diff options
Diffstat (limited to 'support')
| -rw-r--r-- | support/Makefile | 1 | ||||
| -rw-r--r-- | support/support.h | 3 | ||||
| -rw-r--r-- | support/support_stat_nanoseconds.c | 31 |
3 files changed, 35 insertions, 0 deletions
diff --git a/support/Makefile b/support/Makefile index fc9f493..900e17f 100644 --- a/support/Makefile +++ b/support/Makefile @@ -71,6 +71,7 @@ libsupport-routines = \ support_set_small_thread_stack_size \ support_shared_allocate \ support_small_stack_thread_attribute \ + support_stat_nanoseconds \ support_subprocess \ support_test_compare_blob \ support_test_compare_failure \ diff --git a/support/support.h b/support/support.h index 2e477c9..90f3ff9 100644 --- a/support/support.h +++ b/support/support.h @@ -134,6 +134,9 @@ extern ssize_t support_copy_file_range (int, off64_t *, int, off64_t *, operations (such as fstatat or utimensat). */ extern bool support_path_support_time64 (const char *path); +/* Return true if stat supports nanoseconds resolution. */ +extern bool support_stat_nanoseconds (void); + __END_DECLS #endif /* SUPPORT_H */ diff --git a/support/support_stat_nanoseconds.c b/support/support_stat_nanoseconds.c new file mode 100644 index 0000000..c0d5b2c --- /dev/null +++ b/support/support_stat_nanoseconds.c @@ -0,0 +1,31 @@ +/* Check if stat supports nanosecond resolution. + Copyright (C) 2021 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 <stdbool.h> + +bool +support_stat_nanoseconds (void) +{ + /* s390 stat64 compat symbol does not support nanoseconds resolution + and it used on non-LFS [f,l]stat[at] implementations. */ +#if defined __linux__ && !defined __s390x__ && defined __s390__ + return false; +#else + return true; +#endif +} |