linux-kernel - [patch 4/4] signalfd v1

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Message-ID: <Pine.LNX.4.64.0703061711460.3661@alien.or.mcafeemobile.com>
Date:	Tue, 6 Mar 2007 17:37:50 -0800 (PST)
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>
Subject: [patch 4/4] signalfd v1 - compat code ...


The new signalfd system call requires compat code for the sigset_t. This 
patch implements it in fs/compat.c



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



- Davide


fs/compat.c |   20 ++++++++++++++++++++
1 file changed, 20 insertions(+)



Index: linux-2.6.20.ep2/fs/compat.c
===================================================================
--- linux-2.6.20.ep2.orig/fs/compat.c	2007-03-06 17:22:33.000000000 -0800
+++ linux-2.6.20.ep2/fs/compat.c	2007-03-06 17:23:37.000000000 -0800
@@ -2235,3 +2235,23 @@
 	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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