1 files changed, 128 insertions, 0 deletions
diff --git a/lib/libc/posix1e/acl_perm.c b/lib/libc/posix1e/acl_perm.c
new file mode 100644
index 0000000..ad2f47e
--- /dev/null
+++ b/lib/libc/posix1e/acl_perm.c
@@ -0,0 +1,128 @@
+/*
+ * Copyright (c) 2001-2002 Chris D. Faulhaber
+ * 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 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 <sys/types.h>
+#include "namespace.h"
+#include <sys/acl.h>
+#include "un-namespace.h"
+
+#include <errno.h>
+#include <string.h>
+
+static int
+_perm_is_invalid(acl_perm_t perm)
+{
+
+	/* Check if more than a single bit is set. */
+	if ((perm & -perm) == perm &&
+	    (perm & (ACL_POSIX1E_BITS | ACL_NFS4_PERM_BITS)) == perm)
+		return (0);
+
+	errno = EINVAL;
+
+	return (1);
+}
+
+/*
+ * acl_add_perm() (23.4.1): add the permission contained in perm to the
+ * permission set permset_d
+ */
+int
+acl_add_perm(acl_permset_t permset_d, acl_perm_t perm)
+{
+
+	if (permset_d == NULL) {
+		errno = EINVAL;
+		return (-1);
+	}
+
+	if (_perm_is_invalid(perm))
+		return (-1);
+
+	*permset_d |= perm;
+
+	return (0);
+}
+
+/*
+ * acl_clear_perms() (23.4.3): clear all permisions from the permission
+ * set permset_d
+ */
+int
+acl_clear_perms(acl_permset_t permset_d)
+{
+
+	if (permset_d == NULL) {
+		errno = EINVAL;
+		return (-1);
+	}
+
+	*permset_d = ACL_PERM_NONE;
+
+	return (0);
+}
+
+/*
+ * acl_delete_perm() (23.4.10): remove the permission in perm from the
+ * permission set permset_d
+ */
+int
+acl_delete_perm(acl_permset_t permset_d, acl_perm_t perm)
+{
+
+	if (permset_d == NULL) {
+		errno = EINVAL;
+		return (-1);
+	}
+
+	if (_perm_is_invalid(perm))
+		return (-1);
+
+	*permset_d &= ~perm;
+
+	return (0);
+}
+
+int
+acl_get_perm_np(acl_permset_t permset_d, acl_perm_t perm)
+{
+
+	if (permset_d == NULL) {
+		errno = EINVAL;
+		return (-1);
+	}
+
+	if (_perm_is_invalid(perm))
+		return (-1);
+
+	if (*permset_d & perm)
+		return (1);
+
+	return (0);
+}