Name
gsignal, ssignal — software signal facility
Synopsis
#include <signal.h> typedef void (*sighandler_t)(int);
int
gsignal( |
intsignum); |
sighandler_t
ssignal( |
int signum, |
sighandler_t action); |
![[Note]](../stylesheet/note.png) |
Note | ||
|---|---|---|---|
|
DESCRIPTION
Don't use these functions under Linux. Due to a historical mistake, under Linux these functions are aliases for raise(3) and signal(2), respectively.
Elsewhere, on System V-like systems, these functions
implement software signaling, entirely independent of the
classical signal(2) and kill(2) functions. The
function ssignal() defines the
action to take when the software signal with number
signum is raised
using the function gsignal(),
and returns the previous such action or SIG_DFL. The function gsignal() does the following: if no action
(or the action SIG_DFL) was
specified for signum,
then it does nothing and returns 0. If the action
SIG_IGN was specified for
signum, then it does
nothing and returns 1. Otherwise, it resets the action to
SIG_DFL and calls the action
function with argument signum, and returns the value
returned by that function. The range of possible values
signum varies (often
1-15 or 1-17).
CONFORMING TO
These functions are available under AIX, DG/UX, HP-UX,
SCO, Solaris, Tru64. They are called obsolete under most of
these systems, and are broken under Linux libc and glibc.
Some systems also have gsignal_r() and ssignal_r().
COLOPHON
This page is part of release 3.33 of the Linux man-pages project. A
description of the project, and information about reporting
bugs, can be found at http://man7.org/linux/man-pages/.
|
Copyright (C) 2002 Andries Brouwer <aebcwi.nl> Permission is granted to make and distribute verbatim copies of this manual provided the copyright notice and this permission notice are preserved on all copies. Permission is granted to copy and distribute modified versions of this manual under the conditions for verbatim copying, provided that the entire resulting derived work is distributed under the terms of a permission notice identical to this one. Since the Linux kernel and libraries are constantly changing, this manual page may be incorrect or out-of-date. The author(s) assume no responsibility for errors or omissions, or for damages resulting from the use of the information contained herein. The author(s) may not have taken the same level of care in the production of this manual, which is licensed free of charge, as they might when working professionally. Formatted or processed versions of this manual, if unaccompanied by the source, must acknowledge the copyright and authors of this work. This replaces an earlier man page written by Walter Harms <walter.harmsinformatik.uni-oldenburg.de>. |