From 05bac9a3ce652220d5d791f646ded29fa7487b70 Mon Sep 17 00:00:00 2001
From: smitsohu <smitsohu@gmail.com>
Date: Sun, 19 Aug 2018 19:31:14 +0200
Subject: small enhancement to join.c (ready-for-join is always a regular file)

---
 src/firejail/join.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/firejail/join.c b/src/firejail/join.c
index 1e25999e2..910e97d07 100644
--- a/src/firejail/join.c
+++ b/src/firejail/join.c
@@ -240,7 +240,7 @@ static void check_ready_for_join(pid_t pid) {
 	struct stat s;
 	if (fstat(fd, &s) == -1)
 		errExit("fstat");
-	if (s.st_uid != 0)
+	if (!S_ISREG(s.st_mode) || s.st_uid != 0)
 		goto errexit;
 	// check if it is non-empty
 	char buf[BUFLEN];
-- 
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