Module Name: src
Committed By: christos
Date: Sat Oct 31 17:45:33 UTC 2015
Modified Files:
src/lib/libc/sys: sigaction.2
Log Message:
mention what we are allowed to do.
To generate a diff of this commit:
cvs rdiff -u -r1.45 -r1.46 src/lib/libc/sys/sigaction.2
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/lib/libc/sys/sigaction.2
diff -u src/lib/libc/sys/sigaction.2:1.45 src/lib/libc/sys/sigaction.2:1.46
--- src/lib/libc/sys/sigaction.2:1.45 Sat Jan 4 10:54:27 2014
+++ src/lib/libc/sys/sigaction.2 Sat Oct 31 13:45:32 2015
@@ -1,4 +1,4 @@
-.\" $NetBSD: sigaction.2,v 1.45 2014/01/04 15:54:27 wiz Exp $
+.\" $NetBSD: sigaction.2,v 1.46 2015/10/31 17:45:32 christos Exp $
.\"
.\" Copyright (c) 1980, 1990, 1993
.\" The Regents of the University of California. All rights reserved.
@@ -29,7 +29,7 @@
.\"
.\" @(#)sigaction.2 8.2 (Berkeley) 4/3/94
.\"
-.Dd June 3, 2006
+.Dd October 31, 2015
.Dt SIGACTION 2
.Os
.Sh NAME
@@ -287,6 +287,22 @@ flag in
.Xr termios 4 .
.El
.Pp
+If the signal handler is called due to signal delively resulting from reasons
+other than direct calls to
+.Xr kill 2
+or
+.Xr _lwp_kill 2
+or indirect calls to
+.Xr _lwp_kill 2
+via
+.Xr abort 3
+or
+.Xr raise 3
+any activity (such as calling functions or assigning variables in the global
+or static scopes) other than setting a variable of the type
+.Dt volatile sig_atomic_t
+is undefined.
+.Pp
Only functions that are async-signal-safe can safely be used in signal
handlers; see
.Xr signal 7
