Add the following POSIX 1003.1e functions and man pages:

  o acl_calc_mask(): calculates the ACL mask entry associated with
    the given ACL.
  o acl_delete_entry(): remove a specified ACL entry from the given
    ACL.

Approved by:	rwatson

1 files changed, 63 insertions, 0 deletions

diff --git a/lib/libc/posix1e/acl_delete_entry.c b/lib/libc/posix1e/acl_delete_entry.c
new file mode 100644
index 0000000..d1f25d2
--- /dev/null
+++ b/lib/libc/posix1e/acl_delete_entry.c
@@ -0,0 +1,63 @@
+/*
+ * 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.
+ *
+ * $FreeBSD$
+ */
+
+/* acl_delete_entry() - delete an ACL entry from an ACL */
+
+#include <sys/types.h>
+#include <sys/acl.h>
+#include <errno.h>
+#include <string.h>
+
+int
+acl_delete_entry(acl_t acl, acl_entry_t entry_d)
+{
+	int i;
+
+	if (!acl || !entry_d || (acl->acl_cnt < 1) ||
+	    (acl->acl_cnt > ACL_MAX_ENTRIES)) {
+		errno = EINVAL;
+		return -1;
+	}
+	for (i = 0; i < acl->acl_cnt; i++) {
+		/* if this is our entry... */
+		if ((acl->acl_entry[i].ae_tag == entry_d->ae_tag) &&
+		    (acl->acl_entry[i].ae_id == entry_d->ae_id)) {
+			/* ...shift the remaining entries... */
+			while (i < acl->acl_cnt - 1)
+				acl->acl_entry[i] = acl->acl_entry[++i];
+			/* ...drop the count and zero the unused entry... */
+			acl->acl_cnt--;
+			bzero(&acl->acl_entry[i], sizeof(struct acl_entry));
+			return 0;
+		}
+	}
+
+
+	errno = EINVAL;
+	return -1;
+}