lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame] | 1 | /* Test if ftw function doesn't leak fds. |
| 2 | Copyright (C) 2003-2015 Free Software Foundation, Inc. |
| 3 | This file is part of the GNU C Library. |
| 4 | Contributed by Jakub Jelinek <jakub@redhat.com>, 2003. |
| 5 | |
| 6 | The GNU C Library is free software; you can redistribute it and/or |
| 7 | modify it under the terms of the GNU Lesser General Public |
| 8 | License as published by the Free Software Foundation; either |
| 9 | version 2.1 of the License, or (at your option) any later version. |
| 10 | |
| 11 | The GNU C Library is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | Lesser General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU Lesser General Public |
| 17 | License along with the GNU C Library; if not, see |
| 18 | <http://www.gnu.org/licenses/>. */ |
| 19 | |
| 20 | #include <fcntl.h> |
| 21 | #include <ftw.h> |
| 22 | #include <stdlib.h> |
| 23 | #include <stdio.h> |
| 24 | #include <string.h> |
| 25 | #include <sys/stat.h> |
| 26 | #include <unistd.h> |
| 27 | |
| 28 | static int cb_called; |
| 29 | |
| 30 | static int |
| 31 | cb (const char *name, const struct stat64 *st, int type) |
| 32 | { |
| 33 | return cb_called++ & 1; |
| 34 | } |
| 35 | |
| 36 | int |
| 37 | main (void) |
| 38 | { |
| 39 | char name[32] = "/tmp/ftwXXXXXX", *p; |
| 40 | int ret, i, result = 0, fd, fd1, fd2; |
| 41 | |
| 42 | if (mkdtemp (name) == NULL) |
| 43 | { |
| 44 | printf ("Couldn't make temporary directory: %m\n"); |
| 45 | exit (EXIT_FAILURE); |
| 46 | } |
| 47 | p = strchr (name, '\0'); |
| 48 | strcpy (p, "/1"); |
| 49 | if (mkdir (name, 0755) < 0) |
| 50 | { |
| 51 | printf ("Couldn't make temporary subdirectory: %m\n"); |
| 52 | exit (EXIT_FAILURE); |
| 53 | } |
| 54 | *p = '\0'; |
| 55 | |
| 56 | ret = ftw64 (name, cb, 20); |
| 57 | if (ret != 1) |
| 58 | { |
| 59 | printf ("ftw64 returned %d instead of 1", ret); |
| 60 | result = 1; |
| 61 | } |
| 62 | |
| 63 | fd = open (name, O_RDONLY); |
| 64 | if (fd < 0) |
| 65 | { |
| 66 | printf ("open failed: %m\n"); |
| 67 | result = 1; |
| 68 | } |
| 69 | fd1 = open (name, O_RDONLY); |
| 70 | if (fd1 < 0) |
| 71 | { |
| 72 | printf ("open failed: %m\n"); |
| 73 | result = 1; |
| 74 | } |
| 75 | else |
| 76 | close (fd1); |
| 77 | if (fd >= 0) |
| 78 | close (fd); |
| 79 | |
| 80 | for (i = 0; i < 128; ++i) |
| 81 | { |
| 82 | ret = ftw64 (name, cb, 20); |
| 83 | if (ret != 1) |
| 84 | { |
| 85 | printf ("ftw64 returned %d instead of 1", ret); |
| 86 | result = 1; |
| 87 | } |
| 88 | } |
| 89 | |
| 90 | fd = open (name, O_RDONLY); |
| 91 | if (fd < 0) |
| 92 | { |
| 93 | printf ("open failed: %m\n"); |
| 94 | result = 1; |
| 95 | } |
| 96 | fd2 = open (name, O_RDONLY); |
| 97 | if (fd2 < 0) |
| 98 | { |
| 99 | printf ("open failed: %m\n"); |
| 100 | result = 1; |
| 101 | } |
| 102 | else |
| 103 | close (fd2); |
| 104 | if (fd >= 0) |
| 105 | close (fd); |
| 106 | |
| 107 | if (fd2 >= fd1 + 128) |
| 108 | { |
| 109 | printf ("ftw64 leaking fds: %d -> %d\n", fd1, fd2); |
| 110 | result = 1; |
| 111 | } |
| 112 | |
| 113 | if (cb_called != 129 * 2) |
| 114 | { |
| 115 | printf ("callback called %d times\n", cb_called); |
| 116 | result = 1; |
| 117 | } |
| 118 | |
| 119 | strcpy (p, "/1"); |
| 120 | rmdir (name); |
| 121 | *p = '\0'; |
| 122 | rmdir (name); |
| 123 | return result; |
| 124 | } |