+++ /dev/null
-.\" Copyright (c) 2007 Michael Kerrisk <mtk.manpages@gmail.com>
-.\"
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-.\" Since the Linux kernel and libraries are constantly changing, this
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-.\" responsibility for errors or omissions, or for damages resulting from
-.\" the use of the information contained herein. The author(s) may not
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-.\"
-.TH SYSV_SIGNAL 3 2014-01-06 "" "Linux Programmer's Manual"
-.SH NAME
-sysv_signal \- signal handling with System V semantics
-.SH SYNOPSIS
-.BR "#define _GNU_SOURCE" " /* See feature_test_macros(7) */"
-.br
-.B #include <signal.h>
-.sp
-.B typedef void (*sighandler_t)(int);
-.sp
-.BI "sighandler_t sysv_signal(int " signum ", sighandler_t " handler );
-.SH DESCRIPTION
-The
-.BR sysv_signal ()
-function takes the same arguments, and performs the same task, as
-.BR signal (2).
-
-However
-.BR sysv_signal ()
-provides the System V unreliable signal semantics, that is:
-a) the disposition of the signal is reset to the default
-when the handler is invoked;
-b) delivery of further instances of the signal is not blocked while
-the signal handler is executing; and
-c) if the handler interrupts (certain) blocking system calls,
-then the system call is not automatically restarted.
-.SH RETURN VALUE
-The
-.BR sysv_signal ()
-function returns the previous value of the signal handler, or
-.B SIG_ERR
-on error.
-.SH ERRORS
-As for
-.BR signal (2).
-.SH ATTRIBUTES
-.SS Multithreading (see pthreads(7))
-The
-.BR sysv_signal ()
-function is thread-safe.
-.SH CONFORMING TO
-This function is nonstandard.
-.SH NOTES
-Use of
-.BR sysv_signal ()
-should be avoided; use
-.BR sigaction (2)
-instead.
-
-On older Linux systems,
-.BR sysv_signal ()
-and
-.BR signal (2)
-were equivalent.
-But on newer systems,
-.BR signal (2)
-provides reliable signal semantics; see
-.BR signal (2)
-for details.
-
-The use of
-.I sighandler_t
-is a GNU extension;
-this type is defined only if
-the
-.B _GNU_SOURCE
-feature test macro is defined.
-.SH SEE ALSO
-.BR sigaction (2),
-.BR signal (2),
-.BR bsd_signal (3),
-.BR signal (7)
-.SH COLOPHON
-This page is part of release 3.79 of the Linux
-.I man-pages
-project.
-A description of the project,
-information about reporting bugs,
-and the latest version of this page,
-can be found at
-\%http://www.kernel.org/doc/man\-pages/.
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