Add the following ACL editing functions:

  acl_add_perm, acl_clear_perms, acl_copy_entry, acl_create_entry,
  acl_delete_perm, acl_get_permset, acl_get_qualifier, acl_get_tag_type,
  acl_set_permset, acl_set_qualifier, acl_set_tag_type

This brings us within 4 functions of a full ACL editing library.

Reviewed by:	rwatson

1 files changed, 83 insertions, 0 deletions

diff --git a/lib/libc/posix1e/acl_entry.c b/lib/libc/posix1e/acl_entry.c
new file mode 100644
index 0000000..a8755e9
--- /dev/null
+++ b/lib/libc/posix1e/acl_entry.c
@@ -0,0 +1,83 @@
+/*
+ * Copyright (c) 2001 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 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.
+ *
+ * $FreeBSD$
+ */
+
+#include <sys/types.h>
+#include <sys/acl.h>
+
+#include <errno.h>
+#include <stdlib.h>
+
+#define ACL_UNDEFINED_ID	-1
+#define ACL_UNDEFINED_TAG	-1
+
+int
+acl_create_entry(acl_t *acl_p, acl_entry_t *entry_p)
+{
+	acl_t acl;
+	struct acl_entry newentry;
+
+	if (!acl_p || !*acl_p || ((*acl_p)->acl_cnt >= ACL_MAX_ENTRIES) ||
+	    ((*acl_p)->acl_cnt < 0)) {
+		errno = EINVAL;
+		return -1;
+	}
+
+	entry_p = malloc(sizeof(acl_entry_t));
+	if (!entry_p)
+		return -1;
+	*entry_p = malloc(sizeof(struct acl_entry));
+	if (!*entry_p)
+		return -1;
+
+	acl = *acl_p;
+
+	**entry_p = acl->acl_entry[acl->acl_cnt];
+
+	(**entry_p).ae_tag  = ACL_UNDEFINED_TAG;
+	(**entry_p).ae_id   = ACL_UNDEFINED_ID;
+	(**entry_p).ae_perm = ACL_PERM_NONE;
+
+	acl->acl_entry[acl->acl_cnt] = newentry;
+	acl->acl_cnt++;
+
+	**entry_p = newentry;
+
+	/* XXX - ok? */
+	free(*entry_p);
+	free(entry_p);
+
+	return 0;
+}
+
+int
+acl_get_entry(acl_t acl, int entry_id, acl_entry_t *entry_p)
+{
+
+	errno = ENOSYS;
+	return -1;
+}