Commit 55e4def0 authored by David Howells's avatar David Howells Committed by Al Viro
Browse files

VFS: Make chown() and lchown() call fchownat() 



Make the chown() and lchown() syscalls jump to the fchownat() syscall with the
appropriate extra arguments.

Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent c3c4f694

fs/open.c

+7 −34
Original line number Diff line number Diff line
@@ -537,25 +537,6 @@ static int chown_common(struct path *path, uid_t user, gid_t group) 
	return error;

}



SYSCALL_DEFINE3(chown, const char __user *, filename, uid_t, user, gid_t, group)

{

	struct path path;

	int error;



	error = user_path(filename, &path);

	if (error)

		goto out;

	error = mnt_want_write(path.mnt);

	if (error)

		goto out_release;

	error = chown_common(&path, user, group);

	mnt_drop_write(path.mnt);

out_release:

	path_put(&path);

out:

	return error;

}



SYSCALL_DEFINE5(fchownat, int, dfd, const char __user *, filename, uid_t, user,

		gid_t, group, int, flag)

{
@@ -583,23 +564,15 @@ out: 
	return error;

}



SYSCALL_DEFINE3(lchown, const char __user *, filename, uid_t, user, gid_t, group)

SYSCALL_DEFINE3(chown, const char __user *, filename, uid_t, user, gid_t, group)

{

	struct path path;

	int error;

	return sys_fchownat(AT_FDCWD, filename, user, group, 0);

}



	error = user_lpath(filename, &path);

	if (error)

		goto out;

	error = mnt_want_write(path.mnt);

	if (error)

		goto out_release;

	error = chown_common(&path, user, group);

	mnt_drop_write(path.mnt);

out_release:

	path_put(&path);

out:

	return error;

SYSCALL_DEFINE3(lchown, const char __user *, filename, uid_t, user, gid_t, group)

{

	return sys_fchownat(AT_FDCWD, filename, user, group,

			    AT_SYMLINK_NOFOLLOW);

}



SYSCALL_DEFINE3(fchown, unsigned int, fd, uid_t, user, gid_t, group)

CRA Git | Maintained and supported by SUSTech CRA and CCSE