Add NFSv4 ACL support to libc.

This adds the following functions to the acl(3) API: acl_add_flag_np,
acl_clear_flags_np, acl_create_entry_np, acl_delete_entry_np,
acl_delete_flag_np, acl_get_extended_np, acl_get_flag_np, acl_get_flagset_np,
acl_set_extended_np, acl_set_flagset_np, acl_to_text_np, acl_is_trivial_np,
acl_strip_np, acl_get_brand_np.  Most of them are similar to what Darwin
does.  There are no backward-incompatible changes.

Approved by:    rwatson@

1 files changed, 465 insertions, 0 deletions

diff --git a/lib/libc/posix1e/acl_flag.c b/lib/libc/posix1e/acl_flag.c
new file mode 100644
index 0000000..c4c52b3
--- /dev/null
+++ b/lib/libc/posix1e/acl_flag.c
@@ -0,0 +1,465 @@
+/*-
+ * Copyright (c) 2008, 2009 Edward Tomasz Napierała <trasz@FreeBSD.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <stdio.h>
+#include <errno.h>
+#include <sys/acl.h>
+
+#include "acl_support.h"
+
+static int
+_flag_is_invalid(acl_flag_t flag)
+{
+
+	if ((flag & ACL_FLAGS_BITS) == flag)
+		return (0);
+
+	errno = EINVAL;
+
+	return (1);
+}
+
+int
+acl_add_flag_np(acl_flagset_t flagset_d, acl_flag_t flag)
+{
+
+	if (flagset_d == NULL) {
+		errno = EINVAL;
+		return (-1);
+	}
+
+	if (_flag_is_invalid(flag))
+		return (-1);
+
+	*flagset_d |= flag;
+
+	return (0);
+}
+
+int
+acl_clear_flags_np(acl_flagset_t flagset_d)
+{
+
+	if (flagset_d == NULL) {
+		errno = EINVAL;
+		return (-1);
+	}
+
+	*flagset_d |= 0;
+
+	return (0);
+}
+
+int
+acl_delete_flag_np(acl_flagset_t flagset_d, acl_flag_t flag)
+{
+
+	if (flagset_d == NULL) {
+		errno = EINVAL;
+		return (-1);
+	}
+
+	if (_flag_is_invalid(flag))
+		return (-1);
+
+	*flagset_d &= ~flag;
+
+	return (0);
+}
+
+int
+acl_get_flag_np(acl_flagset_t flagset_d, acl_flag_t flag)
+{
+
+	if (flagset_d == NULL) {
+		errno = EINVAL;
+		return (-1);
+	}
+
+	if (_flag_is_invalid(flag))
+		return (-1);
+
+	if (*flagset_d & flag)
+		return (1);
+
+	return (0);
+}
+
+int
+acl_get_flagset_np(acl_entry_t entry_d, acl_flagset_t *flagset_p)
+{
+
+	if (entry_d == NULL || flagset_p == NULL) {
+		errno = EINVAL;
+		return (-1);
+	}
+
+	if (!_entry_brand_may_be(entry_d, ACL_BRAND_NFS4)) {
+		errno = EINVAL;
+		return (-1);
+	}
+
+	*flagset_p = &entry_d->ae_flags;
+
+	return (0);
+}
+
+int
+acl_set_flagset_np(acl_entry_t entry_d, acl_flagset_t flagset_d)
+{
+
+	if (entry_d == NULL) {
+		errno = EINVAL;
+		return (-1);
+	}
+
+	if (!_entry_brand_may_be(entry_d, ACL_BRAND_NFS4)) {
+		errno = EINVAL;
+		return (-1);
+	}
+
+	_entry_brand_as(entry_d, ACL_BRAND_NFS4);
+
+	if (_flag_is_invalid(*flagset_d))
+		return (-1);
+
+	entry_d->ae_flags = *flagset_d;
+
+	return (0);
+}
+/*-
+ * Copyright (c) 2008, 2009 Edward Tomasz Napierała <trasz@FreeBSD.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <stdio.h>
+#include <errno.h>
+#include <sys/acl.h>
+
+#include "acl_support.h"
+
+static int
+_flag_is_invalid(acl_flag_t flag)
+{
+
+	if ((flag & ACL_FLAGS_BITS) == flag)
+		return (0);
+
+	errno = EINVAL;
+
+	return (1);
+}
+
+int
+acl_add_flag_np(acl_flagset_t flagset_d, acl_flag_t flag)
+{
+
+	if (flagset_d == NULL) {
+		errno = EINVAL;
+		return (-1);
+	}
+
+	if (_flag_is_invalid(flag))
+		return (-1);
+
+	*flagset_d |= flag;
+
+	return (0);
+}
+
+int
+acl_clear_flags_np(acl_flagset_t flagset_d)
+{
+
+	if (flagset_d == NULL) {
+		errno = EINVAL;
+		return (-1);
+	}
+
+	*flagset_d |= 0;
+
+	return (0);
+}
+
+int
+acl_delete_flag_np(acl_flagset_t flagset_d, acl_flag_t flag)
+{
+
+	if (flagset_d == NULL) {
+		errno = EINVAL;
+		return (-1);
+	}
+
+	if (_flag_is_invalid(flag))
+		return (-1);
+
+	*flagset_d &= ~flag;
+
+	return (0);
+}
+
+int
+acl_get_flag_np(acl_flagset_t flagset_d, acl_flag_t flag)
+{
+
+	if (flagset_d == NULL) {
+		errno = EINVAL;
+		return (-1);
+	}
+
+	if (_flag_is_invalid(flag))
+		return (-1);
+
+	if (*flagset_d & flag)
+		return (1);
+
+	return (0);
+}
+
+int
+acl_get_flagset_np(acl_entry_t entry_d, acl_flagset_t *flagset_p)
+{
+
+	if (entry_d == NULL || flagset_p == NULL) {
+		errno = EINVAL;
+		return (-1);
+	}
+
+	if (!_entry_brand_may_be(entry_d, ACL_BRAND_NFS4)) {
+		errno = EINVAL;
+		return (-1);
+	}
+
+	*flagset_p = &entry_d->ae_flags;
+
+	return (0);
+}
+
+int
+acl_set_flagset_np(acl_entry_t entry_d, acl_flagset_t flagset_d)
+{
+
+	if (entry_d == NULL) {
+		errno = EINVAL;
+		return (-1);
+	}
+
+	if (!_entry_brand_may_be(entry_d, ACL_BRAND_NFS4)) {
+		errno = EINVAL;
+		return (-1);
+	}
+
+	_entry_brand_as(entry_d, ACL_BRAND_NFS4);
+
+	if (_flag_is_invalid(*flagset_d))
+		return (-1);
+
+	entry_d->ae_flags = *flagset_d;
+
+	return (0);
+}
+/*-
+ * Copyright (c) 2008, 2009 Edward Tomasz Napierała <trasz@FreeBSD.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <stdio.h>
+#include <errno.h>
+#include <sys/acl.h>
+
+#include "acl_support.h"
+
+static int
+_flag_is_invalid(acl_flag_t flag)
+{
+
+	if ((flag & ACL_FLAGS_BITS) == flag)
+		return (0);
+
+	errno = EINVAL;
+
+	return (1);
+}
+
+int
+acl_add_flag_np(acl_flagset_t flagset_d, acl_flag_t flag)
+{
+
+	if (flagset_d == NULL) {
+		errno = EINVAL;
+		return (-1);
+	}
+
+	if (_flag_is_invalid(flag))
+		return (-1);
+
+	*flagset_d |= flag;
+
+	return (0);
+}
+
+int
+acl_clear_flags_np(acl_flagset_t flagset_d)
+{
+
+	if (flagset_d == NULL) {
+		errno = EINVAL;
+		return (-1);
+	}
+
+	*flagset_d |= 0;
+
+	return (0);
+}
+
+int
+acl_delete_flag_np(acl_flagset_t flagset_d, acl_flag_t flag)
+{
+
+	if (flagset_d == NULL) {
+		errno = EINVAL;
+		return (-1);
+	}
+
+	if (_flag_is_invalid(flag))
+		return (-1);
+
+	*flagset_d &= ~flag;
+
+	return (0);
+}
+
+int
+acl_get_flag_np(acl_flagset_t flagset_d, acl_flag_t flag)
+{
+
+	if (flagset_d == NULL) {
+		errno = EINVAL;
+		return (-1);
+	}
+
+	if (_flag_is_invalid(flag))
+		return (-1);
+
+	if (*flagset_d & flag)
+		return (1);
+
+	return (0);
+}
+
+int
+acl_get_flagset_np(acl_entry_t entry_d, acl_flagset_t *flagset_p)
+{
+
+	if (entry_d == NULL || flagset_p == NULL) {
+		errno = EINVAL;
+		return (-1);
+	}
+
+	if (!_entry_brand_may_be(entry_d, ACL_BRAND_NFS4)) {
+		errno = EINVAL;
+		return (-1);
+	}
+
+	*flagset_p = &entry_d->ae_flags;
+
+	return (0);
+}
+
+int
+acl_set_flagset_np(acl_entry_t entry_d, acl_flagset_t flagset_d)
+{
+
+	if (entry_d == NULL) {
+		errno = EINVAL;
+		return (-1);
+	}
+
+	if (!_entry_brand_may_be(entry_d, ACL_BRAND_NFS4)) {
+		errno = EINVAL;
+		return (-1);
+	}
+
+	_entry_brand_as(entry_d, ACL_BRAND_NFS4);
+
+	if (_flag_is_invalid(*flagset_d))
+		return (-1);
+
+	entry_d->ae_flags = *flagset_d;
+
+	return (0);
+}