Discussion: https://lore.kernel.org/lkml/20180702084622.GA15274@yury-thinkpad/ Although RENAME_* macros are exposed in kernel headers, they are not used by glibc. That's because linux/fs.h which hosts RENAME_* is considered unsuitable by glibc developers: As Florian Weimer wrote: > <linux/fs.h> undefines and defines macros not mentioned in the standards > (and it even contains a few unrelated structs), so we cannot include it > without _GNU_SOURCE. > > It might be possible to include it only for _GNU_SOURCE, but there are a > lot of things in <linux/fs.h>, so that does not seem to be particularly > advisable. In this patch RENAME_* is removed to a separated header file that conforms the standards and therefore is suitable for inclusion by glibc. v2: - rename dedicated file to 'rename-flags.h', as requested by Florian. Signed-off-by: Yury Norov <ynorov@xxxxxxxxxxxxxxxxxx> --- include/uapi/linux/fs.h | 4 +--- include/uapi/linux/rename-flags.h | 12 ++++++++++++ 2 files changed, 13 insertions(+), 3 deletions(-) create mode 100644 include/uapi/linux/rename-flags.h diff --git a/include/uapi/linux/fs.h b/include/uapi/linux/fs.h index 73e01918f996..34c308203746 100644 --- a/include/uapi/linux/fs.h +++ b/include/uapi/linux/fs.h @@ -39,9 +39,7 @@ #define SEEK_HOLE 4 /* seek to the next hole */ #define SEEK_MAX SEEK_HOLE -#define RENAME_NOREPLACE (1 << 0) /* Don't overwrite target */ -#define RENAME_EXCHANGE (1 << 1) /* Exchange source and dest */ -#define RENAME_WHITEOUT (1 << 2) /* Whiteout source */ +#include <linux/rename-flags.h> struct file_clone_range { __s64 src_fd; diff --git a/include/uapi/linux/rename-flags.h b/include/uapi/linux/rename-flags.h new file mode 100644 index 000000000000..7178f0565657 --- /dev/null +++ b/include/uapi/linux/rename-flags.h @@ -0,0 +1,12 @@ +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ +#ifndef _UAPI_LINUX_RENAME_H +#define _UAPI_LINUX_RENAME_H + +/* + * Definitions for rename syscall family. + */ +#define RENAME_NOREPLACE (1 << 0) /* Don't overwrite target */ +#define RENAME_EXCHANGE (1 << 1) /* Exchange source and dest */ +#define RENAME_WHITEOUT (1 << 2) /* Whiteout source */ + +#endif /* _UAPI_LINUX_RENAME_H */ -- 2.17.1
