@node sigemptyset, signal
@subheading Syntax

@example
#include <signal.h>

int sigemptyset (sigset_t *set)
@end example

@subheading Description

This function initializes the set of signals pointed to by @var{set} to
exclude all signals known to the DJGPP runtime system.  Such an empty
set, if passed to @code{sigprocmask} (@pxref{sigprocmask}), will cause
all signals to be passed immediately to their handlers.

@subheading Return Value

0 upon success, -1 if @var{set} is a NULL pointer.

@subheading Portability

@portability !ansi, posix