NAME

bsd_signal − Interface to simplified signal facilities

SYNOPSIS

#include <signal.h>
void (∗bsd_signal(
        int sig,
        void (∗function) (int)))(int );

LIBRARY

Standard C Library (libc)

STANDARDS

Interfaces documented on this reference page conform to industry standards as follows:

bsd_signal():  XSH4.2, XSH5.0

Refer to the standards(5) reference page for more information about industry standards and associated tags. 

PARAMETERS

sigDefines the signal. 

function
Specifies the address of a signal handler.

DESCRIPTION

The bsd_signal() function provides a partially compatible interface for programs written to historical system interfaces. 

The handler function should be declared as follows (sig is the signal number). 

void handler (int sig);

The behavior of bsd_signal() is undefined if the handler function takes more than one argument, or an argument of a different type. 

The bsd_signal() function is a direct replacement for the BSD signal() function in simple applications that are installing a single-argument signal handler. If the application is installing a BSD signal handler that expects more than one argument, the application has to be modified to use sigaction(). The bsd_signal() function differs from signal() in that the SA_RESTART flag is set and the SA_RESETHAND will be clear when the libsys5 version of bsd_signal() is used. The state of these flags is not specified for signal(). 

RETURN VALUES

Upon successful completion, bsd_signal() returns the previous action for sig. Otherwise, SIG_ERR is returned and errno is set to indicate the error. 

ERRORS

Refer to sigaction(2). 

SEE ALSO

Functions: sigaction(2), signal(2), sigaddset(3), sigemptyset(3)

Standards: standards(5)