From 1df94ae08a5207c2778a2d0f089974cdf03b9933 Mon Sep 17 00:00:00 2001
From: OpenAI <noreply@openai.com>
Date: Wed, 10 Jun 2026 20:07:58 +0000
Subject: [PATCH] rights: fix modify checks for DOS attribute updates

---
 src/connect.c  | 2 +-
 src/nwattrib.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/connect.c b/src/connect.c
index 59e408f..dec95b8 100644
--- a/src/connect.c
+++ b/src/connect.c
@@ -1896,7 +1896,7 @@ static int do_set_file_info(NW_PATH *nwpath, FUNC_SEARCH *fs)
   if (!stat(unname, &statb)) {
     if (S_ISFIFO(statb.st_mode) || (voloptions&VOL_OPTION_IS_PIPE))
       return(0); /* do nothing but report OK */
-    if (tru_eff_rights_exists(nwpath->volume, unname, &statb, TRUSTEE_M))
+    if (!tru_eff_rights_exists(nwpath->volume, unname, &statb, TRUSTEE_M))
       result=-0x8c;  /* no modify rights */
   } else result=-0xff;
   if (!result) {
diff --git a/src/nwattrib.c b/src/nwattrib.c
index 0096e5b..b227864 100644
--- a/src/nwattrib.c
+++ b/src/nwattrib.c
@@ -221,7 +221,7 @@ static int set_nw_attrib(
   int voloptions=get_volume_options(volume);
   if (voloptions & VOL_OPTION_IS_PIPE)
      return(0); /* we return with no error */
-  if (tru_eff_rights_exists(volume, unixname, stb, TRUSTEE_M))
+  if (!tru_eff_rights_exists(volume, unixname, stb, TRUSTEE_M))
      return(-0x8c); /* no modify rights */
   if (!(voloptions & VOL_OPTION_ATTRIBUTES)) {
     if (!(get_unix_eff_rights(stb) & W_OK)) {