diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/tst-readdir64-compat.c')
| -rw-r--r-- | sysdeps/unix/sysv/linux/tst-readdir64-compat.c | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/tst-readdir64-compat.c b/sysdeps/unix/sysv/linux/tst-readdir64-compat.c new file mode 100644 index 0000000000..678b11d4c8 --- /dev/null +++ b/sysdeps/unix/sysv/linux/tst-readdir64-compat.c @@ -0,0 +1,115 @@ +/* Test readdir64 compatibility symbol. + Copyright (C) 2018-2019 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <https://www.gnu.org/licenses/>. */ + +#include <dirent.h> +#include <dlfcn.h> +#include <errno.h> +#include <shlib-compat.h> +#include <stdbool.h> +#include <stdio.h> +#include <string.h> +#include <support/check.h> + +/* Copied from <olddirent.h>. */ +struct __old_dirent64 + { + __ino_t d_ino; + __off64_t d_off; + unsigned short int d_reclen; + unsigned char d_type; + char d_name[256]; + }; + +typedef struct __old_dirent64 *(*compat_readdir64_type) (DIR *); + +#if TEST_COMPAT (libc, GLIBC_2_1, GLIBC_2_2) +struct __old_dirent64 *compat_readdir64 (DIR *); +compat_symbol_reference (libc, compat_readdir64, readdir64, GLIBC_2_1); +#endif + +static int +do_test (void) +{ +#if TEST_COMPAT (libc, GLIBC_2_1, GLIBC_2_2) + + /* Directory stream using the non-compat readdir64 symbol. The test + checks against this. */ + DIR *dir_reference = opendir ("."); + TEST_VERIFY_EXIT (dir_reference != NULL); + DIR *dir_test = opendir ("."); + TEST_VERIFY_EXIT (dir_test != NULL); + + /* This loop assumes that the enumeration order is consistent for + two different handles. Nothing should write to the current + directory (in the source tree) while this test runs, so there + should not be any difference due to races. */ + size_t count = 0; + while (true) + { + errno = 0; + struct dirent64 *entry_reference = readdir64 (dir_reference); + if (entry_reference == NULL && errno != 0) + FAIL_EXIT1 ("readdir64 entry %zu: %m\n", count); + struct __old_dirent64 *entry_test = compat_readdir64 (dir_test); + if (entry_reference == NULL) + { + if (errno == EOVERFLOW) + { + TEST_VERIFY (entry_reference->d_ino + != (__ino_t) entry_reference->d_ino); + printf ("info: inode number overflow at entry %zu\n", count); + break; + } + if (errno != 0) + FAIL_EXIT1 ("compat readdir64 entry %zu: %m\n", count); + } + + /* Check that both streams end at the same time. */ + if (entry_reference == NULL) + { + TEST_VERIFY (entry_test == NULL); + break; + } + else + TEST_VERIFY_EXIT (entry_test != NULL); + + /* d_off is never zero because it is the offset of the next + entry (not the current entry). */ + TEST_VERIFY (entry_reference->d_off > 0); + + /* Check that the entries are the same. */ + TEST_COMPARE_BLOB (entry_reference->d_name, + strlen (entry_reference->d_name), + entry_test->d_name, strlen (entry_test->d_name)); + TEST_COMPARE (entry_reference->d_ino, entry_test->d_ino); + TEST_COMPARE (entry_reference->d_off, entry_test->d_off); + TEST_COMPARE (entry_reference->d_type, entry_test->d_type); + TEST_COMPARE (entry_reference->d_reclen, entry_test->d_reclen); + + ++count; + } + printf ("info: %zu directory entries found\n", count); + TEST_VERIFY (count >= 3); /* ".", "..", and some source files. */ + + TEST_COMPARE (closedir (dir_test), 0); + TEST_COMPARE (closedir (dir_reference), 0); +#endif + return 0; +} + +#include <support/test-driver.c> |