From: Jeff Dike <jdike@addtoit.com>
To: akpm@osdl.org
Cc: linux-kernel@vger.kernel.org,
user-mode-linux-devel@lists.sourceforge.net
Subject: [uml-devel] [PATCH 6/8] UML - Block SIGWINCH in ptrace tester child
Date: Mon, 06 Feb 2006 21:24:03 -0500 [thread overview]
Message-ID: <200602070224.k172O384009674@ccure.user-mode-linux.org> (raw)
The process that UML uses to probe the host's ptrace capabilities can (rarely)
receive a SIGWINCH, confusing the parent. This fixes that by blocking
SIGWINCH.
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Index: linux-2.6.15/arch/um/os-Linux/start_up.c
===================================================================
--- linux-2.6.15.orig/arch/um/os-Linux/start_up.c 2006-02-06 17:33:55.000000000 -0500
+++ linux-2.6.15/arch/um/os-Linux/start_up.c 2006-02-06 17:36:29.000000000 -0500
@@ -49,6 +49,7 @@ static int ptrace_child(void *arg)
int pid = os_getpid(), ppid = getppid();
int sc_result;
+ change_sig(SIGWINCH, 0);
if(ptrace(PTRACE_TRACEME, 0, 0, 0) < 0){
perror("ptrace");
os_kill_process(pid, 0);
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