From eccdbbc338e83356033fa473b17d3e693e4dea65 Mon Sep 17 00:00:00 2001
From: Rob Landley <rob@landley.net>
Date: Mon, 24 Feb 2025 12:05:09 -0600
Subject: [PATCH] Clear inherited signal handlers/ignores in recursive exec
 path.

---
 main.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/main.c b/main.c
index 2d3fc2e8..69cc8afc 100644
--- a/main.c
+++ b/main.c
@@ -240,8 +240,12 @@ void toy_exec_which(struct toy_list *which, char *argv[])
   // so convert to integers. (LP64 says sizeof(long)==sizeof(pointer).)
   // Signed typecast so stack growth direction is irrelevant: we're measuring
   // the distance between two pointers on the same stack, hence the labs().
-  if (!CFG_TOYBOX_NORECURSE && toys.stacktop)
+  if (!CFG_TOYBOX_NORECURSE && toys.stacktop) {
+    int i;
+
     if (labs((long)toys.stacktop-(long)&which)>24000) return;
+    for (i = 0; i<NSIG; i++) signal(i, SIG_DFL);
+  }
 
   // Return if we need to re-exec to acquire root via suid bit.
   if (toys.which && (which->flags&TOYFLAG_ROOTONLY) && toys.wasroot) return;
-- 
2.39.5