[PATCH 6/8] UML - Block SIGWINCH in ptrace tester child

[Jeff Dike <jdike@addtoit.com>]

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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