utimensat: AT_EMPTY_PATH support (44a3b874) · Commits · 戴 / test

This makes it possible to use utimensat on an O_PATH file (including symlinks). It supersedes the nonstandard utimensat(fd, NULL, ...) form. Cc: linux-api@vger.kernel.org Cc: linux-man@vger.kernel.org Signed-off-by:

Miklos Szeredi <mszeredi@redhat.com> Reviewed-by:

Christoph Hellwig <hch@lst.de>

fs/utimes.c

+4 −2

Original line number	Diff line number	Diff line
		@@ -95,13 +95,13 @@ long do_utimes(int dfd, const char __user filename, struct timespec64 times,
		goto out;
		}

		if (flags & ~AT_SYMLINK_NOFOLLOW)
		if (flags & ~(AT_SYMLINK_NOFOLLOW \| AT_EMPTY_PATH))
		goto out;

		if (filename == NULL && dfd != AT_FDCWD) {
		struct fd f;

		if (flags & AT_SYMLINK_NOFOLLOW)
		if (flags)
		goto out;

		f = fdget(dfd);
		@@ -117,6 +117,8 @@ long do_utimes(int dfd, const char __user filename, struct timespec64 times,

		if (!(flags & AT_SYMLINK_NOFOLLOW))
		lookup_flags \|= LOOKUP_FOLLOW;
		if (flags & AT_EMPTY_PATH)
		lookup_flags \|= LOOKUP_EMPTY;
		retry:
		error = user_path_at(dfd, filename, lookup_flags, &path);
		if (error)

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