o POSIX.2c Userland tool support for POSIX.1e ACLs -- getfacl retrieves ACLs

  from files and directories, and setfacl sets ACLs on files and directories.

Submitted by:	jedgar
Obtained from:	TrustedBSD Project

1 files changed, 100 insertions, 0 deletions

diff --git a/bin/setfacl/mask.c b/bin/setfacl/mask.c
new file mode 100644
index 0000000..5992e94
--- /dev/null
+++ b/bin/setfacl/mask.c
@@ -0,0 +1,100 @@
+/*
+ * 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 THE VOICES IN HIS HEAD 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 <sys/stat.h>
+
+#include <err.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sysexits.h>
+
+#include "setfacl.h"
+
+/* set the appropriate mask the given ACL's */
+int
+set_acl_mask(acl_t prev_acl)
+{
+	acl_t acl;
+	int i;
+
+	/*
+	 * ... if a mask entry is specified, then the permissions of the mask
+	 * entry in the resulting ACL shall be set to the permissions in the
+	 * specified ACL mask entry.
+	 */
+	if (have_mask)
+		return 0;
+
+	acl = acl_dup(prev_acl);
+	if (!acl)
+		err(EX_OSERR, "acl_dup() failed");
+
+	if (!n_flag) {
+		/*
+		 * If no mask entry is specified and the -n option is not
+		 * specified, then the permissions of the resulting ACL mask
+		 * entry shall be set to the union of the permissions
+		 * associated with all entries which belong to the file group
+		 * class in the resulting ACL
+		 */
+		if (acl_calc_mask(&acl)) {
+			warn("acl_calc_mask() failed");
+			acl_free(acl);
+			return -1;
+		}
+	} else {
+		/*
+		 * If no mask entry is specified and the -n option is
+		 * specified, then the permissions of the resulting ACL
+		 * mask entry shall remain unchanged ...
+		 */
+		for (i = 0; i < acl->acl_cnt; i++)
+			if (acl->acl_entry[i].ae_tag == ACL_MASK) {
+				acl_free(acl);
+				return 0;
+			}
+
+		/*
+		 * If no mask entry is specified, the -n option is specified,
+		 * and no ACL mask entry exists in the ACL associated with the
+		 * file, then write an error message to standard error and
+		 * continue with the next file.
+		 */
+		warnx("warning: no mask entry");
+		acl_free(acl);
+		return 0;
+	}
+
+	*prev_acl = *acl;
+	acl_free(acl);
+
+	return 0;
+}