[Midnightbsd-cvs] src [8161] trunk/lib/libc/sys: sigaction(2), sigwait(2), sigwaitinfo(2): Remove [EFAULT] error

[laffer1 at midnightbsd.org]

Revision: 8161
          http://svnweb.midnightbsd.org/src/?rev=8161
Author:   laffer1
Date:     2016-09-16 22:20:13 -0400 (Fri, 16 Sep 2016)
Log Message:
-----------
 sigaction(2),sigwait(2),sigwaitinfo(2): Remove [EFAULT] error
condition.

Passing an invalid pointer results in undefined behaviour.

The wrappers in libthr access some of the data pointed to by the arguments
in userland, so that an invalid pointer will cause a signal and not an
[EFAULT] error return.

Furthermore, if the [EFAULT] error occurs when the kernel is writing, it is
not a proper error in the sense that the call still commits (changing the
signal disposition or accepting the signal).

Obtained from: FreeBSD

Modified Paths:
--------------
    trunk/lib/libc/sys/sigaction.2
    trunk/lib/libc/sys/sigwait.2
    trunk/lib/libc/sys/sigwaitinfo.2

Modified: trunk/lib/libc/sys/sigaction.2
===================================================================
--- trunk/lib/libc/sys/sigaction.2	2016-09-17 02:17:04 UTC (rev 8160)
+++ trunk/lib/libc/sys/sigaction.2	2016-09-17 02:20:13 UTC (rev 8161)
@@ -28,7 +28,7 @@
 .\"	From: @(#)sigaction.2	8.2 (Berkeley) 4/3/94
 .\" $MidnightBSD$
 .\"
-.Dd April 18, 2010
+.Dd September 27, 2012
 .Dt SIGACTION 2
 .Os
 .Sh NAME
@@ -586,13 +586,6 @@
 will fail and no new signal handler will be installed if one
 of the following occurs:
 .Bl -tag -width Er
-.It Bq Er EFAULT
-Either
-.Fa act
-or
-.Fa oact
-points to memory that is not a valid part of the process
-address space.
 .It Bq Er EINVAL
 The
 .Fa sig

Modified: trunk/lib/libc/sys/sigwait.2
===================================================================
--- trunk/lib/libc/sys/sigwait.2	2016-09-17 02:17:04 UTC (rev 8160)
+++ trunk/lib/libc/sys/sigwait.2	2016-09-17 02:20:13 UTC (rev 8161)
@@ -27,7 +27,7 @@
 .\"
 .\" $MidnightBSD$
 .\"
-.Dd August 24, 2011
+.Dd September 27, 2012
 .Dt SIGWAIT 2
 .Os
 .Sh NAME
@@ -107,9 +107,6 @@
 .Fa set
 argument
 specifies one or more invalid signal numbers.
-.It Bq Er EFAULT
-Any arguments point outside the allocated address space or there is a
-memory protection fault.
 .El
 .Sh SEE ALSO
 .Xr sigaction 2 ,

Modified: trunk/lib/libc/sys/sigwaitinfo.2
===================================================================
--- trunk/lib/libc/sys/sigwaitinfo.2	2016-09-17 02:17:04 UTC (rev 8160)
+++ trunk/lib/libc/sys/sigwaitinfo.2	2016-09-17 02:20:13 UTC (rev 8161)
@@ -27,7 +27,7 @@
 .\"
 .\" $MidnightBSD$
 .\"
-.Dd August 24, 2011
+.Dd September 27, 2012
 .Dt SIGTIMEDWAIT 2
 .Os
 .Sh NAME
@@ -172,9 +172,6 @@
 .Bl -tag -width Er
 .It Bq Er EINTR
 The wait was interrupted by an unblocked, caught signal.
-.It Bq Er EFAULT
-Any arguments point outside the allocated address space or there is a
-memory protection fault.
 .Pp
 .El
 The