From fb73fc8292d507e9d6f368da5f2c2ac3e3f85e45 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?P=C5=99emysl=20Janouch?= <p.janouch@gmail.com>
Date: Fri, 14 Jul 2017 21:49:32 +0200
Subject: Mark files that make use of POSIX ACLs

---
 sdn.cpp | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

(limited to 'sdn.cpp')

diff --git a/sdn.cpp b/sdn.cpp
index c9cf895..05577e3 100644
--- a/sdn.cpp
+++ b/sdn.cpp
@@ -26,15 +26,18 @@
 #include <cstdlib>
 #include <fstream>
 
-#include <ncurses.h>
 #include <unistd.h>
 #include <dirent.h>
 #include <sys/stat.h>
 #include <sys/inotify.h>
+#include <sys/acl.h>
 #include <fcntl.h>
 #include <pwd.h>
 #include <grp.h>
 
+#include <acl/libacl.h>
+#include <ncurses.h>
+
 // Unicode is complex enough already and we might make assumptions
 #ifndef __STDC_ISO_10646__
 #error Unicode required for wchar_t
@@ -288,7 +291,15 @@ static struct {
 
 fun make_row (const string &filename, const struct stat &info) -> row {
 	row r;
-	r.cols[row::MODES] = apply_attrs (decode_mode (info.st_mode), 0);
+	auto mode = decode_mode (info.st_mode);
+	if (auto acl = acl_get_file (filename.c_str (), ACL_TYPE_ACCESS)) {
+		mode_t m;
+		// This is a Linux-only extension
+		if (!acl_equiv_mode (acl, &m) && (m ^ info.st_mode) & 0777)
+			mode += L"+";
+		acl_free (acl);
+	}
+	r.cols[row::MODES] = apply_attrs (mode, 0);
 
 	auto user = to_wstring (info.st_uid);
 	if (auto u = getpwuid (info.st_uid))
-- 
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