xnu-3789.51.2.tar.gz

[apple/xnu.git] / bsd / man / man2 / sigaction.2

diff --git a/bsd/man/man2/sigaction.2 b/bsd/man/man2/sigaction.2
index 42e77900261cf7f28229586682964d03f97f06ad..9a0b47079c466f4344842130e90f33fe04e6e77b 100644 (file)
--- a/bsd/man/man2/sigaction.2
+++ b/bsd/man/man2/sigaction.2
@@ -32,7 +32,7 @@
 .\"    From: @(#)sigaction.2   8.2 (Berkeley) 4/3/94
 .\" $FreeBSD: src/lib/libc/sys/sigaction.2,v 1.48 2003/03/24 16:07:19 charnier Exp $
 .\"
-.Dd April 3, 1994
+.Dd September 18, 2008 
 .Dt SIGACTION 2
 .Os
 .Sh NAME
@@ -43,23 +43,28 @@
 .Sh SYNOPSIS
 .In signal.h
 .Bd -literal
+
 struct  sigaction {
-        union {
-                void    (*__sa_handler)(int);
-                void    (*__sa_sigaction)(int, struct __siginfo *, void *);
-        } __sigaction_u;                /* signal handler */
-        int     sa_flags;               /* see signal options below */
+        union __sigaction_u __sigaction_u;  /* signal handler */
         sigset_t sa_mask;               /* signal mask to apply */
+        int     sa_flags;               /* see signal options below */
+};
+
+union __sigaction_u {
+       void    (*__sa_handler)(int);
+       void    (*__sa_sigaction)(int, siginfo_t *,
+                      void *);
 };
 
 #define        sa_handler      __sigaction_u.__sa_handler
 #define        sa_sigaction    __sigaction_u.__sa_sigaction
+
 .Ed
 .Ft int
 .Fo sigaction
 .Fa "int sig"
-.Fa "const struct sigaction * restrict act"
-.Fa "struct sigaction * restrict oact"
+.Fa "const struct sigaction *restrict act"
+.Fa "struct sigaction *restrict oact"
 .Fc
 .Sh DESCRIPTION
 The system defines a set of signals that may be delivered to a process.
@@ -416,17 +421,11 @@ Base Interfaces:
 Realtime Interfaces:
 .Pp
 .Fn aio_error ,
-.Fn clock_gettime ,
 .Fn sigpause ,
-.Fn timer_getoverrun ,
 .Fn aio_return ,
-.Fn fdatasync ,
-.Fn sigqueue ,
-.Fn timer_gettime ,
 .Fn aio_suspend ,
 .Fn sem_post ,
-.Fn sigset ,
-.Fn timer_settime .
+.Fn sigset .
 .Pp
 ANSI C Interfaces:
 .Pp
@@ -534,6 +533,7 @@ system call
 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
@@ -541,16 +541,22 @@ or
 .Fa oact
 points to memory that is not a valid part of the process
 address space.
+.\" ===========
 .It Bq Er EINVAL
 The
 .Fa sig
 argument
 is not a valid signal number.
+.\" ===========
 .It Bq Er EINVAL
 An attempt is made to ignore or supply a handler for
 .Dv SIGKILL
 or
 .Dv SIGSTOP .
+.\" ===========
+.It Bq Er EINVAL
+An attempt was made to set the action to SIG_DFL
+for a signal that cannot be caught or ignored (or both).
 .El
 .Sh STANDARDS
 The