linux-kernel - [patch 5/13] signal/timer/event fds v7

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Date:	Mon, 19 Mar 2007 16:47:51 -0700
From:	Davide Libenzi <davidel@...ilserver.org>
To:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Oleg Nesterov <oleg@...sign.ru>
Subject: [patch 5/13] signal/timer/event fds v7 - signalfd compat code ...

This patch implement the necessary compat code for the signalfd system call.


Signed-off-by: Davide Libenzi <davidel@...ilserver.org>


- Davide



Index: linux-2.6.21-rc3.quilt/fs/compat.c
===================================================================
--- linux-2.6.21-rc3.quilt.orig/fs/compat.c	2007-03-19 16:03:26.000000000 -0700
+++ linux-2.6.21-rc3.quilt/fs/compat.c	2007-03-19 16:41:32.000000000 -0700
@@ -46,6 +46,7 @@
 #include <linux/rwsem.h>
 #include <linux/tsacct_kern.h>
 #include <linux/highmem.h>
+#include <linux/signal.h>
 #include <linux/poll.h>
 #include <linux/mm.h>
 
@@ -2235,3 +2236,24 @@
 	return sys_ni_syscall();
 }
 #endif
+
+asmlinkage long compat_sys_signalfd(int ufd,
+				    const compat_sigset_t __user *sigmask,
+				    compat_size_t sigsetsize)
+{
+	compat_sigset_t ss32;
+	sigset_t tmp;
+	sigset_t __user *ksigmask;
+
+	if (sigsetsize != sizeof(compat_sigset_t))
+		return -EINVAL;
+	if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
+		return -EFAULT;
+	sigset_from_compat(&tmp, &ss32);
+	ksigmask = compat_alloc_user_space(sizeof(sigset_t));
+	if (copy_to_user(ksigmask, &tmp, sizeof(sigset_t)))
+		return -EFAULT;
+
+	return sys_signalfd(ufd, ksigmask, sizeof(sigset_t));
+}
+

-
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