68 /* Don't test dirfd here. dirfd (d) must return fd on current POSIX |
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69 platforms, but on pre-2008 platforms or on non-POSIX platforms |
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70 dirfd (fd) might return some other descriptor, or -1, and gnulib |
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71 does not work around this porting problem. */ |
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72 |
| 11934 | 73 ASSERT (closedir (d) == 0); |
| 74 /* Now we can guarantee that fd must be closed. */ | |
| 75 errno = 0; | |
| 76 ASSERT (dup2 (fd, fd) == -1); | |
| 77 ASSERT (errno == EBADF); | |
| 78 | |
| 79 return 0; | |
| 80 } |